The plan is to produce novel and defensible IP by the end of the project, filing patents for 3 groups of NCEs with each a distinct PKPD and target indication space: - First Group: Brain penetrant DRP1-FIS1 inhibitors, compositions and uses thereof. - Second Group: Orally available and BBB restricted DRP1-FIS1 inhibitors for systemic indications, compositions and uses thereof. - Third Group: Low penetrance DRP1-FIS1 inhibitors for gut and eye restricted delivery, compositions and uses thereof. In order to accomplish this, the research team will conduct a series of experiments (detailed in Phase 1: Milestones 1 and 2, and Phase 2) in order to get to lead series selection. The top compounds will be further optimized until a lead compound is selected for IND enabling studies.
The plan is to produce novel and defensible IP by the end of the project, filing patents for 3 groups of NCEs with each a distinct PKPD and target indication space:
First Group: Brain penetrant DRP1-FIS1 inhibitors, compositions and uses thereof.
Second Group: Orally available and BBB restricted DRP1-FIS1 inhibitors for systemic indications, compositions and uses thereof.
Third Group: Low penetrance DRP1-FIS1 inhibitors for gut and eye restricted delivery, compositions and uses thereof.
In order to accomplish this, the research team will conduct a series of experiments (detailed in Phase 1: Milestones 1 and 2, and Phase 2) in order to get to lead series selection. The top compounds will be further optimized until a lead compound is selected for IND enabling studies.
Owner
Time | Type | $MITY | USD | ETH | From |
|---|---|---|---|---|---|
Fission Bio scores 3.50/5.00, placing it in the moderate-to-good range for a TRL 3 project. The program's greatest strengths lie in its therapeutic optionality (broad disease applicability across CNS, cardiovascular, GI, and inflammatory conditions) and the strong biological rationale supported by 13 years of P110 peptide validation across 11 disease models with publications in high-impact journals. The safety profile is conceptually favorable due to the selective mechanism that preserves normal mitochondrial dynamics without immunosuppression.
Key risks and weaknesses center on the early stage of the small molecule program: while the peptide P110 is well-validated, the actual drug candidates are still in hit identification/early optimization with no lead compound yet selected. SC9 confirmed druggability but lacks brain penetration for the primary CNS indications. The 15 confirmed hits from the 48-billion-compound virtual screen need significant optimization (currently targeting sub-10 µM potency). IP is strategically planned but no composition of matter patents have been filed, and the published SWAG site discovery may limit target-level exclusivity. The team is scientifically strong but lean, and total funding (~$400K with ~$85K disbursed) is modest for a drug discovery program of this scope.
The path forward is clear but long: compound synthesis and screening (Nov 2025), hit-to-lead optimization and IP filings (Q1 2026), in vivo validation (mid-2026), followed by lead optimization, safety profiling, and IND-enabling studies. The ALS orphan drug strategy is sensible for regulatory efficiency. Success in the near-term milestones—particularly demonstrating brain-penetrant compounds with in vivo efficacy—will be critical inflection points that could significantly increase the project's score across multiple criteria.
Therapeutic Relevance
Strong therapeutic relevance with 13 years of validation across 11 disease models. The Drp1-Fis1 mechanism is well-established in peer-reviewed literature (Nature Communications, JCI, EMBO Mol Med) as a driver of mitochondrial dysfunction in neurodegeneration. The selectivity of targeting pathological fission (via Fis1) while preserving normal dynamics (via Mff/MiD49/MiD51) is compelling. However, the transition from validated peptide (P110) to small molecules is still early, and the causal vs. correlative role of mitochondrial fission in disease progression remains debated. Score of 4 reflects strong but not yet fully de-risked mechanistic validation.
Therapeutic Optionality
Exceptional optionality. The 'pipeline-in-a-pill' strategy is well-supported by preclinical data across CNS (Alzheimer's, ALS, Huntington's, Parkinson's, MS), cardiovascular (heart failure, pulmonary hypertension), GI (IBD), stroke, and sepsis. The platform strategy with three compound classes (brain-penetrant, peripheral, tissue-restricted) further expands addressable indications. The DRP1-FIS1 mechanism appears to be a fundamental inflammatory/mitochondrial pathway with broad disease relevance. This is one of the project's strongest attributes.
