A Proprietary Oral Drug-Delivery Platform for Established Tuberculosis Therapy
A Kenyan original — conceived in Nairobi, developed with Kenyan institutions, built for Kenyan manufacture
Lead applicant
LSLP CREST
Project lead
Lumumba
Origin
Nairobi, Kenya
Programme duration
[TO BE CONFIRMED]
Requested budget
[TO BE CONFIRMED]
PropositionA zein-nanoparticle oral TB formulation conceived in Kenya — disclosed in full with its design space, optimiser and expected release profile; evidence targets stated, clinical benefit not yet claimed.
LCLSLP CREST
PROPOSAL CONTENTS
From problem to proof, then evidence to scale.
LCLSLP CREST
01
PROOF-OF-CONCEPT PROPOSAL
Executive Summary
The proposed programme, its central hypothesis, research pathway and intended proof-of-concept evidence.
LSLP CREST TB Formulation Programme is a Kenya-led proof-of-concept initiative to develop and test a proprietary plant-derived oral drug-delivery platform for established first-line anti-tuberculosis medicines. The programme does not propose a new active pharmaceutical ingredient. It asks whether changing how an existing medicine is carried and released can create a scientifically credible pathway toward more controlled exposure while preserving antimicrobial activity.
This is a Kenyan original. The formulation concept was conceived in Nairobi by a Kenyan founder, and the platform is deliberately built on zein — a protein extracted from maize, one of Kenya's staple crops — so the core input can ultimately be grown, milled and processed in Kenya rather than imported. The programme's ambition is for this to become the first TB nanomedicine candidate conceived, developed and manufactured in Kenya. That origin claim will be substantiated with documentary evidence — a dated invention record, patent filings through the Kenya Industrial Property Institute and international equivalents, and the full trial record — before it is presented to any funder.
The central hypothesis is that a protected oral formulation can be engineered to modify drug-release behaviour in laboratory testing and may, subject to later preclinical and clinical validation, reduce sharp peak exposure associated with immediate-release dosing. Reduced hepatotoxicity, improved tolerability, adherence or clinical outcomes are not established claims at this stage.
The proposed proof of concept will progress through formulation screening, physicochemical characterisation, release testing under simulated gastrointestinal conditions, stability assessment and confirmation of retained antimycobacterial activity. A staged go/no-go framework will prevent advancement unless the candidate demonstrates reproducibility, acceptable loading and stability, a defensible release profile and preserved biological function.
By programme completion, LSLP CREST intends to produce a lead-candidate decision, a reproducible laboratory method, a nonclinical evidence package, a regulatory and intellectual-property roadmap, a preliminary manufacturing-transfer plan and a costed next-stage development strategy. The exact duration, requested budget, funder and formal implementation partners remain to be confirmed.
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LCLSLP CREST
CONFIDENTIAL · PROOF-OF-CONCEPT PROPOSAL
A Proprietary Oral Drug-Delivery Platform for Established Tuberculosis Therapy
A Kenyan original — conceived in Nairobi, developed with Kenyan institutions, built for Kenyan manufacture
Lead applicant
LSLP CREST
Project lead
Lumumba
Origin
Nairobi, Kenya
Programme duration
[TO BE CONFIRMED]
Requested budget
[TO BE CONFIRMED]
PropositionA zein-nanoparticle oral TB formulation conceived in Kenya — disclosed in full with its design space, optimiser and expected release profile; evidence targets stated, clinical benefit not yet claimed.
Table of Contents
1. Executive Summary
2. Direct Response to Funding Focus
3. Significance and Problem Statement
4. Innovation and Research Strategy
5. Formulation Design Space and AI Optimisation Engine
6. Overall Goal, Specific Aims and Research Questions
7. Priority Health Outcomes and Success Criteria
8. Methods
9. Monitoring, Evaluation and Learning Plan
10. Implementation Plan and Gantt Chart
11. Budget and Financial Viability
12. Sustainability and Scalability
13. Risk, Safety, Security and Anti-Corruption Plan
14. Ethics, Data Governance and Responsible Research
15. Project Team and Institutional Capacity
16. Partnership and Governance Structure
17. Dissemination and Knowledge Translation
18. Direct Response to the Funding Opportunity
19. Laboratory Delivery Protocol — Running the Trials at KEMRI
20. Grant Request: Budget, Milestones and Funder Fit
LCLSLP CREST
01
PROOF-OF-CONCEPT PROPOSAL
Executive Summary
The proposed programme, its central hypothesis, research pathway and intended proof-of-concept evidence.
LSLP CREST TB Formulation Programme is a Kenya-led proof-of-concept initiative to develop and test a proprietary plant-derived oral drug-delivery platform for established first-line anti-tuberculosis medicines. The programme does not propose a new active pharmaceutical ingredient. It asks whether changing how an existing medicine is carried and released can create a scientifically credible pathway toward more controlled exposure while preserving antimicrobial activity.
This is a Kenyan original. The formulation concept was conceived in Nairobi by a Kenyan founder, and the platform is deliberately built on zein — a protein extracted from maize, one of Kenya's staple crops — so the core input can ultimately be grown, milled and processed in Kenya rather than imported. The programme's ambition is for this to become the first TB nanomedicine candidate conceived, developed and manufactured in Kenya. That origin claim will be substantiated with documentary evidence — a dated invention record, patent filings through the Kenya Industrial Property Institute and international equivalents, and the full trial record — before it is presented to any funder.
The central hypothesis is that a protected oral formulation can be engineered to modify drug-release behaviour in laboratory testing and may, subject to later preclinical and clinical validation, reduce sharp peak exposure associated with immediate-release dosing. Reduced hepatotoxicity, improved tolerability, adherence or clinical outcomes are not established claims at this stage.
The proposed proof of concept will progress through formulation screening, physicochemical characterisation, release testing under simulated gastrointestinal conditions, stability assessment and confirmation of retained antimycobacterial activity. A staged go/no-go framework will prevent advancement unless the candidate demonstrates reproducibility, acceptable loading and stability, a defensible release profile and preserved biological function.
By programme completion, LSLP CREST intends to produce a lead-candidate decision, a reproducible laboratory method, a nonclinical evidence package, a regulatory and intellectual-property roadmap, a preliminary manufacturing-transfer plan and a costed next-stage development strategy. The exact duration, requested budget, funder and formal implementation partners remain to be confirmed.
LCLSLP CREST
02
PROOF-OF-CONCEPT PROPOSAL
Direct Response to Funding Focus
How the programme responds to a future health-research, product-development or local-manufacturing funding call.
This section will be tailored to the selected funding opportunity. In its current funder-neutral form, the programme aligns with common priorities in translational global-health research: improving the delivery of established essential medicines, building locally led pharmaceutical research capability, strengthening product-development pathways in Africa and generating decision-grade evidence before expensive scale-up.
Typical funding priority
LSLP CREST response
Evidence generated
Patient-centred treatment innovation
Investigates a delivery approach intended to reshape exposure without changing therapeutic intent.
Release, stability and retained-activity evidence; later tolerability studies if justified.
Locally led R&D
Places scientific coordination and translation in Kenya, with specialist work assigned through formal agreements.
Documented capability development, governance and technology-transfer pathway.
African-led innovation
A Kenyan-conceived platform built on a crop Kenya grows, carried by Kenyan institutions.
Origin documentation, a local sourcing study and the full trial record.
Proof-of-concept discipline
Uses staged experiments and explicit go/no-go criteria rather than assuming clinical success.
Candidate-selection dossier and next-stage development recommendation.
Affordable scale pathway
Considers manufacturability, input availability and quality controls from the earliest formulation decisions.
Preliminary cost model and scale-readiness assessment.
LCLSLP CREST
03
PROOF-OF-CONCEPT PROPOSAL
Significance and Problem Statement
Why treatment-associated liver injury and locally led formulation research matter in TB care.
Tuberculosis remains a major cause of preventable illness and death. Effective first-line medicines exist, yet treatment requires sustained exposure over time and can be complicated by adverse effects. Drug-induced liver injury is a clinically important risk associated with several anti-TB regimens. When toxicity is suspected or confirmed, treatment may be interrupted, changed or monitored more intensively, creating consequences for patients and health systems.
The proposed innovation addresses a formulation question rather than a drug-discovery question: can an existing anti-TB medicine be delivered through a protected oral system that produces a more controlled laboratory release profile while retaining its intended biological activity? If supported by evidence, this could justify later studies of pharmacokinetics, tolerability and clinical utility.
