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M9630183.TXT
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1996-02-27
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Document 0183
DOCN M9630183
TI Impaired natural immunity to pneumolysin during human immunodeficiency
virus infection in the United States and Africa.
DT 9603
AU Amdahl BM; Rubins JB; Daley CL; Gilks CF; Hopewell PC; Janoff EN;
Department of Medicine, Veterans Affairs Medical Center, USA.
SO Am J Respir Crit Care Med. 1995 Dec;152(6 Pt 1):2000-4. Unique
Identifier : AIDSLINE MED/96094250
AB Human immunodeficiency virus (HIV) infection is associated with a
significantly increased incidence of pneumococcal pneumonia and
concomitant bacteremia. We hypothesized that the predisposition of
HIV-infected patients to invasive pneumococcal infection may be related,
in part, to an impaired immune response to the pneumococcal antigen
pneumolysin (PLY) because PLY facilitates bacterial invasion. We
measured serum anti-PLY antibodies in two separate populations of
HIV-infected and HIV-seronegative controls, using both an enzyme-linked
immunosorbent assay method and a functional assay of antibody inhibition
of PLY-induced hemolysis and cytotoxicity. HIV-infected patients in the
United States had significantly lower titers of anti-PLY antibodies by
both methods than did seronegative control subjects. Moreover,
HIV-infected patients in Kenya who later developed pneumococcal
bacteremia also had significantly lower anti-PLY antibody levels at
baseline compared with seronegative control subjects. We conclude that
lower baseline levels of antibodies to PLY are associated with the
higher incidence of bacteremic pneumococcal infections among
HIV-infected patients.
DE Adult Antibodies, Bacterial/ANALYSIS AIDS-Related Opportunistic
Infections/IMMUNOLOGY Comparative Study Cytotoxicity, Immunologic
Cytotoxins/IMMUNOLOGY Enzyme-Linked Immunosorbent Assay Female Human
HIV Infections/*IMMUNOLOGY HIV Seronegativity/IMMUNOLOGY *Immunity,
Natural Kenya Male Pneumonia, Lobar/COMPLICATIONS/IMMUNOLOGY
Streptolysins/*IMMUNOLOGY Support, Non-U.S. Gov't Support, U.S. Gov't,
Non-P.H.S. Support, U.S. Gov't, P.H.S. United States JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).