Abstract：
:The role of gamma-aminobutyric acid (GABA) in the regulation of gonadotropin hormone-releasing hormone (GnRH) release was studied using rat hypothalamic slices in vitro. Perifusion with GABA (10(-8)-10(-4) M) caused a dose-dependent increase in GnRH release. The GABAA receptor agonist isoguvacine (10(-5) M) also stimulated GnRH release, whereas the GABAB agonist baclofen (10(-6) M) had no effect. The specific GABAA antagonist SR95103 (10(-6) M) caused a reduction of basal GnRH release and completely blocked that induced by GABA (10(-4) M). When nerve transmission was blocked with tetrodotoxin (TTX, 10(-6) M), GnRH release was slightly reduced but the stimulatory effects of both GABA and isoguvacine were abolished. The GABA-induced stimulation of GnRH release was also prevented when the hypothalamic slices were treated with a corticotropin releasing hormone (CRH) antagonist (alpha-helical CRF9-41, 10(-6) M) or the opioid antagonist naloxone (10(-6) M). Treatment with CRH (10(-8) M) resulted in a decrease in GnRH release and this effect was not reversed in the presence of GABA. Finally, GABA was found to stimulate the release of the opioid peptides beta-endorphin, dynorphin and met-enkephalin. These results lead us to conclude that GABA exerts two opposing effects upon GnRH neuronal activity: it acts in an inhibitory fashion at GnRH nerve terminals and in a stimulatory fashion at GnRH perikarya; the latter might occur through GABAergic inhibition of CRH release and, therefore, of opioid peptide release. Lastly, all the effects of GABA upon GnRH release appear to be mediated through GABAA receptors.
journal_name
Brain Res Bulljournal_title
Brain research bulletinauthors
Nikolarakis KE,Loeffler JP,Almeida OF,Herz Adoi
10.1016/0361-9230(88)90208-0subject
Has Abstractpub_date
1988-10-01 00:00:00pages
677-83issue
4eissn
0361-9230issn
1873-2747pii
0361-9230(88)90208-0journal_volume
21pub_type
杂志文章abstract：:The expression of dopamine by primary sensory neurons and their peripheral projections was studied in the chick dorsal root ganglion by means of immunocytochemical procedures. Within the sensory neurons, dopamine immunoreactivity is first expressed by 0.8% of cells at E10 and reaches a percentage of 5.6% before hatchi...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(93)90248-a
更新日期：1993-01-01 00:00:00
abstract：:Chemical studies have demonstrated that peptides such as the encephalitogenic (EAE) peptide of myelin basic protein (MBP) and luteinizing hormone-releasing hormone (LHRH) can bind serotonin (5-hydroxytryptamine, 5-HT) in vitro. The present research was undertaken to determine whether such binding interferes with 5-HT ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(90)90176-z
更新日期：1990-12-01 00:00:00
abstract：:Our previous results showed that neurochemical destruction of the amygdaloid terminal field of the mesolimbic dopaminergic system caused disturbances in body weight regulation and feeding. In the present experiments, it was studied whether 6-hydroxydopamine (6-OHDA)-induced bilateral lesions of the mesolimbic dopamine...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(91)90125-4
更新日期：1991-09-01 00:00:00
abstract：:The issue of possible neurobiological effects of the electromagnetic field (EMF) exposure is highly controversial. To determine whether electromagnetic field exposure could act as an environmental stimulus capable of producing stress responses, we employed the hippocampus, a sensitive target of electromagnetic radiati...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2012.04.002
更新日期：2012-07-01 00:00:00
abstract：:Bilateral inferior olive lesions, produced by systemic administration of the neurotoxin 3-acetylpyridine (3AP) produce a proconvulsant state specific for strychnine-induced seizures and myoclonus. We have proposed that these phenomena are mediated through increased excitation of cerebellar Purkinje cells, through acti...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(90)90118-j
更新日期：1990-10-01 00:00:00
abstract：:The availability of mutant mice that lack either MAO A or MAO B has created unique profiles in the central and peripheral availability of serotonin, norepinephrine, dopamine, and phenylethylamine. This paper summarizes some of the current known phenotypic findings in MAO A knock-out mice and contrast these with those ...