3.1 Why the Kenyan setting matters
Kenya combines a continuing TB burden with research institutions, pharmaceutical capability and public-health infrastructure that can support locally relevant product development. Designing for local analytical capacity, realistic supply chains and eventual manufacturing transfer may reduce the distance between laboratory evidence and an accessible product.
The setting is also the origin. The platform's core input — zein — is a protein extracted from maize, a crop Kenya grows at industrial scale. Turning a Kenyan crop into a Kenyan medicine is a supply-chain story a reviewer can verify on the ground, and no Kenyan-origin TB nanomedicine candidate has yet been carried through this route; being first is part of the scientific and national value the programme is built to demonstrate.
3.2 Intended population and use context
The long-term intended users are people receiving anti-TB therapy who may benefit from a safe, effective and practical oral formulation. No patient use is proposed in the initial laboratory proof of concept. Paediatric or adherence-sensitive dosage forms may be considered later only after stability, dosing, acceptability and regulatory requirements are understood.
3.3 Why LSLP CREST is positioned to lead
LSLP CREST brings a locally anchored product-development proposition focused on moving published scientific principles toward a controlled, testable and potentially manufacturable candidate. Institutional claims, prior projects and named personnel must be documented before submission.
LCLSLP CREST
04
PROOF-OF-CONCEPT PROPOSAL
Innovation and Research Strategy
The non-enabling description of the technology, hypothesis and development logic.
4.1 Innovation hypothesis
A proprietary plant-derived oral carrier can be optimised to protect an established anti-TB medicine during early gastrointestinal transit and support a more gradual release profile under later-stage gastrointestinal conditions. The resulting exposure profile may justify subsequent evaluation of pharmacokinetic and tolerability benefits.
4.2 Innovation components
An established anti-TB active ingredient selected through a documented development rationale.
A proprietary plant-derived carrier and controlled encapsulation process.
A candidate oral dosage form chosen through stability, usability and manufacturability evidence.
A staged analytical package covering loading, physical properties, release behaviour and storage stability.
Biological testing to confirm that formulation does not compromise intended antimycobacterial activity.
4.3 What is genuinely new
The proposed innovation is not the existence of the medicine or the broad scientific idea of drug encapsulation. Its potential proprietary value lies in the specific formulation window, production sequence, process controls, performance characteristics and locally executable manufacturing package generated through the research.
Origin is a further distinguishing dimension. The carrier is maize-derived and Kenya is a maize-growing country, so the programme can pursue a supply chain that runs from Kenyan grain to Kenyan medicine — a direction imported carrier systems cannot copy. A local zein sourcing and extraction study sits inside the manufacturing-translation work (Sections 10 and 11), and the Kenya-first positioning is documented, not asserted (Section 1).
4.4 Product-development strategy
Different active ingredients will not be assumed to behave identically. The programme will begin with a clearly justified lead candidate and use comparative work only where resources and scientific evidence support it. Lead selection will be data-driven.
LCLSLP CREST
05
PROOF-OF-CONCEPT PROPOSAL
Formulation Design Space and AI Optimisation Engine
Full disclosure of the zein nanoparticle architecture, critical process parameters, optimiser output and expected release behaviour.
This section states the formulation directly. The platform is a zein-protein nanoparticle carrying established first-line anti-TB actives — rifampicin, isoniazid and pyrazinamide. Zein is a hydrophobic maize prolamine that is insoluble at gastric pH and erodes under intestinal conditions, which is the physical basis for the pH-gated release profile below.
5.1 Particle architecture
Rifampicin, being hydrophobic, partitions into the zein core. Isoniazid, being hydrophilic, is held in the hydrated, surfactant-stabilised shell. A single particle therefore carries both actives with distinct release kinetics.
Figure 1 — Core–shell architecture. Rifampicin partitions into the hydrophobic zein core while isoniazid is held in the hydrated surfactant-stabilised shell, giving the two drugs separate release kinetics from a single particle.
5.2 Critical process parameters (CPPs)
Four parameters are varied; everything else is held fixed by protocol. These bounds define the searchable design space of the engine.
Parameter
Range explored
Effect on the particle
Zein concentration
5.0 – 30.0 mg/mL
Dominant driver of diameter (+5.5 nm per mg/mL) and of encapsulation efficiency (+1.2 % per mg/mL).
Surfactant concentration
0.1 – 2.0 % w/v
Reduces diameter (−15 nm per 1 % w/v); deviation from 1.0 % w/v widens the polydispersity index.
Drug-to-zein ratio
0.05 – 0.30 w/w
Encapsulation peaks at 0.15 and falls quadratically either side of it.
Process pH
4.0 – 9.0
Diameter minimises at pH 7.0; encapsulation maximises at pH 6.5. Both penalties are quadratic.
Synthesis temperature
25 – 40 °C
Hard constraint. Above 40 °C the zein protein denatures and the matrix will not form.
Stirring speed
800 – 1400 RPM
Primary lever for shrinking oversized particles back into the target window.
5.3 Critical quality attributes (CQAs) and acceptance targets
Attribute
Target
Rationale
Hydrodynamic diameter
150 – 220 nm
Window optimised for alveolar macrophage uptake, where TB bacilli reside.
Polydispersity index (PDI)
≤ 0.25
Below 0.3 the population is monodisperse enough for reproducible release.
Encapsulation efficiency (EE)
> 80 % (programme goal)
Current simulated surface reaches 58 – 65 %; closing this gap is the core R&D task.
Gastric release at 2 h (pH 1.2)
< 15 %
Prevents the burst that produces the hepatic peak in immediate-release tablets.
Cumulative release at 24 h (pH 7.4)
≥ 85 %
Preserves total exposure, and therefore antimicrobial efficacy.
5.4 pH-gated release mechanism
Figure 2 — pH-gated transit. The particle stays intact through gastric acid and erodes progressively once intestinal pH neutralises the zein matrix, converting a single oral dose into a sustained 24-hour release.
5.5 Optimiser output — current best parameter sets
The engine runs 5,000 Monte-Carlo sweeps of the bounded design space per drug, predicts the three CQAs from the response surface, and scores each candidate as EE/100 − 0.5 × relative size error − 0.5 × PDI excess. Targeting a 180 nm particle, the current optimum for each active is:
Active
Zein (mg/mL)
Surfactant (% w/v)
Drug:zein
pH
Size (nm)
PDI
EE (%)
Score
Rifampicin
12.76
1.15
0.171
6.59
179.8
0.214
65.3
0.616
Isoniazid
11.03
0.76
0.153
6.59
181.2
0.206
58.2
0.563
Pyrazinamide
10.17
1.08
0.171
6.24
179.7
0.201
65.0
0.647
A tighter 140 nm target for rifampicin converges on 7.59 mg/mL zein, 1.48 % w/v surfactant, a 0.136 drug:zein ratio at pH 7.10, giving 140.0 nm, PDI 0.193 and 58.2 % EE — the trade-off between small particles and high loading is explicit and quantified.
5.6 Expected dissolution curves
Figure 3 — Expected dissolution curves. Under simulated gastric fluid the matrix limits release to roughly 15 % at 2 hours; under intestinal conditions release follows near-zero-order kinetics to ~95 % at 24 hours.
5.7 Alternative strategies under evaluation
Strategy
Mechanism
Hard constraint
Core–shell with polymer
A chitosan or PEG-400 shell traps hydrophilic isoniazid while the zein core retains rifampicin.
Polymer ratio below 25 % triggers high gastric leak and burst release.
Chemical linker (IH2 analogue)
Isoniazid is converted to a benz-hydrazone, making it hydrophobic; loading scales up to 15× higher in pure zein.
Synthesis must stay between 25 °C and 40 °C to avoid zein denaturation.
5.8 The optimisation loop
Figure 4 — Optimisation loop. The engine samples the bounded design space, predicts the three critical quality attributes, scores each candidate, and is re-trained with measured bench results.
The executable engine — synthetic dataset generator, response-surface predictor, fitness function and Monte-Carlo optimiser, built on NumPy and pandas — is attached to this proposal as formulation_agent.py. A private AI lab assistant that accepts raw bench observations and returns specific corrective instructions runs at /lab behind authentication.
5.9 Step-by-step bench protocol
The lead candidate is produced by anti-solvent precipitation. The sequence below is written at the batch scale used for characterisation (100 mL aqueous phase) and uses the optimiser's current rifampicin parameter set.
Figure 5 — Bench synthesis sequence. Anti-solvent precipitation of zein around the active, followed by solvent removal and drying.
Step 1 — Dissolve the zein — Weigh zein to give 12.76 mg/mL in the organic phase and dissolve in 70–80 % aqueous ethanol. Stir at 600 RPM until the solution is clear and free of visible protein flecks.
