Journal Article

<i>Pas1</i> haplotype-dependent genetic predisposition to lung tumorigenesis in rodents: a meta-analysis

Giacomo Manenti and Tommaso A. Dragani

in Carcinogenesis

Volume 26, issue 5, pages 875-882
Published in print May 2005 | ISSN: 0143-3334
Published online October 2004 | e-ISSN: 1460-2180 | DOI: http://dx.doi.org/10.1093/carcin/bgh299
Pas1 haplotype-dependent genetic predisposition to lung tumorigenesis in rodents: a meta-analysis

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Rodent species and strains show wide variations in susceptibility to lung tumorigenesis. In mice, hierarchical clustering of 29 inbred laboratory strains by pulmonary adenoma susceptibility 1 (Pas1) locus polymorphisms separated the strains into either an A/J- or a C57BL/6J-type Pas1 haplotype. A pooled analysis (including >8500 mice) of studies on spontaneous and chemically induced lung tumorigenesis in these strains revealed a significantly higher risk of spontaneous lung tumors [odds ratio (OR) 12.17; 95% confidence interval (CI) 9.00–16.45] as well as of chemically induced lung tumors (OR 15.14; 95% CI 12.51–18.31) in the A/J-type haplotype. Strain differences were observed with six different carcinogens, suggesting that Pas1 locus activity is carcinogen-independent. Thus, the present meta-analysis indicates a link between the genetic control of spontaneous and chemically induced lung tumor susceptibility in mice. The Pas1 susceptibility allele is frequent in the population of inbred mouse strains, whereas a counterpart appears to be absent or rare in rat and hamster strains. These findings might help in the interpretation of results of rodent carcinogenicity bioassays and assessing the risk of lung carcinogenesis from chemicals.

Keywords: CI, confidence interval; OR, odds ratio; Pas1, pulmonary adenoma susceptibility 1

Journal Article.  5391 words.  Illustrated.

Subjects: Clinical Cytogenetics and Molecular Genetics

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