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Genetic dissection of kit-dependent ...

Rawls, John Franklin.

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Genetic dissection of kit-dependent melanocyte development in zebrafish, Danio rerio.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Genetic dissection of kit-dependent melanocyte development in zebrafish, Danio rerio./
Author:	Rawls, John Franklin.
Description:	147 p.
Notes:	Source: Dissertation Abstracts International, Volume: 62-11, Section: B, page: 4920.
Contained By:	Dissertation Abstracts International62-11B.
Subject:	Biology, Genetics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3032737
ISBN:	0493454586

Genetic dissection of kit-dependent melanocyte development in zebrafish, Danio rerio.
Rawls, John Franklin.

Genetic dissection of kit-dependent melanocyte development in zebrafish, Danio rerio. - 147 p.

Source: Dissertation Abstracts International, Volume: 62-11, Section: B, page: 4920.

Thesis (Ph.D.)--Washington University, 2001.

Vertebrate melanocyte development serves as a classic model for the study of cell migration and survival. However, the findings that adult melanocytes in mice and fish, such as those that re-establish the melanocyte stripes of the zebrafish (<italic>Danio rerio</italic>) during fin regeneration, arise from stem cells present new opportunities to study stem cell biology. Using melanocyte regeneration in the zebrafish fin as model to investigate the mechanisms underlying melanocyte stem cell development, I showed that zebrafish mutant for the kit receptor tyrosine kinase (<italic>sparse</italic>) are defective for melanocyte regeneration. My studies also revealed a secondary class of regeneration melanocytes that regulates its activity in the absence of <italic> kit</italic> function to reconstitute the stripes during late stages of fin regeneration.

ISBN: 0493454586Subjects--Topical Terms:

1017730
Biology, Genetics.

Genetic dissection of kit-dependent melanocyte development in zebrafish, Danio rerio.
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100 1 $a Rawls, John Franklin. $3 1900050
245 1 0 $a Genetic dissection of kit-dependent melanocyte development in zebrafish, Danio rerio.
300 $a 147 p.
500 $a Source: Dissertation Abstracts International, Volume: 62-11, Section: B, page: 4920.
500 $a Chair: Stephen L. Johnson.
502 $a Thesis (Ph.D.)--Washington University, 2001.
520 $a Vertebrate melanocyte development serves as a classic model for the study of cell migration and survival. However, the findings that adult melanocytes in mice and fish, such as those that re-establish the melanocyte stripes of the zebrafish (<italic>Danio rerio</italic>) during fin regeneration, arise from stem cells present new opportunities to study stem cell biology. Using melanocyte regeneration in the zebrafish fin as model to investigate the mechanisms underlying melanocyte stem cell development, I showed that zebrafish mutant for the kit receptor tyrosine kinase (<italic>sparse</italic>) are defective for melanocyte regeneration. My studies also revealed a secondary class of regeneration melanocytes that regulates its activity in the absence of <italic> kit</italic> function to reconstitute the stripes during late stages of fin regeneration.
520 $a Whether adult phenotypes in <italic>kit</italic> mutants such as defects in melanocyte regeneration are the consequence of embryonic roles in melanocyte stem cell establishment, or instead reflect roles for <italic>kit</italic> during adult stages was unclear. To distinguish between these possibilities, I generated a temperature-sensitive allele of <italic>kit</italic> and used it to show that <italic>kit</italic> is required during fin regeneration to promote the population of the regenerate by melanoblasts, rather than during embryonic stages to establish melanocyte stem cells. My work further revealed that regeneration melanocytes transiently require <italic>kit</italic> for their survival following overt differentiation.
520 $a During embryonic development, <italic>kit</italic> mutant melanocytes in zebrafish, or their precursors in mammals, are unable to migrate and subsequently undergo programmed cell death. However, the specific requirements for <italic> kit</italic> in embryonic melanocyte migration and survival remained unresolved. I used a temperature-sensitive kit allele to show that <italic>kit</italic> is required for melanocyte migration during early stages of larval development. Further, I showed that melanocytes developing in the absence <italic>kit</italic> function progressively commit to cell death, and that initial migration of melanocytes is not sufficient for subsequent survival following removal of <italic> kit</italic> function. In support of independent roles for <italic>kit</italic> in melanocyte migration and survival, I identified alleles of <italic>kit </italic> that disrupt either migration or survival. The lesions encoded by these alleles reveal relationships between the structure of the <italic>kit </italic> gene and its separable developmental roles.
590 $a School code: 0252.
650 4 $a Biology, Genetics. $3 1017730
650 4 $a Biology, Cell. $3 1017686
650 4 $a Biology, Molecular. $3 1017719
690 $a 0369
690 $a 0379
690 $a 0307
710 2 0 $a Washington University. $3 1250147
773 0 $t Dissertation Abstracts International $g 62-11B.
790 1 0 $a Johnson, Stephen L., $e advisor
790 $a 0252
791 $a Ph.D.
792 $a 2001
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3032737