Intellectual Property
IP strategy is planned but not yet executed. IP-NFT has been minted and composition of matter patents are planned for novel DRP1-FIS1 inhibitor scaffolds post hit-to-lead optimization (Q1 2026). Clean freedom-to-operate with de novo chemical scaffolds is a positive. However, no composition of matter patents have been filed yet, and the core SWAG binding site discovery is published (Rios et al., 2023 Nature Communications), which could limit exclusivity around the target. The three-class IP strategy (CNS, peripheral, tissue-restricted) is thoughtful but aspirational at this stage. Score of 3 reflects a reasonable plan with clean FTO but no granted or filed patents on novel compounds yet.
Utility Of Candidates
Mixed picture. The P110 peptide has robust efficacy across 11 disease models, and SC9 shows comparable in vitro and in vivo activity, confirming druggability. However, SC9 itself lacks sufficient brain penetration for the primary CNS indications. The program is now developing third-generation compounds: 48 billion compounds screened virtually, 15 confirmed active hits with IC50 values in target range but still optimizing toward sub-10 µM potency. No lead compound has been selected yet, and in vivo validation of new compounds is planned for mid-2026. The candidates are at a very early stage—active hits but not yet optimized leads with demonstrated in vivo efficacy in disease models. Score of 3 reflects confirmed target engagement and active hits but no lead candidate with the required drug properties (especially brain penetration) demonstrated.
Prospects For Safety
The safety profile is conceptually favorable. The mechanism selectively blocks pathological Drp1-Fis1 interaction without disrupting normal mitochondrial dynamics (via Mff/MiD49/MiD51), and P110 demonstrated therapeutic benefits without immunosuppression—a significant advantage over anti-inflammatory approaches. P110 has been used across 11 animal models with no reported toxicity concerns in published literature. However, no formal safety/toxicology studies have been conducted on the new small molecule candidates, and small molecules may have off-target effects not seen with the peptide. Score of 4 reflects a mechanistically clean safety rationale supported by extensive peptide data, tempered by the absence of formal tox studies on new chemical matter.
Prospects For Gmp Cmc
The transition from peptide to small molecule inherently improves manufacturability—chemical synthesis is more scalable and cost-effective than biological peptide production. The team is working with Pharmaron as a CRO partner, which is a reputable organization for CMC support. However, no lead compound has been selected yet, so GMP process development has not begun. Manufacturing challenges are unknown until chemical structures are finalized. At TRL 3, this is expected, but the lack of a defined lead compound means CMC planning is entirely prospective. Score of 3 reflects the inherent advantage of small molecules and CRO partnership, balanced against the very early stage with no defined manufacturing process.
Prospects For Clinical Development
The regulatory strategy is reasonable: ALS as lead indication for orphan drug designation provides a faster path with smaller trials and regulatory incentives. Standard FDA IND pathway is planned. However, the program is far from clinical development—no lead compound selected, no IND-enabling studies initiated, and in vivo validation in disease models is not expected until mid-2026. The timeline to IND filing is likely 3+ years away. The team has identified clear next steps (hit-to-lead → lead optimization → safety → PK → disease model validation → IND-enabling studies), but significant work remains. Score of 3 reflects a sound strategic plan with appropriate regulatory thinking but very early stage with a long path to clinic.
Commercial Potential
Large addressable market: ALS (>200K patients worldwide, orphan drug potential), broader neurodegenerative market (>$200B globally), plus cardiovascular, GI, and inflammatory conditions. The mechanism is differentiated from NLRP3 inflammasome inhibitors and other anti-inflammatory approaches. Comparable transactions are impressive (IFM Therapeutics $2.8B acquisition by BMS, Ventyx $2.1B IPO). The 'pipeline-in-a-pill' strategy could be attractive for partnering or acquisition. However, the neurodegenerative space is highly competitive with many failures, and the program is very early stage, making commercial projections speculative. Score of 4 reflects strong market opportunity and differentiated positioning, tempered by competitive landscape risks.
Organization And Team Fit
The team includes Dr. Luis Rios as PI with deep expertise in the target (first-author Nature Communications 2023, discoverer of SWAG binding site), Dr. Peter Groenen as translational neuroscience advisor, and Dr. Maryna Polyakova as project manager. Pharmaron serves as CRO partner. However, the team appears small for the scope of ambition, and the decentralized DAO funding model, while innovative, introduces governance complexity. Only $84,508 of $200K has been disbursed, and total funding of ~$400K is modest for drug discovery. Key gaps may exist in medicinal chemistry leadership, regulatory affairs, and clinical development expertise. The Cerebrum DAO model is novel but unproven for advancing drugs through development. Score of 3 reflects strong scientific leadership but a lean team with limited resources relative to the program's ambitions.