Linked Life Data

7590910

Source:http://linkedlifedata.com/resource/pubmed/id/7590910

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
1995-12-7
pubmed:abstractText
Pulmonary intraparenchymal leukocytes were purified from normal mice. By flow cytometry, 20-30% of the lymphocytes were positive for the expression of Mac1, a cell-surface antigen largely restricted to macrophages, neutrophils and natural killer (NK) cells. Sorted Mac1+ lung lymphocytes were large and had abundant cytoplasm with few azurophilic granules. Because Mac1+ lymphocytes did not contain any asiallo GM1+ cells, they are not likely to be NK cells. By a two-color flow cytometric analysis, Mac1+ lymphocytes were demonstrated to be TCR-alpha beta intermediate+, TCR-gamma delta-, CD3intermediate+, CD4-, CD8-, Thy1-, CD5-, and B220-. These Mac1+ alpha beta T cells were not found in other organs such as spleen, thymus, liver, bone marrow and intestine of mice uninfected and infected with Mycobacterium bovis BCG. There was a considerable population of this unusual subset of alpha beta T cells in the lungs of congenitally athymic nude mice. In the Mac1+ alpha beta T-cell population, the proportions of V beta 8+ T cells and of forbidden T-cell clones expressing V beta 6 TCR were not much different from that in the conventional T-cell population. These results indicated that extrathymically developed alpha beta T cells reside in considerable proportions in the lung and that Mac1 clearly discriminates these cells from conventional ones. Interestingly, the proportion of these cells increased in the lungs of mice infected with M. bovis BCG, which raises a possibility that these cells may play some role in the host defense against mycobacterial infection.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0165-2478
pubmed:author
pubmed:issnType
Print
pubmed:volume
46
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
143-52
pubmed:dateRevised
2003-11-14
pubmed:meshHeading
pubmed:year
1995
pubmed:articleTitle
Mac1 discriminates unusual CD4-CD8- double-negative T cells bearing alpha beta antigen receptor from conventional ones with either CD4 or CD8 in murine lung.
pubmed:affiliation
First Department of Internal Medicine, Faculty of Medicine, University of the Ryukyus, Okinawa, Japan.
pubmed:publicationType
Journal Article