DHX9 inhibitor and pharmaceutical use thereof

By synthesizing DHX9 inhibitor compounds, the problem of selective inhibition of tumors with BRCA loss of function and mismatch repair defects in existing technologies has been solved, achieving effective treatment of a variety of tumors and enhancing immunotherapy.

WO2026145571A1PCT designated stage Publication Date: 2026-07-09SHANGHAI JEMINCARE PHARMACEUTICALS CO LTD

Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
SHANGHAI JEMINCARE PHARMACEUTICALS CO LTD
Filing Date
2025-12-30
Publication Date
2026-07-09

AI Technical Summary

Technical Problem

Current technologies have not effectively utilized DHX9 as a target for tumor therapy, especially in tumors with BRCA loss of function and mismatch repair defects, where the lack of selective inhibitors leads to limited therapeutic effects.

Method used

A class of DHX9 inhibitor compounds were designed and synthesized. Through the combination of specific structural units, they selectively inhibit the activity of DHX9, interfere with its function in tumor cells, induce S-phase arrest and apoptosis, enhance the immunogenic tumor microenvironment, and enhance the response to ICB therapy.

Benefits of technology

It achieves selective inhibition of various tumors such as BRCA-mutated breast cancer, ovarian cancer, and colorectal cancer, reduces tumor growth, enhances the effect of immunotherapy, and has no significant toxicity to normal cells.

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Abstract

Provided are a DHX9 inhibitor, and a preparation method therefor and a pharmaceutical use thereof. Specifically, provided are a compound represented by formula (I), an optical isomer thereof or a pharmaceutically acceptable salt thereof, and a use thereof as a DHX9 inhibitor, etc.
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