Changes in bioactive prolactin-like activity in plasma and its relationship to incubation behavior in breeding ring doves

General and Comparative Endocrinology
J D BuntinJ G Scammell

Abstract

Previous radioimmunoassay (RIA) data indicate that plasma prolactin (PRL) is elevated during the late incubation and the early posthatching periods of the ring dove breeding cycle. Although these changes are temporally associated with changes in PRL-dependent crop sac growth, the precise relationship between immunoreactive and bioactive PRL has not been directly examined. To investigate this question and to further explore the relationship between sitting behavior and PRL secretion, we used rat Nb2 lymphoma cell proliferation to estimate the concentration of bioactive PRL-like activity (PLA) in the plasma of breeding ring doves. Serial dilutions of dove pituitary homogenate and dove plasma stimulated mitogenic responses that were parallel to those observed with purified ovine PRL. Changes in plasma PLA during the breeding cycle closely resembled changes in PRL that have been previously reported by RIA, although the relative changes in PLA were more pronounced. In both sexes, PLA remained at basal levels prior to egg laying and during early incubation (Day 4-5) but then abruptly increased to reach peak values near the time of hatching (Day 14-15). Activity remained high for 3-4 days after hatching, declined gradually thereafter,...Continue Reading

Citations

Nov 26, 2009·General and Comparative Endocrinology·Nanette VerbovenNeil P Evans
Nov 23, 2006·Journal of Sleep Research·Timothy C RothSteven L Lima
Oct 7, 2004·Hormones and Behavior·Kristin A KochJohn D Buntin
Mar 30, 2004·Hormones and Behavior·Michelle Pellissier Scott, S Carmen Panaitof
Jan 1, 2008·The Veterinary Clinics of North America. Exotic Animal Practice·Christoph Mans, W Michael Taylor
Nov 14, 2016·Hormones and Behavior·Ondi L CrinoSimon C Griffith

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