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M9610130.TXT
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1996-01-30
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Document 0130
DOCN M9610130
TI Changes to alveolar macrophage phenotype in HIV infected individuals
with normal CD4 counts and no respiratory disease.
DT 9601
AU Lipman MC; Johnson MA; Bray DH; Poulter LH; Department of Clinical
Immunology, Royal Free Hospital and School; of Medicine, London, UK.
SO Thorax. 1995 Jul;50(7):777-81. Unique Identifier : AIDSLINE MED/96014681
AB BACKGROUND--It has previously been shown that HIV infected individuals
with pneumonitis have identifiable abnormalities in alveolar macrophages
obtained by bronchoalveolar lavage (BAL). In particular, alterations in
the expression of alveolar macrophage surface antigens associated with
macrophage function have been reported. To determine whether these
changes reflect HIV infection or the respiratory episode itself, a
population of HIV infected patients with no respiratory disease was
studied. METHODS--Twenty two HIV antibody positive individuals with a
peripheral blood CD4 count of > 400/microliters and 10 healthy volunteer
controls underwent bronchoscopy and BAL. Cytospin preparations from the
recovered cells were stained using immunoperoxidase and double
immunofluorescence techniques with monoclonal antibodies RFD1, RFD7,
EBM11/CD68 (mature macrophages), UCHM1/CD14 (monocyte marker), and
HLA-DR (RFDR1). Differential cell counts were also performed.
RESULTS--There was an increase in overall alveolar macrophage HLA-DR
expression in the HIV population. This was not reflected in a change in
the percentage of cells staining CD14 (monocytes) or CD68 (mature
macrophages) positive. The relative proportions of cells staining RFD1 +
RFD7- (inducer cells), RFD1 - RFD7+ (effector cells), and RFD1 + RFD7+
(suppressive cells) were unchanged between HIV and control groups.
CONCLUSIONS--In a population of HIV infected individuals with normal CD4
counts and no respiratory disease there was an increase in overall
alveolar macrophage HLA-DR expression which occurred independently of
any alteration in the relative proportions of alveolar macrophage
subpopulations.
DE beta 2-Microglobulin/ANALYSIS Adult Antigen-Presenting Cells
AIDS-Related Complex/COMPLICATIONS Cell Count CD4 Lymphocyte Count
Female Human HIV Infections/*IMMUNOLOGY HLA-DR Antigens/*IMMUNOLOGY
Lymphocyte Count Macrophages, Alveolar/*IMMUNOLOGY Male 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).