home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
The Arsenal Files 6
/
The Arsenal Files 6 (Arsenal Computer).ISO
/
health
/
med9605d.zip
/
M9650921.TXT
< prev
next >
Wrap
Text File
|
1996-03-30
|
3KB
|
53 lines
Document 0921
DOCN M9650921
TI CD8+ lymphocytes in bronchoalveolar lavage and blood: in vivo indicators
of lung pathology caused by maedi-visna virus.
DT 9505
AU Lujan L; Begara I; Collie DD; Watt NJ; Department of Veterinary
Pathology, Royal (Dick) School of; Veterinary Studies, University of
Edinburgh, Easter Bush, UK.
SO Vet Immunol Immunopathol. 1995 Nov;49(1-2):89-100. Unique Identifier :
AIDSLINE MED/96158379
AB A study to determine the putative relationship between lymphocyte
phenotypic alterations in bronchoalveolar lavage fluid and stage of lung
pathology in maedi-visna infected sheep has been carried out. Twenty-one
ewes (16 Texel and five Scottish blackface) naturally infected by
maedi-visna virus and three Oxford controls were used. Animals were
killed, lungs were removed, bronchoalveolar lavage was performed and
pathological studies were completed. Blood samples were also obtained
from 16 animals. Lymphocytes in both bronchoalveolar lavage and
peripheral blood were labelled with monoclonal antibodies against the
main T lymphocyte subsets (CD4, CD8, CD5 and gamma delta TCR) in order
to perform flow cytometric studies. Three aspects of pathology were
studied: lymphoid interstitial pneumonia, lymphoid follicular
hyperplasia and smooth muscle hyperplasia. Percentages of CD4+, CD5+,
gamma delta + T cells and the value for the CD4+ / CD8+ ratio in
bronchoalveolar lavage of maedi-visna infected animals were
significantly decreased (P < 0.05) when compared to controls, while
percentages of CD8+ lymphocytes were increased in bronchoalveolar lavage
of infected sheep and they were very close to being significant (P =
0.07) when compared to controls. Lesions were evaluated and simple
least-squares regression tests demonstrated that there were several
significant correlations between various lymphocyte subsets and
pathological parameters studied in this work. However, when a multiple
regression test was applied to the data, it was observed that only the
CD8+ T cell subset both in bronchoalveolar lavage and in blood was
significantly correlated with severity of lung pathology. It is
concluded that CD8+ lymphocytes are key cells in the development of the
interstitial reaction and the lymphocytic alveolitis observed in
maedi-visna infected ewes and that the CD8+ alveolitis is a parallel
feature to the intensity of lung lesions. It is further suggested that
the percentage of CD8+ lymphocytes in bronchoalveolar lavage and in
blood may act as in vivo indicators of lung pathology in maedi-visna
infected sheep.
DE Animal Bronchoalveolar Lavage Fluid/*CYTOLOGY/*IMMUNOLOGY CD8-Positive
T-Lymphocytes/*IMMUNOLOGY/*PATHOLOGY Female
Lung/*IMMUNOLOGY/*PATHOLOGY Lymphocyte Count Lymphocyte
Subsets/IMMUNOLOGY/PATHOLOGY Phenotype Pneumonia, Progressive
Interstitial, of Sheep/*IMMUNOLOGY/ *PATHOLOGY Sheep 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).