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Sulphation of contraceptive steroids
Journal of Steroid Biochemistry
|November 1, 1983
Summary
Rabbit tissues in vitro can sulfate contraceptive steroids like synthetic gestagens and ethynyloestradiol. This study confirms previous in vivo findings on steroid sulfate conjugates.
Area of Science:
- Pharmacology
- Biochemistry
- Drug Metabolism
Background:
- Contraceptive steroids undergo metabolic transformations in the body.
- Sulphation is a key metabolic pathway for steroid conjugation.
- Understanding steroid metabolism is crucial for drug development and efficacy.
Purpose of the Study:
- To investigate the in vitro sulphation of various contraceptive steroids using rabbit tissues.
- To identify which tissues are capable of sulphating these compounds.
- To compare the sulphation rates of different synthetic steroids.
Main Methods:
- Incubation of contraceptive steroids with different rabbit tissue preparations in vitro.
- Analysis of steroid sulphation products using appropriate biochemical assays.
- Comparison of sulphation rates with a known sulphated steroid, dehydroepiandrosterone.
Main Results:
- Liver tissue sulphated synthetic gestagens (norethisterone, norgesterel, lynestrenol) at the 17 beta-hydroxyl group, but slower than dehydroepiandrosterone.
- Ethynyloestradiol was sulphated more rapidly than dehydroepiandrosterone, forming mono- and disulphates.
- Stomach and lung tissues showed sulphation activity, while heart, spleen, muscle, kidney, and adipose tissue did not.
Conclusions:
- Rabbit liver, stomach, and lung tissues can perform sulphation of contraceptive steroids in vitro.
- The findings in vitro corroborate previously observed in vivo sulphation patterns.
- This research provides insights into the metabolic fate of contraceptive steroids.