On Dec. 2, 2025, the FDA released draft guidance that could reduce the use of nonhuman primates (NHPs) in preclinical testing of monoclonal antibodies. According to the guidance, which the FDA released for the purpose of soliciting comments, “In general, studies longer than 3 months in nonrodent species (e.g., NHPs, dogs, and mini-pigs) are not warranted to evaluate toxicities … when data from 3-month studies are supplemented with a weight-of-evidence (WoE) risk assessment.”

Abilita Therapeutics Inc. has developed a novel approach targeting CCR8 – ABT-863 – that works as a potent inverse agonist to block CCL1-dependent and basal receptor signaling.

Vectory Therapeutics BV has obtained IND clearance from the FDA for a phase I/II trial (PIONEER-ALS) of VTX-002, a first-in-class vectorized antibody targeting TDP-43 pathology in amyotrophic lateral sclerosis (ALS). VTX-002 delivers an engineered antibody designed to selectively target toxic species of TDP-43.