Profiles of in vivo gamma-aminobutyric acid release in the medial preoptic area of intact and castrated male rats.

abstract：:The purpose of the present study was to examine whether repetitive intravenous injections of L-glutamic acid (Glu), like those of N-methyl-D,L-aspartic acid (NMA), are able to elicit a sustained train of gonadotropin releasing hormone (GnRH) discharges from the hypothalamus of the prepubertal male monkey. In order to ...

journal_title：Neuroendocrinology

authors： Medhamurthy R,Gay VL,Plant TM

更新日期：1992-06-01 00:00:00

abstract：:Prolactin (PRL) secretion in the female rat is regulated by an endogenous stimulatory rhythm (ESR), which is normally under the tonic inhibition of dopamine (DA). The ESR consists of a nocturnal (N) component which peaks at approximately 03.00 h, and a diurnal (D) component which peaks at approximately 17.00 h. This E...

journal_title：Neuroendocrinology

authors： Arey BJ,Kanyicska B,Freeman ME

更新日期：1991-01-01 00:00:00

abstract：:Vasopressin and oxytocin modulate memory processes which effects are dissociated from the typical peripheral endocrine effects of these neuropeptides. Recently, vasopressin has been implicated in the regulation of body temperature. In view of this, experiments were designed to determine whether the antipyretic effect ...

journal_title：Neuroendocrinology

authors： Kovács GL,De Wied D

更新日期：1983-10-01 00:00:00

abstract：:Several molecular forms related to the decapeptide LHRH were characterized and quantified in various brain structures of intact and castrated male and female rats. Distinct moieties were separated by high performance liquid chromatography (HPLC) and radioimmunoassayed against anti-LHRH antibodies of different specific...

journal_title：Neuroendocrinology

authors： Gautron JP,Pattou E,Leblanc P,L'Héritier A,Kordon C

更新日期：1993-08-01 00:00:00

abstract：:The level of thyroid hormone in blood has been acutely decreased by about 20--30% within 20 min with the aid of isovolemic exchange transfusion (IET) of thyroid hormone free blood cell suspension (THFBCS) in three groups of rats: (1) intact control (C); (2) median eminence (ME)-lesioned; (3) thalamus (TH)-lesioned. Th...

journal_title：Neuroendocrinology

authors： Langer P,Földes O,Mess B,Kokesová H,Gschwendtová K

更新日期：1977-01-01 00:00:00

abstract：:It is not known where melatonin acts to influence the neuroendocrine axis of seasonally breeding mammals. However, since the pars tuberalis (PT) contains the highest density of melatonin receptors, this adenohypophyseal subdivision is a potential target. Gonadotropes are the only immunocytochemically detectable adenoh...

journal_title：Neuroendocrinology

authors： Skinner DC,Robinson JE

更新日期：1997-10-01 00:00:00

abstract：:Relief of symptoms can be achieved following surgery for growth hormone (GH)-secreting adenomas, as well as after pharmacological therapy with somatostatin analogs. Recently, long-acting somatostatin analog depot formulations, octreotide LAR and lanreotide SR have become available. Somatostatin analogs control GH/insu...

journal_title：Neuroendocrinology

authors： Tolis G,Angelopoulos NG,Katounda E,Rombopoulos G,Kaltzidou V,Kaltsas D,Protonotariou A,Lytras A

更新日期：2006-01-01 00:00:00

abstract：:Circadian rhythm of blood corticosterone in adrenalectomized rats with (AT rat) or without adrenal autotransplants was investigated. Blood samples were obtained individually at 4-hour intervals for a 24-hour period per week for 5-7 consecutive weeks by the tail tip incision method. Corticosterone responses of the auto...

journal_title：Neuroendocrinology

authors： Murakami N,Takahashi K

更新日期：1982-03-01 00:00:00

abstract：:The electrical properties of GH3 cells, a transformed line from the rat pituitary, were studied with a current-clamp technique in the presence of triiodothyronine (T3) and reverse triiodothyronine (rT3) and compared with the known effects of T3. rT3 had an effect only in a concentration of 1 microM; action potentials ...

journal_title：Neuroendocrinology

authors： du Pont JS

更新日期：1991-08-01 00:00:00

abstract：:This study examines the neural lobe of the pituitary gland for the presence of receptors for pituitary adenylate cyclase-activating polypeptide (PACAP) and their possible involvement in the regulation of neurosecretion. The presence of PACAP receptors of type I was revealed in the neural lobe, as well as in anterior a...

