Selective small-chemical inhibitors of protein arginine methyltransferase 5 with anti-lung cancer activity.

Selective small-chemical inhibitors of protein arginine methyltransferase 5 with anti-lung cancer activity.
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DOI:
10.1371/journal.pone.0181601
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发表时间:
2017
期刊:
影响因子:
3.7
通讯作者:
Wang Z
Wang Z
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Kong GM;Yu M;Gu Z;Chen Z;Xu RM;O'Bryant D;Wang Z

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蛋白质精氨酸甲基转移酶5(PRMT5)在包括肿瘤发生在内的多种生物学过程中起着关键作用。通过筛选小分子化合物库,我们确定了8种选择性抑制PRMT 5酶活性的化合物,IC 50值范围为0.1至6 μM。分子对接模拟和定点突变表明,所确定的化合物的目标PRMT5中的底物结合位点。用鉴定的抑制剂治疗肺癌细胞导致SmD3和组蛋白的对称精氨酸甲基化和细胞增殖的抑制。在肺肿瘤异种移植模型中,经口给予抑制剂显示出抗肿瘤活性。因此,鉴定的PRMT5特异性小分子抑制剂将有助于阐明PRMT5的生物学作用,并作为未来药物开发的先导化合物。
Protein arginine methyltransferase 5 (PRMT5) plays critical roles in a wide variety of biological processes, including tumorigenesis. By screening a library of small chemical compounds, we identified eight compounds that selectively inhibit the PRMT5 enzymatic activity, with IC50 values ranging from 0.1 to 6 μM. Molecular docking simulation and site-directed mutagenesis indicated that identified compounds target the substrate-binding site in PRMT5. Treatment of lung cancer cells with identified inhibitors led to inhibition of the symmetrical arginine methylation of SmD3 and histones and the cellular proliferation. Oral administration of the inhibitor demonstrated antitumor activity in a lung tumor xenograft model. Thus, identified PRMT5-specific small-molecule inhibitors would help elucidate the biological roles of PRMT5 and serve as lead compounds for future drug development.
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