Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Genetic differences in transcript responses to low-dose ionizing radiation identify tissue functions associated with breast cancer susceptibility.

ABSTRACT: This study investigates three radiation exposure scenarios in BALB/c and C57BL/6 mice: (1) low dose (LD) group -- four weekly doses of 7.5 cGy, (2) high dose (HD) group -- four weekly doses of 1.8 Gy, (3) unexposed group -- four weekly sham exposures. We then used comparative expression profiles of the mouse mammary gland and cardiac blood to build a model of candidate tissue functions associated with LD cancer susceptibility in these strains and murine and human knowledgebases to characterize these tissue functions and their relevance to breast cancer. All samples were assessed on Affymetrix MOE 430 A arrays (HT_MG-430A; GPL8759). Mammary gland tissues: 43 samples (2 strains, 3 treatments, 2 timepoints, 2-4 replicates). For Cardiac blood tissue: 8 samples (2 strains, 4 replicates)

ORGANISM(S): Mus musculus

SUBMITTER: Antoine Snijders 

PROVIDER: E-GEOD-40066 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Genetic differences in transcript responses to low-dose ionizing radiation identify tissue functions associated with breast cancer susceptibility.

Snijders Antoine M AM   Marchetti Francesco F   Bhatnagar Sandhya S   Duru Nadire N   Han Ju J   Hu Zhi Z   Mao Jian-Hua JH   Gray Joe W JW   Wyrobek Andrew J AJ  

PloS one 20121015 10

High dose ionizing radiation (IR) is a well-known risk factor for breast cancer but the health effects after low-dose (LD, <10 cGy) exposures remain highly uncertain. We explored a systems approach that compared LD-induced chromosome damage and transcriptional responses in strains of mice with genetic differences in their sensitivity to radiation-induced mammary cancer (BALB/c and C57BL/6) for the purpose of identifying mechanisms of mammary cancer susceptibility. Unirradiated mammary and blood  ...[more]

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