Download MendeleyDiscovery of RGT-018: A Potent, Selective, and Orally Bioavailable SOS1 Inhibitor for KRAS-Driven Cancers.
Xiao, F., Wang, K., Wang, X., Li, H., Hu, Z., Ren, X., Huang, W., Feng, T., Yao, L., Lin, J., Li, C., Zhang, Z., Mei, L., Zhu, X., Zhong, W., Xie, Z.(2024) Mol Cancer Ther 23: 1703-1716
- PubMed: 39087485
- DOI: https://doi.org/10.1158/1535-7163.MCT-24-0049
- Primary Citation of Related Structures:
8XJJ - PubMed Abstract:
KRAS is the most frequently dysregulated oncogene with high prevalence in NSCLC, colorectal cancer, and pancreatic cancer. FDA-approved sotorasib and adagrasib provide breakthrough therapies for cancer patients with KRASG12C mutation. However, there is still high unmet medical need for new agents targeting broader KRAS-driven tumors. An emerging and promising opportunity is to develop a pan KRAS inhibitor by suppressing the upstream protein SOS1. SOS1 is a key activator of KRAS and facilitates the conversion of GDP-bound KRAS state to GTP-bound KRAS state. Binding to its catalytic domain, small molecule SOS1 inhibitor has demonstrated the ability to suppress KRAS activation and cancer cell proliferation. RGT-018, a potent and selective SOS1 inhibitor, was identified with optimal drug-like properties. In vitro, RGT-018 blocked the interaction of KRAS:SOS1 with single digit nM potency and is highly selective against SOS2. RGT-018 inhibited KRAS signaling and the proliferation of a broad spectrum of KRAS-driven cancer cells as a single agent in vitro. Further enhanced anti-proliferation activity was observed when RGT-018 was combined with MEK, KRASG12C, EGFR or CDK4/6 inhibitors. Oral administration of RGT-018 inhibited tumor growth and suppressed KRAS signaling in tumor xenografts in vivo. Combination with MEK or KRASG12C inhibitors led to significant tumor regression. Furthermore, RGT-018 overcame the resistance to the approved KRASG12C inhibitors caused by clinically acquired KRAS mutations either as a single agent or in combination. RGT-018 displayed promising pharmacological properties for combination with targeted agents to treat a broader KRAS-driven patient population.
- Regor Therapeutics Group, Shanghai, China.
Organizational Affiliation:
