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1996-02-26
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Document 0066
DOCN M9620066
TI Enhanced proliferation and IL-2 secretion by lung lymphocytes from
HIV-infected subjects.
DT 9602
AU Spain BA; Soliman DM; Sidner RA; Twigg HL; Department of Medicine,
Indiana University Medical Center,; Indianapolis 46202, USA.
SO Am J Physiol. 1995 Oct;269(4 Pt 1):L498-506. Unique Identifier :
AIDSLINE MED/96043434
AB Human immunodeficiency virus (HIV)-positive patients frequently develop
a CD3+/CD8+ cytotoxic T cell lymphocytic alveolitis. This could occur
through in situ expansion of lung lymphocytes. We evaluated lung and
blood lymphocyte proliferation in asymptomatic HIV-infected individuals
by measuring spontaneous and cytokine-induced tritiated thymidine
incorporation. Interleukin (IL)-2 and IL-4 secretion was determined with
the use of enzyme-linked immunosorbent assay, Western blotting, and
immunoprecipitation techniques. Spontaneous proliferation by lung
lymphocytes from HIV-positive patients was significantly greater than
that of normal volunteers. Proliferation was confined to the CD8+
lymphocyte subset. Over time, spontaneous proliferation declined unless
autologous alveolar macrophages (AM) were added, suggesting AM were
providing additional stimulatory signals to lung lymphocytes. Lung and
blood lymphocytes proliferated in response to IL-2 but not IL-4.
Lymphocytes in HIV-infected lung spontaneously produced and secreted
more IL-2 than either normal lung lymphocytes or autologous blood
lymphocytes. IL-4 production was not detectable in either group. These
findings support the hypothesis that lymphocytic alveolitis in
asymptomatic HIV-positive patients results from IL-2-dependent in situ
proliferation of CD3+/CD8+ cytotoxic T cells.
DE Adult Blood Cells/PATHOLOGY Cell Division/DRUG EFFECTS Human HIV
Infections/*METABOLISM/*PATHOLOGY
Interleukin-2/BIOSYNTHESIS/PHARMACOLOGY/*SECRETION
Interleukin-4/BIOSYNTHESIS/PHARMACOLOGY Lung/METABOLISM/*PATHOLOGY
Lymphocytes/*PATHOLOGY/*SECRETION Support, U.S. Gov't, P.H.S. JOURNAL
ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).