Expression and function of c-kit in hemopoietic progenitor cells
Minetaro Ogawa,Yumi Matsuzaki,Shin Ichi Nishikawa,S Hayashi,Takahiro Kunisada,Tetsuo Sudo,T. Kina,H Nakauchi +7 more
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TLDR
Results provide direct evidence that c-kit is an essential molecule for constitutive intramarrow hemopoiesis, especially for the self-renewal of hemopOietic progenitor cells at various stages of differentiation.Abstract:
The expression and function of a receptor tyrosine kinase, c-kit, in the adult bone marrow of the mouse were investigated by using monoclonal antibodies (mAbs) against the extracellular domain of murine c-kit. In adult C57BL/6 mouse, 7.8% of total bone marrow cells express c-kit on their surface. Half of the c-kit+ cells do not express lineage markers including Mac-1, Gr-1, TER-119, and B220, while the remainder coexpress myeloid lineage markers such as Mac-1 and Gr-1. After c-kit+ cells were removed from the bone marrow cell preparation, hemopoietic progenitor cells reactive to IL-3, GM-CSF, or M-CSF and also those which give rise to spleen colonies in irradiated recipients disappeared almost completely. Thus, most hemopoietic progenitors in the adult bone marrow express c-kit. To investigate whether or not c-kit has any role in the hemopoiesis of adult bone marrow, we took the advantage of one of the anti-c-kit mAbs that can antagonize the function of c-kit. As early as two days after the injection of 1 milligram of an antagonistic antibody, ACK2, almost all hemopoietic progenitor cells disappeared from the bone marrow, which eventually resulted in the absence of mature myeloid and erythroid cells in the bone marrow. These results provide direct evidence that c-kit is an essential molecule for constitutive intramarrow hemopoiesis, especially for the self-renewal of hemopoietic progenitor cells at various stages of differentiation.read more
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AC133, a Novel Marker for Human Hematopoietic Stem and Progenitor Cells
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References
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The murine mutation osteopetrosis is in the coding region of the macrophage colony stimulating factor gene
Hisahiro Yoshida,Shin-Ichi Hayashi,Takahiro Kunisada,Minetaro Ogawa,Satomi Nishikawa,Hitoshi Okamura,Tetsuo Sudo,Leonard D. Shultz,Shin Ichi Nishikawa +8 more
TL;DR: It is shown that op/op fibroblasts are defective in production of functional macrophage colony-stimulating factor (M-CSF), although its messenger RNA (Csfm mRNA) is present at normal levels, and it is concluded that the pathological changes in this mutant result from the absence of M- CSF.
Journal ArticleDOI
Stem cell factor is encoded at the SI locus of the mouse and is the ligand for the c-kit tyrosine kinase receptor
Krisztina M. Zsebo,David A. Williams,Edwin N. Geissler,Virginia C. Broudy,Francis Hall Martin,Harry L. Atkins,Rou Yin Hsu,Neal C. Birkett,Kenneth H. Okino,Murdock Douglas C,Frederick W. Jacobsen,Keith Langley,Kent A. Smith,Takashi Takeish,Bruce M. Cattanach,Stephen J. Galli,Sidney Vaughn Suggs +16 more
TL;DR: In vivo administration of SCF can reverse the macrocytic anemia and locally repair the mast cell deficiency of Sl/Sld mice and provide biological and physical evidence that SCF is a ligand for the c-kit receptor.
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