A mouse-based strategy for cyclophosphamide pharmacogenomic discovery

被引:22
作者
Watters, JW
Kloss, EF
Link, DC
Graubert, TA
McLeod, HL
机构
[1] Washington Univ, Sch Med, Dept Med, St Louis, MO 63110 USA
[2] Washington Univ, Sch Med, Dept Dermatol, St Louis, MO 63110 USA
[3] Washington Univ, Sch Med, Dept Genet, St Louis, MO 63110 USA
[4] Washington Univ, Sch Med, Dept Mol Biol & Pharmacol, St Louis, MO 63110 USA
[5] Siteman Canc Ctr, St Louis, MO 63110 USA
关键词
pharmacogenetics; mobilization;
D O I
10.1152/japplphysiol.00214.2003
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
Genome-wide mapping approaches are needed to more fully understand the genetic basis of chemotherapy response. Because of technical and ethical limitations, cancer pharmacogenomics has not yet benefited from traditional robust familial genetic strategies. We have therefore explored the use of the inbred mouse as a genetic model system in which to study response to the cytotoxic agent cyclophosphamide. Multiple phenotypes have been assessed in response to cyclophosphamide in up to 19 inbred mouse strains, including in vitro hematopoietic progenitor cell toxicity and the mobilization of hematopoietic progenitor cells into peripheral blood. Hematopoietic progenitor cell toxicity in vitro varied 2-fold among strains, whereas in vivo progenitor cell mobilization varied almost 75-fold among strains. Males mobilized more hematopoietic progenitor cells than did females, and the low-mobilization phenotype was dominant to the high-mobilization phenotype in F1 hybrid animals. In an initial attempt to analyze candidate genes, genetic variation was assessed in three cytochrome P-450 genes involved in the metabolism of cyclophosphamide. Resequencing of eight strains identified 26 polymorphisms in these genes that may influence response to cyclophosphamide. Distinct regions of high- and low-polymorphism rates were identified, and two common haplotypes were shared among the strains for each gene that exhibited variation. This phenotypic and genotypic variation among inbred strains provides a framework for cyclophosphamide pharmacogenomic discovery.
引用
收藏
页码:1352 / 1360
页数:9
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