血液がんの薬剤耐性を克服する強力なCDK9阻害剤を開発(Researchers Develop Potent CDK9 Inhibitor to Overcome Drug Resistance in Hematological Malignancies)

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2025-05-26 中国科学院(CAS)

血液がんの薬剤耐性を克服する強力なCDK9阻害剤を開発(Researchers Develop Potent CDK9 Inhibitor to Overcome Drug Resistance in Hematological Malignancies)
Novel compound IHMT-CDK9-24: Discovery and its potent antitumor activity in vitro and in vivo. (Image by SHI Chenliang)

中国科学院合肥物質科学研究院の劉慶松教授と劉静教授の研究チームは、血液がん治療における薬剤耐性の克服を目指し、新たなCDK9阻害剤「IHMT-CDK9-24」を開発しました。この化合物は、野生型CDK9(IC₅₀ = 1.2 nM)と薬剤耐性変異型L156F(IC₅₀ = 3.3 nM)双方に対して高い阻害活性を示し、がん細胞の生存シグナルを遮断してアポトーシスを誘導します。また、他のCDKに対する選択性も高く、さまざまな血液がん細胞株の増殖を効果的に抑制しました。マウスモデルにおけるin vivo試験でも、異なる遺伝的背景を持つ血液がんに対して強力な抗腫瘍効果が確認され、CDK9阻害療法における薬剤耐性克服の新たな戦略として期待されています。

<関連情報>

L156F変異体を克服する強力なCDK9阻害剤としての新規ジヒドロイソキノリノン誘導体の発見による血液悪性腫瘍の治療への応用 Discovery of a Novel Dihydroisoquinolinone Derivative as a Potent CDK9 Inhibitor Capable of Overcoming L156F Mutant for the Treatment of Hematologic Malignancies

Chenliang Shi,Yun Wu,Fengming Zou,Yuan Yuan,Chen Hu,Qingwang Liu,Chao Wu,Lijuan Shen,Aoli Wang,Wenchao Wang,Beilei Wang,Jing Liu,and Qingsong Liu
Journal of Medicinal Chemistry  Published: April 8, 2025
DOI:https://doi.org/10.1021/acs.jmedchem.4c02548

Abstract

Hematologic malignancies represent the most prevalent type of malignant cancers associated with significant morbidity and mortality rates. Given CDK9’s extensive crosstalk with various signaling pathways and its crucial role in maintaining stem cell phenotypes, it emerges as a promising therapeutic target for hematologic malignancies. Despite ongoing efforts, resistance remains a ubiquitous challenge and significant limitation in the management of these malignancies. Here, we discovered a novel potent and selective inhibitor (14) of both CDK9 wild-type and L156F mutant, which inhibited p-Ser2 RNA Pol II, cMYC, and MCL-1, ultimately triggering apoptosis of hematological cancer cells. In vitro studies further revealed that 14 could efficiently suppress the proliferation of a diverse range of hematological cancer cell lines. Additionally, the in vivo efficacies have been demonstrated in different genetic background hematologic cancer cell-derived mice models. Together, these findings highlight the promising potential of this novel CDK9 inhibitor in the treatment of hematological malignancies.

有機化学・薬学
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