期刊
ONCOGENE
卷 23, 期 25, 页码 4495-4504出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/sj.onc.1207584
关键词
genetic susceptibility; inbred strains; lung tumors; Kras2
The pulmonary adenoma susceptibility 1 (Pas1) locus affects inherited predisposition and resistance to chemically induced lung tumorigenesis in mice. The A/J and C57BL/6J mouse strains carry the susceptibility and resistance allele, respectively. We identified and geno-typed 65 polymorphisms in the Pas1 locus region in 29 mouse inbred strains, and delimited the Pas1 locus to a minimal region of 468 kb containing six genes. That region defined a core Pas1 haplotype with 42 tightly linked markers, including intragenic polymorphisms in five genes (Bcat1, Lrmp, Las1, Ghiso, and Kras2) and amino-acid changes in three genes ( Lrmp, Las1, Lmna-rs1). In (A/J x C57BL/6J) F1 mouse lung tumors, the Lmna-rs1 gene was completely downregulated, whereas allele-specific downregulation of the C57BL/6J-derived allele was observed at the Las1 gene, suggesting the potential role of these genes in tumor suppression. These results indicate a complex multigenic nature of the Pas1 locus, and point to a functional role for both intronic and exonic polymorphisms of the Pas1 haplotype in lung tumor susceptibility.
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