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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).
-
-