neoplasm
• mice treated with slow release medroxyprogesterone acetate plus 7, 12-dimethylbenz(a)anthracene (DMBA) show enhanced susceptibility to mammary tumor development compared to treated controls, with tumors detected earlier, larger volumes and weights of mammary tumors, and greater number of lesions per bilateral gland
• however, mice do not develop spontaneous tumors and show normal mammary gland development in virgin mice and involution at day 4 of weaning is normal
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• mice treated with DMBA show accelerated mammary tumor development, with first tumor detected at week 13 compared to week 14 in DMBA-treated wild-type mice
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mortality/aging
• DMBA-treated mice show shorter overall survival with a mean overall survival of 18.5 weeks compared to 20.75 weeks for controls due to breast cancer
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hematopoietic system
• 61% of livers from DMBA-treated mutants show lymphocyte infiltration in the liver compared to 29% of wild-type livers
• massive all organ encompassing lymphoid infiltrations are seen in both livers and lungs in 20.8% of DMBA-treated mutants compared to 8.3% of treated wild-type mice
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immune system
• 61% of livers from DMBA-treated mutants show lymphocyte infiltration in the liver compared to 29% of wild-type livers
• massive all organ encompassing lymphoid infiltrations are seen in both livers and lungs in 20.8% of DMBA-treated mutants compared to 8.3% of treated wild-type mice
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homeostasis/metabolism
• mice treated with slow release medroxyprogesterone acetate plus 7, 12-dimethylbenz(a)anthracene (DMBA) show enhanced susceptibility to mammary tumor development compared to treated controls, with tumors detected earlier, larger volumes and weights of mammary tumors, and greater number of lesions per bilateral gland
• however, mice do not develop spontaneous tumors and show normal mammary gland development in virgin mice and involution at day 4 of weaning is normal
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