Details

Autor(en) / Beteiligte

• Sun, Chengliang
• He, Yuling
• Wang, Gefei
• Zhang, Guoyu
• Zhang, Yu
• Shen, Hao
• Hu, Lingrong
• Sun, Yanze
• Jiang, Binjian
• Wang, Xiao
• Yuan, Kai
• Min, Wenjian
• Wang, Liping
• Sun, Haopeng
• Xiao, Yibei
• Yang, Peng

Titel

Design, Synthesis, and Antitumor Activity Evaluation of Novel VISTA Small Molecule Inhibitors

Ist Teil von

• Journal of medicinal chemistry, 2024-03, Vol.67 (5), p.3590-3605

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2024

Quelle

MEDLINE

Beschreibungen/Notizen

• VISTA (V-domain Ig suppressor of T cell activation) is a novel immune checkpoint protein and represents a promising target for cancer immunotherapy. Here, we report the design, synthesis, and evaluation of a series of methoxy-pyrimidine-based VISTA small molecule inhibitors with potent antitumor activity. By employing molecular docking and microscale thermophoresis (MST) assay, we identified a lead compound A1 that binds to VISTA protein with high affinity and optimized its structure. A4 was then obtained, which exhibited the strongest binding ability to VISTA protein, with a K D value of 0.49 ± 0.20 μM. In vitro, A4 significantly activated peripheral blood mononuclear cells (PBMCs) induced the release of cytokines such as IFN-γ and enhanced the cytotoxicity of PBMCs against tumor cells. In vivo, A4 displayed potent antitumor activity and synergized with PD-L1 antibody to enhance the therapeutic effect against cancer. These results suggest that compound A4 is an effective VISTA small molecule inhibitor, providing a basis for the future development of VISTA-targeted drugs.