Suppr超能文献

辛伐他汀对不同相细胞膜组织和动力学的差异影响。

Differential effects of simvastatin on membrane organization and dynamics in varying phases.

机构信息

CSIR-Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad, 500 007, India.

CSIR-Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad, 500 007, India.

出版信息

Chem Phys Lipids. 2019 Dec;225:104831. doi: 10.1016/j.chemphyslip.2019.104831. Epub 2019 Sep 27.

Abstract

Simvastatin belongs to the statin family of cholesterol lowering drugs which act as competitive inhibitors of HMG-CoA reductase, the rate-determining enzyme in cholesterol biosynthesis pathway. Simvastatin is a semi-synthetic, highly lipophilic statin, and has several side effects. Since HMG-CoA reductase is localized in the endoplasmic reticulum, orally administered simvastatin needs to cross the cellular plasma membrane to be able to act on HMG-CoA reductase. With an overall goal of exploring the interaction of simvastatin with membranes, we examined the effect of simvastatin on the organization and dynamics in membranes of varying phase, in a depth-dependent manner. For this, we employed DPH and TMA-DPH, which represent fluorescent membrane probes localized at two different locations (depths) in the membrane. Analysis of fluorescence anisotropy and lifetime data of these depth-specific probes in membranes of varying phase (gel/fluid/liquid-ordered) showed that the maximum membrane disordering was observed in gel phase, while moderate effects were observed in liquid-ordered phase, with no significant change in membrane order in fluid phase membranes. We conclude that simvastatin induces change in membrane order in a depth-dependent and phase-specific manner. These results provide novel insight in the membrane interaction of simvastatin and could be crucial for understanding its pharmacological effect.

摘要

辛伐他汀属于他汀类降脂药物家族,作为 HMG-CoA 还原酶的竞争性抑制剂,HMG-CoA 还原酶是胆固醇生物合成途径中的限速酶。辛伐他汀是一种半合成的、高度亲脂性的他汀类药物,有几种副作用。由于 HMG-CoA 还原酶位于内质网中,口服给予的辛伐他汀需要穿过细胞膜才能作用于 HMG-CoA 还原酶。为了探索辛伐他汀与膜的相互作用,我们以深度依赖的方式研究了辛伐他汀对不同相(凝胶/流体/液晶有序)中膜的组织和动力学的影响。为此,我们使用了 DPH 和 TMA-DPH,它们代表位于膜中两个不同位置(深度)的荧光膜探针。对这些深度特异性探针在不同相(凝胶/流体/液晶有序)的膜中的荧光各向异性和寿命数据的分析表明,在凝胶相中观察到最大的膜无序性,而在液晶有序相中观察到适度的影响,在流体相中膜的无序性没有显著变化。我们得出结论,辛伐他汀以深度依赖和相特异性的方式诱导膜有序性的变化。这些结果为辛伐他汀的膜相互作用提供了新的见解,对于理解其药理学效应可能至关重要。

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验