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Frequent mutations of the Trp53,Hras1 and beta-catenin (Catnb) genes in 1,3-butadiene-induced mammary adenocarcinomas in B6C3F1 mice
Linköping University, Faculty of Health Sciences. Linköping University, Department of Biomedicine and Surgery, Cell biology.
Linköping University, Faculty of Health Sciences. Linköping University, Department of Biomedicine and Surgery, Cell biology.
2002 (English)In: Oncogene, ISSN 0950-9232, Vol. 21, no 36, 5643-5648 p.Article in journal (Refereed) Published
Abstract [en]

DNAs from 1,3-butadiene-induced mammary adenocarcinomas of B6C3F1 mice were examined for mutations in the Trp53 gene, the ras gene family and several components of the Wnt signaling pathway, including ▀-catenin (Catnb), Apc and Axin. Trp53 mutations were detected in 41% (7 out of 17) of tumors. Each tumor with a Trp53 mutation also exhibited loss of the wildtype Trp53 allele, supporting the importance of Trp53 inactivation during development of these tumors. Analyses of the Hras1, Kras2 and Aras proto-oncogenes revealed Hras1 mutations in 53% (9 out of 17) of tumors. Seven of these mutations were a G?C transversion in Hras1 codon 13, consistent with a 1,3-butadiene-specific Kras2 mutation previously reported in several other tumor types. Mutation screens in Catnb exon 2, the Apc mutation cluster region and the Catnb-binding domain of the Axin gene identified Catnb missense mutations in 3 out of 17 (18%) tumors. In total, mutations of the Trp53, Hras1 and/or Catnb genes were identified in 15 out of 17 1,3-butadiene-induced mammary adenocarcinomas. These results indicate that multiple genetic pathways are disrupted in chemically induced mammary tumors, and that studies in mouse models may help to understand the etiology of human breast cancers.

Place, publisher, year, edition, pages
2002. Vol. 21, no 36, 5643-5648 p.
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Medical and Health Sciences
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URN: urn:nbn:se:liu:diva-25415DOI: 10.1038/sj.onc.1205649Local ID: 9859OAI: oai:DiVA.org:liu-25415DiVA: diva2:245744
Available from: 2009-10-07 Created: 2009-10-07 Last updated: 2011-01-13

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Zhuang, Shi-MeiSöderkvist, Peter

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