The general objective of this project is to develop a chemical induction model in rats for prostatic carcinogenesis.
The specific aims are: 1) To adapt an existing experimental approach for induction of adenocarcinomas of the rat dorsolateral prostate prostatic carcinogenesis for use in a generally available rat strain (LEW-strain). The approach consists of sequential treatment with cyproterone acetate (CA) and testosterone propionate (TP) which leads to a wave of cell proliferation in the prostate. This is followed by a single treatment with methylnitrosourea (NMU) or ethylnitrosourea (ENU) during the maximum of the cell proliferative activity. 2) To optimize the protocol for induction of prostatic cancer by determining the conditions needed for optimal cell proliferative response to CA and TP (measured by 3H-thymidine incorporation followed by autoradiography). 3) To study the correlation between time of carcinogen injection and time of maximal cell proliferation, in terms of (a) the final tumor response, and (b) the formation and disappearance of major fluorescent DNA adducts (7-alkylguanine and O6-alkylguanine) as measured by HPLC separation and fluorescence detection. 4) To study the morphology of preneoplastic and early neoplastic lesions in the prostate upon CA-TP-E/MNU treatment in serial-killing experiments. 5) To study the behaviour of the induced prostatic carcinomas upon transplantation into syngeneic rats, in particular their androgen-dependance. For this purpose, tumors will be transplanted into intact, castrated and androgen-treated rats.

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Research Project (R01)
Project #
2R01CA043151-04
Application #
3185130
Study Section
Chemical Pathology Study Section (CPA)
Project Start
1986-09-01
Project End
1994-05-31
Budget Start
1989-09-01
Budget End
1990-05-31
Support Year
4
Fiscal Year
1989
Total Cost
Indirect Cost
Name
New York University
Department
Type
Schools of Medicine
DUNS #
004514360
City
New York
State
NY
Country
United States
Zip Code
10012
Bosland, Maarten C (2014) Testosterone treatment is a potent tumor promoter for the rat prostate. Endocrinology 155:4629-33
Condon, M S; Kaplan, L A; Crivello, J F et al. (1999) Multiple pathways of prostate carcinogenesis analyzed by using cultured cells isolated from rats treated with N-methyl-N-nitrosourea and testosterone. Mol Carcinog 25:179-86
Condon, M S; Bosland, M C (1999) The role of stromal cells in prostate cancer development and progression. In Vivo 13:61-5
Bosland, M C (1996) Hormonal factors in carcinogenesis of the prostate and testis in humans and in animal models. Prog Clin Biol Res 394:309-52
Bosland, M C (1992) Possible enhancement of prostate carcinogenesis by some chemopreventive agents. J Cell Biochem Suppl 16H:135-7
Bosland, M C (1992) Animal models for the study of prostate carcinogenesis. J Cell Biochem Suppl 16H:89-98
Sukumar, S; Armstrong, B; Bruyntjes, J P et al. (1991) Frequent activation of the Ki-ras oncogene at codon 12 in N-methyl-N-nitrosourea-induced rat prostate adenocarcinomas and neurogenic sarcomas. Mol Carcinog 4:362-8
Bosland, M C; Dreef-Van Der Meulen, H C; Sukumar, S et al. (1991) Multistage prostate carcinogenesis: the role of hormones. Princess Takamatsu Symp 22:109-23
Bosland, M C (1988) The etiopathogenesis of prostatic cancer with special reference to environmental factors. Adv Cancer Res 51:1-106