德国科学家在人体血液中发现一种缩氨酸,试验发现它可以阻止艾滋病病毒附着、侵入人体细胞。这一发现为抗艾滋病药物的开发提供了新途径。
据德新社近日报道,德国乌尔姆大学研究人员对人体血液中的大量成分进行分析筛选,最终找到了这种缩氨酸。研究人员将它命名为病毒抑制缩氨酸VIRIP。VIRIP可以干扰艾滋病病毒HIV-1型病毒的表面蛋白GP41,使其不能发挥作用,从而阻止HIV-1病毒附着到人体细胞上。
对于VIRIP的动物试验目前已经基本完成,研究人员希望今年能够开始人体试验。有关研究成果刊登在最新一期《细胞》杂志上。
一项新的研究确定出了人类血液中能够有效抑制引发艾滋病的HIV-1病毒的一种天然成分。这种HIV-1抑制银子可能在HIV向艾滋病发作过渡过程中起到一定的作用,而且它的作用方式与现有的抗病毒抑制剂都不同,因此可能导致人们开发出新型的抗艾滋病药物。这项研究的结果发表在4月20日的Cell杂志上。
德国Ulm大学的这个研究队伍发现,比较丰富的一种血液分子片段(他们命名为VIRUS-INHIBITORY PEPTIDE,病毒抑制肽,缩写VIRIP)能够充当广泛的HIV-1抑制剂。而且,他们还证实这种片段中一些氨基酸的变化能够将它的抗病毒能力提升两个数量级。
VIRIP和它的衍生物还能有效抵抗药物康熙HIV株,并因此使它们具有高的临床开发潜力。
研究人员评价说,这些发现揭示出了抑制HIV病毒的一个新靶标,因此是一个重大的进展。这个研究组还进一步证实HIV-1很难对这种肽片段产生抗性,至少在培养的细胞中是这样。而且他们的同事还发现初步的证据显示一些肽衍生物在人类血清中稳定性很高,并且在很高的浓度下也无毒。
原始出处:
Copyright © 2007 Cell Press. All rights reserved.
Cell, Vol 129, 263-275, 20 April 2007
Article
Discovery and Optimization of a Natural HIV-1 Entry Inhibitor Targeting the gp41 Fusion Peptide
Jan Münch,1,9 Ludger Ständker,2,8,9 Knut Adermann,3,8 Axel Schulz,2 Michael Schindler,1 Raghavan Chinnadurai,1 Stefan Pöhlmann,4 Chawaree Chaipan,4 Thorsten Biet,5 Thomas Peters,5 Bernd Meyer,6 Dennis Wilhelm,6 Hong Lu,7 Weiguo Jing,7 Shibo Jiang,7 Wolf-Georg Forssmann,2,8, and Frank Kirchhoff1,
1 Institute of Virology, University of Ulm, 89081 Ulm, Germany
2 IPF PharmaCeuticals GmbH, 30625 Hannover, Germany
3 VIRO Pharmaceuticals GmbH & Co. KG, 30625 Hannover, Germany
4 University of Erlangen-Nürnberg, Institute for Clinical and Molecular Virology and Nikolaus-Fiebiger-Center, 91054 Erlangen, Germany
5 Institute for Chemistry, University of Lübeck, 23538 Lübeck, Germany
6 Organic Chemistry, Faculty of Sciences, University of Hamburg, 20146 Hamburg, Germany
7 Lindsley F. Kimball Research Institute, The New York Blood Center, New York, NY 10021, USA
8 Hannover Medical School, Center of Pharmacology, 30625 Hannover, Germany
Corresponding author
Wolf-Georg Forssmann
wgforssmann@ipf-pharmaceuticals.de
Corresponding author
Frank Kirchhoff
frank.kirchhoff@uniklinik-ulm.de
A variety of molecules in human blood have been implicated in the inhibition of HIV-1. However, it remained elusive which circulating natural compounds are most effective in controlling viral replication in vivo. To identify natural HIV-1 inhibitors we screened a comprehensive peptide library generated from human hemofiltrate. The most potent fraction contained a 20-residue peptide, designated VIRUS-INHIBITORY PEPTIDE (VIRIP), corresponding to the C-proximal region of α1-antitrypsin, the most abundant circulating serine protease inhibitor. We found that VIRIP inhibits a wide variety of HIV-1 strains including those resistant to current antiretroviral drugs. Further analysis demonstrated that VIRIP blocks HIV-1 entry by interacting with the gp41 fusion peptide and showed that a few amino acid changes increase its antiretroviral potency by two orders of magnitude. Thus, as a highly specific natural inhibitor of the HIV-1 gp41 fusion peptide, VIRIP may lead to the development of another class of antiretroviral drugs.