Journal Article

Evidence for complex multigenic inheritance of radiation AML susceptibility in mice revealed using a surrogate phenotypic assay

F. Darakhshan, C. Badie, J. Moody, M. Coster, R. Finnon, P. Finnon, A.A. Edwards, M. Szłuińska, C.J. Skidmore, K. Yoshida, R. Ullrich, R. Cox and S.D. Bouffler

in Carcinogenesis

Volume 27, issue 2, pages 311-318
Published in print February 2006 | ISSN: 0143-3334
Published online August 2005 | e-ISSN: 1460-2180 | DOI: http://dx.doi.org/10.1093/carcin/bgi207
Evidence for complex multigenic inheritance of radiation AML susceptibility in mice revealed using a surrogate phenotypic assay

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The mapping of genes which affect individual cancer risk is an important but complex challenge. A surrogate assay of susceptibility to radiation-induced acute myeloid leukaemia (AML) in the mouse based on chromosomal radiosensitivity has been developed and validated. This assay was applied to the mapping of radiation-induced AML risk modifier loci by association with microsatellite markers. A region on chromosome (chr) 18 with strong association is identified and confirmed by backcross analysis. Additional loci on chrs 8 and 13 show significant association. A key candidate gene Rbbp8 on chr18 is identified. Rbbp8 is shown to be upregulated in response to X-irradiation in the AML sensitive CBA strain but not AML resistant C57BL/6 strain. This study demonstrates the strength of utilizing surrogate endpoints of cancer susceptibility in the mapping of mouse loci and identifies additional loci that may affect radiation cancer risk.

Keywords: AML, acute myeloid leukaemia; chr, chromosome; LOH, loss of heterozygosity; Tm, melting temperatures; RT–qPCR, real-time–quantitative PCR; SNP, single nucleotide polymorphism

Journal Article.  6933 words.  Illustrated.

Subjects: Clinical Cytogenetics and Molecular Genetics

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