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M9650470.TXT
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1996-03-09
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Document 0470
DOCN M9650470
TI Characterization of circulating CD4+ CD8+ lymphocytes in healthy
individuals prompted by identification of a blood donor with a markedly
elevated level of CD4+ CD8+ lymphocytes.
DT 9605
AU Prince HE; Golding J; York J; Cellular Immunology Laboratory, American
Red Cross Blood and; Tissue Services, Southern California Region, Los
Angeles, USA.
SO Clin Diagn Lab Immunol. 1994 Sep;1(5):597-605. Unique Identifier :
AIDSLINE MED/96050877
AB During flow cytometric analysis of lymphocytes from healthy donors, we
identified a donor (donor A) with 22% CD4+ CD8+ cells (versus values of
< 4% for 65 other controls). To determine if CD4+ CD8+ cells from donor
A and other controls were similar, we first defined the phenotypic
profile of control CD4+ CD8+ cells. Enriched CD4+ CD8+ cell populations
for 10 controls were prepared by a two-step positive selection scheme
with anti-CD4-coated magnetic beads and anti-CD8-coated culture flasks;
the selected population averaged 69% CD4+ CD8+ cells and 31% CD4+ CD8-
cells. For all 10 controls, two subsets of CD4+ CD8+ cells, CD4dim
CD8bright and CD4bright CD8dim, were observed. Phenotypic profiles of
these two CD4+ CD8+ subsets were defined by pairing anti-CD8 with other
monoclonal antibodies, and the profiles were compared with each other
and with those of CD4+ CD8-, CD4- CD8bright, and CD4- CD8dim cells.
CD8bright and CD4bright CD8dim cells differed in their proportions of
CD62-L+ cells and in their levels of CD11a and CD2 expression. Both CD4+
CD8+ subsets resembled CD4+ CD8- cells in CD45RA, CD45RO, and CD25
expression; the comparable CD- CD8+ cells in CD62-L expression; and CD4-
CD8bright cells in CD11b, CD11b, CD16/56, and CD28 expression. CD38
expression in both CD4+ CD8+ subsets was decreased compared with those
of other cell subsets. Whereas control CD4+ CD8+ cells averaged 33%
CD4dim CD8bright, CD4+ CD8+ cells from donor A were > 90% CD4dim
CD8bright. Donor A CD4dim CD8bright cells exhibited proportional
decreases in CD25 and CD62-L expression and increases in CD11b and CD54
expression compared with those of control CD4dim CD8bright
cells.(ABSTRACT TRUNCATED AT 250 WORDS)
DE *Blood Donors Case Report CD4-CD8 Ratio CD4-Positive
T-Lymphocytes/*CYTOLOGY/IMMUNOLOGY CD8-Positive
T-Lymphocytes/*CYTOLOGY/IMMUNOLOGY Female Flow Cytometry Human
Immunophenotyping Lymphocyte Count Lymphocyte Subsets/IMMUNOLOGY
Lymphocyte Transformation/IMMUNOLOGY Male Middle Age 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).