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      Ovulation Induced by Norepinephrine in Rats Made Anovulatory by Various Experimental Procedures

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          Abstract

          An intraventricular injection of 100 µg of norepinephrine (NE), but not of dopamine, induced ovulation in more than 50 % of rats made anovulatory by electrolytic lesions in the anterior hypothalamus. Ovulation also occurred 2 days after an intraventricular injection of 50 µg of NE in more than 50 % of rats made anovulatory by exposure to continuous illumination. The percentage of rats which ovulated after the intraventricular injection of 100 µg of NE was much lower in rats made anovulatory by a frontal cut in the anterior hypothalamus or by the neonatal administration of testosterone than in rats made anovulatory from either anterior hypothalamic lesions or continuous illumination. The results of this experiment suggest that when they are stimulated by NE the LRF-producing neurons in rats made anovulatory by various experimental procedures do synthesize and release LRF in an amount sufficient to induce ovulation.

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          Author and article information

          Journal
          NEN
          Neuroendocrinology
          10.1159/issn.0028-3835
          Neuroendocrinology
          S. Karger AG
          0028-3835
          1423-0194
          1974
          1974
          25 March 2008
          : 15
          : 6
          : 346-354
          Affiliations
          Department of Anatomy, University Medical School, Pécs
          Article
          122325 Neuroendocrinology 1974;15:346–354
          10.1159/000122325
          4215986
          © 1974 S. Karger AG, Basel

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          Pages: 9
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