YH001 is a humanized anti-hCTLA-4 IgG1 mAb that relieves CTLA-4-mediated immunosuppression, and thereby enhances the T-cell-mediated antitumor immune response. Pre-clinical data have shown potent anti-cancer activity when combined with anti-PD-1 mAb.

YH001 was well tolerated up to 4 mg/kg dose levels when combined with toripalimab and has shown encouraging antitumor activity in patients with advanced solid tumors. Clinical trial information: NCT04357756.