Step Pharma's confidence in their drug's clean safety profile originated from studying a human population with a natural mutation in the CTPS1 gene. This real-world genetic data de-risked their therapeutic approach from the outset, guiding development towards a highly selective and safe inhibitor.
Step Pharma's synthetic lethality approach targets two redundant enzymes in the same pathway. Deleting one makes cancer cells entirely dependent on the other. This direct dependency is harder for biology to circumvent compared to approaches targeting different, interconnected pathways, creating a "cleaner" kill mechanism.
In the competitive oncology market, Step Pharma differentiates itself by highlighting its novel, "first-in-class" mechanism and excellent safety profile. This strategy attracts interest by focusing on a unique therapeutic opportunity and potential for combination therapies, rather than competing directly on incremental efficacy gains.