1. Academic Validation
  2. Discovery and Optimization of a Potent, Efficacious, and Brain-Penetrant Inhibitor of KRAS G12C

Discovery and Optimization of a Potent, Efficacious, and Brain-Penetrant Inhibitor of KRAS G12C

  • J Med Chem. 2026 Mar 12;69(5):5241-5258. doi: 10.1021/acs.jmedchem.5c02279.
Matthew L Landry 1 Sushant Malhotra 1 Maureen Beresini 1 Connie Chan 1 Emily Chan 1 Cecile C de la Cruz 1 Nicholas F Endres 1 Marie Evangelista 1 Amy Gustafson 1 Dennis Hu 1 Thomas Hunsaker 1 Peter Hsu 1 Yevgeniy Izrayelit 1 Hank La 1 Pablo Saenz-Lopez Larrocha 1 Qihui Lian 2 Mark Merchant 1 Jialin Mao 1 Rana Mroue 1 Angela Oh 1 Emile Plise 1 Cheng Shao 3 Michael Siu 1 John C Tran 1 Yanguang Wang 3 Weiru Wang 1 Binqing Wei 1 Susan Wong 1 Chun-Wan Yen 1 Yuhui Zhou 1 Hans E Purkey 1 Timothy P Heffron 1 Laurent Salphati 1
Affiliations

Affiliations

  • 1 Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States.
  • 2 Wuxi Apptec 288 Fu Te Zhong Lu, Wai Gaio Qiao Free Trade Zone, Shanghai 200131, P. R. China.
  • 3 Pharmaron-Beijing Co. Ltd., 6 Taihe Road, BDA, Beijing 100176, P. R. China.
Abstract

Mutant KRAS is highly prevalent in human Cancer and has been actively pursued as a target for drug discovery. Much progress has been made in drugging KRAS G12C, owing to the ability of inhibitors to covalently target its oncogenic cysteine mutation at codon 12. A number of KRAS G12C inhibitors have advanced to clinical development and are being investigated for the treatment of a variety of solid tumors. Notably, many patients with KRAS G12C-positive non-small cell lung Cancer develop brain metastases. Herein, we report the discovery and development of a brain-penetrant inhibitor of KRAS G12C using divarasib as a starting point. Optimization efforts focused on reducing molecular weight and topological polar surface area as well as shielding of hydrogen bond donors. In this manner, active transport by both P-gp and breast Cancer resistance protein (BCRP) was attenuated, and high exposure in rodent brain tissue was achieved.

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