title: Changes in the level of soluble CD-2 molecules in the serum of HIV-infected individuals.
abstract: It has been shown previously that the level of soluble CD-2 determinants (E-receptors) is elevated in the serum of patients with various immunodeficiency states. The aim of the present preliminary study was to determine the level of soluble CD-2 in the sera of individuals infected with human immunodeficiency virus (HIV), in order to assess the contribution of soluble CD-2 molecules to the immunological deterioration of these patients. The serum CD-2 concentration was determined by an enzyme-linked immunosorbent assay, using a monoclonal CD-2 antibody. Considerable levels of CD-2 were detected in the sera of 15.9% of 63 normal controls tested, with a mean absorbance at 492 nm of 0.154 +/- 0.033. In contrast, in none of the 13 asymptomatic HIV-infected individuals tested could soluble CD-2 be detected (mean absorbance of 0.00093 +/- 0.0048). Elevated concentrations of CD-2 were found in the sera of 3 of 12 patients tested who were suffering from acquired immunodeficiency syndrome (AIDS). Thus, following HIV infection there is an initial phase of reduction of soluble CD-2, probably reflecting diminished T-cell activation. Thereafter, in some AIDS patients episodes of T-cell destruction seem to be correlated with the release of CD-2 molecules into the serum.
authors.affiliation: Hubert H. Humphrey Center for Experimental Medicine and Cancer Research, Hebrew University-Hadassah Medical School, Jerusalem, Israel.
authors.forename: M
authors.initials: M
authors.lastname: Schlesinger
authors.forename: O
authors.initials: O
authors.lastname: Afik
authors.forename: O
authors.initials: O
authors.lastname: Loves
authors.forename: S
authors.initials: S
authors.lastname: Maayan
authors.forename: R
authors.initials: R
authors.lastname: Rabinowitz
mesh_terms: D000386:AIDS-Related Complex / Q000097:blood / Q000276:immunology; D000163:Acquired Immunodeficiency Syndrome / Q000097:blood / Q000276:immunology; D000945:Antigens, Differentiation, T-Lymphocyte / Q000032:analysis*; D018801:CD2 Antigens; D004797:Enzyme-Linked Immunosorbent Assay; D015658:HIV Infections / Q000097:blood* / Q000276:immunology; D006801:Humans; D007958:Leukocyte Count; D011971:Receptors, Immunologic / Q000032:analysis*
chemical_list: D000945:Antigens, Differentiation, T-Lymphocyte; D018801:CD2 Antigens; D011971:Receptors, Immunologic