Antiestrogenic and antifertility actions of anordrin (2α,17ga-diethynyl-A-nor-5α-androstane-2β,17β-diol 2,17-dipropionate)

R. R. Mehta*, J. M. Jenco, Robert Treat Chatterton Jr

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Anordrin, administered in a single s.c. dose of 62.5 μg in sesame oil, stimulated sustained uterine growth (wet weight) when measured at 24 and 72 hr, but total soluble protein and total DNA per uterus was not increased. By comparison, 3 μg of estradiol-17β under the same conditions significantly increased all three parameters of uterine growth. Both of the above steroid treatments significantly increased nuclear estrogen receptor content of the uterus, but only the estradi-ol-17β treatment resulted in significantly elevated cytosol receptor content per uterus. Anordrin binds to the 8S estrogen receptor with an affinity of about 2 × 105 M-1 as determined by competition with [3H]estradiol-17β. The abortifacient activity of Anordrin when given orally (8 mg/kg b.w.) to mice on the 7th day of pregnancy was almost completely blocked by simultaneous oral administration of estradiol-17β (0.8 mg/kg b.w.). It is concluded that the actions of Anordrin on the uterus can be attributed to its antiestrogenic activities.

Original languageEnglish (US)
Pages (from-to)679-691
Number of pages13
Issue number6
StatePublished - Jan 1 1981

ASJC Scopus subject areas

  • Biochemistry
  • Medicine(all)
  • Molecular Biology
  • Endocrinology
  • Pharmacology
  • Clinical Biochemistry
  • Organic Chemistry

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