Abstract:
:Electrical stimulation in the subfornical organ (SFO) alters the excitability of antidromically identified paraventricular nucleus neurons. Extracellular recordings demonstrate that the dominant effect of single stimuli delivered to the SFO on neurohypophyseal oxytocin and vasopressin containing neurons is an increase in excitability. In 35% of cells tested, this excitation showed a long latency (44.3 +/- 3.4 ms) prolonged duration (208.7 +/- 23.5 ms), while in 16% of the neurons the excitation observed may be described as short latency (24.7 +/- 1.8 ms) short duration (11.6 +/- 1.4 ms). Of the remaining cells antidromically identified as projecting to the posterior pituitary, 12% showed initial decreases in excitability following SFO stimulation while the remaining 37% were unaffected. Evidence is presented demonstrating that stimulation in the region of the SFO results in short latency (27.9 +/- 2.4 ms) short duration (7.8 +/- 0.7 ms) increases in excitability in 22% of antidromically identified PVN tuberoinfundibular neurons tested. These data provide electrophysiological evidence in support of the proposed role of the subfornical organ in the control of posterior and anterior pituitary function.
journal_name
Neuroendocrinologyjournal_title
Neuroendocrinologyauthors
Ferguson AV,Day TA,Renaud LPdoi
10.1159/000124015subject
Has Abstractpub_date
1984-11-01 00:00:00pages
423-8issue
5eissn
0028-3835issn
1423-0194journal_volume
39pub_type
杂志文章abstract::The effects of adrenalectomy (ADX) and dexamethasone (DEX) treatment on brain dopamine (DA) receptors of ovariectomized (OVX) rats were investigated by autoradiography using binding of the D1 and D2 antagonists ligands [3H]SCH 23390 and [3H]spiperone, respectively. Fourteen days after ADX, D1 receptors decreased in th...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000126158
更新日期:1992-04-01 00:00:00
abstract::Phase relation between plasma corticosterone and locomotor activity rhythms was analyzed in individual rats with selective lesions of suprachiasmatic nuclei (SCN). SCN in Wistar male rats were selectively coagulated electrically and the extent of SCN destruction was examined histologically. Spontaneous locomotor activ...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000123200
更新日期:1981-07-01 00:00:00
abstract::Previous studies have shown that prepubertal olfactory bulbectomy will prevent the testicular regression associated with short photoperiod in golden hamsters. The gonadal regression which normally occurs in hamsters on short photoperiod is known to be due in part to an increased responsiveness of the reproductive neur...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000124839
更新日期:1987-10-01 00:00:00
abstract::Progesterone is readily reduced in humans to its A-ring metabolites, allopregnanolone (3 alpha-hydroxy-5 alpha-pregnan-20-one) and pregnanolone (3 alpha-hydroxy-5 beta-pregnan-20-one). The latter have been reported to have anxiolytic, hypnotic and anesthetic actions when administered to laboratory animals and (or) hum...
journal_title:Neuroendocrinology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1159/000126579
更新日期:1993-10-01 00:00:00
abstract::The A1 and A2 brainstem noradrenergic cell groups project to the hypothalamic paraventricular nucleus (PVN), which is involved in integrating the stress response. Bi-directional communication between the brain and immune system is well established, with both neuroendocrine and immune responses being activated by lipop...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000054474
更新日期:1999-09-01 00:00:00
abstract::In the course of the search for the prolactin-releasing factor (PRF), we noticed that the posterior pituitary contained strong PRF activity and subsequently traced this activity to that of bovine neurophysin-II (NP-II). NP-II prepared in our lab was judged to be a homogeneous preparation according to Sephadex G-75 gel...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000124190
更新日期:1985-10-01 00:00:00
abstract::We have suggested that gamma-aminobutyric acid (GABA) in the hypothalamus plays a tonic inhibitory role in the control of the luteinizing hormone (LH) release in intact male rats. To assess whether feedback from the testis alters the inhibitory GABAergic tone in the medial preoptic area (MPO) of male rats, an in vivo ...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000066625
更新日期:2002-11-01 00:00:00
abstract::The mu-opioid receptor (OR) is involved in several aspects of female reproductive neuroendocrinology, such as the control of gonadotropin release and the display of lordosis behavior. Even though the neuroendocrine events modulated by mu-ORs are steroid hormone-dependent, few studies have shown how steroid hormones su...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000065953
更新日期:2002-10-01 00:00:00
abstract::In all vertebrates, the regulations of growth and energy balance are complex phenomena which involve elaborate interactions between the brain and peripheral signals. Most vertebrates adopt and maintain a life style after birth, but lower vertebrates may have complex life histories involving metamorphoses, migrations a...
