MRTX1719, an MTA-cooperative PRMT5 Inhibitor, Induces Cell Cycle Arrest and Synergizes With Oxaliplatin and Gemcitabine for Enhanced Anticancer Effects.

IF 1.6 4区 医学 Q4 ONCOLOGY
Toshihiro Soeta, Norihiko Sugisawa, Akihiro Yamamura, Naoki Tanaka, Hirofumi Imoto, Takahiro Tsuchiya, Takashi Aizawa, Koji Okamoto, Mari Kawamura, Fumito Saijo, Masamichi Mizuma, Shinobu Ohnuma, Takashi Kamei, Michiaki Unno
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引用次数: 0

Abstract

Background/aim: MRTX1719 is a novel protein arginine methyltransferase 5 (PRMT5) inhibitor that targets the PRMT5-5'-Methylthioadenosine (MTA) complex called MTA-cooperative PRMT5 inhibitor. MRTX1719 acts specifically on methylthioadenosine phosphorylase (MTAP)-deficient cancer cells; however, its mechanism of action remains unclear. This study aimed to clarify the effects of MRTX1719 on the cell cycle and its synergistic effects with other anticancer drugs.

Materials and methods: A cell cycle assay was conducted using fluorescence-activated cell sorting to examine the correlation between PRMT5 activity and cells in the G0/G1 phase. The synergistic effects of MRTX1719 and anticancer drugs were evaluated using the Combination Index (CI) and Bliss synergy score (BSS). The synergistic effect was also evaluated by knocking down the endogenous expression of MTAP in HCT116 cells with high MTAP expression.

Results: The cell cycle assay showed that the population of cells with reduced PRMT5 activity increased, and the administration of MRTX1719, an MTAP inhibitor, increased the population of cells in the G0/G1 phase. In the synergistic effect assay, oxaliplatin and gemcitabine demonstrated a CI <1 and a BSS >0, indicating a synergistic effect when administered alongside MRTX1719. MTAP knockdown also resulted in <1 in CI and >0 in BSS after the administration of oxaliplatin or gemcitabine with MRTX1719.

Conclusion: MRTX1719 reduces PRMT5 activity, leading to cell cycle arrest by increasing the proportion of cells in the G0/G1 phase. Moreover, MRTX1719 exhibits synergistic anticancer effects with oxaliplatin and gemcitabine in MTAP-deficient cancer cells.

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来源期刊
Anticancer research
Anticancer research 医学-肿瘤学
CiteScore
3.70
自引率
10.00%
发文量
566
审稿时长
2 months
期刊介绍: ANTICANCER RESEARCH is an independent international peer-reviewed journal devoted to the rapid publication of high quality original articles and reviews on all aspects of experimental and clinical oncology. Prompt evaluation of all submitted articles in confidence and rapid publication within 1-2 months of acceptance are guaranteed. ANTICANCER RESEARCH was established in 1981 and is published monthly (bimonthly until the end of 2008). Each annual volume contains twelve issues and index. Each issue may be divided into three parts (A: Reviews, B: Experimental studies, and C: Clinical and Epidemiological studies). Special issues, presenting the proceedings of meetings or groups of papers on topics of significant progress, will also be included in each volume. There is no limitation to the number of pages per issue.
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