Date of Defense
Spring 4-10-1977
Department
Biological Sciences
First Advisor
Leonard Beuving
Abstract
The purpose of this study was to determine the likelihood of a role of aryl hydrocarbon [benzo(a)pryene] hydroxylase (AHH) activity in 7,12-deimethylbenz(a)anthracene (DMBA) induced carcinogensis. To test this hypothesis, drugs known to be inducers and inhibitors of AHH were administered concurrently with DMBA. The following treatment groups were established: oil-control, chrysene-control, DMBA, DMBA+benzoflavone (BF), an inhibitor, DMBA+pyrene, an inducer, and DMBA+chrysene, an inducer. Latency period, growth rate, and incidence of tumors was observed. THe abdominal-inguinal glands were removed and observed for hyperplastic alveolar nodules, hyperplastic areas, and small tumors. It was shown that the inducers of AHH activity, pyrene and chrysene, decreased tumor incidence and increased latency period as compared to controls. The group treated with BF, an inhibitor of AHH, was similar to controls. The incidence of hyperplastic alveolar nodules, growth rate and regression due to overiectomy were the same for all groups. This imples that pyrene and chrysene affect only the initiation phase of DMBA-induced carcinogensis.
Recommended Citation
Sallwasser, Kathleen, "The Effects of Aryl Hydrocarbon [Benzo(a)Pyrene] Hydroylase Inhibitors and Inducers on 7,12-Dimethylbenz(a)Anthracene Induced Mammary Gland Hyperplastic Lesions and Tumors in Rats" (1977). Honors Theses. 248.
https://scholarworks.wmich.edu/honors_theses/248
Access Setting
Honors Thesis-Campus Only