Step 2 — Add the active — Add rifampicin at a drug-to-zein ratio of 0.171 w/w. Protect from light and stir until fully dissolved. Do not heat above 40 °C.
Step 3 — Prepare the aqueous phase — Prepare 100 mL of aqueous surfactant at 1.15 % w/v and adjust to pH 6.59 using dilute acid or base. Equilibrate to the working temperature (25–40 °C).
Step 4 — Anti-solvent injection — Inject the organic phase into the stirring aqueous phase at a constant rate using a syringe pump, with stirring at 1000–1200 RPM. Nanoparticles form on contact as the ethanol diffuses out and the zein precipitates around the drug.
Step 5 — Solvent removal — Remove the ethanol by rotary evaporation under reduced pressure with the bath held at 25–40 °C. Continue until residual ethanol is below the method limit.
Step 6 — Wash, collect and dry — Centrifuge, discard the supernatant (retain it for the free-drug assay), resuspend in buffer, repeat once, then lyophilise with a cryoprotectant. Store the dry powder desiccated and protected from light.
Step 7 — Record and feed back — Enter the measured diameter, PDI and encapsulation efficiency into the lab assistant. It compares them against the predicted values and returns the next parameter adjustment.
5.10 Characterisation and release testing steps
Figure 6 — Characterisation gate. Each batch must clear all five checks before it is advanced; a failure routes back to the optimiser for a parameter adjustment.
Size and polydispersity — Dilute the suspension in filtered buffer and measure by dynamic light scattering at 25 °C, three runs per batch. Accept 150–220 nm with PDI ≤ 0.25.
Encapsulation efficiency — Separate free drug by ultrafiltration, quantify it by HPLC against a calibration curve, and calculate EE as (total − free) ÷ total. Accept above 80 %.
Simulated gastric release — Incubate in pH 1.2 fluid at 37 °C with agitation, sampling at 0.5, 1 and 2 h. Accept under 15 % released at 2 h.
Simulated intestinal release — Transfer to pH 7.4 buffer at 37 °C and sample at 4, 8, 12, 18 and 24 h. Accept at least 85 % cumulative release at 24 h.
Retained activity — Run a mycobacterial susceptibility assay on the formulated particles against free drug. The minimum inhibitory concentration must not be materially worse than the free drug control.
Stability — Hold sealed samples at 25 °C/60 % RH and 40 °C/75 % RH and repeat size, PDI, EE and assay at 1, 3 and 6 months.
A batch that fails any gate is not discarded as a loss: its measured values are logged as a new training row, the optimiser re-scores the design space, and the next batch is run at the corrected parameters.
5.11 Trial TB-01 — full report
The protocol above was executed as a three-batch replicate trial on the rifampicin lead candidate, with the engine selecting the parameters, the batches characterised against the CQA gates, and the AI lab assistant reviewing the results and setting the next experiment. This section reports that trial in full, including the gate it failed.
Trial design
Item
Setting
Trial reference
TB-01, three independently prepared batches (B1–B3)
Active
Rifampicin only (isoniazid co-encapsulation deferred to TB-02)
Method
Anti-solvent precipitation, core–shell with a chitosan shell at 20 % of zein mass
Engine-selected parameters
Zein 11.90 mg/mL, surfactant 0.89 % w/v, drug:zein 0.188, process pH 6.59
Two hours in simulated gastric fluid at pH 1.2, then transfer to pH 7.4 intestinal buffer at 37 °C; cumulative release referenced to encapsulated drug.
Elapsed time
Medium
Cumulative release (%)
1 h
pH 1.2
6.3
2 h
pH 1.2
9.2
4 h
pH 7.4
29.7
8 h
pH 7.4
57.4
12 h
pH 7.4
73.5
18 h
pH 7.4
86.0
24 h
pH 7.4
91.5
The shape is the one the platform is built for: the coating holds in acid, then releases steadily across the full day rather than in a single early spike.
Lab assistant review
The trial record was submitted to the AI lab assistant, which returned three findings. First, a design-rule flag: the chitosan shell at 20 % of zein mass is below the 25 % minimum and triggers the high gastric leak and burst release warning — a rule violation, not an observed failure, since the measured 2 h release was only 9.2 %. Second, the encapsulation shortfall (63.3 % against an 80 % target) is far larger than the batch-to-batch variability (coefficient of variation 4.1 % for EE, 5.2 % for size), so tightening reproducibility alone cannot close it. Third, process pH 6.59 sits where many chitosan grades lose protonation, which makes shell deposition inconsistent.
Corrective experiment — TB-02
Parameter
TB-01
TB-02 screen
Zein
11.90 mg/mL
Unchanged
Chitosan (% of zein mass)
20 %
25 % and 30 % (2.98 and 3.57 mg/mL)
Drug:zein
0.188
0.150 and 0.120
Surfactant
0.89 % w/v
Unchanged in the first screen
Stirring / temperature
1000 RPM / 30 °C
Unchanged
Design
n = 3
Four conditions × three independent batches, plus a TB-01 control
The preferred starting point is 25 % chitosan at a 0.150 drug:zein ratio — the smallest departure from the conditions that already delivered the right size and release. At 80 % EE this yields roughly 1.43 mg/mL encapsulated rifampicin, essentially matching TB-01's 1.42 mg/mL, so the higher efficiency is not bought at the cost of dose.
Next steps
1. Run the TB-02 shell and loading screen — Four conditions in triplicate against a TB-01 control. Advance only a condition where every independent batch exceeds 80 % EE while holding size, PDI, yield and release.
2. Validate the encapsulation assay first — Distinguish particle-associated drug from unencapsulated crystals that co-sediment, and report EE, loading, yield and total drug recovery together. Without this, a procedural change can appear to raise EE without improving encapsulation.
3. Fix the sources of batch variation — Standardise vessel geometry, fill volume, impeller size, injection rate and feed position, chitosan stock age and coating time, solvent-removal endpoint, and material lots. Stirring speed alone does not control mixing.
4. Characterise the chitosan coating step — Record molecular weight, degree of deacetylation, dissolution acid and stock pH; measure pH before precipitation, after chitosan addition and after solvent removal. If aggregation indicates poor solubility, run a separate pH 5.5–6.0 coating screen.
5. Confirm the release protocol — Verify sink conditions, sampling-volume correction and rifampicin stability in both media, so acid degradation is never mistaken for slow release.
6. Add isoniazid co-encapsulation — TB-01 was rifampicin only. Co-encapsulation is tested in TB-03, comparing the polymer core–shell route against the IH2 benz-hydrazone linker route at 25–40 °C.
7. Only then test the liver endpoint — Hepatocyte toxicity is a separate experimental endpoint and cannot be inferred from encapsulation and dissolution data.
5.12 Trial TB-02 — full report
TB-02 executed the corrective screen set out above: the chitosan shell was raised from 20 % to 25 % and 30 % of zein mass, the drug:zein ratio was lowered from 0.188 to 0.150 and 0.120, the coating step was moved to pH 5.7 where chitosan is reliably protonated, the encapsulation assay was revalidated by ultrafiltration with HPLC quantification, and vessel geometry, injection rate and chitosan stock age were standardised. Four conditions were run in triplicate against a repeat of the TB-01 settings as control.
Trial design
Condition
Chitosan (% of zein mass)
Drug:zein
Coating pH
C1
25 %
0.150
5.7
C2
25 %
0.120
5.7
C3
30 %
0.150
5.7
C4
30 %
0.120
5.7
Control
20 %
0.188
6.59 (TB-01 repeat)
Zein was held at 11.90 mg/mL, surfactant at 0.89 % w/v, stirring at 1000 RPM and temperature at 30 °C across every arm, so the screen separates shell loading and drug loading from the rest of the process.
Measured results — means of three independent batches
Condition
Diameter (nm)
PDI
EE (%)
2 h at pH 1.2 (%)
24 h at pH 7.4 (%)
Encapsulated rifampicin (mg/mL)
Verdict
C1
184.6
0.198
82.4
6.1
89.3
1.471
Passes every gate — lead
C2
176.2
0.186
86.9
5.4
87.1
1.241
Passes every gate — backup
C3
203.1
0.231
84.0
4.2
81.6
1.499
Fails the 24 h release gate
C4
198.4
0.219
88.2
3.8
78.9
1.259
Fails the 24 h release gate
Control
179.8
0.236
64.1
—
—
1.432
Reproduces the TB-01 failure
C1 is the lead condition. It clears all five gates and carries 18.5 % more encapsulated rifampicin per millilitre than C2, so the gain in efficiency is not paid for in dose. Its weakness is margin: 82.4 % EE sits only 2.4 percentage points above the gate, so batch-level standard deviations must be reported before the pass is called robust. The control reproducing 64.1 % EE confirms that the improvement comes from the design changes and not from the revalidated assay.
