Vinyltestosterone Explained

Vinyltestosterone (also known as 17α-vinyltestosterone, 17α-vinylandrost-4-en-17β-ol-3-one, and 17α-hydroxypregna-4,20-dien-3-one) is a synthetic anabolic–androgenic steroid (AAS) that was never marketed.[1] [2] However, two 19-nortestosterone derivatives of vinyltestosterone, norvinisterone (17α-vinyl-19-nortestosterone) and norgesterone (17α-vinyl-δ5(10)-19-nortestosterone), have been marketed.[3] They are used as progestins for female hormonal contraception, rather than as AAS.

Vinyltestosterone is a relatively weak AAS.[4] [5] In one study, it showed approximately one-third and one-fifth of the respective androgenic and anabolic activity of other AAS such as nandrolone (19-nortestosterone), methyltestosterone (17α-methyltestosterone), and ethyltestosterone (17α-ethyltestosterone) in castrated male rats, whereas ethisterone (17α-ethynyltestosterone) showed almost no androgenic and anabolic activity (only 1/20 the anabolic potency of vinyltestosterone). Additionally, in women with metastatic breast cancer, vinyltestosterone was found to be ineffective in treating the disease (unlike other AAS such as testosterone propionate or fluoxymesterone)[6] and produced little or no virilization in the women at a dosage of 100 mg intramuscularly three times per week.[7] [8]

See also

Notes and References

  1. Book: Hill RA,((Makin HLJ)), Kirk DN, Murphy GM. Dictionary of Steroids. 23 May 1991. CRC Press. 978-0-412-27060-4. 226–.
  2. Lewis RA, DeMAJO S, Rosemberg E . The effects of 17-vinyl testosterone upon the rat adrenal . Endocrinology . 45 . 6 . 564–570 . December 1949 . 15402199 . 10.1210/endo-45-6-564 .
  3. Book: Elks J . The Dictionary of Drugs: Chemical Data: Chemical Data, Structures and Bibliographies. 14 November 2014. Springer. 978-1-4757-2085-3. 887, 889.
  4. Saunders FJ, Drill VA . The myotrophic and androgenic effects of 17-ethyl-19-nortestosterone and related compounds . Endocrinology . 58 . 5 . 567–572 . May 1956 . 13317831 . 10.1210/endo-58-5-567 .
  5. Schedl HP, Delea C, Bartter FC . Structure-activity relationships of anabolic steroids: role of the 19-methyl group . The Journal of Clinical Endocrinology and Metabolism . 19 . 8 . 921–935 . August 1959 . 14442516 . 10.1210/jcem-19-8-921 . 17α-Vinyltestosterone in large doses manifested weak myotropic and androgenic activities in castrated male rats (1) and proved to be ineffective in the therapy of patients with metastatic breast cancer, in whom it had little or no virilizing effect at a dosage level of 100 mg. intramuscularly three times a week (18). .
  6. Book: Drill VA . Physiology and Pharmacology of Steroids Affecting Tumor Growth . Pincus G, Vollmer EP . Biological Activities of Steroids in Relation to Cancer: Proceedings of a Conference Sponsored by the Cancer Chemotherapy National Service Center, National Cancer Institute, National Institutes of Health, U. S. Department of Health, Education and Welfare. https://books.google.com/books?id=TLHfBAAAQBAJ&pg=PA26. 17 September 2013. Elsevier Science. 978-1-4832-7057-9. 26–.
  7. Segaloff A, Gordon DL, Horwitt BN, Murison PJ, Schlosser JV . Hormonal therapy in cancer of the breast. X. The effect of vinyltestosterone therapy on clinical course and hormonal excretion . Cancer . 8 . 5 . 903–905 . 1955 . 13261042 . 10.1002/1097-0142(1955)8:5<903::aid-cncr2820080509>3.0.co;2-u . 45406269 .
  8. Schedl HP, Delea C, Bartter FC . Structure-activity relationships of anabolic steroids: role of the 19-methyl group . The Journal of Clinical Endocrinology and Metabolism . 19 . 8 . 921–935 . August 1959 . 14442516 . 10.1210/jcem-19-8-921 .

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