Bolt Bio goes bust as investors boo single response in early test against HER2-expressing tumors
Bolt Bio’s BDC-1001, an antibody conjugate drug designed to amp up the body’s innate immune system response to tumors, posted a single partial response in a Phase I/II study in patients with HER2-expressing solid tumors after a year of dosing. Just 13 of 40 evaluable patients showed any signs of “clinical activity,” the biotech said Monday.
BDC-1001 links a HER2-targeting biosimilar of Herceptin with a TLR7/8 agonist, which is designed to activate myeloid cells in the innate immune system and drive tumor cytotoxicity, Bolt said. But the early results paint the picture of a drug with little effect on HER2 tumors, one of the most highly validated tumor targets in drug development.
Keep reading Endpoints with a free subscription
Unlock this story instantly and join 157,500+ biopharma pros reading Endpoints daily — and it's free.