title: An intercellular adhesion molecule-3 (ICAM-3) -grabbing nonintegrin (DC-SIGN) efficiently blocks HIV viral budding.
abstract: Efficient inhibition of the HIV infection life cycle at the stages of viral infection, reverse transcription, and post-translational processing has been extensively studied. However, efficient inhibition of HIV assembly and budding has not been reported. Here, we report that dendritic cell-specific intercellular adhesion molecule-3 (ICAM-3) -grabbing nonintegrin (DC-SIGN) and its related protein, DC-SIGNR, effectively block HIV budding from infected cells. Cotransfection of DC-SIGN or DC-SIGNR with HIV demonstrated 95-99.5% inhibition of viral production from host cells. DC-SIGN or DC-SIGNR can also effectively inhibit 90-95% of HIV generation from infected cells. DC-SIGN efficiently reduces the amount of gp120 present on the cell plasma membrane, and completely strips off gp120 from the virions produced by the host cells, suggesting that blockage of HIV budding is due to internalization of gp120 by DC-SIGN.
authors.affiliation: UCLA School of Dentistry, 10833 Le Conte Ave., Los Angeles, CA 90095, USA.
authors.forename: Qiuwei
authors.initials: Q
authors.lastname: Wang
authors.forename: Shen
authors.initials: S
authors.lastname: Pang
mesh_terms: D015815:Cell Adhesion Molecules / Q000378:metabolism*; D002462:Cell Membrane / Q000378:metabolism; D002478:Cells, Cultured; D003713:Dendritic Cells / Q000378:metabolism; D006678:HIV / Q000254:growth & development*; D015699:HIV Envelope Protein gp120 / Q000378:metabolism; D006367:HeLa Cells; D006801:Humans; D037181:Lectins, C-Type / Q000378:metabolism*; D008954:Models, Biological; D011956:Receptors, Cell Surface / Q000378:metabolism*; D014162:Transfection; D014779:Virus Replication; D000099215:DC-Specific ICAM-3 Grabbing Nonintegrin
chemical_list: D015815:Cell Adhesion Molecules; D015699:HIV Envelope Protein gp120; D037181:Lectins, C-Type; D011956:Receptors, Cell Surface; D000099215:DC-Specific ICAM-3 Grabbing Nonintegrin; C433029:CLEC4M protein, human