Inhibition of human aldose reductase-like protein (AKR1B10) by α- and γ-mangostins, major components of pericarps of mangosteen.

Inhibition of human aldose reductase-like protein (AKR1B10) by α- and γ-mangostins, major components of pericarps of mangosteen.
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山竹果皮的主要成分 α- 和 γ-山竹素对人醛糖还原酶样蛋白 (AKR1B10) 的抑制作用。

DOI:
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发表时间:
2012
影响因子:
2
通讯作者:
A. Harã
A. Harã
中科院分区:
医学4区
文献类型:
--
作者:
M. Soda;S. Endo;T. Matsunaga;Haifeng Zhao;O. El;M. Iinuma;K. Yamamura;A. Harã

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醛酮还原酶(AKR)超家族的人类成员AKR 1B 10最近被鉴定为治疗几种类型癌症的诊断标志物和治疗靶点。在这项研究中,我们研究了五种氧杂蒽酮衍生物对AKR 1B 10的抑制作用,这些氧杂蒽酮衍生物是山竹果皮的成分,其中α-和γ-山竹素显示出潜在的抗癌特性。在5种氧杂蒽酮中,γ-mangostin是最有效的竞争性抑制剂(抑制常数,5.6 nM),但其7-甲氧基衍生物α-mangostin是第二有效的抑制剂(抑制常数,80 nM)。通过分子对接和定点突变分析,发现Phe 123、Trp 220、Val 301和Gln 303对γ-mangostin的紧密结合起重要作用,并推测α-mangostin的7-甲氧基通过改变抑制剂分子在酶底物结合位点的方向而削弱其抑制活性。
A human member of the aldo-keto reductase (AKR) superfamily, AKR1B10, was recently identified as both diagnostic marker and therapeutic target in the treatment of several types of cancer. In this study, we have examined AKR1B10 inhibition by five xanthone derivatives, components of pericarps of mangosteen, of which α- and γ-mangostins show potential anti-cancer properties. Among the five xanthones, γ-mangostin was found to be the most potent competitive inhibitor (inhibition constant, 5.6 nM), but its 7-methoxy derivative, α-mangostin, was the second potent inhibitor (inhibition constant, 80 nM). Molecular docking of the two mangostins in AKR1B10 and site-directed mutagenesis of the putative binding residues revealed that Phe123, Trp220, Val301 and Gln303 are important for the tight binding of γ-mangostin, and suggested that the 7-methoxy group of α-mangostin impairs the inhibitory potency by altering the orientation of the inhibitor molecule in the substrate-binding site of the enzyme.
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影响因子: 7.3
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