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M9550134.TXT
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1995-03-04
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Document 0134
DOCN M9550134
TI Locomotor phenotypes of unstimulated CD45RAhigh and CD45ROhigh CD4+ and
CD8+ lymphocytes in three-dimensional collagen lattices.
DT 9505
AU Friedl P; Noble PB; Shields ED; Zanker KS; Faculty of Dentistry, McGill
University, Montreal, Quebec,; Canada.
SO Immunology. 1994 Aug;82(4):617-24. Unique Identifier : AIDSLINE
MED/95137625
AB The spontaneous locomotion of immunomagnetically isolated resting CD4+
and CD8+ lymphocytes in three-dimensional collagen gels was recorded by
time-lapse videomicroscopy. Two-dimensional projections of the paths of
randomly selected individual cells were digitized, plotted and
quantitatively analysed. Among five different donors 46 +/- 10% of CD4+
and CD8+ lymphocytes (n = 180) showed initial spontaneous locomotion
(individual speed 5-25 microns/min; mean speed CD4+ 5.2 +/- 3.6 microns,
CD8+ 3.23 +/- 2.72 microns). Active CD4+ cells were constantly migrating
for more than 4 hr, whereas CD8+ lymphocytes significantly slowed down
after 60-90 min in the collagen gel (P < 0.003). Quantitative analysis
of the paths indicated at least three migratory phenotypes: (1)
spontaneously locomoting cells exhibiting high speed and low frequency
of stopping; (2) a major non-motile fraction without significant
displacement; and (3) a subpopulation within CD4+ and CD8+ cells with
intermediate activity of speed and stopping. Further subtype analysis of
immunomagnetically isolated CD45RAhigh/ROlow or CD45RAlow/ROhigh
lymphocytes showed that more than 90% of CD4+ CD45RAhigh/ROlow cells
were actively locomoting. In contrast, only 20% of the CD4+
CD45ROhigh/RAlow phenotype showed spontaneous motility to a limited
degree. The data indicate that resting CD4+ and CD8+ lymphocytes
comprise further locomotory subpopulation related to the expression of
different CD45 isoforms.
DE Antigens, CD45/*ANALYSIS Cell Movement/IMMUNOLOGY Cells, Cultured
*Collagen CD4-Positive T-Lymphocytes/*PHYSIOLOGY CD8-Positive
T-Lymphocytes/*PHYSIOLOGY Extracellular Matrix/IMMUNOLOGY Human
Kinetics Microscopy, Video Support, Non-U.S. Gov't 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).