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Prolactin messenger ribonucleic acid concentrations throughout the ovine estrous cycle: assessment relative to prolactin serum and pituitary amounts



Prolactin messenger ribonucleic acid concentrations throughout the ovine estrous cycle: assessment relative to prolactin serum and pituitary amounts



Life Sciences 48(12): 1179-1184



Prolactin (PRL) mRNA concentrations were assessed by nucleic acid hybridization assays in pituitaries of ewes representing the defined stages of the ovine estrous cycle. Concomitantly, pituitary and serum PRL concentrations were measured in these ewes using radioimmunoassays. It was observed that PRL serum, pituitary and mRNA concentrations tended to increase near the time of the gonadotropin preovulatory surge, particularly between 24 hrs before behavioral estrus to 5 hours after estrus. However, the changes in PRL mRNA, serum and pituitary concentrations were shown not to be statistically significant. These data suggest that PRL production during the sheep estrous cycle is maintained without dramatic changes in synthesis or secretion.

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Accession: 013177924

Download citation: RISBibTeXText

PMID: 2002749

DOI: 10.1016/0024-3205(91)90456-l


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