Mechanisms of transthyretin cardiomyocyte toxicity inhibition by resveratrol analogs.

Mechanisms of transthyretin cardiomyocyte toxicity inhibition by resveratrol analogs.
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DOI:
10.1016/j.bbrc.2011.04.133
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发表时间:
2011-07-15
影响因子:
3.1
通讯作者:
Reixach, Natalia
Reixach, Natalia
中科院分区:
生物学4区
文献类型:
--
作者:
Bourgault, Steve;Choi, Sungwook;Buxbaum, Joel N.;Kelly, Jeffery W.;Price, Joshua L.;Reixach, Natalia

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转甲状腺四聚体淀粉样变性是一种蛋白质错误折叠疾病,其特征是外周神经和心脏中的血浆同源四聚体蛋白转甲状腺蛋白(TTR2)在细胞外沉积。我们已经建立了一个强大的与疾病相关的人类心脏组织培养系统,以探索淀粉样变性TTR变异体的细胞毒性效应。我们利用这种心脏淀粉样变性组织培养模型筛选了23个白藜芦醇类似物作为淀粉样变性TTR诱导的细胞毒性的抑制剂,并探讨了它们的保护机制。白藜芦醇及其类似物能动态稳定天然四聚体,防止细胞毒性物质的形成。此外,我们证明了白藜芦醇可以加速可溶性无毒聚集体的形成,并且被测试的白藜芦醇类似物可以将单体TTR亚单位聚集在一起形成无毒的天然四聚体TTR.
The transthyretin amyloidoses are a subset of protein misfolding diseases characterized by the extracellular deposition of aggregates derived from the plasma homotetrameric protein transthyretin (TTR2) in peripheral nerves and the heart. We have established a robust disease-relevant human cardiac tissue culture system to explore the cytotoxic effects of amyloidogenic TTR variants. We have employed this cardiac amyloidosis tissue culture model to screen 23 resveratrol analogs as inhibitors of amyloidogenic TTR-induced cytotoxicity and to investigate their mechanisms of protection. Resveratrol and its analogs kinetically stabilize the native tetramer preventing the formation of cytotoxic species. In addition, we demonstrate that resveratrol can accelerate the formation of soluble non-toxic aggregates and that the resveratrol analogs tested can bring together monomeric TTR subunits to form non-toxic native tetrameric TTR.
DOI: 10.1021/bi101822y
发表时间: 2011-02-15
期刊: Biochemistry
影响因子: 2.9
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影响因子: 11.1
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