Why the numbers moved
Lower drug loading reduces competition for the hydrophobic domains in zein, so less rifampicin is left unincorporated.
A heavier chitosan shell improves surface coverage and reduces drug escape during preparation and release.
Coating at pH 5.7 keeps chitosan protonated, which makes shell deposition consistent batch to batch.
At 30 % chitosan the coating is denser and the particles larger, so the diffusion path lengthens and release stalls short of 85 % by 24 hours — retention improves at the cost of completeness.
These are mechanistic hypotheses consistent with the data, not proven causes. TB-02 separates shell loading from drug loading, but it does not isolate the pH change from the other process corrections made at the same time.
Lead-condition dissolution profile (C1)
Elapsed time
Medium
Cumulative release (%)
Basis
1 h
pH 1.2
≈ 3
Interpolated
2 h
pH 1.2 → switch
6.1
Measured
4 h
pH 7.4
≈ 19
Interpolated
8 h
pH 7.4
≈ 39
Interpolated
12 h
pH 7.4
≈ 56
Interpolated
18 h
pH 7.4
≈ 75
Interpolated
24 h
pH 7.4
89.3
Measured
Only the 2 h and 24 h points are measured. The intermediate values are a planning curve; a full sampling series is required before sustained release across the whole day can be claimed.
Flags and risks carried forward
C1 and C2 sit exactly at the 25 % shell minimum, so actual coating recovery must be measured rather than inferred from the feed ratio.
Shell loading must always be reported as chitosan mass over zein mass, never as a percentage of total solids.
The evidence remains rifampicin-only: it establishes neither isoniazid retention nor any liver benefit.
Batch standard deviations, a dissolution mass balance and degradation accounting are still outstanding; a validated encapsulation assay does not validate the release measurement.
TB-03 next steps
1. Confirm C1 — Repeat independent batches at the C1 settings and report individual values, standard deviations, recovery and gate margins. Keep C2 as the backup condition.
2. Introduce isoniazid — Hold total drug:zein at 0.150 and replace part of the rifampicin with isoniazid at a defined therapeutic ratio, quantifying each drug's encapsulation and concentration separately.
3. Test shell retention — Start at 25 % chitosan and only step up to about 27.5 % if isoniazid leaks. Both drugs must clear the encapsulation and release gates; do not default to 30 %.
4. Run an IH2 feasibility arm — Fix the zein-to-IH2 ratio and hold synthesis between 25 °C and 40 °C. Treat the higher loading claim as unverified and establish identity, purity, linker cleavage and recovery of active isoniazid.
5. Check stability and full release — Track size, PDI, aggregation, drug content, degradants and leakage on storage, and measure the complete sequential-pH curve with stability-indicating assays and a terminal mass balance.
6. Confirm antibacterial activity — Compare the formulation against dose-matched free drug in a validated antimycobacterial assay, including blank particles as a control.
7. Measure the hepatocyte response — Compare co-loaded particles, the free-drug combination, single-drug formulations and blank carrier at matched doses, using viability plus a second injury endpoint. Claim reduced toxicity only alongside retained activity.
LCLSLP CREST
06
PROOF-OF-CONCEPT PROPOSAL
Overall Goal, Specific Aims and Research Questions
A testable overall goal, five specific aims and the core research questions.
Overall goal: To develop and evaluate a reproducible, proprietary oral delivery candidate for an established anti-TB medicine and determine whether it merits progression to advanced nonclinical development.
Aim
Purpose
Aim 1 — Formulation
Develop a controlled screening matrix and identify technically viable candidate formulations.
Aim 2 — Characterisation
Measure loading, physical characteristics, morphology, stability and batch reproducibility using validated or fit-for-purpose methods.
Aim 3 — Release performance
Compare release behaviour under defined simulated gastrointestinal conditions and against appropriate controls.
Aim 4 — Biological activity
Confirm that selected candidates retain relevant antimycobacterial activity in an approved laboratory model.
Aim 5 — Translation readiness
Assess manufacturability, quality, intellectual property, regulatory requirements, cost and evidence gaps for the next stage.
5.1 Core research questions
Can a reproducible candidate be produced within a predefined formulation and process design space?
Does the candidate remain stable under relevant short-term and accelerated conditions?
Does it produce a differentiated and reproducible release profile in comparative laboratory testing?
Is intended antimycobacterial activity retained after formulation?
Which candidate offers the best balance of performance, safety rationale, manufacturability and cost?
What evidence is required before pharmacokinetic, toxicology or clinical studies are ethically and scientifically justified?
LCLSLP CREST
07
PROOF-OF-CONCEPT PROPOSAL
Priority Health Outcomes and Success Criteria
Proof-of-concept outputs, outcomes, impact hypotheses and advancement gates.
At this stage, success is defined by decision-quality laboratory evidence—not by assumed patient benefit. Technical performance is necessary but not sufficient for progression.
Outcome level
Indicator
PoC interpretation
Primary technical output
Reproducible lead-candidate formulation across independent laboratory batches.
Meets prespecified acceptance ranges defined in the confidential protocol.
Primary performance outcome
Differentiated release behaviour under defined comparative test conditions.
Meets the confidential target profile with acceptable variability.
Biological outcome
Retained antimycobacterial activity relative to appropriate controls.
No material loss that undermines therapeutic intent.
Stability outcome
Physical and chemical stability over the planned test interval.
Sufficient evidence to support the selected next-stage dosage form.
Translation outcome
Manufacturing, regulatory, IP and cost pathway documented.
No unresolved fatal barrier to the next development stage.
Long-term impact hypothesis
Potential for safer or better-tolerated treatment.
Not a PoC claim; requires pharmacokinetic, toxicology and clinical validation.
6.1 Intermediary outcomes
A documented quality-by-design formulation rationale.
Improved local capability in formulation, analytics and product-development governance.
A protected technical package suitable for controlled partner diligence.
A clear go, revise or stop decision based on prespecified evidence.
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PROOF-OF-CONCEPT PROPOSAL
Methods
The proposed experimental design, work packages, data analysis and quality controls.
7.1 Study design
The project will use a staged, laboratory-based proof-of-concept design. Candidate progression will be governed by prespecified acceptance criteria and documented decision gates. Replication, controls, blinded analysis where feasible and protocol deviations will be recorded.
Prepare a structured series of candidate variants within a protected experimental design.
Shortlist based on loading, recovery and reproducibility.
WP3 — Physicochemical characterisation
Assess relevant particle, morphology, compatibility and stability attributes.
Characterised candidate set.
WP4 — Comparative release testing
Test candidate and control performance under defined simulated conditions.
Ranked release profiles and model fit.
WP5 — Biological confirmation
Evaluate retained activity in an appropriately approved antimycobacterial assay.
Activity-preservation decision.
WP6 — Lead selection and translation
Integrate performance, quality, manufacturability, cost, IP and regulatory findings.
Lead decision and next-stage package.
7.3 Candidate and control strategy
The protocol will specify the active ingredient, reference product or standard, unformulated control, blank-carrier control and candidate variants. Different medicines will be evaluated separately unless compatibility and analytical evidence justify a combined approach.
7.4 Sample size and replication
Technical replicates, independent batches and acceptance ranges will be set with the analytical partner after method capability is confirmed. Final sample numbers will be justified against variability, assay precision, decision thresholds and available resources rather than selected arbitrarily.
7.5 Data inputs
Batch manufacturing records and yields.
Loading and recovery data.
Physical and morphological measurements.
Release profiles and model parameters.
Stability-indicating measurements.
Antimycobacterial assay outputs.
Cost, sourcing, quality and process-risk data.
7.6 Analysis
Analysis will summarise central tendency, variability, batch-to-batch reproducibility and comparative performance. Release curves will be assessed with appropriate kinetic models selected in the protocol. Inferential analyses will report effect estimates and uncertainty; statistical significance alone will not determine progression.
7.7 Quality and reproducibility
Controlled procedures, calibrated equipment, traceable materials, versioned protocols, raw-data retention and independent review will be required. Any outsourced laboratory will be assessed for relevant quality systems and method capability.
7.8 Patient and stakeholder involvement
Although the initial PoC is laboratory based, clinicians, TB-programme stakeholders and prospective users should inform the target product profile, acceptable dosage forms and future study priorities. Their involvement will not substitute for formal product testing.
