Cyclic variation of oxytocin in the blood of pituitary portal vessels of rats

D. K. Sarkar, D. M. Gibbs

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Abstract

The release of oxytocin (OT) into pituitary portal blood during the estrous cycle was studied in female rats under Althesin anesthesia. On each afternoon of the 4-day estrous cycle, animals were anesthetized with Althesin, and pituitary portal blood samples were collected. The concentration of OT in portal plasma collected between 14.00 and 16.00 h of proestrus (1,079 ± 185 pg/ml) was significantly higher than that at any other time studied. There were no appreciable differences between the mean OT concentration on the days of estrus (198 ± 29 pg/ml), metestrus (283 ± 55 pg/ml), and diestrus (267 ± 49 pg/ml). The concentration of OT in pituitary portal plasma was also greater than that in blood withdrawn from the external jugular vein (

Original languageEnglish (US)
Pages (from-to)481-483
Number of pages3
JournalNeuroendocrinology
Volume39
Issue number5
StatePublished - 1984

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Oxytocin
Alfaxalone Alfadolone Mixture
Estrous Cycle
Metestrus
Diestrus
Proestrus
Jugular Veins
Estrus
Anesthesia

ASJC Scopus subject areas

  • Endocrinology
  • Neuroscience(all)

Cite this

Cyclic variation of oxytocin in the blood of pituitary portal vessels of rats. / Sarkar, D. K.; Gibbs, D. M.

In: Neuroendocrinology, Vol. 39, No. 5, 1984, p. 481-483.

Research output: Contribution to journalArticle

Sarkar, D. K. ; Gibbs, D. M. / Cyclic variation of oxytocin in the blood of pituitary portal vessels of rats. In: Neuroendocrinology. 1984 ; Vol. 39, No. 5. pp. 481-483.
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