Uterine glutathione reductase activity: Modulation by estrogens and progesterone
| Autor: | M. Díaz-Flores, N.N. Pedrón, Juan José Hicks, Luis Arturo Baiza-Gutman |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
medicine.medical_specialty
Antioxidant medicine.drug_class Ovariectomy medicine.medical_treatment Glutathione reductase Uterus GPX5 General Biochemistry Genetics and Molecular Biology Rats Sprague-Dawley chemistry.chemical_compound Internal medicine medicine Animals General Pharmacology Toxicology and Pharmaceutics Progesterone Estradiol biology DNA General Medicine Glutathione Enzyme assay Rats Glutathione Reductase medicine.anatomical_structure Endocrinology chemistry Estrogen biology.protein Drug Therapy Combination Female Hormone |
| Zdroj: | Life Sciences. 65:2481-2488 |
| ISSN: | 0024-3205 |
| DOI: | 10.1016/s0024-3205(99)00514-7 |
| Popis: | The aim of this study was to determine whether glutathione reductase activity in uterine tissue is regulated by sex hormones. In spayed rats uterine glutathione reductase was significantly increased by exogenous estrogen (P < 0.01), progesterone (P < 0.01) or estrogen plus progesterone (P < 0.01). When enzyme activity is expressed per mg protein, daily administration of estrogen or progesterone induces a progressive increase of this enzyme between 24 to 48 h or 24 to 72 h of treatment, respectively. Whereas the combination of both steroids causes an earlier and higher increase in glutathione reductase activity at 24 h of treatment. Estradiol singly or in combination with progesterone induced the highest protein concentration in the uterus. Whereas uterine DNA concentration is only significantly affected by estradiol. Our results suggest that uterine glutathione reductase is regulated by estradiol and progesterone and may be involved in maintaining levels of reduced glutathione in the uterus. This compound may be required for control of the redox state of thiol groups and in detoxification reactions involving H2O2 and electrophylic substanses. The antioxidant action of estrogens is partially due to the stimulation of glutathione reductase. |
| Databáze: | OpenAIRE |
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