On July 4, 2025 HotSpot Therapeutics, Inc., a biotechnology company pioneering the discovery and development of oral, small molecule allosteric therapies targeting Smart Allostery platform-identified regulatory sites on proteins referred to as "natural hotspots," reported the presentation of preclinical data from the Company’s CARD11-BCL10-MALT1 (CBM) signalosome program at the European Society for Medical Oncology (ESMO) (Free ESMO Whitepaper) Gastrointestinal Cancers Congress 2025 (Press release, HotSpot Therapeutics, JUL 4, 2025, View Source [SID1234654250]).
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The CBM signalosome is a molecular hub that serves as a key regulator of multiple oncogenic pathways, including NFkB, JNK, mTORC1 and MYC. As such, the CBM signalosome serves as a critical regulator of tumor development and survival, particularly in KRAS-driven colorectal cancer (CRC), as well as other KRAS-driven cancers, including pancreatic and lung cancer. Leveraging the Company’s proprietary Smart Allostery platform, HotSpot has discovered small molecule CBM signalosome inhibitors that bind and inactivate the complex, with preclinical data demonstrating dose-dependent tumor inhibition and regression in multiple KRAS-driven tumor models.
"While KRAS activation is a prominent genetic feature of CRC, KRAS inhibitors do not yield deep or durable responses for the vast majority of CRC patients. For the first time, we have shown that KRASG12X CRC depends on the CBM signalosome for survival, supporting the significant potential of a CBM signalosome inhibitor to transform the treatment landscape of KRASG12C CRC, as well as additional KRAS-associated solid tumors," said Geraldine Harriman, Ph.D., Chief Scientific Officer of HotSpot Therapeutics. "Leveraging our Smart Allostery platform, we have developed potent inhibitors of the CBM signalosome complex, with robust in vitro and in vivo data demonstrating apoptosis and tumor growth inhibition and regression in KRASG12C CRC, providing support for the profound clinical potential of a CBM signalosome inhibitor."
The poster presentations describe the following data:
HotSpot’s CBM signalosome inhibitors demonstrated selectively induced potent apoptosis in KRASG12 CRC cell lines, outperforming KRAS, BCL2 and Bcl-xL inhibitors.
In combination with a KRAS inhibitor, HotSpot’s CBM signalosome inhibitor achieved complete suppression of downstream signaling in KRASG12X cell lines.
HotSpot’s CBM signalosome inhibitor demonstrated dose-dependent tumor inhibition or regression both alone and in combination with a KRAS inhibitor in multiple in vivo models.