Neurosecretory activity within suprachiasmatic neurons of the female rabbit following castration.

Abstract:

:The effects of ovariectomy on the ultrastructure of neurons within the SCH nuclei of the rabbit were investigated. All SCH neurons of the intact controls were similar in that they showed no morphological evidence of enhanced neurosecretory activity. In contrast, two distinct types of neurons were present within the SCH nuclei of the ovariectomized animals. The small, Type I neurons were ultrastructurally identical to the SCH neurons of the intact controls. The larger, Type II neurons, on the other hand, clearly presented structural evidence for elevated intraneuronal synthesis. To ensure that the changes which characterized the Type II neurons were due, at least in part, to the removal of ovarian steroids following ovariectomy and not to surgical stress alone, the SCH nuclei of laparotomized rabbits were also studied. Although the same two neuron types were observed, the number of Type II neurons in the laparotomized controls was significantly smaller (p smaller than 0.001) than the number in the ovariectomized group. These findings suggest that Type II neurons probably represent a functional state of the smaller, non-active neurons of the intact controls. In addition, the ultrastructural features that distinguish type II neurons are positively related to the endocrine state of the rabbit and, therefore, may represent the hypothalamic synthesis of the releasing hormones that control is gonadotropic activity.

journal_name

Neuroendocrinology

journal_title

Neuroendocrinology

authors

Clattenburg RE,Montemurro DG,Bruni JE

doi

10.1159/000122357

subject

Has Abstract

pub_date

1975-01-01 00:00:00

pages

211-24

issue

3

eissn

0028-3835

issn

1423-0194

journal_volume

17

pub_type

杂志文章
  • Uptake, content, regulation of plasma concentrations, and binding of Tyr-MIF-1 by the adrenals.

    abstract::The known occurrence of opiates in the adrenals stimulated us to determine whether Tyr-MIF-1 (Tyr-Pro-Leu-Gly-NH2), an endogenous peptide that can act as an antiopiate, is present in these glands and whether adrenalectomy affects its concentrations in plasma. The presence of Tyr-MIF-1 in the adrenals of the rat was sh...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章

    doi:10.1159/000126403

    authors: Kastin AJ,Fabre L,Banks WA,Zadina JE

    更新日期:1993-03-01 00:00:00

  • Effects of stimulation of the preoptic area on hypothalamic paraventricular nucleus unit activity and corticosterone secretion in freely moving rats.

    abstract::Recordings were made of single unit activity through chronically implanted electrodes within the hypothalamic paraventricular nucleus of freely moving male rats also bearing chronically implanted stimulating electrodes in the preoptic area (POA) and indwelling jugular cannulae. High frequency electrical stimulation of...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章

    doi:10.1159/000124269

    authors: Saphier D,Feldman S

    更新日期:1986-01-01 00:00:00

  • Potential Clinical Use of Kisspeptin.

    abstract::Over the last 10 years, kisspeptins--peptide products of varying lengths encoded by the KISS1 gene--have been found to be key regulators of normal reproductive function throughout life in animals and humans. By activating the kisspeptin receptor [previously known as orphan G protein-coupled receptor 54 (GPR54)], they ...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章,评审

    doi:10.1159/000439133

    authors: Prague JK,Dhillo WS

    更新日期:2015-01-01 00:00:00

  • Cerebrospinal fluid levels of acetylcholinesterase, monoamines and oxytocin during labour, parturition, vaginocervical stimulation, lamb separation and suckling in sheep.

    abstract::Acetylcholinesterase (AChE) activity, and concentrations of monoamines, monoamine metabolites and oxytocin (OT) were measured in the cerebrospinal fluid (CSF) of sheep during late pregnancy, labour, parturition, vaginocervical stimulation, lamb separation and suckling. Concentrations of AChE, 4-hydroxy-3 methoxyphenyl...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章

    doi:10.1159/000124638

    authors: Kendrick KM,Keverne EB,Baldwin BA,Sharman DF

    更新日期:1986-01-01 00:00:00

  • Involvement of central histamine in the early phase of ACTH and corticosterone responses to endotoxin in rats.

