Resveratrol induces apoptosis MH7A human rheumatoid arthritis synovial cells in a sirtuin 1-dependent manner.

Resveratrol induces apoptosis MH7A human rheumatoid arthritis synovial cells in a sirtuin 1-dependent manner.
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DOI:
10.1007/s00296-010-1598-8
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发表时间:
2012-01
影响因子:
4
通讯作者:
Nishizaki, Tomoyuki
Nishizaki, Tomoyuki
中科院分区:
医学3区
文献类型:
--
作者:
Nakayama, Hiroshi;Yaguchi, Takahiro;Yoshiya, Shinichi;Nishizaki, Tomoyuki

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白藜芦醇是一种植物抗毒素,可降低 MH7A 细胞(一种人类类风湿性关节炎滑膜细胞系)的活力。在细胞凋亡测定中,白藜芦醇增加了 TUNEL 阳性细胞并刺激 H2A.X 磷酸化。白藜芦醇破坏 MH7A 细胞中的线粒体膜电位,并刺激细胞色素 c 从线粒体释放到细胞质。白藜芦醇激活 MH7A 细胞中的 caspase-3 和 caspase-9,但不激活 caspase-8。白藜芦醇上调NAD依赖性脱乙酰酶sirtuin 1 mRNA的表达并下调Bcl-XL mRNA的表达,并且sirtinol(sirtinol)(sirtinol)(sirtinol)可以阻止白藜芦醇诱导的MH7A细胞死亡、线粒体损伤和caspase-3/-9激活。本研究结果表明,白藜芦醇通过激活caspase-9和效应子来诱导MH7A细胞凋亡由于 Bcl-XL 表达减少,caspase-3 沿着线粒体破坏,允许细胞色素 c 以 Sirtuin 1 依赖性方式从线粒体释放到细胞质中。这表明白藜芦醇可以抑制滑膜细胞的增生,这是类风湿性关节炎的关键因素。
Resveratrol, a phytoalexin, reduced the viability of MH7A cells, a human rheumatoid arthritis synovial cell line. In the apoptosis assay, resveratrol increased TUNEL-positive cells and stimulated H2A.X phosphorylation. Resveratrol disrupted mitochondrial membrane potentials in MH7A cells and stimulated cytochrome c release from the mitochondria to the cytosol. Resveratrol activated caspase-3 and caspase-9 but not caspase-8 in MH7A cells. Resveratrol upregulated the expression of the NAD-dependent deacetylase sirtuin 1 mRNA and downregulated the expression of the Bcl-XL mRNA, and resveratrol-induced MH7A cell death, mitochondrial damage, and caspase-3/-9 activation were prevented by sirtinol, an inhibitor of sirtuin 1. The results of the present study show that resveratrol induces MH7A cell apoptosis by activating caspase-9 and the effector caspase-3 along mitochondrial disruption as a result of reduced Bcl-XL expression, allowing cytochrome c release from the mitochondria into the cytosol, in a sirtuin 1-dependent manner. This suggests that resveratrol could suppress hyperplasia of synovial cells, a critical factor of rheumatoid arthritis.
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