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M9480572.TXT
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Document 0572
DOCN M9480572
TI Mycobacterium avium infection in HIV-1-infected subjects increases
monokine secretion and is associated with enhanced viral load and
diminished immune response to viral antigens.
DT 9410
AU Denis M; Ghadirian E; Pulmonary Research Unit, Faculty of Medicine,
University of; Sherbrooke, Canada.
SO Clin Exp Immunol. 1994 Jul;97(1):76-82. Unique Identifier : AIDSLINE
MED/94306756
AB The complex interaction between HIV-1 infection and Mycobacterium avium
was studied. Viral burden was assessed, as well as immune response to
HIV-1 in the context of Myco. avium infections. We also examined serum
cytokine levels and cytokine release by blood mononuclear cells in
HIV-1-infected subjects, infected or not with Myco. avium. Undetectable
serum levels of IL-1, tumour necrosis factor-alpha (TNF-alpha) and IL-6
were found in normal controls and in groups I, II and III of
HIV-1-infected subjects. Moderate levels of TNF-alpha, IL-1 and IL-6
were found in the sera of group IV patients. When group IV was
subdivided into subjects with and without Myco. avium infections,
subjects with Myco, avium infections were shown to have higher serum
levels of TNF-alpha, IL-1 beta and IL-6 than those with other
infections. Blood mononuclear cells from controls and HIV subjects were
stimulated with bacterial lipopolysaccharide, and cytokine levels
assessed. Cells from group II patients were shown to secrete normal
levels of TNF-alpha and IL-6, and lower levels of IL-1 beta; group III
subjects released higher levels of IL-6. Patients in group IV had blood
cells that released elevated levels of IL-6 and TNF-alpha, and lower
levels of IL-1 beta. Group IV subjects with Myco. avium infections had
blood cells that released higher levels of TNF-alpha, IL-6 and IL-1 than
group IV subjects with other infections. Assessment of viral burden in
cells of HIV-1-infected subjects revealed that Myco. avium-infected
subjects had a higher level of virus burden and a lower level of
lymphoproliferative response to an inactivated gp120-depleted HIV-1
antigen than AIDS subjects with other infections. These data suggest
that Myco. avium infections in HIV-1-infected subjects hasten the
progression of viral disease, enhance cytokine release and contribute to
the anergy to viral antigens.
DE beta 2-Microglobulin/METABOLISM AIDS-Related Opportunistic
Infections/*COMPLICATIONS/*IMMUNOLOGY/ MICROBIOLOGY
Cytokines/BLOOD/SECRETION Human HIV Antigens/IMMUNOLOGY HIV Core
Protein p24/BLOOD *HIV-1/IMMUNOLOGY/ISOLATION & PURIF Immunity,
Cellular In Vitro Leukocytes, Mononuclear/IMMUNOLOGY Lymphocyte
Transformation Monokines/*SECRETION Mycobacterium avium-intracellulare
Infection/*COMPLICATIONS/ *IMMUNOLOGY/MICROBIOLOGY Support, Non-U.S.
Gov't JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).