Abstract
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.
| Original language | English |
|---|---|
| Journal | Cell |
| Volume | 129 |
| Issue number | 2 |
| Pages (from-to) | 263-275 |
| Number of pages | 13 |
| ISSN | 0092-8674 |
| DOIs | |
| Publication status | Published - 20.04.2007 |
Funding
We thank Bernhard Fleckenstein and Thomas Mertens for support; Veronica L. Kuhlemann, Ulrich Schubert, and Ingrid Bennett for critical reading of the manuscript; Ilka Uhrland, Jessika Babierowski, Nadja Auer, Nicola Bailer, Daniela Krnavek, and Louise Boyer-Chatenet for their excellent technical assistance; Alexander Steinkasserer and Jutta Eisemann for dendritic cells; Gerhard Rettinger, Herbert Riechelmann, Tilmann Keck, and Kai Johannes Lorenz for providing tonsils; Oliver Hartley for PSC-RANTES; Thomas Grunwald for his RSV studies; Harry John for bioanalytical support of VIRIP peptides; Peter Henklein for the synthesis of some fusion peptides; and Gabrielle Sass for helpful discussion. A number of reagents were obtained through the NIH AIDS Reagent Program. B.M. and T.P. acknowledge the grant (DFG ME1830/1) for the 700 MHz spectrometer. This work was supported by the government of Lower Saxony and by grants from the DFG and the Wilhelm-Sander Foundation and NIH grant 1R01AI067057-01A2 to F.K. W.-G.F. is founder and shareholder and L.S. is shareholder of Pharis Pharma Holding GmbH & Co. KG, the parent company of VIRO Pharmaceuticals GmbH & Co. KG. K.A. is Managing Scientific Director of VIRO Pharmaceuticals GmbH & Co. KG. The remaining authors have no financial interest related to this work.
Research Areas and Centers
- Academic Focus: Center for Infection and Inflammation Research (ZIEL)