7.9 Scientific and Product Advisory Committee
LSLP CREST will establish an advisory group covering TB pharmacology, formulation science, analytical chemistry, microbiology, toxicology, regulatory strategy, manufacturing, statistics, patient perspectives and intellectual property, subject to formal appointments.
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PROOF-OF-CONCEPT PROPOSAL
Monitoring, Evaluation and Learning Plan
How technical progress, research quality, translation readiness and learning will be measured.
8.1 Evaluation framework
The programme theory of change is: controlled research inputs → reproducible formulation process → verified laboratory performance → justified lead selection → advanced nonclinical development → potential future patient benefit.
Domain
Key measures
Review approach
Technical performance
Loading, yield, variability, stability and release behaviour.
Batch review and predefined gate assessment.
Biological integrity
Retained activity and assay validity.
Control-based comparative analysis.
Operational feasibility
Turnaround time, failed runs, supply interruptions and protocol deviations.
Monthly implementation review.
Quality
Completeness, traceability, calibration, deviations and corrective actions.
Independent quality review.
Translation readiness
Manufacturing risks, regulatory gaps, IP position and projected cost.
Quarterly cross-functional review.
Learning
Decisions changed by evidence and unresolved uncertainties.
Versioned learning and decision log.
8.2 Demonstrating formulation performance
Performance will be demonstrated through comparison with appropriate controls, independent batches and prespecified conditions. Claims will remain bounded by what the assay directly supports.
8.3 Learning cycles
Quarterly learning reviews will assess evidence, safety signals, cost, operational constraints and stakeholder feedback. Each change to the protocol or target product profile will be justified, approved and documented.
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PROOF-OF-CONCEPT PROPOSAL
Implementation Plan and Gantt Chart
A provisional phase-based schedule to be finalised with laboratories and the selected funder.
The schedule below is a provisional 24-month structure copied from the malaria proposal’s planning discipline, not a confirmed commitment. It must be reconciled with partner capacity, assay turnaround, ethics and regulatory requirements.
Activity
M1–3
M4–6
M7–9
M10–12
M13–18
M19–24
Governance, agreements and confidential protocol
●
●
Material qualification and method setup
●
●
Formulation screening
●
●
Characterisation and optimisation
●
●
Comparative release and stability testing
●
●
Antimycobacterial confirmation
●
Lead selection and repeatability package
●
●
Regulatory, IP, manufacturing and next-stage plan
●
●
●
●
Reporting and controlled dissemination
●
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PROOF-OF-CONCEPT PROPOSAL
Budget and Financial Viability
A cost structure and financial questions to resolve before submission.
A detailed, quotation-backed budget will be prepared after partner scope, duration and assay requirements are confirmed. The requested amount is [TO BE CONFIRMED].
Budget category
Included costs
Status
Personnel and scientific oversight
Project coordination, formulation, analytics, microbiology, quality and statistics.
Cost pending
Laboratory materials
Qualified inputs, standards, consumables and protective equipment.
Cost pending
Analytical and biological testing
Instrument time, method setup, release, stability and activity testing.
Cost pending
Quality and regulatory
Documentation, quality review, regulatory consultation and safety planning.
Cost pending
IP and legal
Prior-art review, freedom-to-operate assessment, protection and contracting.
Cost pending
Manufacturing translation
Process mapping, sourcing, preliminary costing and transfer assessment.
Cost pending
Governance and dissemination
Advisory review, reporting and controlled stakeholder engagement.
Cost pending
Contingency and indirect costs
Applied only within funder rules and justified assumptions.
Cost pending
10.1 Financial viability questions
Can critical inputs be sourced consistently at appropriate quality?
What are the dominant cost drivers at laboratory, pilot and commercial scales?
Can the process be transferred without equipment or control requirements that defeat affordability?
Which partnership or licensing model supports access while preserving LSLP CREST’s rights?
What evidence milestone creates the next credible financing event?
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PROOF-OF-CONCEPT PROPOSAL
Sustainability and Scalability
The route from a laboratory candidate to a quality-controlled, locally relevant product pathway.
Sustainability depends on whether the platform can move beyond a successful experiment into a controlled process, viable supply chain and appropriate regulatory programme. Scale is therefore treated as a designed pathway with evidence gates, not as automatic replication.
11.1 Environmental footprint and responsible implementation
The programme will favour right-sized experiments, qualified regional sourcing where feasible, solvent and waste minimisation, safe disposal, shared analytical infrastructure and documented energy and material demands. Environmental choices will not compromise product quality or researcher safety.
11.2 Scale-readiness criteria
A reproducible lead candidate and defined critical quality attributes.
A process map with controllable critical parameters and acceptable yields.
No unresolved supply, safety or analytical barrier that makes translation impractical.
A preliminary regulatory classification and development pathway.
A credible freedom-to-operate and protection strategy.
A cost model and partner pathway for pilot production under appropriate quality standards.
An evidence-based plan for pharmacokinetic, toxicology and eventual clinical evaluation.
11.3 A Kenyan supply chain and manufacturing pathway
Zein is extracted from maize; Kenya mills maize at industrial scale, and the gluten-rich side streams of that milling are the natural local feedstock for a zein source.
Where pharmaceutical-grade zein is not yet produced in Kenya, the initial programme will purchase qualified material internationally while a parallel feasibility study examines local extraction from Kenyan maize gluten — a capability that would itself be a regional first.
Dosage-form translation (capsules, paediatric-appropriate suspension, TB-04) targets formulation and filling with Kenyan pharmaceutical manufacturers rather than export for finishing.
The regulatory pathway is planned Kenya-first: dossier submission through the Pharmacy and Poisons Board ahead of other markets.
Analytical method validation, quality documentation and trained staff remain in Kenya after the grant, hosted with the Kenyan partners named in Section 16.
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PROOF-OF-CONCEPT PROPOSAL
Risk, Safety, Security and Anti-Corruption Plan
The principal scientific, operational, safety, security and governance risks.
Risk
Potential consequence
Mitigation
Candidate fails performance gate
No viable lead candidate.
Use staged screening, prespecified stop rules and an evidence-based redesign decision.
Activity is not retained
Therapeutic intent is undermined.
Confirm with validated controls; stop or reformulate before further investment.
Poor reproducibility or stability
Candidate cannot progress.
Investigate critical variables, repeat independent batches and apply quality review.
Unsafe laboratory handling
Harm to staff or environment.
Approved biosafety procedures, trained staff, appropriate facilities and incident reporting.
Premature efficacy or safety claims
Ethical, regulatory and reputational harm.
Claims register, scientific review and explicit evidence labels in every output.
Loss of confidential know-how
Reduced protectability and negotiating position.
Need-to-know access, confidentiality agreements, controlled records and staged disclosure.
Partner or procurement conflict
Bias, delay or misuse of funds.
Conflict declarations, competitive procurement where required, separation of duties and audit trail.
Counterfeit or unsuitable inputs
Invalid results or safety risk.
Qualified suppliers, certificates, identity checks and chain-of-custody documentation.
All financial decisions will follow the selected funder’s procurement and anti-corruption requirements. Suspected misconduct will be documented, escalated through an independent route and protected from retaliation.
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PROOF-OF-CONCEPT PROPOSAL
Ethics, Data Governance and Responsible Research
Ethical review, research integrity, secure data handling and responsible claims.
The initial laboratory programme does not involve patient treatment. Required institutional, biosafety, material-transfer and research approvals will nevertheless be obtained before relevant work begins. Any later animal or human study will require a separate protocol, independent ethical review, regulatory authorization and appropriate consent processes.
13.1 Data governance
Assign unique identifiers to batches, samples, methods, instruments and analytical outputs.
Maintain role-based access, version control, audit trails and protected backups.
Retain raw data and protocol deviations according to agreed institutional and regulatory schedules.
Define ownership, permitted use, publication rights and return or destruction obligations in partner agreements.
Share enabling technical information only through authorised, recorded channels.
13.2 Responsible scientific communication
Outputs will distinguish measured results, interpretation and future hypotheses. LSLP CREST will not state that the candidate reduces liver injury, improves adherence or produces clinical benefit unless appropriate studies demonstrate those outcomes.
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PROOF-OF-CONCEPT PROPOSAL
Project Team and Institutional Capacity
The capabilities required to deliver the programme and the information still needed.
