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Abstract Title:

Anti-ovulatory activity of H2 receptor blockers in albino rabbits--a preliminary study.

Abstract Source:

Eur J Contracept Reprod Health Care. 2011 Apr;16(2):142-6. Epub 2011 Jan 31. PMID: 21281096

Abstract Author(s):

S S Agrawal, M Alvin Jose

Article Affiliation:

Anti-fertility and Infertility Research Centre, Department of Pharmacology, Delhi Institute of Pharmaceutical Sciences and Research (DIPSAR), New Delhi, India.

Abstract:

OBJECTIVE: To evaluate the anti-ovulatory activity of H(2) receptor blockers (ranitidine, famotidine and roxatidine) in albino rabbits considering the role of histamine in ovulation.

METHOD: The drugs were orally administered once daily for three days to adult female rabbits weighing between 1.3-2.0 kg (four groups of three animals). The control group received the 1% weight/volume gum acacia suspension. Thirty minutes after the administration of the last dose, a freshly prepared 0.4 % solution of cupric acetate was administered to each animal intravenously via the marginal ear vein (4 mg/kg body weight) to induce ovulation. To assess ovulation, laparotomy was carried out 48 h after cupric acetate injection. The ovaries were exposed, bleeding points on each ovary were counted, and the ovaries and uteri were subjected to histopathological evaluation.

RESULTS: Based on the number of bleeding points (ovulation sites) observed on the ovary, H(2) blockers showed varying degrees of anti-ovulatory activity. Roxatidine exerted the most pronounced activity. Histopathological observations of uterus and ovary confirmed the aforementioned observations.

CONCLUSION: H(2) receptor blockers appeared to inhibit the cupric acetate-induced ovulation in albino rabbits. Our results seem to confirm the role of histamine in ovulation reported by other authors.

Study Type : Animal Study

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