    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

    authors: Givalois L,Siaud P,Mekaouche M,Ixart G,Malaval F,Assenmacher I,Barbanel G

    更新日期:1996-03-01 00:00:00

  • Reevaluation of the effects of castration on naloxone-sensitive opiate receptors in the male rat brain.

    abstract::There is a great deal of conflicting data regarding the issue of whether androgens influence opiate receptors in the whole male rat brain. Although Hahn and Fishman initially reported that long-term castration produced a large increase in the density of opiate-binding sites, relative to controls, no other independent ...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章

    doi:10.1159/000124816

    authors: Cicero TJ,O'Connor LH,Bell RD

    更新日期:1987-08-01 00:00:00

  • The ontogeny of pit-1 expression in the human fetal pituitary gland.

    abstract::Pit-1 expression has been reported to be cell-type-specific in the adult human pituitary and in human pituitary adenomas. In contrast, studies of rodent fetal adenohypophysial development as well as mature rodent glands have indicated that the pit-1 mRNA is ubiquitously expressed and the protein is under translational...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章

    doi:10.1159/000126975

    authors: Puy LA,Asa SL

    更新日期:1996-04-01 00:00:00

  • Increased response of plasma allopregnanolone to corticotropin-releasing hormone in obese patients.

    abstract::Allopregnanolone is a neuroactive steroid present in the brain, but also measurable in systemic circulation. It exhibits anxiolytic and anticonvulsant effects and is able to produce hyperphagia. Since eating behavior disturbances and increased peripheral basal sympathetic activity have been reported in obese subjects,...

    journal_title:Neuroendocrinology

    pub_type: 临床试验,杂志文章,随机对照试验

    doi:10.1159/000048228

    authors: Menozzi R,Florio P,Bondi M,Luisi S,Cobellis L,Genazzani AR,Del Rio G,Petraglia F

    更新日期:2002-02-01 00:00:00

  • CRANIOPHARYNGIOMA IN THE ELDERLY: A MULTICENTER AND NATION-WIDE STUDY IN SPAIN.

    abstract:BACKGROUND:Craniopharyngioma (CP) is a rare tumor in the elderly whose clinical features and prognosis are not well known in this population. AIM:To evaluate the clinicopathological features and therapeutic outcomes of CP diagnosed in the elderly. PATIENTS AND METHODS:A retrospective, multicenter, national study of C...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章

    doi:10.1159/000512161

    authors: Iglesias P,Nocete I,Moure Rodríguez MD,Venegas-Moreno E,Ares J,Biagetti B,Rodríguez Berrocal V,Guerrero-Pérez F,Vicente A,Villar-Taibo R,Cordido F,Paja M,Glerean M,González Rivera N,Dios Fuentes E,Blanco C,Alvaréz-Escolá

    更新日期:2020-10-09 00:00:00

  • Characterization of the effect of Mycoplasma fermentans on the hypothalamo-pituitary-adrenal axis.

    abstract::The mechanisms involved in the activation of the hypothalamus-pituitary-adrenal axis after administration of Mycoplasma fermentans were examined. Male rats were injected intracerebroventricularly (i.c.v.) with heat-inactivated M. fermentas (6 micrograms protein/10 microliters/rat) or vehicle and were killed 2 h later....

    journal_title:Neuroendocrinology

    pub_type: 杂志文章

    doi:10.1159/000127241

    authors: Wohlman A,Gallily R,Yirmiya R,Weidenfeld J

    更新日期:1997-09-01 00:00:00

  • Ontogeny of immunoreactive prostaglandin endoperoxide synthase isoforms in ovine fetal pituitary, hypothalamus and brainstem.

    abstract::Parturition is initiated in sheep by an increase in the activity of the fetal hypothalamus-pituitary-adrenal (HPA) axis. Prostaglandins, known to augment the activity of this endocrine axis, have long been proposed as involved in the initiation of paturition. We have previously demonstrated that endogenously produced ...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章

    doi:10.1159/000054548

    authors: Deauseault D,Giroux D,Wood CE

    更新日期:2000-05-01 00:00:00

  • Fetal development of delta-sleep-inducing-peptide-like immunoreactivity in hypothalamus of guinea pig with special regard to the prenatal colocalization with gonadotropin-releasing-hormone-like immunoreactivity.

    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

    pub_type: 杂志文章

    doi:10.1159/000126098

    authors: Pu LP,Dubois PM

    更新日期:1992-01-01 00:00:00

  • Progesterone induces dephosphorylation and inactivation of tyrosine hydroxylase in rat hypothalamic dopaminergic neurons.

    abstract::After in vivo treatment, progesterone initially decreases tyrosine hydroxylase (TH) activity in the TIDA neurons, but subsequently increases TH activity with prolonged treatment. In order to explore the cellular mechanism for progesterone's effect, this study examined the acute inhibitory action of progesterone on TH ...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章

    doi:10.1159/000057336

    authors: Arbogast LA,Voogt JL

    更新日期:2002-05-01 00:00:00

  • Surgical treatment of endocrine pancreatic tumours.

    abstract::Endocrine pancreatic tumours (EPTs) are uncommon, with a major challenge to alert physicians to their recognition and requirements of treatment. Functioning EPTs cause well-known clinical syndromes of hormone excess. Insulinomas, gastrinomas and glucagonomas are most common; vipomas and somatostatinomas are rare. EPTs...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章,评审

    doi:10.1159/000080744

    authors: Akerström G,Hellman P,Hessman O,Osmak L

    更新日期:2004-01-01 00:00:00

  • Effects of pinealectomy, anosmia and blinding on serum and pituitary prolactin in intact and castrated male rats.