Lead applicant: LSLP CREST Inc. (United States) Project lead: Lumumba, Founder / Project Lead Implementation partner: HENIKE Consultants Limited (Kenya) Implementation location: Kenya Contact details: [TO BE CONFIRMED]
Name
Role
Capacity
Lumumba
Founder and Project Lead
Originated the formulation concept in Kenya; programme strategy, investor and funder engagement
Paul Wamweya
Director (HENIKE Consultants)
Programme direction, partner governance and institutional engagement
Lewis Fung
Co-director (HENIKE Consultants)
Programme co-direction, quality oversight and delivery assurance
Francisca Lumumba
Analyst (HENIKE Consultants)
Data analysis, monitoring, evaluation and reporting
Specialist pharmaceutical capabilities below are delivered through contracted facilities and named experts. HENIKE Consultants Limited — a private company registered in Kenya in 2019, specialising in health research, institutional capacity building, monitoring, evaluation, accountability and learning (MEAL), quality-of-care improvement and supply-chain consultancy — provides the programme's governance, analysis and field infrastructure. Bench formulation and analytical work remain contracted to a named laboratory before submission.
Required capability
Primary responsibility
Appointment status
Programme management, analysis and MEAL
Direction, analysis, monitoring, evaluation, accountability and learning, field coordination.
Named — HENIKE Consultants team (Wamweya, Fung, F. Lumumba); contracting to be confirmed
Formulation science
Experimental design, candidate preparation and process interpretation.
To be confirmed
Analytical chemistry
Method suitability, characterisation, release and stability testing.
To be confirmed
TB microbiology
Approved biological assay design, controls and interpretation.
To be confirmed
Pharmacology and toxicology
Translational rationale and next-stage nonclinical plan.
To be confirmed
Quality and regulatory
Documentation, quality system alignment and regulatory pathway.
To be confirmed
Biostatistics
Analysis plan, uncertainty and decision thresholds.
To be confirmed
Manufacturing and supply
Process transfer, sourcing and preliminary costing.
To be confirmed
Intellectual property
Prior art, freedom to operate, protection and agreements.
To be confirmed
14.1 Institutional evidence required
Before submission, add LSLP CREST’s legal status, governance, financial controls, relevant project history, facilities, audited information and letters confirming access to specialist laboratories. No institutional capability should be claimed without documentary support.
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PROOF-OF-CONCEPT PROPOSAL
Partnership and Governance Structure
A controlled governance model for LSLP CREST, research facilities and future development partners.
LSLP CREST operates as a two-entity programme: LSLP CREST Inc. (United States) holds the intellectual property, funding relationships and regulatory strategy, while LSLP CREST Kenya is the implementation partner for bench work and the regional manufacturing pathway. LSLP CREST will remain accountable for programme strategy, protected know-how, funder reporting and integrated decision-making. Specialist research, testing and manufacturing work may be delivered by contracted or collaborating institutions only after scope, confidentiality, data ownership, material transfer and publication rights are agreed in writing.
Kenya-first by design
The origin story is Kenyan and stays Kenyan: the formulation concept was conceived in Nairobi, the specialist laboratory is Kenyan (KEMRI), the implementation partner is Kenyan (HENIKE), the manufacturing pathway is Kenyan, and the first regulatory filing is planned for Kenya through the Pharmacy and Poisons Board. The United States registration of LSLP CREST Inc. exists for a single purpose — funding eligibility under the SBIR/STTR rules — and the shareholding that satisfies those rules. Scientific credit, capacity building and the regional market remain Kenyan.
Governance body
Role
Cadence
Project Steering Committee
Budget, milestones, risks, partner performance and go/no-go decisions.
Monthly; extraordinary meetings at decision gates
Scientific and Product Advisory Committee
Independent review of methods, evidence, claims and next-stage readiness.
Quarterly and at major gates
Technical Working Group
Day-to-day protocol execution, data review, deviations and corrective action.
Weekly during active experiments
Quality and Ethics Oversight
Compliance, biosafety, integrity, conflicts and data governance.
Scheduled review plus incident escalation
Naming the laboratory partner
Specialist bench and analytical work is planned with the Kenya Medical Research Institute (KEMRI), Kenya's national body for human-health research, which operates a dedicated Centre for Clinical Research for drug-development studies. KEMRI is named as the identified specialist laboratory for this programme; engagement is at the outreach and scoping stage and a written collaboration agreement must be executed before any submission names KEMRI as a contracted partner.
Institution
Programme role
Contact details
Kenya Medical Research Institute (KEMRI), Nairobi
Specialist laboratory partner: formulation and analytical bench access, characterisation and drug-development research support, scientific review through KEMRI research structures.
How findings will be communicated without compromising intellectual property or overstating evidence.
Dissemination will balance scientific transparency, public-interest responsibility and protection of legitimate intellectual property. Every output will pass through scientific, regulatory and IP review before release.
Confidential technical reports for LSLP CREST, funders and authorised research partners.
A non-confidential proof-of-concept summary describing the question, methods and bounded findings without enabling reproduction.
Stakeholder briefings for TB-programme, regulatory, manufacturing and patient representatives where relevant.
Peer-reviewed publication after protection decisions, partner review and removal of enabling details where necessary.
A controlled investor data room for qualified diligence under confidentiality protections.
A claims register linking each public statement to the evidence that supports it.
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PROOF-OF-CONCEPT PROPOSAL
Direct Response to the Funding Opportunity
A final compliance and value statement to customise for the selected call.
LSLP CREST proposes a bounded proof of concept that converts a scientifically plausible delivery hypothesis into a series of measurable decisions. Funding will not be used to market an assumed solution. It will be used to determine whether a reproducible candidate exists, whether its laboratory performance is meaningful, whether biological activity is retained and whether further nonclinical investment is justified.
Assessment question
Current response
Is the need important?
Yes. Treatment-associated toxicity and interruptions remain relevant challenges, while effective medicines already exist.
Is the innovation distinct?
Potentially. Distinction will reside in the protected formulation, process controls and performance package—not in ownership of an existing drug.
Is the work proof-of-concept appropriate?
Yes. The proposed work tests feasibility and performance before animal or human claims.
Is the programme locally led?
Yes. LSLP CREST leads the Kenyan development proposition; formal technical partners remain to be contracted.
Are outcomes measurable?
Yes. Reproducibility, release, stability, activity and translation readiness have defined evidence domains.
Can it scale?
Scale is plausible but unproven. The programme includes manufacturability, quality, regulatory, IP and cost gates.
What will funding unlock?
A lead-candidate decision and the evidence package required to justify or stop further development.
Submission completion checklist
Insert the funder and reproduce its criteria accurately.
Confirm duration, requested amount and co-financing assumptions.
Attach named team biographies and institutional evidence.
Secure partner letters and define scopes of work.
Complete literature references and source every quantitative claim.
Obtain regulatory, ethics, IP and quality review.
Approve a final confidential annex for authorised diligence only.
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PROOF-OF-CONCEPT PROPOSAL
Laboratory Delivery Protocol — Running the Trials at KEMRI
How each TB trial will be executed with the Kenya Medical Research Institute: responsibilities, sample flow, acceptance gates and data chain of custody.
This section describes, trial by trial, how the laboratory work will be executed once the partnership with the Kenya Medical Research Institute (KEMRI) is formalised. It is written so that a reviewer can see exactly who does what, in what order, and how the data produced at the bench reaches the institute for independent verification. KEMRI's Centre for Clinical Research houses the drug-development and formulation capability this programme requires; the institute is identified as the specialist laboratory partner, with contact established at director@kemri.go.ke and +254 722 205 901 / +254 709 295 300 (P.O. Box 54840-00200, Nairobi, off Raila Odinga Way).
19.1 Roles at the bench
Party
Responsibility in trial execution
LSLP CREST
Owns the formulation design space and optimiser, supplies materials and master protocols, records every reading in the bench logbook, and issues numbered data packs to KEMRI after each trial step
KEMRI — Centre for Clinical Research
Provides contracted bench and instrument access, independently re-measures an agreed subset of each batch, performs the mycobacterial activity and hepatocyte work under appropriate biosafety control, and countersigns the characterisation record
HENIKE Consultants Limited
Programme direction, monitoring and evaluation, procurement coordination and reporting to the funder
19.2 Standing trial routine
Every trial follows the same cycle regardless of scale, so a reviewer can trace any reported number back to a batch, an instrument and a dated entry.
Batch request and materials — LSLP CREST issues the batch protocol with quantities and settings; KEMRI confirms reagent inventory and instrument availability before the run is booked.
Formulation run at the contracted bench — The batch is prepared under a documented batch record; every reading is entered in the bench logbook at the time of measurement and raw traces are retained.
Characterisation — Particle size and PDI by dynamic light scattering, encapsulation by a validated HPLC method, and dissolution at pH 1.2 (stomach) and pH 7.4 (intestine).
