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T cell activation antigen, CD26, as a cofactor for entry of HIV in CD4+ cells [see comments]


Science. 1993 Dec 24;262(5142):2045-50. Unique Identifier : AIDSLINE

The CD4 molecule is essential for binding HIV particles, but is not sufficient for efficient viral entry and infection. The cofactor was shown to be dipeptidyl peptidase IV (DPP IV), also known as CD26. This serine protease cleaves its substrates at specific motifs; such motifs area also highly conserved in the V3 loops of HIV-1, HIV-2, and related simian isolates. Entry of HIV-1 or HIV-2 into T lymphoblastoid and monocytoid cell lines was inhibited by a specific monoclonal antibody against DPP IV or specific peptide inhibitors of this protease. Coexpression of human CD4 and CD26 in murine NIH 3T3 cells rendered them permissive to infection by HIV-1 and HIV-2. These observations could provide the basis for developing simple and specific inhibitors of HIV and open a possibility for vaccine development.

Amino Acid Sequence Animal Antibodies, Monoclonal Antigens, Differentiation, T-Lymphocyte/*PHYSIOLOGY Cell Line CD4-Positive T-Lymphocytes/*MICROBIOLOGY Dipeptidyl Peptidases/ANTAGONISTS & INHIB/*PHYSIOLOGY Hela Cells Human HIV Envelope Protein gp120/PHYSIOLOGY HIV-1/*PATHOGENICITY HIV-2/*PATHOGENICITY L Cells Leukocytes, Mononuclear/MICROBIOLOGY Mice Molecular Sequence Data Peptide Fragments/PHYSIOLOGY Support, Non-U.S. Gov't Trypsin 3T3 Cells JOURNAL ARTICLE


Information in this article was accurate in March 30, 1994. The state of the art may have changed since the publication date. This material is designed to support, not replace, the relationship that exists between you and your doctor. Always discuss treatment options with a doctor who specializes in treating HIV.