journal_title：Brain research bulletin
pub_type： 杂志文章,评审
doi：10.1016/s0361-9230(01)00613-x
更新日期：2001-11-15 00:00:00
abstract：:A current response induced by superfusing adenosine was examined in substantia gelatinosa (SG) neurons of adult rat spinal cord slices by using the whole-cell patch-clamp technique. In 78% of the neurons examined, adenosine induced an outward current at -70 mV [18.8 +/- 1.1 pA (n = 98) at 1mM] in a dose-dependent mann...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2004.05.002
更新日期：2004-07-30 00:00:00
abstract：:Fourteen patients with high- (n = 7) and low-dose (n = 7) benzodiazepine (BDZ) dependency presented predominantly with anxious and depressive neurotic symptoms which caused long-term BDZ medication. Their BDZ dependency was characterized by giving preference to the abuse of benzodiazepines with long elimination half-l...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(87)90109-2
更新日期：1987-09-01 00:00:00
abstract：:This study is a summary of investigations in the last decade with several collaborators on representatives of different vertebrate stocks. The results suggest that in the main vertebrate stocks (Agnathi, Chondrichthyes, Actinopterygii, Sarcopterygii-Amniotes), which had their parallel brain evolutions from the laminar...
journal_title：Brain research bulletin
pub_type： 杂志文章,评审
doi：10.1016/s0361-9230(01)00713-4
更新日期：2002-02-01 00:00:00
abstract：:In a search for morphofunctional relationships in the head of the caudate nucleus (CN), we recorded extracellular unit activity in intact cats and in cats that had received bilateral injections of 6-OHDA into the substantia nigra (SN) 30 days previously. Only units firing spontaneously and continuously for 2 min were ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(84)90213-2
更新日期：1984-01-01 00:00:00
abstract：:Developmental malformations of cortex have been shown to co-occur with language, learning, and other cognitive deficits in humans. Rodent models have repeatedly shown that animals with such developmental malformations have deficits related to auditory processing and learning. More specifically, freeze-lesion induced m...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2006.11.005
更新日期：2007-03-15 00:00:00
abstract：:The present study was conducted to evaluate plasma levels of monoamine neurotransmitter metabolites in spontaneous recurrences of methamphetamine psychosis (i.e., flashbacks). The subjects were 50 physically healthy females comprised of 25 who experienced flashbacks (flashbackers), 18 who did not experienced methamphe...
journal_title：Brain research bulletin
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1016/s0361-9230(96)00340-1
更新日期：1997-01-01 00:00:00
abstract：:Rats self-administered cocaine or received saline during 3 daily 5 h sessions and were euthanized 1 h after the final session. Quantitative in situ hybridization revealed that cocaine self-administration increased levels of preprodynorphin, but not preproenkephalin, c-fos, or zif/268 mRNAs in a patchy pattern in the d...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(95)00049-k
更新日期：1995-01-01 00:00:00
abstract：:Previous cytoarchitectural and electron micrographic studies have indicated that the gustatory zone of the nucleus of the solitary tract (NST) may contain local circuit neurons. It is known that neurons of the caudal "visceroceptive" NST contain GABA, glutamic acid decarboxylase (EC 4.1.1.15), and GABA-transaminase (G...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(88)90202-x
更新日期：1988-10-01 00:00:00
abstract：:An inexpensive multielectrode voltammetry system designed for in vivo neurochemical studies of the awake, unanesthetized primate has been developed. Consisting of an Apple II Plus microcomputer, parallel operational amplifier circuitry for six working electrodes, and commercially available interface boards, the system...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(83)90097-7
更新日期：1983-03-01 00:00:00
abstract：:Following main olfactory bulb (MOB) stimulation at frequencies of 0.1-0.3 Hz, in addition to early field potentials, a frequency-sensitive, surface negative late N2 wave (latency range: 63-96 msec) followed occasionally by a late N3 transient, was evoked in the piriform cortex and endopiriform nucleus of the rat. The ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(88)90133-5
更新日期：1988-04-01 00:00:00
abstract：:Extracellular recordings were obtained in anaesthetized rats from single neurons located in various structures around the rostral end of the third ventricle, known to harbour integrative neurons sensing deficiencies in and originating corrective responses for water-electrolyte balance. Once arginine vasopressin (AVP) ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(88)90097-4
更新日期：1988-06-01 00:00:00
abstract：:The Tac4 gene-derived hemokinin-1 (HK-1) is present in pain-related regions and activates the tachykinin NK1 receptor, but with binding site and signaling pathways different from Substance P (SP). NK1 receptor is involved in nociception, but our earlier data showed that it has no role in chronic neuropathic hyperalges...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2019.01.015
更新日期：2019-04-01 00:00:00
abstract：:Several studies have demonstrated that a descending dopaminergic pathway innervates the dorsal and the intermediate gray matter of the spinal cord and have suggested that this pathway is involved in pain modulation and in the control of autonomic functions. Other studies have also demonstrated the presence of dopamine...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(93)90259-e
更新日期：1993-01-01 00:00:00
abstract：:The cytoskeleton is the major intracellular structure that determines the morphology of neurons and maintains their structural integrity. It is therefore not surprising that a disturbance of cytoskeletal structure and functionunderlies many neurodegenerative diseases. This special issue brings together current informa...