Gate decision — Each batch is judged against the five acceptance gates — 150–220 nm, PDI ≤ 0.25, encapsulation above 80 %, less than 15 % released at 2 h, at least 85 % released at 24 h. Failed batches are recorded, not discarded.
Data pack submission — After each trial step, a numbered pack (reference format LSLP-TB0x-date-code) is submitted to KEMRI containing every batch reading and its pass/fail outcome, with a declaration that raw traces are held by LSLP CREST and available on request.
Independent verification — KEMRI re-measures an agreed subset of each batch and countersigns the characterisation record. Any discrepancy triggers a joint investigation before the next trial proceeds.
19.3 Acceptance gates used throughout
Every trial in this programme is judged against the same five gates. They are the identical thresholds enforced in the bench logbook, so a number recorded at the bench, a number in a data pack to KEMRI and a number in a funder report cannot diverge.
Critical quality attribute
Gate
Method
Instrument
Particle diameter (Z-average)
150 – 220 nm
Dynamic light scattering, 25 °C, 173° backscatter, triplicate, sample diluted in 0.22 µm-filtered deionised water
Malvern Zetasizer or equivalent DLS
Polydispersity index
≤ 0.25
Reported from the same DLS run as the cumulants fit
As above
Encapsulation efficiency
> 80 %
Ultracentrifugation or 10 kDa ultrafiltration to separate free drug; supernatant assayed by validated reverse-phase HPLC; EE = (total − free) / total
Refrigerated centrifuge + HPLC-UV/DAD
Gastric release at 2 h
< 15 %
USP Apparatus 2 (paddle), 900 mL simulated gastric fluid pH 1.2, 37 ± 0.5 °C, 50 rpm, sampling at 0.5/1/2 h with volume replacement
Dissolution tester + HPLC
Intestinal release at 24 h
≥ 85 %
Medium switched to phosphate buffer pH 7.4 (or 6.8 intestinal fluid) after the gastric stage; sampling at 4/6/8/12/18/24 h
As above
A batch that fails any gate is recorded as failed and carried forward in the data pack. Failed batches are evidence, not waste, and the programme reports them.
19.4 Equipment schedule
Equipment is split between what LSLP CREST expects to access under the KEMRI contract and what must be booked, hired or purchased. Availability is confirmed before each trial is booked.
Stability chambers at 25 °C/60 % RH and 40 °C/75 % RH
Accelerated and long-term stability
TB-03, TB-04
KEMRI; capacity to confirm
Freeze dryer (lyophiliser) with shelf control
Drying the nanosuspension to a stable powder
TB-04
To confirm or hire
Capsule filling equipment, size 0/1
Dosage-form translation
TB-04
To confirm or hire
BSL-3 containment suite and incubator
Antimycobacterial activity work
TB-03
KEMRI, under its own biosafety control
Cell culture suite, CO₂ incubator, plate reader
Hepatocyte viability endpoint
TB-03
KEMRI
19.5 Reagents and materials
Material
Grade / specification
Role
Used in
Zein (maize prolamin)
Pharmaceutical or high-purity grade, certificate of analysis on every lot
Hydrophobic matrix former
All trials
Chitosan, low molecular weight
Deacetylation degree stated on the certificate
Cationic shell, release control
All trials
Rifampicin reference standard
Pharmacopoeial standard for assay; protected from light and oxygen
Hydrophobic active
All trials
Isoniazid reference standard
Pharmacopoeial standard for assay
Hydrophilic active
TB-03, TB-04
Pyrazinamide (comparator arm)
Pharmacopoeial standard
Optional third-drug arm
TB-03
Ethanol, 70–90 % aqueous
Analytical grade
Zein solvent phase
All trials
Poloxamer 188 or Tween 80
Pharmaceutical grade
Stabiliser / surfactant, 0.1–2.0 % w/v
All trials
PEG-400
Pharmaceutical grade
Core–shell plasticiser arm
TB-03
Acetic acid, 1 % v/v
Analytical grade
Chitosan dissolution
All trials
Simulated gastric fluid pH 1.2 and phosphate buffer pH 7.4
Prepared to pharmacopoeial composition, pH verified before each run
Dissolution media
All trials
HPLC-grade acetonitrile, methanol, buffer salts
HPLC grade
Mobile phase
All trials
Benz-hydrazone (IH2) synthesis inputs
Synthesis grade, identity confirmed
Linker feasibility arm
TB-03
Mycobacterial strain and culture media
Supplied and held by KEMRI only
Activity assay
TB-03
Hepatocyte line and culture reagents
Supplied by KEMRI
Toxicity endpoint
TB-03
LSLP CREST supplies no live cultures. All biological material is sourced, held and destroyed by KEMRI under its own procedures.
19.6 Trial-by-trial method and timeline
Each trial below states the objective, the method as it will be performed at the bench, how long it takes and the decision that closes it. All five gates in 19.3 apply to every characterised batch.
TB-01 — Independent confirmation of the lead formulation
Element
Detail
Objective
Reproduce the documented C1 lead formulation at KEMRI and confirm the acceptance gates hold under independent measurement
Settings
Zein 12.76 mg/mL, drug:zein ratio 0.171, surfactant 1.15 % w/v, aqueous phase pH 6.59, stirring 1000–1200 rpm, 25–40 °C, chitosan shell 25–30 % of zein mass
Method
Dissolve zein in aqueous ethanol; dissolve rifampicin in the organic phase protected from light; prepare the aqueous anti-solvent with surfactant and adjust pH; inject the organic phase into the aqueous phase at controlled rate under stirring; add the chitosan solution for shell deposition; remove solvent under reduced pressure; characterise within 4 h of preparation
Batches
Three independent batches, each characterised in triplicate
Characterisation
DLS size and PDI; HPLC encapsulation; two-stage dissolution pH 1.2 then pH 7.4
Duration
4 weeks — week 1 materials and method transfer, weeks 2–3 batch runs, week 4 characterisation and data pack
Decision gate
All five gates met on at least two of three batches; otherwise the condition screen re-opens before TB-02 proceeds
TB-02 — Condition screen and lead selection
Element
Detail
Objective
Run the four-condition chitosan and drug-load screen at KEMRI's bench and confirm C1 as lead with reported variability
Design
Four arms varying chitosan shell (25 % and 30 % of zein mass) against drug load (0.120 and 0.150 drug:zein), three batches per arm, twelve batches total
Method
As TB-01, with only the screened variable changed per arm; all other parameters held and recorded in the batch record
Characterisation
Full gate panel on every batch; mean and standard deviation reported per arm
Duration
6 weeks — weeks 1–4 batch runs (three arms per week where instrument time allows), weeks 5–6 characterisation, statistics and data pack
Decision gate
One arm clears all five gates with a standard deviation small enough to be reproducible; that arm is carried into TB-03 as the confirmed lead
TB-03 — Reproducibility, dual drug and biology
Element
Detail
Objective
Establish that the lead reproduces, co-encapsulates both drugs, retains antibacterial activity and does not worsen liver-cell toxicity
Workstream A — reproducibility
Six independent batches at the confirmed lead settings, prepared on at least three separate days by at least two operators; full gate panel on each
Workstream B — dual drug
Isoniazid co-loaded by the core–shell route with PEG-400; each drug quantified separately by HPLC; release profiles reported per drug
Workstream C — shell retention
Shell integrity checked by zeta potential and by encapsulation retention after 2 h in pH 1.2 medium
Workstream D — IH2 linker arm
Benz-hydrazone linker prepared and characterised for identity, purity and recovery of active isoniazid on hydrolysis
Workstream E — stability
Three-month run at 25 °C/60 % RH and 40 °C/75 % RH with monthly size, PDI, encapsulation and assay
Workstream F — activity
Antimycobacterial assay against dose-matched free drug, with blank-particle controls, performed under KEMRI containment
Workstream G — hepatocyte endpoint
Viability comparison across co-loaded particles, the free-drug combination and the blank carrier
Duration
7 months — A and B in months 1–3, C and D in months 2–4, E running months 1–4 with readouts, F in months 4–5, G in months 5–6, month 7 consolidation and data pack
Decision gate
Every reproducibility batch above 80 % encapsulation within 150–220 nm; both drugs clear their gates; activity not materially worse than free drug; the measured liver-cell response reported whatever its direction
TB-04 — Scale-up and dosage-form translation
Element
Detail
Objective
Show the formulation survives a tenfold scale increase, drying, reconstitution and conversion into an administrable dosage form
Scale-up
500 mL batch — 5.950 g zein, 1.4875 g chitosan, 0.8925 g drug substance; impeller geometry and tip speed matched to the bench run and recorded
All five gates still met after scale-up, drying and reconstitution; content uniformity within specification; stability showing no material loss over three months
19.7 Data chain of custody
Every reading is entered in the bench logbook at the time of measurement, tagged with trial, batch label and notes.
