HotSpot Therapeutics is a Boston biotech that drugs the regulatory pockets of proteins rather than their active sites; its oral CBL-B inhibitor HST-1011 releases a brake on T cells.
HotSpot Therapeutics targets natural regulatory hotspots, allosteric sites that control protein function, using its Smart Allostery platform. Its first clinical candidate HST-1011 is an oral allosteric inhibitor of the E3 ubiquitin ligase CBL-B, an intracellular checkpoint that limits T-cell and natural killer cell activation. HST-1011 is in a phase 1/2 trial alone and with cemiplimab in advanced solid tumours; the company also develops an IRF5 inhibitor for autoimmune disease.
HST-1011 is a small-molecule inhibitor from HotSpot Therapeutics, Inc, in registered phase 2 trials for metastatic cancer.