Abstract:
:Norepinephrine (NE), acting on brain adrenoceptors, plays an important role in barrel field neuronal activity and plasticity. For this reason, the distribution of alpha 1- and alpha 2-adrenoceptors in the somatosensory cortex barrel field was studied by autoradiographic techniques in rats undergoing plastic change or NE depletion. In layers IV and V of the cortex, the pattern of alpha 1-adrenoceptors (assessed by [3H]prazosin binding) varied across the barrel field. There was relatively low binding within the barrels themselves, with 21% higher binding in the surrounding septa. alpha 2-Adrenoceptor binding (assessed with [3H]paraminoclonidine) was almost homogeneous across the entire barrel field. Two weeks after noradrenergic deafferentation by unilateral lesioning of the locus coeruleus, there was a 16% upregulation of [3H]prazosin binding. This then returned to control levels of by 8 weeks. Peripheral deafferentation of sensory input to the barrel field produced the opposite effect on alpha 1-adrenoceptors. Unilateral removal of all but the central (C3) vibrissa (which induces plastic changes in the cortical representation of the spared virbrissa) caused a 12% decrease in [3H]prazosin binding in the whole barrel field at 2 weeks after surgery which returned to normal by 8 weeks. Therefore, alpha 1-adrenoceptors in the barrel field of the rat are affected in opposite ways by changes in NE content and afferent sensory input. We hypothesize that alpha 1-adrenoceptor levels are modulated after vibrissectomy through either an indirect reaction to reduced cortical gamma-aminobutyric acid levels, or by a reordering of metabolic priorities during plastic change of the cortical neuronal network.
journal_name
Brain Resjournal_title
Brain researchauthors
Dunn-Meynell AA,Levin BEdoi
10.1016/0006-8993(93)90005-8subject
Has Abstractpub_date
1993-09-24 00:00:00pages
25-32issue
1eissn
0006-8993issn
1872-6240pii
0006-8993(93)90005-8journal_volume
623pub_type
杂志文章相关文献
BRAIN RESEARCH文献大全abstract::Spontaneous alternation which is disrupted by lesion of septal dopaminergic (DA) afferents was chosen as a behavioral marker for the study of functional interactions between DA and noradrenergic (NA) innervation of the lateral septum. Three groups of rats were studied: a solvent group which received only vehicle injec...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(91)90669-m
更新日期:1991-06-21 00:00:00
abstract::The uptake of amino acids into slices of adult and newborn mouse brain was studied in relation to Na+ flow. (1) The level of Na+ and K+ incubated slices of brain depends on the ionic composition of the incubation medium. The intracellular levels of Na+ in adult tissue are below, in fetal tissue above, Na+ levels in th...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(75)90763-5
更新日期:1975-02-14 00:00:00
abstract::Visual acuity was measured by determining the highest spatial acuity at which chickens aged 1-25 days jumped consistently to a physically supported grating instead of to an unsupported homogeneous field. In contrast to the gradual visual development found for kittens, monkeys, and humans, the chicken exhibits asymptot...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(81)90967-7
更新日期:1981-05-04 00:00:00
abstract::Peripheral axotomy in neonatal rats induces neuronal death. We studied the anti-apoptotic protein Bcl-2 and cell death promoter Bax in spinal cord of neonatal rats after sciatic transection and treatment with melatonin, a neuroprotective substance. Pups were unilaterally axotomized at P2 and received melatonin (1 mg/k...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2006.07.021
更新日期:2006-09-27 00:00:00
abstract::Little is known about the cells or mechanisms of O2 chemoreception in vertebrates other than mammals. The purpose of this study, therefore, was to identify O2-sensitive chemoreceptors in a fish. Putative O2-sensitive chemoreceptors were dissociated from the gills of channel catfish, Ictalurus punctatus, and cultured. ...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2006.03.085
更新日期:2006-05-30 00:00:00
abstract::The extrafusal and intrafusal muscle fibers in the masseter muscle are innervated by motoneurons in the trigeminal motor nucleus (Mo 5). In the present study, we found that the number of trigeminal motor neurons in the male mouse was significantly larger than that in the female. However, we could not detect any signif...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(93)90763-d
更新日期:1993-11-05 00:00:00
abstract::The present study was undertaken in order to study the rate of maturation of the cochlear action potential sensitivity, latency, and tuning curves for various stimulus frequencies and to correlate the development of latency and frequency selectivity with threshold development. This study showed a two-stage model of ma...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0165-3806(87)90239-2
