Yasinska I. Purification, catalytic properties and activity regulation mechanisms of cytochrome P450 aromatase

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0402U000809

Applicant for

Specialization

  • 03.00.04 - Біохімія

18-03-2002

Specialized Academic Board

Д 26.001.24

Taras Shevchenko National University of Kyiv

Essay

Research object: сytochrome P450 aromatase, rats, healthy people. To study the in vitro effects of reductors-antioxidants, cortisol, polychlorinated biphenyls, genistein and quercetin on the aromatase activity and in vivo effects of some of them on the enzyme activity and estrogen formation. Methods: affinity precipitation, spectrophotometry, electrophoresis, centrifugation. Established that antioxidants are the aromatase activators and polychlorinated byphenyls as well as genistein and quercetin are its inhibitors in the in vitro and in vivo studies. Cortisol activates aromatase only in vivo. Activity of aromatase, nitric oxide synthase and S-nitrosothiols quantity were found to be decreased in rat organism under conditions of oxidative stress. These data are significant for studies of estrogen biosynthesis regulation. Field of application - scientific institutions for medical and biological studies.

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