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Role of CD4 Receptor Down-regulation During HIV-1 Infection

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Human immunodeficiency virus has evolved several redundant mechanisms to remove its receptor, the CD4 molecule, from the cell surface. Indeed, HIV-1 encodes three proteins, Nef, Vpu and Env, that have a profound effect on CD4 trafficking and catabolism. Given this functional convergence, it is believed that cell surface CD4 regulation constitutes an important determinant of viral replication and pathogenesis in vivo. This review highlights recent progress made in our understanding of the molecular mechanisms underlying the down-regulation of the CD4 receptor by HIV-1 and describes our current comprehension of the role of CD4 down-regulation during HIV-1 infection.
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Keywords: cd4 down-regulation; env; hiv-1; nef; pathogenesis; replication; vpu

Document Type: Review Article

Affiliations: Laboratory of Human Retrovirology, Department of Microbiology and Immunology, Universite de Montreal, CP 6128, Succursale Centre-Ville, Montreal, Canada.

Publication date: January 1, 2004

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  • Current HIV Research aims to cover all the latest and outstanding developments of HIV research. We invite comprehensive review articles and novel, pioneering work in the basic and clinical fields on all areas of HIV research, including virus replication and gene expression, HIV assembly, virus-cell interaction, viral pathogenesis, epidemiology and transmission, anti-retroviral therapy and adherence, drug discovery, the latest developments in HIV/AIDS vaccines and animal models, mechanisms and interactions with AIDS related diseases, social and public health issues related to HIV disease, and prevention of viral infection. Each issue of the journal contains a series of timely in-depth reviews and original research written by leaders in the field covering a range of current topics on HIV research. Periodically, the journal will invite guest editors to devote an issue on a particular area of HIV research of great interest that increases our understanding of the virus and its complex interaction with the host.
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