Plos One:抗纤维化治疗的新型药物靶点!

2017-10-26 MedSci MedSci原创

硬皮病具有一定的临床特征,包括皮肤和其他组织纤维化,但目前抗纤维化的治疗尚不充分。卤夫酮(Halofuginone,HF)是目前临床前和临床研究中众所周知的抗纤维化药物,它可以通过抑制TGF-/Smad3信号通路发挥作用。最近,有研究表明脯氨酰-tRNA合成酶(PRS)是HF的靶蛋白,其可以与PRS的催化结构域的脯氨酸结合位点结合。近期,一项发表在杂志Plos One的研究描述了一类新的PRS抑制

硬皮病具有一定的临床特征,包括皮肤和其他组织纤维化,但目前抗纤维化的治疗尚不充分。


卤夫酮(Halofuginone,HF)是目前临床前和临床研究中众所周知的抗纤维化药物,它可以通过抑制TGF-/Smad3信号通路发挥作用。

最近,有研究表明脯氨酰-tRNA合成酶(PRS)是HF的靶蛋白,其可以与PRS的催化结构域的脯氨酸结合位点结合。

近期,一项发表在杂志Plos One的研究描述了一类新的PRS抑制剂(T-3833261),其以与催化结构域的ATP位点结合并且不破坏脯氨酸结合的方式进行精心设计。

将T-3833261对TGF-β诱导的纤维化测定的抗纤维化活性和作用机制与原代人皮肤成纤维细胞中的HF的作用进行比较。研究评估了T-3833261和HF局部应用对小鼠TGF-β诱导的纤维化基因表达的体内作用。

此项研究发现T-3833261以与HF类似的方式通过Smad3轴抑制TGF-β诱导的α-平滑肌肌动蛋白(α-SMA)和I型胶原α1(COL1A1)表达。通过皮内注射到小鼠的耳朵,T-3833261可以通过TGF-β减少纤维化基因表达如α-Sma,Col1a1和Col1a2的增加。此外,还发现T-3833261在高脯氨酸浓度的条件下,比HF在纤维组织中更有效。

此项研究结果表明:ATP竞争性PRS抑制剂在治疗纤维化疾病如硬皮病中具有一定的潜力。

原始出处:
Shibata A, Kuno M, et al. Discovery and pharmacological characterization of a new class of prolyl-tRNA synthetase inhibitor for anti-fibrosis therapy. PLoS One. 2017 Oct 24;12(10):e0186587. doi: 10.1371/journal.pone.0186587. eCollection 2017.

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    2017-10-28 xugc
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