Abstract
The density of high-affinity melatonin receptors in the pars tuberalis of different long day breeders exhibits a seasonal variation, with high values in spring-summer and low values in autumn-winter. In all the studies, this decrease in receptor density was always associated with both a short photoperiod and sexual inactivity. Moreover, during the hibernation period, the reduction in receptor number was more marked in hypothermic than in normothermic animals. These seasonal changes in melatonin receptors were restricted to the pars tuberalis, which suggests that this structure represents an important target site for mediation of the photoperiodic effect of melatonin on seasonal functions. The mechanism of melatonin action at this level is discussed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
