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Identification of novel carcinogen-mediated mammary tumor susceptibility loci in the rat using the chromosome substitution technique
Karolinska Inst, Dept Mol Med & Surg, S-17176 Stockholm, Sweden.
Med Coll Wisconsin, Dept Surg, Milwaukee, WI 53226 USA.
Med Coll Wisconsin, Dept Biostat, Dept Populat Hlth, Milwaukee, WI 53226 USA.
Örebro University, School of Science and Technology.
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2010 (English)In: Genes, Chromosomes and Cancer, ISSN 1045-2257, E-ISSN 1098-2264, Vol. 49, no 11, p. 1035-1045Article in journal (Refereed) Published
Abstract [en]

We here report the genetic basis for susceptibility and resistance to carcinogen-mediated [7,12-dimethylbenz[a] anthracene (DMBA)] mammary tumorigenesis using the full panel of SS/BN consomic rat strains, in which substitutions of individual chromosomes from the resistant BN strain onto the genomic background of the susceptible SS strain were made. Analysis of 252 consomic females identified rat mammary Quantitative Trait Loci (QTLs) affecting tumor incidence on chromosomes 3 and 5, latency on chromosomes 3, 9, 14, and 19, and multiplicity on chromosomes 13, 16, and 19. In addition, we unexpectedly identified a novel QTL on chromosome 6 controlling a lethal toxic phenotype in response to DMBA. Upon further investigation with chromosomes 6 and 13 congenic lines, in which an additional 114 rats were investigated, we mapped (1) a novel mammary tumor QTL to a region of 27.1 Mbp in the distal part of RNO6, a region that is entirely separated from the toxicity phenotype, and (2) a novel and powerful mammary tumor susceptibility locus of 4.5 Mbp that mapped to the proximal q-arm of RNO13. Comparison of genetic strain differences using existing rat genome databases enabled us to further construct priority lists containing single breast cancer candidate genes within the defined QTLs, serving as potential functional variants for future testing.

Place, publisher, year, edition, pages
Hoboken, USA: John Wiley & Sons, 2010. Vol. 49, no 11, p. 1035-1045
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Chemical Sciences
Research subject
Chemistry
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URN: urn:nbn:se:oru:diva-12875DOI: 10.1002/gcc.20812ISI: 000282188000007OAI: oai:DiVA.org:oru-12875DiVA: diva2:383480
Available from: 2011-01-05 Created: 2011-01-03 Last updated: 2017-12-11Bibliographically approved

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Adamovic, Dragan

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