    abstract::Serum prolactin was measured in lightly etherized rats between 4 and 5 a.m. and between 11 a.m. and 12 noon at various times after operation in intact rats and rats that had been operated on. Serum prolactin was elevated in the late nocturnal samples from intact rats and this elevation was prevented by pinealectomy. W...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章

    doi:10.1159/000122372

    authors: Ronnekleiv OK,McCann SM

    更新日期:1975-01-01 00:00:00

  • In vivo and in vitro studies on the opioidergic control of the secretion of gonadotrophin-releasing hormone and luteinizing hormone in sexually immature and adult male rats.

    abstract::In vivo and in vitro methods have been used to compare the effects of opioid receptor blockade on the functional activity of the hypothalamo-pituitary-gonadal axis in adult (200 g) and sexually immature (50 g) male rats. In the adult, a single injection of the mu-receptor antagonist, naloxone (500 micrograms/100 g bod...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章

    doi:10.1159/000125777

    authors: Leposavic G,Cover PO,Buckingham JC

    更新日期:1991-06-01 00:00:00

  • Testosterone modulates oxytocin binding in the hypothalamus of castrated male rats.

    abstract::Oxytocin (OT) binding sites are modulated by estrogens in several brain regions including the ventromedial hypothalamic nucleus (VMN) in both male and female rats. To further study steroid regulation of OT receptor binding, we examined the effect of androgen replacement in castrated male rats on OT binding with quanti...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章

    doi:10.1159/000125222

    authors: Johnson AE,Coirini H,McEwen BS,Insel TR

    更新日期:1989-08-01 00:00:00

  • Everolimus in Combination with Octreotide Long-Acting Repeatable in a First-Line Setting for Patients with Neuroendocrine Tumors: A 5-Year Update.

    abstract:BACKGROUND:We previously presented data of this multicentric, phase II study showing that everolimus plus octreotide long-acting repeatable (LAR) for advanced neuroendocrine neoplasms (NENs), in the first line setting, is an active and safe treatment. We now present updated data at 5 years. METHODS:Patients with advan...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章,多中心研究

    doi:10.1159/000479587

    authors: Bajetta E,Catena L,Pusceddu S,Spada F,Iannacone C,Sarno I,Di Menna G,Dottorini L,Marte AM

    更新日期:2018-01-01 00:00:00

  • 68Gallium DOTANOC-PET Imaging in Lung Carcinoids: Impact on Patients' Management.

    abstract:BACKGROUND:68Gallium DOTA-PET imaging is preferable to standard somatostatin receptor scintigraphy where available; however, its role in the management of lung carcinoid tumours (LC) remains unclear. METHODS:All consecutive patients with histologically confirmed LC from two ENETS Centres of Excellence were identified ...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章,多中心研究

    doi:10.1159/000472717

    authors: Lamarca A,Pritchard DM,Westwood T,Papaxoinis G,Nonaka D,Vinjamuri S,Valle JW,Manoharan P,Mansoor W

    更新日期:2018-01-01 00:00:00

  • Beta-endorphin regulation of LHRH release at the median eminence level: immunocytochemical and physiological evidence in hens.

    abstract::We studied the effect that beta-endorphin (beta END) 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 distribution of beta END and LHRH in the hen ME, (b) the temporal changes in ME and ...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章

    doi:10.1159/000126381

    authors: Contijoch AM,Malamed S,Sarkar DK,Advis JP

    更新日期:1993-01-01 00:00:00

  • Modulation of lordosis behavior of female rats by naloxone, beta-endorphin and its antiserum in the mesencephalic central gray: possible mediation via GnRH.

    abstract::The role of endogenous opiate peptides in the mesencephalic central gray (MCG) and their possible interactions with gonadotropin-releasing hormone (GnRH) in the regulation of lordosis behavior was assessed in ovariectomized, estrogen-treated and estrogen-progesterone-treated female rats. Lordosis behavior triggered by...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章

    doi:10.1159/000123983

    authors: Sirinathsinghji DJ

    更新日期:1984-09-01 00:00:00

  • Thyroid hormone level positively regulates NOS and cGMP in the developing rat cerebellum.

    abstract::Thyroid hormones and nitric oxide/cyclic guanosine monophosphate (NO/cGMP) signaling play a significant role in the structural development of the cerebellum, respectively. In the present study, the possible contribution of neuronal NO synthase (NOS) and cGMP in the thyroid hormone-induced structural changes was invest...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章

    doi:10.1159/000203644

    authors: Serfozo Z,de Vente J,Elekes K

    更新日期:2009-01-01 00:00:00

  • Serotonin and dopamine independently regulate pituitary beta-endorphin release in vivo.