journal_title:Neuroendocrinology
pub_type: 杂志文章,评审
doi:10.1159/000101029
更新日期:2007-01-01 00:00:00
abstract::The effect of altering gamma-aminobutyric acid (GABA) activity on growth hormone (GH) secretion of freely moving chronically cannulated male rats was studied. Systemic injection of the GABA agonist muscimol (2 mg/kg i.v.) inhibited the anticipated secretory episode. Increasing brain GABA levels by gamma-acetylenic-GAB...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000124031
更新日期:1984-12-01 00:00:00
abstract::The involvement of histaminergic transmission in the rapid and sustained plasma ACTH and corticosterone (CORT) responses induced in conscious rats by intra-arterial infusions of 25 micrograms.kg-1 Escherichia coli lipopolysaccharide (LPS) was investigated. LPS challenge produced a rapid and transient increase (+ 62%) ...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000126961
更新日期:1996-03-01 00:00:00
abstract::The expression of the mouse metallothionein-I (mMT) promoter/human growth hormone (hGH) fusion gene in transgenic mice leads to female sterility and major alterations in the function of the hypothalamic-adenohypophyseal system. These alterations include increases in median-eminence norepinephrine turnover and plasma L...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000125743
更新日期:1991-04-01 00:00:00
abstract::In previous studies we demonstrated that insulin-like growth factor I (IGF-I) induces pituitary vasoactive intestinal peptide (VIP) gene expression and secretion, and that IGF-I-induced prolactin (PRL) release is mediated by VIP. In this study, we investigate the mitotropic action of IGF-I and VIP on pituitary lactotr...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000070900
更新日期:2003-05-01 00:00:00
abstract::Following the procedure of Jeffcoate et al. [1974] we have successfully obtained a specific antiserum to LH-RH in rabbits, and are utilizing our antibody to study the synthesis of LH-RH by rat hypothalamic tissues in vitro. Our antibody, used at a dilution of 1:20,000, binds 37% of added 125I-labelled LH-RH, and cross...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000122517
更新日期:1976-01-01 00:00:00
abstract:BACKGROUND/AIM:The mode of action of the somatostatin analog octreotide on neuro-endocrine tumour proliferation is largely unknown. Overexpression of the proto-oncogene Akt/PKB (protein kinase B) has been demonstrated in certain neuro-endocrine tumours: Akt activates downstream proteins including mTOR and p70S6K, which...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000111501
更新日期:2008-01-01 00:00:00
abstract::Previous studies have shown that the hypothalamic concentration of pro-opiomelanocortin (POMC) mRNA and several POMC-derived peptides increases in the rat 4 weeks after orchiectomy and that this increase can be prevented by testosterone replacement. In this study, we have examined the short-term effects of orchiectomy...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000125638
更新日期:1990-11-01 00:00:00
abstract::In order to search for candidate genes related to pituitary adenoma aggressiveness, the present investigation was intended to compare the mRNA expression profile from a pool of four nonfunctional pituitary adenomas (NFPA) with a spinal cord metastasis of a nonfunctional pituitary carcinoma (MNFPC). The metallothionein...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000092521
更新日期:2005-01-01 00:00:00
abstract::The postnatal development of the luteinizing hormone-releasing hormone (LHRH) system in male and female rats was investigated using light microscopic immunocytochemistry. An identical number of immunoreactive LHRH cells (about 1,300) was observed for males and females throughout development. Two LHRH cell types, based...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000124516
更新日期:1986-01-01 00:00:00
abstract::The obese gene (OB) product, leptin, has been shown to exert control on metabolic processes such as food intake and body weight homeostasis, possibly through a neuropeptide Y (NPY) neurotransmission. More recently, leptin has been shown to control several neuroendocrine axes, modulating pituitary hormone secretions in...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000054326
更新日期:1998-05-01 00:00:00
