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1996-02-26
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Document 0516
DOCN M9620516
TI Comparison of p56lck and p59fyn protein expression in thymocyte subsets,
peripheral T cells, NK cells, and lymphoid cell lines.
DT 9602
AU Olszowy MW; Leuchtmann PL; Veillette A; Shaw AS; Center for Immunology,
Washington University School of Medicine,; St. Louis, MO 63110, USA.
SO J Immunol. 1995 Nov 1;155(9):4236-40. Unique Identifier : AIDSLINE
MED/96025880
AB The expression of the src-family kinases, p56lck and p59fyn, is critical
for thymocyte development and TCR-mediated signal transduction, and may
be important for signaling through other lymphoid receptors as well.
Overexpression studies have demonstrated that the levels of p56lck and
p59fyn expression can affect T cell development and signaling through
the TCR. Therefore, it is likely that their exact expression levels play
an important role in modulating signaling in thymocytes, mature T cells,
and other lymphocytes. Here, we used quantitative immunoblotting to
measure p56lck and p59fyn protein expression levels in thymocyte
subsets, peripheral T cells, NK cells, and lymphoid cell lines. p59fyn
expression levels were similar to p56lck in most cells that were
examined demonstrating that p59fyn is abundantly expressed in T cells.
In addition, we found that p56lck protein expression is equivalent in
CD4 and CD8 double-negative, double-positive, and single-positive
thymocytes. In contrast, p59fyn expression levels were significantly
lower in double-positive thymocytes than in the other thymocyte
subpopulations. Finally, we demonstrate that p56lck and p59fyn
expression varies greatly in a number of cell lines used to study T cell
activation and that IL-2 treatment can dynamically regulate p56lck and
p59fyn expression in some cells.
DE src-Family Kinases/*BIOSYNTHESIS/IMMUNOLOGY Animal Cell Line
Comparative Study CD4-Positive T-Lymphocytes/METABOLISM CD8-Positive
T-Lymphocytes/METABOLISM Female Human Interleukin-2/PHARMACOLOGY
Killer Cells, Natural/DRUG EFFECTS/*METABOLISM Mice Mice, Inbred BALB
C Mice, SCID Protein-Tyrosine Kinase/*BIOSYNTHESIS/IMMUNOLOGY
Proto-Oncogene Proteins/*BIOSYNTHESIS/IMMUNOLOGY Support, U.S. Gov't,
P.H.S. T-Lymphocyte Subsets/*METABOLISM Tumor Cells, Cultured JOURNAL
ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).