更新日期:1987-12-15 00:00:00
abstract::Cortical sensory neurons synchronize their activity at multiple frequency bands after an external stimulation. In the somatosensory cortical areas, previous reports describe more discrete and somatotopically specific neural synchronization at the gamma band. Therefore, an efficient gamma synchronization of the neurons...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(03)03171-8
更新日期:2003-10-03 00:00:00
abstract::Recent developments in the understanding of the neurophysiological mechanisms underlying electroencephalographic (EEG) slow waves and sleep spindles imply an inverse relationship between these two EEG activities. The interrelationship between slow wave activity (0.75-4.5 Hz) and sleep-spindle activity (12-15 Hz) in el...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(93)90579-c
更新日期:1993-10-29 00:00:00
abstract::The central nervous system (CNS) in adult mammals loses the ability to regenerate after injury. Although electrical stimulation (ES) has been shown to promote neural regeneration, the underlying mechanisms by which ES enhances CNS regeneration remain elusive. The aim of the present study was to investigate the effect ...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2012.08.041
更新日期:2012-10-22 00:00:00
abstract::Transport of the hexapeptide dalargin across the blood-brain barrier was accomplished using a nanoparticle formulation. The formulation consisted of dalargin bound to poly(butyl cyanoacrylate) nanoparticles by sorption, coated with polysorbate 80. Intravenous injection of this formulation to mice resulted in an analge...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(95)00023-j
更新日期:1995-03-13 00:00:00
abstract::The interaction of glutamatergic and dopamine neurotransmission is thought to have relevance to both the pathophysiology and pharmacotherapy of schizophrenia. For example, subanesthetic doses of the N-methyl-D-aspartate receptor (NMDA-R) antagonist ketamine induce schizophrenia-like behavioral effects in humans and bo...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(01)01991-6
更新日期:2001-03-16 00:00:00
abstract::Antibody microprobes were used to study the release of immunoreactive neurokinin A into the spinal cord of anaesthetised cats during and following injection of a knee joint with kaolin and carrageenan. A basal level of immunoreactive neurokinin A was detected prior to any noxious stimuli. Innocuous mechanical joint st...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(90)91352-h
更新日期:1990-11-19 00:00:00
abstract::To investigate the role of the amygdala in central regulation of pancreatic exocrine secretion, the effects of electrolytic lesions on pancreatic secretion were studied in rats. Small bilateral electrolytic lesions in amygdaloid body restricted to basolateral, medial and central nuclei were produced. Eight days after ...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(85)90770-x
更新日期:1985-08-05 00:00:00
abstract::The present study investigated the effect of dextromethorphan and 6,7-dinitroquinoxaline-2,3-dione (DNQX) pre-treatment on the development of cocaine- and lidocaine-induced seizures. The dopaminergic action of cocaine was also studied. The NMDA antagonist dextromethorphan and the non-NMDA (AMPA/kainate) antagonist DNQ...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(97)00147-9
更新日期:1997-05-09 00:00:00
abstract::The development of spontaneous activity in response to morphine administration was studied at different postnatal ages in C57BL/6 mice. Morphine induced hyperactivity at all ages except in 3-week-old mice, in which a catatonic effect is evident. The results indicate that the neurophysiological and inhibitory systems r...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0165-3806(81)90029-8
更新日期:1981-11-01 00:00:00
abstract::The radioligand [125I]alpha-bungarotoxin (alpha-BTX) has been used to test receptor binding to putative nicotinic cholinergic receptors in the hypothalamus. Using light microscopic autoradiography following third ventricular infusion of the radioligand we have previously demonstrated that in normally cycling rats and ...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(84)90736-4
更新日期:1984-01-02 00:00:00
abstract::Soluble epoxide hydrolase (sEH) is the major enzyme responsible for the metabolism and inactivation of epoxyeicosatrienoic acids (EETs). EETs are produced by the cytochrome P450 (CYP) epoxygenase pathway of arachidonic acid (AA) metabolism and tend to be anti-hypertensive, anti-inflammatory and protective against isch...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2009.07.060
更新日期:2009-09-29 00:00:00