abstract::Specific lesions of different brain structures known to contain or to be coursed by LHRH neurons have been carried out in intact cycling female rats in order to investigate the role played by central LHRH and neuronal systems in the regulation of ovarian and hypophyseal LHRH receptor (LHRH-R) levels, using the stable ...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000124196
更新日期:1985-10-01 00:00:00
abstract::The diuretic action of two new narcotic antagonists, oxilorphan and butorphanol, was studied in rats heterozygous for hereditary hypothalmic diabetes insipidus. Both drugs caused a prompt increase in urine volume and a decrease in urine osmolality with an associated decrease in urinary ADH excretion. The effects appea...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000122444
更新日期:1975-01-01 00:00:00
abstract::The mechanisms by which leptin influences energy homeostasis are not entirely understood. Several observations indicate that proopiomelanocortin (POMC) is involved in the regulation of food intake and may be a mediator of leptin action. To further study this interaction, a sensitive solution hybridization assay was us...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000054499
更新日期:1999-12-01 00:00:00
abstract::Brain corticosteroid receptors, the type 1 mineralocorticoid receptor (MR) and the type 2 glucocorticoid receptor (GR), are involved in the regulation of neuroendocrine and behavioral responses during ongoing and stressful conditions. To further investigate the role of MR in these responses, we treated male Wistar rat...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000127272
更新日期:1997-03-01 00:00:00
abstract:BACKGROUND:Little information is available concerning prognostic factors for bronchopulmonary large cell neuroendocrine carcinomas (BP-LCNECs) and even less is known about combined LCNECs (Co-LCNECs). We investigated whether an integrated morphological, immunohistochemical, and molecular approach could be used for thei...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000508376
更新日期:2020-05-04 00:00:00
abstract::The following fragments of LHRH were administered intraventricularly and tested for their ability to enhance sexual receptivity in ovariectomized, estrogen-primed female rats: LHRH1-6 NH2, Ac-LHRH5-10, des-Tyr5-LHRH and des-Gly10-LHRH. LHRH1-6 NH2 had no effect on sexual behavior compared to saline-infused controls. A...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000123503
更新日期:1983-06-01 00:00:00
abstract::Neuropeptide W (NPW) is a ligand of the recently deorphaned receptor GPR7. Intracerebroventricular injection of this peptide results in reduced serum growth hormone concentration. Using whole-cell patch clamp recordings from somatostatin (SS) neurons in the hypothalamic arcuate nucleus, identified post-hoc using singl...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000117577
更新日期:2008-01-01 00:00:00
abstract::In the present article we report that in vivo LHRH output as measured at the anterior pituitary following castration significantly increased, due to larger and more frequent LHRH signals arriving to this gland. This contrasts with the decreased amplitude and overall mean LHRH release of castrate males bearing a push-p...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000124748
更新日期:1987-04-01 00:00:00
abstract::The reuptake of dopamine into nerve terminals is the primary mechanism of inactivation of this neurotransmitter in the synaptic cleft. We report sex differences and estrous cycle variations of rat striatal dopamine uptake sites. During the estrous cycle, peak density of striatal dopamine uptake sites labelled with [3H...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000126507
更新日期:1993-07-01 00:00:00
abstract::The incidence of obesity is rapidly escalating and has reached epidemic proportions. In all species, including rodents, humans, and sheep, there is large variation in the degree of weight gain across individuals in response to an obesogenic environment. This individual variation is, at least in part, determined by inn...
journal_title:Neuroendocrinology
pub_type: 杂志文章,评审
doi:10.1159/000455232
更新日期:2017-01-01 00:00:00
abstract::The effects of acute and chronic administration of a combination of lynestrenol-mestrenol, a widely employed contraceptive medication, on the dopaminergic system of the rat forebrain and striatum were investigated to better understand the biochemical basis of the neurological side-effects of steroid contraceptive drug...
journal_title:Neuroendocrinology
pub_type: 杂志文章
doi:10.1159/000122643
更新日期:1976-01-01 00:00:00