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M94A3224.TXT
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1994-10-25
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Document 3224
DOCN M94A3224
TI Cytofluorimetric and immunoelectronmicroscopic analysis of GM3
expression on lymphocytes from HIV infected patients.
DT 9412
AU Sorice M; Pavan A; Garofalo T; Circella A; d'Agostino F; Sansolini T;
Pinter E; Lenti L; Torrisi MR; Dip. Med. Sperimentale, Universita La
Sapienza, Roma, Italy.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):125 (abstract no. PA0120). Unique
Identifier : AIDSLINE ICA10/94369351
AB Recently, we demonstrated (Misasi et al. Clin Immunol. Immunopathol.,
67: 216, 1993) that lymphocytes from HIV infected patients have an
increased concentration of GM3 as compared to lymphocytes from healthy
donors or patients suffering from different viral diseases (infectious
mononucleosis, acute B or chronic C hepatitis). In this report we
investigated, using cytofluorimetric analysis and electron microscopy,
the expression of GM3 on T cell plasma membrane of 25 HIV-infected
patients. Cytofluorimetric analysis revealed a reactivity with anti-GM3
monoclonal antibody (GMR-6, Kotani et al, Biochim. Biophys. Acta 1117:
97, 1992) of 18.5 +/- 2.1% in the 25 anti-HIV+ subjects, as compared to
7.2 +/- 2.4% in 40 matched healthy blood donors. In all subjects the
reactivity was virtually the same in isolated CD4+ and CD8+ cells.
Immunolabeling of GM3 at electron microscopic level, using the anti-GM3
mAb followed by protein A colloidal gold conjugated, confirmed the
increase of the GM3 expression in lymphocytes from HIV infected patients
as compared to control cells. Further studies are in progress with the
aim to analyze the pattern of distribution of GM3 on lymphocyte plasma
membrane during HIV infection and to elucidate whether GM3 expression
could represent an indicator of disease progression.
DE Antibodies, Monoclonal Cell Membrane/METABOLISM/ULTRASTRUCTURE
Comparative Study Flow Cytometry/METHODS G(M3)
Ganglioside/*BIOSYNTHESIS/BLOOD Human HIV
Infections/*IMMUNOLOGY/METABOLISM
Lymphocytes/IMMUNOLOGY/*METABOLISM/ULTRASTRUCTURE Microscopy,
Immunoelectron/METHODS T-Lymphocyte Subsets/METABOLISM MEETING
ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).