VISTA Agonist

M351-0056 is an orally active VISTA agonist with a K_d value of 12.60 μM. M351-0056 inhibits the activation of the JAK2-STAT2 pathway, reduces the phosphorylation levels of JAK2 and STAT2, and regulates type I interferon (IFN-I) and non-canonical NF-κB pathways. M351-0056 decreases the levels of cytokines (IFN-γ, IL-17A, TNF-α, IL-2 and IL-1β). M351-0056 improves imiquimod (HY-B0180)-induced psoriasis-like skin inflammation, reduces autoantibody levels, kidney damage and immune cell expansion in mice susceptible to chronic graft-versus-host disease and lupus, and delays the progression of systemic lupus erythematosus. M351-0056 can be used in research related to psoriasis-like dermatitis and systemic lupus erythematosus.

HMBD-002 is an Fc-independent, non-depleting IgG4 subclass antibody that targets VISTA and VSIG3. It is widely used in research related to various solid tumors, including colon cancer, triple-negative breast cancer, and non-small cell lung cancer. HMBD-002 blocks the interactions of VISTA with VSIG3 and LRIG1, relieves immunosuppression without depleting VISTA-positive cells, activates the cytotoxic program of CD8⁺ T cells, and drives the type I interferon signaling pathway. HMBD-002 reprograms tumor-associated macrophages to the M1 phenotype, reduces tumor infiltration of inhibitory myeloid cells, thereby significantly inhibiting tumor growth and improving survival. HMBD-002 is well tolerated in rodent and non-human primate animal models.