To understand the role of metabolism of estradiol in the biology of the hormone it is essential to know the biological effects of its diverse metabolic products. This project is concerned with the cellular interactions of 16Alpha-hydroxyestrone and 2-hydroxyestrone, major metabolites of estradiol with biological properties distinct from those of the parent hormone. 16Alpha-hydroxyestrone forms covalent linkages with primary amino groups via Schiff base formation and subsequent Heyns rearrangement. 2-Hydroxyestrone reacts avidly with nucleophiles such as sulfhydryl groups to also form covalent bonds with biological molecules. Both processes have been shown to proceed with cellular components in vitro and in vivo and are considered to be of importance in the physiology and pathophysiology of estrogen action. Precise information will be sought on the subcellular sites of such covalent bond formation in estrogen target tissues and on the nature of the specific biological macromolecules involved in these interactions. The biological consequence of these processes will be explored in in vitro and in vivo studies employing appropriate experimental models. It is expected that these studies will shed light on the role of these natural estrogens in hormonally linked diseases.

Agency
National Institute of Health (NIH)
Institute
Eunice Kennedy Shriver National Institute of Child Health & Human Development (NICHD)
Type
Research Project (R01)
Project #
1R01HD019825-01
Application #
3317424
Study Section
Biochemical Endocrinology Study Section (BCE)
Project Start
1984-12-01
Project End
1987-11-30
Budget Start
1984-12-01
Budget End
1985-11-30
Support Year
1
Fiscal Year
1985
Total Cost
Indirect Cost
Name
Rockefeller University
Department
Type
Graduate Schools
DUNS #
071037113
City
New York
State
NY
Country
United States
Zip Code
10065
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Swaneck, G E; Fishman, J (1991) Effects of estrogens on MCF-7 cells: positive or negative regulation by the nature of the ligand-receptor complex. Biochem Biophys Res Commun 174:276-81
Niwa, T; Bradlow, H L; Fishman, J et al. (1990) Induction and inhibition of estradiol hydroxylase activities in MCF-7 human breast cancer cells in culture. Steroids 55:297-302
Niwa, T; Bradlow, H L; Fishman, J et al. (1989) Determination of estradiol 2- and 16-alpha-hydroxylase activities in MCF-7 human breast cancer cells in culture using radiometric analysis. J Steroid Biochem 33:311-4
Swaneck, G E; Fishman, J (1988) Covalent binding of the endogenous estrogen 16 alpha-hydroxyestrone to estradiol receptor in human breast cancer cells: characterization and intranuclear localization. Proc Natl Acad Sci U S A 85:7831-5
Jellinck, P H; Fishman, J (1988) Activation and irreversible binding of regiospecifically labeled catechol estrogen by rat liver microsomes: evidence for differential cytochrome P-450 catalyzed oxidations. Biochemistry 27:6111-6
Gierthy, J F; Lincoln 2nd, D W; Kampcik, S J et al. (1988) Enhancement of 2- and 16 alpha-estradiol hydroxylation in MCF-7 human breast cancer cells by 2,3,7,8-tetrachlorodibenzo-P-dioxin. Biochem Biophys Res Commun 157:515-20
Fishman, J; Hershcopf, R J; Bradlow, H L (1986) Biochemical epidemiology of breast cancer. Prog Clin Biol Res 204:91-103
Jellinck, P H; Hahn, E F; Fishman, J (1986) Absence of reactive intermediates in the formation of catechol estrogens by rat liver microsomes. J Biol Chem 261:7729-32
Yu, S C; Fishman, J (1985) Interaction of histones with estrogens. Covalent adduct formation with 16 alpha-hydroxyestrone. Biochemistry 24:8017-21