title: Reduced CD21 (CR2) and CD54 (ICAM-1) expression in MT2 cells with HIV-1 or HIV-2 strains.
abstract: Alterations in the expression of cell-surface receptors have been reported in HIV-infected cells for CD4, CD25 (IL-2 receptor), CD2, CD3 and CD8 and CD26. In the present study we provide evidence that CD21 is down-regulated in the human T-lymphoblastoid cell line MT2 after infection with HIV-1 and -2 isolates. The same effect was observed with ICAM-1 (CD54). CD21 expression was monitored by means of fluorescence intensity, its functional ability to bind to C3d and by quantitative measurement of CD21-antigen in supernatants and cell lysates using an immunoassay. In addition, the decrease of CD21 and ICAM-1-specific mRNA suggests a mechanism at a transcriptional level. Our data suggest that HIV might have a direct influence on the receptor expression.
authors.affiliation: Institut für Hygiene, Universität Innsbruck, Austria.
authors.forename: C
authors.initials: C
authors.lastname: Larcher
authors.forename: N
authors.initials: N
authors.lastname: Julen
authors.forename: W M
authors.initials: WM
authors.lastname: Prodinger
authors.forename: M
authors.initials: M
authors.lastname: Tötsch
authors.forename: L
authors.initials: L
authors.lastname: Gürtler
authors.forename: M P
authors.initials: MP
authors.lastname: Dierich
mesh_terms: D002461:Cell Line, Transformed; D015536:Down-Regulation / Q000276:immunology*; D015497:HIV-1 / Q000276:immunology*; D015498:HIV-2 / Q000276:immunology*; D006801:Humans; D018799:Intercellular Adhesion Molecule-1 / Q000235:genetics / Q000378:metabolism*; D012333:RNA, Messenger / Q000032:analysis; D017464:Receptors, Complement 3d / Q000235:genetics / Q000378:metabolism*; D013601:T-Lymphocytes / Q000276:immunology* / Q000821:virology
chemical_list: D012333:RNA, Messenger; D017464:Receptors, Complement 3d; D018799:Intercellular Adhesion Molecule-1