Nonsteroidal anti-inflammatory drug naproxen destabilizes Aβ amyloid fibrils: a molecular dynamics investigation.

Nonsteroidal anti-inflammatory drug naproxen destabilizes Aβ amyloid fibrils: a molecular dynamics investigation.
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非甾体类抗炎药萘普生破坏了Aβ淀粉样蛋白原纤维:一种分子动力学研究。

DOI:
10.1021/jp107955v
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发表时间:
2010-11-25
影响因子:
3.3
通讯作者:
Klimov, Dmitri K.
Klimov, Dmitri K.
中科院分区:
化学3区
文献类型:
--
作者:
Takeda, Takako;Kumar, Rashmi;Raman, E. Prabhu;Klimov, Dmitri K.

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使用隐式溶剂模型和复制品交换分子动力学,我们研究了非甾体抗炎药萘普生干扰 Aβ 原纤维生长的倾向。我们还比较了萘普生与布洛芬的抗聚集倾向。萘普生的抗聚集作用受两个因素影响。与布洛芬类似,由于配体和肽之间直接竞争原纤维表面(边缘)上的相同结合位置,萘普生会破坏传入的 Aβ 肽与原纤维的结合稳定性。然而,与布洛芬相反,萘普生结合还通过促进 β 结构来改变 Aβ 单体的构象整体。第二个因素削弱了萘普生的抗聚集作用。这些发现似乎解释了实验观察结果,即萘普生与 Aβ 原纤维的结合亲和力高于布洛芬,但产生的抗聚集作用较弱。
Using implicit solvent model and replica exchange molecular dynamics we examine the propensity of non-steroidal anti-inflammatory drug, naproxen, to interfere with Aβ fibril growth. We also compare the anti-aggregation propensity of naproxen with that of ibuprofen. Naproxen anti-aggregation effect is influenced by two factors. Similar to ibuprofen, naproxen destabilizes binding of incoming Aβ peptides to the fibril due to direct competition between the ligands and the peptides for the same binding location on the fibril surface (the edge). However, in contrast to ibuprofen naproxen binding also alters the conformational ensemble of Aβ monomers by promoting β-structure. The second factor weakens naproxen anti-aggregation effect. These findings appear to explain the experimental observations, according to which naproxen binds to Aβ fibril with higher affinity than ibuprofen, yet produces weaker anti-aggregation action.
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