Steel factor and c-kit receptor: from mutants to a growth factor system
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K Morrison-Graham1, Y Takahashi
1Institute of Neuroscience, University of Oregon, Eugene 97403.
Abstract:
Mutations within the Steel and Dominant Spotting loci of mice have led to the recent identification of a growth factor/receptor system required for the normal development of germ cells, pigment cells and hematopoietic cells. Interactions between the products of these genes, Steel factor and c-Kit respectively, have now been demonstrated to influence various developmental processes, including survival, proliferation, and/or differentiation of cells in a tissue specific manner. In addition, our current understanding of the molecular basis of various Steel and Dominant Spotting alleles coupled with the emerging information on the expression pattern of steel factor and c-kit transcripts during development, is now beginning to explain the pleiotropic affects of these mutations.
Insights
Mutations in mouse Steel and Dominant Spotting genes revealed a crucial growth factor/receptor system. This system, involving Steel factor and c-Kit, is essential for germ cell, pigment cell, and hematopoietic cell development.
Area of Science:
- Developmental Biology
- Genetics
- Cell Biology
Background:
- Mutations in mouse Steel and Dominant Spotting loci have identified a critical growth factor/receptor system.
- This system is vital for the development of germ cells, pigment cells, and hematopoietic cells.
Purpose of the Study:
- To elucidate the role of the Steel factor and c-Kit receptor system in cellular development.
- To understand the molecular basis of Steel and Dominant Spotting mutations and their effects.
Main Methods:
- Analysis of mutations within the Steel and Dominant Spotting loci in mice.
- Investigation of the expression patterns of steel factor and c-kit transcripts during development.
Main Results:
- Demonstrated that Steel factor and c-Kit interactions influence cell survival, proliferation, and differentiation in a tissue-specific manner.
- Linked the molecular understanding of Steel and Dominant Spotting alleles to observed pleiotropic effects.
Conclusions:
- The Steel factor/c-Kit system is fundamental for normal development of multiple cell types.
- Understanding gene expression patterns helps explain the complex effects of these mutations on development.