    abstract::Serotonin and dopamine neurons have been shown to exert a stimulatory and inhibitory control, respectively, over pituitary release of beta-endorphin-like immunoreactivity (beta-END-LI). In the present study we sought to determine whether an interaction exists between these two reciprocal mechanisms regulating beta-END...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章

    doi:10.1159/000124439

    authors: Sapun-Malcolm D,Farah JM Jr,Mueller GP

    更新日期:1986-01-01 00:00:00

  • Androgen regulation of immunological and biological activities of pituitary follicle-stimulating hormone isoforms in male rats.

    abstract::Follicle-stimulating hormone (FSH) is involved in the regulation and maintenance of gametogenesis. It exists in multiple molecular forms with different oligosaccharide structures which in turn are influenced by the hormonal milieu. Previous studies from our laboratory demonstrated that antiandrogen administration to i...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章

    doi:10.1159/000054484

    authors: Rulli SB,Creus S,Pellizzari E,Cigorraga SB,Calandra RS,Campo S

    更新日期:1999-10-01 00:00:00

  • Kisspeptin and Gonadotropin-Releasing Hormone Neuronal Excitability: Molecular Mechanisms Driven by 17β-Estradiol.

    abstract::Kisspeptin is a neuropeptide that signals via a Gαq-coupled receptor, GPR54, in gonadotropin-releasing hormone (GnRH) neurons and is essential for pubertal maturation and fertility. Kisspeptin depolarizes and excites GnRH neurons primarily through the activation of canonical transient receptor potential (TRPC) channel...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章,评审

    doi:10.1159/000370311

    authors: Rønnekleiv OK,Zhang C,Bosch MA,Kelly MJ

    更新日期:2015-01-01 00:00:00

  • Central clock regulates the cervically stimulated prolactin surges by modulation of dopamine and vasoactive intestinal polypeptide release in ovariectomized rats.

    abstract:BACKGROUND/AIMS:Cervical stimulation induces a circadian rhythm of prolactin secretion and antiphase dopamine release. The suprachiasmatic nucleus (SCN) controls this rhythm, and we propose that it does so through clock gene expression within the SCN. METHODS:To test this hypothesis, serial blood samples were taken fr...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章

    doi:10.1159/000254379

    authors: Poletini MO,Kennett JE,McKee DT,Freeman ME

    更新日期:2010-01-01 00:00:00

  • Galanin-like peptide mRNA alterations in arcuate nucleus and neural lobe of streptozotocin-diabetic and obese zucker rats. Further evidence for leptin-dependent and independent regulation.

    abstract::Galanin-like peptide (GALP) is a 60-amino-acid peptide with structural similarities to galanin and a high affinity for galanin receptors. GALP is expressed by a discrete population of neurons in the arcuate nucleus (ARC) and median eminence of the hypothalamus of several species, including the rat. GALP neurons expres...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章

    doi:10.1159/000079752

    authors: Shen J,Gundlach AL

    更新日期:2004-01-01 00:00:00

  • Corticotrophin-releasing factor and arginine vasopressin fibre projections to the median eminence of fetal sheep.

    abstract::Using specific antibodies to corticotrophin-releasing factor (CRF) and arginine vasopressin (AVP) we have immunocytochemically located cells and fibres containing these peptides in sheep fetuses. CRF neurones were first detected, in low frequency, in the paraventricular nuclei of fetuses of 90 days of gestation (term ...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章

    doi:10.1159/000124860

    authors: Levidiotis M,Oldfield B,Wintour EM

    更新日期:1987-11-01 00:00:00

  • Glutamate receptor agonists modulate [Ca2+]i in isolated rat melanotropes.

    abstract::Although glutamate is the predominant excitatory amino acid in the vertebrate central nervous system (CNS) where it affects a variety of physiological processes and pathophysiological states, the role that glutamate receptors may play outside the CNS has not been clearly established. In the present study, the effects ...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章

    doi:10.1159/000126995

    authors: Giovannucci DR,Stuenkel EL

    更新日期:1995-08-01 00:00:00

  • Inhibition of cell nuclear androgen receptor binding and copulation in male rats by an antiandrogen, Sch 16423.

    abstract::The ability of the flutamide metabolite Sch 16423 to block androgen receptor binding and inhibit masculine copulatory behavior in male rats was examined. Restoration of copulatory behavior was prevented in Sch 16423-treated rats given two 10-mm testosterone (T)-filled Silastic capsules plus 15 mg Sch 16423 daily for 1...

    journal_title:Neuroendocrinology

    pub_type: 杂志文章

    doi:10.1159/000124510

    authors: McGinnis MY,Mirth MC

    更新日期:1986-01-01 00:00:00