Intrathymically expressed c-kit ligand (stem cell factor) is a major factor driving expansion of very immature thymocytes in vivo

Hans Reimer Rodewald, Katja Kretzschmar, Wojciech Swat, Shunichi Takeda

Research output: Contribution to journalArticle

166 Scopus citations

Abstract

To investigate the role of the receptor-type tyrosine kinase, c-kit and its ligand, stem cell factor (SCF) in T cell development, we analyzed c-kit (W/W) and SCF (SI/SI) deficient mice. We also engrafted wild-type or SCF-deficient fetal thymi onto wild-type recipient mice and analyzed the rate of proliferation by in vivo bromodeoxyuridine labeling. The results show that the most immature thymocyte compartment defined as CD3-CD4-CD8- is significantly reduced in SI/SI grafts and W/W thymi compared with wild-type counterparts. Also, the expansion rate of these immature thymocytes in SI/SI graft is reduced by ∼50%. These experiments provide direct evidence for an important role for c-kit-SCF interactions in expansion of very early thymocytes.

Original languageEnglish
Pages (from-to)313-319
Number of pages7
JournalImmunity
Volume3
Issue number3
DOIs
StatePublished - Sep 1995
Externally publishedYes

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