Short communicationA significant participation of orexin-A, a potent orexigenic peptide, in the preovulatory luteinizing hormone and prolactin surges in the rat
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Acknowledgements
We wish to thank the National Hormone and Pituitary Program of NIDDK and Dr. A.F. Parlow for the generous donation of reagents for rat PRL and LH RIAs. Helgi B. Schiöth was supported by the Swedish Society for Medical Research and the Åke Wiberg foundation.
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Orexin A enhances food intake in bullfrog larvae
2014, PeptidesCitation Excerpt :The orexin receptor has been found to have two forms: orexin receptors 1 and 2 (OX1R and OX2R) [27,34,43]. In mammals including human beings and rodents, orexin also controls multiple brain functions including emotional behavior and rhythmicity such as the sleep-wakefulness cycle in addition to appetite [4,9,10,13,25–28,36,42]. The orexin gene or cDNA has also been characterized in non-mammalian species [8,23,34,43].
Orexin A enhances locomotor activity and induces anxiogenic-like action in the goldfish, Carassius auratus
2014, Hormones and BehaviorInfluence of season and nutritional status on the direct effects of leptin, orexin-A, and ghrelin on luteinizing hormone and growth hormone secretion in the ovine pituitary explant model
2014, Domestic Animal EndocrinologyCitation Excerpt :The key regulatory agents include peptides with orexigenic properties such as ghrelin and orexin-A as well as peptides with anorexigenic properties (eg, leptin) that jointly “inform” the central nervous system about the current nutritional status [7–9]. Reduction in the pulsatile secretion of LH caused by nutritional restrictions can be reversed by leptin administration in sheep and cattle [10,11], and by orexin-A in female rats [12]. Leptin and ghrelin regulate GH secretion in both the negative and the positive energy balance states in sheep [10,13].