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M9610640.TXT
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1996-01-30
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Document 0640
DOCN M9610640
TI Monocyte responsiveness and a T-cell subtype predict the effects induced
by cotton dust exposure.
DT 9601
AU Beijer L; Jacobs RR; Boehlecke B; Andersson B; Rylander R; Department of
Environmental Medicine, Goteborg University,; Sweden.
SO Am J Respir Crit Care Med. 1995 Oct;152(4 Pt 1):1215-20. Unique
Identifier : AIDSLINE MED/96023195
AB The aim of the study was to evaluate whether peripheral cellular
parameters could predict susceptibility to decreased lung function and
associated symptoms, in response to a single exposure to cotton dust.
Previously nonexposed subjects (n = 42) inhaled an aerosol of cotton
dust in a model cardroom during a period of 5 h. The subjects were
examined before the exposure for FEV1, procoagulant activity (PCA) in
blood mononuclear cells (BMNC), and serum IgE antibodies against a pool
of inhalant antigens. Blood lymphocytes were typed into the
helper/inducer (CD4+) and cytotoxic/suppressor (CD8+) T cells in
combination with surface markers subdividing these populations. A
questionnaire was used to identify atopic and nonatopic subjects.
Immediately after exposure, the subjects were tested for FEV1 and PCA,
and symptoms were recorded with a questionnaire. The dust exposure
induced a decrease in FEV1 that was larger for the atopic group, but did
not change the PCA in BMNC. The decrease in FEV1 was positively related
to the preexposure PCA in both atopics and nonatopics. Symptoms from the
airways after the exposure were reported to the same extent in the
atopic and nonatopic group, and the subject group reporting chest
tightness had a larger preexposure PCA. The atopic group had a larger
proportion of blood CD8+ T lymphocytes negative for the monoclonal
antibody anti-S6F1 (CD8+S6F1-), and in this group the decrease in FEV1
was significantly related to the proportion of this cell type. Also, in
the atopic group, the proportion of CD8+S6F1- cells correlated
positively with the preexposure PCA, and a negative correlation was
found for this cell and serum levels of IgE.(ABSTRACT TRUNCATED AT 250
WORDS)
DE Adult Blood Coagulation Factors/*METABOLISM Case-Control Studies
Comparative Study Cotton/*ADVERSE EFFECTS CD4-Positive
T-Lymphocytes/*PHYSIOLOGY CD8-Positive T-Lymphocytes/*PHYSIOLOGY
Dust/*ADVERSE EFFECTS Female Forced Expiratory Volume/PHYSIOLOGY
Human Hypersensitivity, Immediate/BLOOD/*PHYSIOPATHOLOGY IgE/BLOOD
Leukocytes, Mononuclear/*PHYSIOLOGY Lung/*PHYSIOPATHOLOGY Male
Spirometry Support, Non-U.S. Gov't Support, U.S. Gov't, Non-P.H.S.
T-Lymphocyte Subsets/*PHYSIOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).