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- W1997386475 abstract "A regulatory function for CD4 molecules in lymphocyte adhesion and motility was investigated. Murine splenic CD4+ T cells, activated in the presence of phorbol ester and immobilized anti-CD4 mAb, adhered to the plastic surface and formed extended cytoplasmic projections (pseudopodia). Pseudopod formation was cell-density-dependent, peaked at Day 3, and disappeared by Day 5 in culture. This response could be inhibited by soluble anti-CD4 and by RGD-containing peptide. Ligation of CD4 was required at a late stage in cell activation, and stimulated cell motility in vitro. Addition of IL-4, but not IL-2, upregulated pseudopod formation induced by suboptimal stimuli. Anti-IL-4 mAb blocked pseudopod formation, and exogenous IL-4 restored the response. A combination of IL-4 plus phorbol ester, but not IL-2 plus phorbol ester, induced pseudopod formation in concert with CD4 ligation. Exogenous IL-2, on the other hand, blocked pseudopod formation. CD45RBlow CD4+ T cells were much more efficient than CD45RBhigh CD4+ T cells for pseudopod formation. These results indicate that CD4 ligation induces CD4+ T-cell adhesion and motility, mainly in the memory/activated subset, which might be relevant for immune responses in vivo." @default.
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- W1997386475 date "1996-08-01" @default.
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- W1997386475 title "Ligation of CD4 Concomitant to Activation Induces Primary CD4+T-Cell Adhesion and Pseudopodia Formationin Vitro" @default.
- W1997386475 doi "https://doi.org/10.1006/cimm.1996.0213" @default.
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