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- Document 0731
- DOCN M9620731
- TI Effect of HIV vertical transmission on the ontogeny of T cell antigens
- involved in the regulation of humoral immune response.
- DT 9602
- AU Brugnoni D; Soresina A; Airo P; Ugazio AG; Notarangelo LD; Cattaneo R;
- Duse M; Clinical Immunology Service, Spedali Civili, Brescia, Italy.
- SO Clin Exp Immunol. 1995 Nov;102(2):238-42. Unique Identifier : AIDSLINE
- MED/96069869
- AB HIV infection causes progressive impairment of humoral immunity,
- including defective specific antibody production. To evaluate whether
- vertical HIV infection interferes with the expression on CD4+
- lymphocytes of developmentally regulated molecules, that play a crucial
- role in the generation of immunological memory (CD45 isoforms) and in
- attainment of antibody responses (CD40L), 22 HIV-infected children and
- 36 seroreverted children born to HIV+ mothers were studied. The
- percentage of CD40L+ PBMC after activation in vitro with phorbol
- myristate acetate (PMA) plus ionomycin was lower in HIV-infected
- children than in controls (P < 0.004). This correlated with the
- depletion of CD4+ lymphocytes (r = 0.75; P < 0.001). CD40L expression
- rose progressively with age (r = 0.36; P = 0.03) in seroreverted
- children, but not in HIV-infected children, suggesting that while in
- normal children in vivo antigen stimulation results in progressive
- attainment of CD40L expression (and thus to effective T-B cell
- cooperation), this process is largely defective in HIV-infected
- children, contributing to the genesis of humoral immune deficiency. The
- proportion of CD4+ cells bearing the CD45RO isoform was increased among
- HIV-infected infants during the first years of life. However, the
- percentage of CD4+ CD45RO+ peripheral blood mononuclear cells (PBMC)
- progressively increased with age in controls (r = 0.69; P = 0.03), but
- not in HIV-infected children, showing that while vertical transmission
- of HIV does not prevent CD45RO expression early in life, it is
- associated with a disturbance of the physiological process of antigen
- priming, contributing to poor immunological memory to T cell-dependent
- antigens.
- DE Age Factors Antigens, CD45/*METABOLISM Child Child, Preschool
- CD4-Positive T-Lymphocytes/*IMMUNOLOGY Disease Transmission, Vertical
- Female Human HIV/*IMMUNOLOGY HIV Infections/*CONGENITAL/TRANSMISSION
- Infant Male Membrane Glycoproteins/*METABOLISM Support, Non-U.S.
- Gov't T-Lymphocyte Subsets/IMMUNOLOGY JOURNAL ARTICLE
-
- SOURCE: National Library of Medicine. NOTICE: This material may be
- protected by Copyright Law (Title 17, U.S.Code).
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-