It was shown using complement-dependent cytolysis and monoclonal antibodies against CD4, CD8, and NK1.1 antigens that the cortisone-resistant CD3+4–8–NK1.1–-thymocytes spontaneously secreted a chemotactic transmitter inducing the release and directed migration of bone marrow cells. When estimating the general profile of the cytokines of these thymocytes by PCR with revertase, it was demonstrated the cells in question did not express cytokines with colony stimulating activities (SCF, IL-3, or GM-CSF) or cytokines affecting the migration of bone marrow stem elements (IL-2, 4, or 7). In addition, an active expression of gene bcl-2 was detected. Thus, the chemotactic cytokine inducing the release of bone marrow stem elements is a product of the cortisone-resistant long-living CD3+4–8–NK1.1–-T-cells of the thymus.
Russian Journal of Developmental Biology – Springer Journals
Published: Oct 13, 2004
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