...) in ovariectomized rats. However, the mechanisms underlying this action remain unclear. We examined the effects of naloxone (NAL), a specific opioid antagonist, on the suppression of pulsatile LH secretion by ghrelin to determine whether β-endorphin (β-END) is involved in this suppressive effect. Methods: Ghrelin...

... (E 2 V) on brain and plasma β-endorphin (β-END) concentrations in gonadectomized rats of both sexes. Methods: Eight groups of female and 8 groups of male Wistar rats were included. For each sex, 1 group of gonad-intact and 1 group of gonadectomized rats were employed as controls (placebo). The other...

...Andreas Kjær; Ulrich Knigge; Flemming W. Bach; Jørgen Warberg Stress stimulates secretion of the pro-opiomelanocortin (POMC)-derived peptides adrenocorticotropic hormone (ACTH), β-endorphin (β-END) and α-melanocyte-stimulating hormone (α-MSH) from the anterior lobe (AL) and intermediate lobe (IL...

... from any ideas, methods, instructions or products referred to in the content or advertisements. Histamine Proopiomelanocortin Corticotropin β-Endorphin α-Melanocyte-stimulating hormone Pituitary, intermediate lobe Adrenal steroids Bromocriptine Proopiomelanocortin and Corticotropin...

...Cynthia L. Bethea; Andrea A. Widmann Progesterone (P) acts in the central nervous system to increase prolactin secretion in estrogen (E)-primed female monkeys. β-Endorphin (BE) and Substance P (SP) are two hypothalamic peptides which increase prolactin secretion when administered to rats...

... groups) or sham injection (control groups). After treatment, animals were tested in a transparent open field for either 30 or 60 min and thereafter sacrificed by decapitation. Plasma was collected for adrenocorticotropic hormone (ACTH), corticosterone, β-endorphin (β-EP) and interleukin-6 (IL-6...

... throughout the guinea pig estrous cycle. However, neither prolactin secretion nor its regulation by steroid hormones has been characterized, perhaps due to the lack of a specific radioimmunoassay. β-Endorphin (BE), substance P (SP), and serotonin (5-HT) increase prolactin secretion in rats and monkeys...

... of male rats and hIL-1β was infused continuously at rates of 1 or 3 µg/day. Effects of hIL-1β action on plasma ACTH, β-endorphin (β-EP) and corticosterone (CORT) secretion and on anterior pituitary (AP), ACTH and β-EP content were followed. In addition, hypothalamic (HT) CRH mRNA and in AP, CRH receptor...

...James Janik; Shannon Klosterman; Rebecca Parman; Phyllis Callahan The growth hormone (GH) secretory response to β-endorphin and the involvement of opiate receptor subtypes in this response were determined in diestrous female rats. The involvement of the mu (µ), delta (δ) and/or kappa (K) site...

... hypothalamic β-endorphin (β-EP) release. In conclusion, these data show that antagonism to CRH receptors counteracts the suppressive effects of PRL upon GnRH release and that PRL is able to stimulate hypothalamic β-EP release in vitro. 13 12 1993 21 04 1994 9 4 2008 © 1994 S. Karger AG...

...Ulrich Knigge; Andreas Kjær; Henrik Jørgensen; Monique Garbarg; Christian Ross; Agnes Rouleau; Jørgen Warberg The involvement of hypothalamic histaminergic neurons in the mediation of the ACTH and β-endorphin (β-END) response to lipopolysaccharide (LPS) endotoxin was investigated in conscious male...

...Ann M. Contijoch; Sasha Malamed; Dipak K. Sarkar; Juan-Pablo Advis We studied the effect that β-endorphin (βEND) might have at the median eminence (ME) on luteinizing hormone (LH)-releasing hormone (LHRH) during the ovulatory cycle of domestic hens. Thus, we assessed (a) the immunocytochemical...

...Andreas Kjær; Ulrich Knigge; Hans Vilhardt; Flemming W. Bach; Jørgen Warberg Arginine-vasopressin (AVP) seems to be involved in the histamine (HA)- and stress-induced release of ACTH and β-endorphin (β-END). We studied the effect of selective AVP V 1 - or V 2 -receptor blockade on the ACTH and β...

... or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements. β-Endorphin Median eminence Luteinizing hormone-releasing hormone Immunocytochemistry Release Original Paper Neuroendocrinology I993;57:l 182-1195 Charles D. Conover Rodrigo O...

...) and β-endorphin (β-END). The AVP component of the regulatory mechanism can be specifically studied in Brattleboro rats which lack AVP. These animals may therefore serve as a useful biological model for investigating the importance of AVP in the ACTH and β-END response to HA and stress...

..., we assessed: (1) serum LH and ME in vivo release of LHRH, β-endorphin (β-END) and neuropeptide Y (NPY); β-END and NPY are two putative neuronal inputs to LHRH neuronal terminals at the ME, reported to be involved in the control of both reproduction and feed intake; (2) the effect that exogenous...

...(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements. Acute stress Chronic stress Swimming stress Ether stress Acetyl-/-carnitine β-Endorphin GnRH Testosterone...

... intraperitoneally (ip) at –180 and –60 min) inhibited by 30–80% the responses of prolactin (PRL), corticotropin (ACTH) and β-endorphin (β-END) immunoreactivity to 1, 2.5 or 5 min of restraint stress (p < 0.05–0.01), but had no effect on basal secretion of the hormones. The inhibitory effect of the H 3 receptor...

...Elizabeth A. Young; David Bronstein; Huda Akil Previous studies have indicated that 30 min of swimming in room temperature water is a potent stimulus for the secretion of β-endorphin (βE) from the intermediate lobe (IL) of the pituitary in rodents. Repeated daily challenge with this paradigm over...

...Jean-Pascal de Waele; Christina Gianoulakis Ethanol has been shown to enhance the in vitro release of hypothalamic β-endorphin (β-EP). In the present study, the pattern of β-EP release by the hypothalamus of two strains of mice, bred selectively for their preference (C57BL/ 6) or aversion (DBA/2...