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Candidate lung tumor susceptibility genes identified through whole-genome association analyses in inbred mice

Nature Genetics volume 38, pages 888–895 (2006)Cite this article

Abstract

We performed a whole-genome association analysis of lung tumor susceptibility using dense SNP maps (∼1 SNP per 20 kb) in inbred mice. We reproduced the pulmonary adenoma susceptibility 1 (Pas1) locus identified in previous linkage studies and further narrowed this quantitative trait locus (QTL) to a region of less than 0.5 Mb in which at least two genes, Kras2 (Kirsten rat sarcoma oncogene 2) and Casc1 (cancer susceptibility candidate 1; also known as Las1), are strong candidates. Casc1 knockout mouse tumor bioassays showed that Casc1-deficient mice were susceptible to chemical induction of lung tumors. We also found three more genetic loci for lung adenoma development. Analysis of one of these candidate loci identified a previously uncharacterized gene Lasc1, bearing a nonsynonymous substitution (D102E). We found that the Lasc1 Glu102 allele preferentially promotes lung tumor cell growth. Our findings demonstrate the prospects for using dense SNP maps in laboratory mice to refine previous QTL regions and identify genetic determinants of complex traits.

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Figure 1: The mouse SNP map.
Figure 2: Establishing empirical thresholds for whole-genome association analysis.
Figure 3: Whole-genome association analysis of urethane-induced lung adenoma incidence in laboratory inbred mice.
Figure 4: Comparison of linkage and LD mapping of the mouse pulmonary adenoma susceptibility locus 1 (Pas1).
Figure 5: Positional cloning of the Clas2 locus.
Figure 6: LD map of the Clas2 locus associated with lung tumor adenoma development.
Figure 7: Lung tumorigenesis of Casc1 knockout mice.
Figure 8: Lasc1 (previously known as 4931422A14) promotes cell growth.

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Acknowledgements

We thank M. Daly at The Broad Institute of Harvard/Massachusetts General Hospital and MIT, the Wellcome Trust Center for Human Genetics, and Perlegen Sciences for releasing inbred laboratory mouse SNP data. We thank D. Jia and W. Wen for laboratory assistance. We also thank A. Malkinson for providing information on lung tumor multiplicity in mice. This work was supported by grants from the US National Institutes of Health (CA099187, CA099147, ES012063 and ES013340).

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Author notes

  1. Pengyuan Liu, Yian Wang, Haris Vikis and Anna Maciag: These authors contributed equally to this work.

Authors and Affiliations

  1. Department of Surgery and the Alvin J. Siteman Cancer Center, Washington University School of Medicine, St. Louis, 63110, Missouri, USA

    Pengyuan Liu, Yian Wang, Haris Vikis, Anna Maciag, Daolong Wang, Yan Lu, Yan Liu & Ming You

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Correspondence to Ming You.

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Supplementary information

Supplementary Fig. 1

Distribution of SNP positions and LD structure across the mouse genome. (PDF 103 kb)

Supplementary Fig. 2

Haplotype-based association analysis of urethane-induced lung adenoma incidence in laboratory inbred mice. (PDF 148 kb)

Supplementary Fig. 3

LD map of the Pas1 locus associated with lung tumor adenoma development. (PDF 135 kb)

Supplementary Fig. 4

Fine-mapping of the CLAS3 genetic locus. (PDF 137 kb)

Supplementary Fig. 5

LD map of the Pas1 locus associated with lung tumor adenoma development. (PDF 1151 kb)

Supplementary Fig. 6

Genomic organization and verification of Casc1 knockout mouse. (PDF 42 kb)

Supplementary Table 1

Mouse inbred strains and lung tumor susceptibility. (PDF 65 kb)

Supplementary Table 2

Primer sequences. (PDF 75 kb)

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Liu, P., Wang, Y., Vikis, H. et al. Candidate lung tumor susceptibility genes identified through whole-genome association analyses in inbred mice. Nat Genet 38, 888–895 (2006). https://doi.org/10.1038/ng1849

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