abstract::Post-traumatic invasion of macrophages into the cochlear nerve of the rat and measurement of how their invasion was modified by the administration of methylprednisolone were investigated for the first time by using a reproducible and quantifiable experimental model of cochlear nerve injury. Two weeks after precise coc...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(01)02523-9
更新日期:2001-06-29 00:00:00
abstract::Unilateral 6-hydroxydopamine (6-OHDA) lesions of substantia nigra pars compacta (SNPC) neurons in rats induce behavioural hypersensitivity to dopaminergic agonists. However, the role of specific dopamine receptors is unclear, and potential alterations in their transduction mechanisms remain to be evaluated. The presen...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(01)02927-4
更新日期:2001-11-30 00:00:00
abstract::Recent studies have demonstrated the neuroprotective properties of the novel imidazoquinoline benzodiazepine receptor partial agonist, PNU-101017, in the gerbil forebrain ischemia model. The compound effectively reduces delayed post-ischemic (5 min bilateral carotid occlusion) hippocampal CA1 neuronal degeneration eve...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(98)00478-8
更新日期:1998-07-06 00:00:00
abstract::Calretinin and calbindin-D28k are two calcium-binding proteins which are present in separate populations of interneurons in cerebral cortex and hippocampus. To identify these cells with the populations expressing different transmitters, two-colour immunofluorescence was done with antibodies against the calcium-binding...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(92)91439-l
更新日期:1992-07-31 00:00:00
abstract::In order to elucidate the roles of hippocampal nitric oxide (NO) synthesis in working and reference memory performance of rats, the effects of intrahippocampal injections of the NO synthase inhibitor, NG-nitro-L-arginine methyl ester (L-NAME), on this behavior were examined with a three-panel runway task. In the worki...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(93)91135-f
更新日期:1993-12-31 00:00:00
abstract::The sexually dimorphic nucleus of the preoptic area (SDN-POA) is the most striking structure displaying a morphological sex difference in the rat brain. A potentially homologous nucleus has been identified in the human hypothalamus. The objective of the present study was to pursue the putative homology of the rat and ...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(96)01005-0
更新日期:1996-12-02 00:00:00
abstract::Deferoxamine (DFO) has shown therapeutic promise for the treatment of Parkinson׳s disease (PD) as it has reduced both behavioral and biochemical deficits when injected into the brain of rodent models of PD. Intranasally administered DFO targets the brain directly but non-invasively and has been effective in animal mod...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2014.05.048
更新日期:2014-07-29 00:00:00
abstract::The purpose of the present investigation was to record electrophysiological responses from single fibers in the hamster superior laryngeal nerve (SLN) that were responsive to chemical stimulation of the larynx. Twenty chemical solutions, commonly used in studies of mammalian gustatory physiology, were applied to taste...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(88)91541-7
更新日期:1988-05-31 00:00:00
abstract::The urethrogenital (UG) reflex is a spinal sexual reflex which is tonically inhibited in the intact male rat by neurons in the nucleus paragigantocellularis (nPGi). The medial preoptic area of the hypothalamus (MPOA) is involved in the activation of male sexual behavior. The present study examines the effect of hypoth...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(94)90638-6
更新日期:1994-02-28 00:00:00
abstract::Hippocampal long-term potentiation (LTP) is considered as a cellular model of memory formation. Specific, electrical weak tetanization of distinct afferents such as the medial perforant path results in a short-lasting, protein synthesis-independent early-LTP (up to 4 h) within the dentate gyrus. A stronger tetanizatio...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2009.03.055
更新日期:2009-06-01 00:00:00
abstract::Effects of protein kinase C (PKC) activation on the function of the GABA/benzodiazepine receptor-chloride complex were analyzed by quantitative autoradiography using [3H]muscimol, [3H]flunitrazepam and [35S]TBPS in rat brain slices. The density of [3H]muscimol binding was highest in cerebellar granular layers and high...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(99)02127-7
更新日期:1999-12-11 00:00:00
abstract::Maternal cigarette use during pregnancy is associated with increased incidence of neural impairments in offspring, but nicotine's unique contribution to any neuropathology remains unclear, and nicotine's neurodevelopmental effects assessed in animal models vary with concentration. During ontogenesis, the chick oculomo...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2003.11.070
更新日期:2004-03-12 00:00:00