journal_title：Brain research bulletin
pub_type： 社论
doi：10.1016/j.brainresbull.2016.08.003
更新日期：2016-09-01 00:00:00
abstract：:A method is described for the removal of discrete areas of the monkey brain. A detailed mapping of norepinephrine, dopamine, choline acetyltransferase and glutamic acid decarboxylase in the newborn and pubescent monkey brain is presented. ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(80)80016-5
更新日期：1980-07-01 00:00:00
abstract：:The effects of a unilateral lesion made on the right or left side of the preoptic area (POA) or anterior hypothalamic area (AHA) made on each day of the estrous cycle, were analyzed. Ovulation rate decreased among the animals with a lesion performed on the day of estrous on the right side of POA (1/7 vs. 7/7, p < 0.05...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(94)90230-5
更新日期：1994-01-01 00:00:00
abstract：:The susceptibility of the developing brain to hypoxia should depend on the lipid composition of the brain cell membrane; the rate of lipid peroxidation; the presence of antioxidant defenses; and the development and modulation of the excitatory neurotransmitter receptors such as the N-methyl-D-aspartate (NMDA) receptor...
journal_title：Brain research bulletin
pub_type： 杂志文章,评审
doi：10.1016/s0361-9230(98)00170-1
更新日期：1999-02-01 00:00:00
abstract：:Binary mixtures of acid with salt were observed to produce enhancing effects on oral chemoreceptor responses by recording the activity of the whole glossopharyngeal nerve of the clawed toad (Xenopus laevis). The mixtures of HCl with various inorganic salts elicited responses larger than the sum of the responses to ind...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(96)00326-7
更新日期：1997-01-01 00:00:00
abstract：:The spontaneous activity of hippocampal and denate units was investigated in acute and chronic experiments on adult rats. Spontaneous unitary discharges from both regions were measured before and after brief tetanic stimulation of the entorhinal cortex. An increase in the frequency of spontaneous unit activity was obt...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(76)90043-5
更新日期：1976-01-01 00:00:00
abstract：:An enhanced production of hypothalamic neuropeptide Y (NPY) now appears to underlie a number of hyperphagia syndromes. However, the role of NPY in the hyperphagia induced by hypothalamic lesions has not yet been explored. Here, hypothalamic lesions were induced in mice by administration of goldthioglucose (GTG) and br...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(92)90071-5
更新日期：1992-09-01 00:00:00
abstract：:Most of the lateral hypothalamic neurons responding to moderate changes in blood glucose fail to be affected by direct glucose applications. Therefore their sensitivity to glycemic level must be mediated by an indirect mechanism. In order to test whether adrenergic afferents might be involved, the activity of lateral ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(91)90086-y
更新日期：1991-04-01 00:00:00
abstract：:It is generally assumed that the primary response of the rat flash evoked potential (FEP) is activated by a retino-geniculate path, and that the secondary response reflects input to the cortex by way of the superior colliculus (SC) or other brainstem structures. In the present study, male Long-Evans rats were implante...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(86)90037-7
更新日期：1986-02-01 00:00:00
abstract：:The effects of separate and simultaneous recombinant bovine (rb) activin A and buserelin administration on the FSH release and pituitary FSH beta subunit gene expression in vivo were examined in ovariectomised, estradiol pretreated rats. The animals received a single injection of either rb activin A (50 ng), buserelin...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(02)00821-3
更新日期：2002-09-15 00:00:00
abstract：:Ca(2+)/calmodulin-dependent kinase II (CaMKII) is an abundant synaptic signalling molecule that is essential for memory formation and the induction of synaptic potentiation. Additionally, CaMKII plays a prominent role in synaptic tagging and metaplasticity. These abilities are mediated by kinase activity as well as bi...
journal_title：Brain research bulletin
pub_type： 杂志文章,评审
doi：10.1016/j.brainresbull.2010.10.009
更新日期：2011-04-25 00:00:00
