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. 1991 Jul;85(1):75–79. doi: 10.1111/j.1365-2249.1991.tb05685.x

HIV induces modulation of functionally important cellular antigens.

M Wrightham 1, A Schimpf 1, T H Pennington 1, F Walker 1, H F Sewell 1
PMCID: PMC1535731  PMID: 1712685

Abstract

Infection of T lymphoblastoid CEM cells with the IIIB isolate of HIV-1 results in modulation of the expression of several cellular antigens in addition to the CD4 molecule. The intercellular adhesion receptor LFA-1 (CD11a/CD18) and HLA-DR are markedly induced in the cytoplasm and at the cell surface, and the CD7 antigen is down-regulated, being virtually undetectable by sensitive immunocytochemical techniques in the infected cell population. These modulatory effects are to some degree dependent on the virus isolate examined, as the CBL-1 British isolate did not induce comparable phenotypic changes in the CEM cell line. Furthermore, these effects are not reproduced by recombinant gp120 (IIIB isolate) or p24 added exogenously to uninfected CEM cells. The CD7 molecule appears to play a regulatory role in T cell proliferation, and the LFA-1 integrin molecule is involved in a wide range of immunologically important cell-cell interactions, as well as HIV-induced syncytium formation. The possible contributions of such effects to the pathogenesis of HIV infection are considered.

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Selected References

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