journal_title：Neuroendocrinology

authors： Lutz-Bucher B,Monnier D,Koch B

更新日期：1996-08-01 00:00:00

abstract：:Plasma TSH responses after an i.v. injection of 100 mg of L-dopa were evaluated by radioimmunoassay in 4 normal euthyroid subjects and in 8 patients with primary hypothyroidism. In agreement with previous results, no variations to plasma TSH levels were observed in the euthyroid subjects. In contrast, in primary hypo...

journal_title：Neuroendocrinology

authors： Minozzi M,Faggiano M,Lombardi G,Carella C,Criscuolo T,Scapagnini U

更新日期：1975-01-01 00:00:00

abstract：:The frequency of pulsatile release of gonadotropin-releasing hormone (GnRH) and luteinizing hormone (LH) is high in the breeding season and low in the nonbreeding season. These alterations in the patterns of GnRH and LH release are due to an interaction of daylength and gonadal steroid negative feedback. A vast amount...

journal_title：Neuroendocrinology

authors： Dobbins A,Lubbers LS,Jackson GL,Kuehl DE,Hileman SM

更新日期：2004-02-01 00:00:00

abstract：:The timing of the episodic secretion of luteinizing hormone (LH) in ovariectomized ewes was investigated with respect to an ultradian rest-activity cycle. Individual sheep were enclosed in a chamber where their physical activity was continuously monitored, and blood samples for LH analysis were collected at 5-min inte...

journal_title：Neuroendocrinology

authors： Rasmussen DD,Malven PV

更新日期：1981-06-01 00:00:00

abstract：:An ultradian rhythm in adrenal secretion of corticosterone has been described in awake rats using intra-adrenal microdialysis. To determine the role of the autonomic innervation of the adrenal on the expression of the corticosterone rhythm, adrenal extracellular fluid was sampled by intra-adrenal microdialysis in inta...

journal_title：Neuroendocrinology

authors： Jasper MS,Engeland WC

更新日期：1994-02-01 00:00:00

abstract：:In experiment I we studied the capacity of progesterone (P) and two nonsteroidal agents that activate lordosis, but do not bind to the progestin receptor (PR), i.e. luteinizing hormone-releasing hormone (LHRH) and prostaglandin E2 (PGE2) to induce sequential inhibition (SI) in ovariectomized estradiol-primed rats. The...

journal_title：Neuroendocrinology

authors： González-Mariscal G,Melo AI,Beyer C

更新日期：1993-05-01 00:00:00

abstract：:We measured the concentration of oxytocin and vasopressin in microdissected areas of the hypothalamus and posterior pituitary in weanling and adult female rats. Oxytocin concentration was significantly less in adult rats as compared to weanling rats in the supraoptic nucleus, median eminence, and retrochiasmatic area ...

journal_title：Neuroendocrinology

authors： Jackson R,George JM

更新日期：1980-08-01 00:00:00

abstract：:Somatostatin (ST) inhibits gastrointestinal motility and exocrine and endocrine secretions. In animals, ST has been demonstrated to decrease food intake. We investigated, in a randomized double-blind investigation in 10 healthy humans, the effects of an intravenous ST infusion compared to saline on subjective hunger f...

journal_title：Neuroendocrinology

authors： Lieverse RJ,Jansen JB,Masclee AM,Lamers CB

更新日期：1995-02-01 00:00:00

abstract：:Physiological brain aging is characterized by important biochemical and structural changes and by the unbalance among the different neurotransmitters and neuromodulators. The study of the circadian organization of neuroendocrine functions may be considered a clinically reliable tool to investigate the changes of the C...

journal_title：Neuroendocrinology

authors： Ferrari E,Magri F,Dori D,Migliorati G,Nescis T,Molla G,Fioravanti M,Solerte SB

更新日期：1995-04-01 00:00:00

abstract：:Many aspects of reproductive neuroendocrine function and sexual behavior are responsive to both androgens and estrogens, suggesting that receptors for these steroid hormones may reside within single cells in brain regions that control reproductive function. We determined the distribution of estrogen receptor-containin...

journal_title：Neuroendocrinology

authors： Wood RI,Newman SW

更新日期：1995-11-01 00:00:00

abstract：:In rats anesthetized with sodium pentobarbital, adrenal venous blood samples were collected and analyzed for epinephrine and norepinephrine by the fluorometric method. Stimulation of the inferior fovea or adjacent areas resulted in a significant increase in epinephrine secretion. Stimulation of some other areas of the...

