Nobel-connected startup Shasqi deepens J&J partnership on CAPAC platform

San Francisco-based oncology startup, Shasqi, announced an expansion of its research collaboration with Johnson & Johnson Enterprise Innovation. The partnership centers on Shasqi‘s CAPAC platform, which is an abbreviation for Click-Activated Protodrugs Against Cancer. The platform separates tumor-targeting from the actual drug payload with the aim of maximizing potency while minimizing toxic side effects. 

Shasqi’s CAPAC platform taps click chemistry for tumor targeting

CAPAC makes use of a two-part system: a tumor-targeting agent and a cancer therapeutic. When the protodrug locates the tumor’s targeting agent, click chemistry activates it. The technique joins two discrete molecular components much like a seat belt buckle. More precisely, the system makes use of a chemical reaction to precisely activate the cancer drug at the tumor location. 

The origins of Shasqi trace back to the research of its founder, Dr. José M. Mejía Oneto, who desc…

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Exploring future cancer therapies: Designing linkers to increase ADC efficacy and reduce toxicity

Copyright WuXi AppTec

Antibody-drug conjugates (ADCs) represent a significant paradigm shift in cancer treatment, marrying the precise target recognition of monoclonal antibodies with the potent cell-killing capabilities of cytotoxic agents. In contrast to traditional small-molecule therapies, ADCs are multifaceted structures with three distinct components — i.e., antibody, cytotoxic payload and a linker — each playing a crucial role in the drug’s operation and effectiveness.

Following administration, the antibody guides the payload to the tumor site, relying on the antibody’s ability to recognize and bind to cancer cell antigens. Once at the tumor site, the linker undergoes cleavage — through enzymatic action, changes in pH, exposure to light, iron or glutathione (GSH) or breakdown in lysosome — releasing the cytotoxic payload or payload-related metabolites to exert its lethal effect on the canc…

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