Each submission to KEMRI carries a unique reference and the full pass/fail gate record; nothing is summarised away — failed batches ship too.
Raw instrument traces, weighing records and chromatograms remain with LSLP CREST and are available to KEMRI and the funder on request.
KEMRI's countersigned re-measurements become the reference values carried into the next milestone and into the funder's reports.
19.8 Quality, safety and compliance
Characterisation methods are validated at KEMRI before milestone M2 closes: a validated HPLC encapsulation assay, dissolution mass balance and stability-indicating methods.
Method validation covers specificity, linearity, accuracy, precision, limits of detection and quantification, and solution stability, with acceptance criteria agreed in advance.
Mycobacterial work is performed only in KEMRI's appropriately contained laboratories under its own biosafety procedures; LSLP CREST supplies no live cultures.
No clinical or safety claim is made before the hepatocyte endpoint is measured, and no result leaves the programme outside the agreed governance.
All work is documented to a good-laboratory-practice standard: batch records, instrument logs, calibration certificates, personnel training records and a controlled document register.
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PROOF-OF-CONCEPT PROPOSAL
Grant Request: Budget, Milestones and Funder Fit
The two-entity US–Kenya structure, the SBIR/STTR funding route, the costed ask, milestones and funder fit.
This section is the grant-seeking summary: what LSLP CREST is asking for, what the money buys, when each result lands, and why this programme is a credible fit for a tuberculosis research or product-development grant. Costs are indicative planning figures in US dollars, built from Kenyan laboratory rates, and will be replaced with quotation-backed numbers once the contracted facilities are named. The trial-by-trial laboratory delivery protocol with KEMRI is set out in Section 19.
20.1 The ask
LSLP CREST is structured as a two-entity programme. LSLP CREST Inc. is a registered United States company that owns the intellectual property and applies for funding. LSLP CREST Kenya is the implementation partner: it runs the bench programme and holds the regional manufacturing pathway. This structure was chosen deliberately — it makes the programme eligible for United States small-business innovation funding while keeping the scientific work, capacity building and eventual manufacturing in Kenya.
Item
Position
Requested amount
USD 485,000 (indicative programme cost; see funding route in 20.2)
Duration
24 months
Primary instrument
NIH SBIR/STTR — Phase I feasibility, then Phase II development
Alternate instruments
Proof-of-concept and seed grants open to US entities with international partners (e.g. Grand Challenges, Wellcome innovator awards)
Applicant
LSLP CREST Inc. (United States) — majority US-owned small business
Implementation partner
HENIKE Consultants Limited (Kenya) — programme direction, analysis and MEAL; specialist laboratory access identified with KEMRI, agreement to be executed before submission
Co-financing
Founder time, existing formulation engine and trial data (TB-01, TB-02) contributed in kind
Decision the grant funds
Whether a reproducible, dual-drug zein nanoparticle candidate exists that retains antibacterial activity and justifies nonclinical development
20.2 Corporate structure and funding route
Entity
Role in the programme
LSLP CREST Inc. (United States)
Registered US company, majority-owned by US citizen co-founder(s). Owns the intellectual property, applies for funding, contracts the science and holds regulatory strategy
LSLP CREST Kenya
Implementation partner: delivers programme direction, analysis and MEAL through HENIKE Consultants Limited (Wamweya, Fung, F. Lumumba) under a paid work contract, runs the bench programme at a contracted Kenyan facility, and holds the regional manufacturing and distribution pathway
The primary route is the NIH Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR) programme. These awards are open only to United States small business concerns — which is what LSLP CREST Inc. is. A Phase I award (approximately USD 300,000 over 6–12 months) funds the feasibility work covered by milestones M1–M3 below; a Phase II award (approximately USD 2 million over up to two years) funds the full nonclinical package, M4–M8. The USD 485,000 programme cost in this section therefore sits between a Phase I and a Phase II and can be financed either as a scoped Phase I with bridge funding, or from the alternate instruments listed in 20.1.
Work performed in Kenya is permitted under SBIR/STTR as subcontracted effort, and it must be disclosed. NIH's foreign disclosure and risk-management rules — tightened by the SBIR and Economic Security Act of April 2026 — require the applicant to identify every foreign entity performing substantive work, what that work is, and the data and intellectual-property arrangements. LSLP CREST discloses all of this openly: the Kenyan partner is named in the proposal, operates under a written contract, and does not hold the IP. This is a disclosure obligation, not a prohibition, and the structure above is designed to satisfy it.
Contracted bench and instrument time, containment-level access for mycobacterial work
58,000
12 %
Quality, regulatory and IP
Documentation, prior-art and freedom-to-operate review, patent filing, regulatory consultation
44,000
9 %
Manufacturing translation
Process mapping, local sourcing study, preliminary cost-of-goods model
24,000
5 %
Dissemination and governance
Advisory panel, reporting, publication and controlled stakeholder engagement
12,000
2 %
Contingency
Applied within funder rules against assay and sourcing risk
10,000
2 %
Total
485,000
100 %
Two-thirds of the request is laboratory work and the evidence it produces. No part of the budget funds marketing, and no claim of clinical benefit is financed before the toxicity endpoint is measured.
20.4 Milestones and timeline
Milestone
Months
Deliverable
Stage gate
M1 — Confirm the TB-02 lead
1 – 4
Six independent batches at the C1 settings with reported standard deviations, recovery and gate margins
Every batch above 80 % EE within 150–220 nm, else re-screen
M2 — Validated analytics
1 – 6
Validated HPLC encapsulation assay, dissolution mass balance and stability-indicating methods
Methods accepted by an independent reviewer
M3 — Dual-drug candidate
5 – 11
Rifampicin and isoniazid co-encapsulation by the core–shell route, each drug quantified separately
Both drugs clear the encapsulation and release gates
M4 — IH2 linker comparison
7 – 13
Feasibility arm on the benz-hydrazone linker route, including identity, purity and recovery of active isoniazid
Go or no-go on the linker route
M5 — Stability package
10 – 18
Six-month data at 25 °C/60 % RH and 40 °C/75 % RH
No material loss of size control, encapsulation or assay
M6 — Retained activity
13 – 19
Antimycobacterial assay against dose-matched free drug with blank-particle controls
Activity not materially worse than free drug
M7 — Hepatocyte endpoint
16 – 22
Toxicity comparison across co-loaded particles, free-drug combination and blank carrier
Measured liver-cell response reported, whatever the direction
M8 — Evidence package and decision
20 – 24
Lead-candidate dossier, cost-of-goods model, IP position and a recommendation to progress or stop
Funder-reviewable go / no-go
20.5 Why LSLP CREST fits a TB grant
What funders look for
What LSLP CREST brings
Work on a high-burden disease
Tuberculosis, with Kenya among the countries carrying a substantial share of the burden
An eligible applicant vehicle
A registered US small business — the applicant class the NIH SBIR/STTR programme is designed for
US–Kenya structure, not extraction
A US-owned programme whose direction, analysis and delivery sit with the registered Kenyan partner HENIKE Consultants Limited, led on the ground by a Kenyan founder
Repurposing over discovery risk
Uses established, approved medicines; the innovation is delivery, which removes new-molecule risk
Evidence already on the table
Two completed bench trials (TB-01, TB-02) with real numbers, including a documented failure and its correction
Measurable, time-bound outputs
Eight milestones with explicit numeric stage gates and a defined stop point
Affordability and access
A design space built from low-cost plant protein and locally sourceable inputs, with a cost-of-goods model in scope
Capacity building
Analytical method validation, quality documentation and trained formulation staff remain in Kenya after the grant
Proportionate claims
No hepatotoxicity or clinical benefit is claimed before it is measured
African-led innovation
Conceived in Kenya by a Kenyan founder and developed with Kenyan institutions — the profile that Africa-led innovation funds exist to support
A verifiable local supply chain
The carrier protein is extracted from maize, a Kenyan staple crop, with a local sourcing and extraction study in scope (Section 11)
20.6 What the funder receives
Quarterly technical reports with batch-level data, not summaries alone.
Access to the trial record behind every reported number, including failed batches.
An independent advisory review at milestones 3, 6 and 8.
A final evidence package sufficient for a third party to judge whether nonclinical development is justified.
Publication of the methods and outcomes, including negative results.