journal_title：Neuroendocrinology

authors： Matsui H

更新日期：1979-01-01 00:00:00

abstract：:Our laboratory has previously described the widespread distribution of an immunoreactive and bioactive rat growth hormone (rGH)-like protein in rat brain. It has also been demonstrated that regulation of pituitary rGH secretion is at least partly mediated by a short-loop negative feedback system. In such a system, inc...

journal_title：Neuroendocrinology

authors： Hojvat S,Emanuele NV,Kirsteins L,Lawrence AM

更新日期：1986-01-01 00:00:00

abstract：:The purpose of this study was to determine the effect of rendering newborn male Sprague-Dawley rats hypothyroid with 131I on development of the hypothalamic-pituitary axis. Hormonal responses to thyrotropin-releasing hormone (TRH), haloperidol (H), and luteinizing hormone-releasing hormone (LHRH) were determined at 9,...

journal_title：Neuroendocrinology

authors： Sowers JR,Resch G,Walker S,Sollars E

更新日期：1980-05-01 00:00:00

abstract：:In the primate, arginine vasopressin (AVP) is known to activate the hypothalamo-pituitary-adrenal axis and to inhibit LH secretion. In the present study, we investigate the role of the endogenous opioid peptides and corticotropin-releasing hormone (CRH) in these processes. Adult ovariectomized rhesus monkeys bearing a...

journal_title：Neuroendocrinology

authors： Xiao E,Xia-Zhang L,Thornell D,Shalts E,Ferin M

更新日期：1996-09-01 00:00:00

abstract：:In the Djungarian hamster, short photoperiods induce regression of testes and accessory glands. There is evidence that the length of time melatonin levels are elevated is the signal conveying the photoperiodic effects to the neuroendocrine axis. When the temporal course of decompression of the pattern of pineal melato...

journal_title：Neuroendocrinology

authors： Hoffmann K,Illnerová H

更新日期：1986-01-01 00:00:00

abstract：:Diurnal variations, ranging over a twofold difference in concentrations of dopamine, norepinephrine and epinephrine, occur in the rat posterior pituitary gland during a 24-hour period. Highest catecholamine concentrations were seen during daylight hours and low levels reached a nadir 5 h after the onset of darkness. D...

journal_title：Neuroendocrinology

authors： Barden N,Chevillard C,Saavedra JM

更新日期：1982-02-01 00:00:00

abstract：:In human African trypanosomiasis (sleeping sickness), sleep and wake episodes are sporadically distributed throughout the day and the night. Plasma melatonin, sleep-wakefulness and rectal temperature rhythms were studied in 9 Congolese patients suffering from sleeping sickness compared to 6 healthy controls submitted ...

journal_title：Neuroendocrinology

authors： Claustrat B,Buguet A,Geoffriau M,Bogui P,Mouanga G,Stanghellini A,Dumas M

更新日期：1998-07-01 00:00:00

abstract：:The aim of this study was to verify whether prolonged exposure of cultured rat anterior pituitary cells to high glucose can alter growth hormone (GH) release and responsiveness to secretagogues. Therefore, we cultured anterior pituitary cells obtained from normal male Sprague-Dawley rats in presence of normal (6 mM) o...

journal_title：Neuroendocrinology

authors： Renier G,Serri O

更新日期：1991-11-01 00:00:00

abstract：:Pregnant rats were kept on an ethanol-containing (6% w/v) liquid diet from the 13th day of gestation and serum growth hormone (GH) levels were determined in the offspring after four different experimental paradigms. In controls, administration of cyproheptadine (a serotonin-blocking agent), or insulin, or exposure to ...

journal_title：Neuroendocrinology

authors： Thadani PV

更新日期：1984-04-01 00:00:00

abstract：:The coadministration of growth hormone (GH) secretagogues can provide insight into the neuroregulation of GH secretion. The GH response to L-dopa (125, 250 and 500 mg orally for body weights less than 15 kg, between 15 and 30 kg and greater than 30 kg, respectively), arginine (Arg; 0.5 g/kg infused intravenously over ...

journal_title：Neuroendocrinology

authors： Ghigo E,Bellone J,Imperiale E,Arvat E,Mazza E,Valetto MR,Boffano GM,Cappa M,Loche S,De Sanctis C

更新日期：1990-07-01 00:00:00

abstract：:Delta-sleep-inducing peptide (DSIP) colocalizes within gonadotropin-releasing-hormone (GnRH)-containing neurons in adult hypothalamus and could play a role in the regulation of hypothalamic-pituitary axis in adults. To support the possibility that DSIP also participates in fetal neuroendocrine events and to demonstrat...

journal_title：Neuroendocrinology

authors： Pu LP,Dubois PM

更新日期：1992-01-01 00:00:00