Cell Death Dis:荜茇酰胺,银屑病的潜在治疗选择!

2020-02-09 QQY MedSci原创

银屑病是一种自身免疫性皮肤病;放大的细胞因子信号、异常分化及角质细胞凋亡缺陷所引起的慢性免疫应答反应,在介导角化细胞异常增生中起重要作用。从治疗的角度来看,具有强抗增殖和抗炎特性的分子或可取得一定疗效。本研究发现荜茇酰胺(Piperlongumine,PPL)处理可以通过诱导ROS介导的晚期细胞凋亡及线粒体膜电位的丧失来有效消除角质细胞的过度增殖及分化。此外,研究人员发现由于DNA断裂,细胞周期停

银屑病是一种自身免疫性皮肤病;放大的细胞因子信号、异常分化及角质细胞凋亡缺陷所引起的慢性免疫应答反应,在介导角化细胞异常增生中起重要作用。

从治疗的角度来看,具有强抗增殖和抗炎特性的分子或可取得一定疗效。

本研究发现荜茇酰胺(Piperlongumine,PPL)处理可以通过诱导ROS介导的晚期细胞凋亡及线粒体膜电位的丧失来有效消除角质细胞的过度增殖及分化。此外,研究人员发现由于DNA断裂,细胞周期停滞在Sub-G1期。

在分子水平上,研究人员观察到,STAT3及Akt信号抑制,伴随增殖标记物(如PCNA、ki67和Cyclin D1)减少及抗凋亡Bcl-2蛋白表达下降。

角蛋白17是角质细胞分化的关键调节因子,且研究发现其能够被PPL显著下调。此外,通过抑制脂多糖(LPS)/咪喹莫特(IMQ)诱导的p65 NF-κB信号级联反应可获得显著的抗炎作用,并可明显抑制涉及银屑病样皮肤炎症的细胞因子风暴的产生,进而减少了表皮的增生及脾肿大,最终恢复成正常的表皮结构。

在表观遗传研究上,PPL抑制了组蛋白修饰酶,包括I类(HDAC1-4)和II类(HDAC6)组蛋白脱乙酰基酶(HDAC)。

此外,研究结果表明,PPL能够有效的抑制p65及组蛋白调节因子HDAC3的核转运,导致它们游离在巨噬细胞的细胞质中无法入核。

Co-IP和分子模拟结果显示,PPL还能够有效的增强HDAC3及p65与IκBα的蛋白质相互作用,而该相互作用会被LPS刺激破坏。

总而言之,荜茇酰胺可以作为抗增殖及抗炎药,并且可以作为银屑病的潜在治疗选择。

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    2020-04-14 维他命
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    2020-02-11 cy0328

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