Abstract:
:Cholinergic mechanisms in the septohippocampal pathway contribute to several cognitive functions and impaired cholinergic transmission in this pathway may be related to the memory loss and dementia that accompanies normal aging and Alzheimer's disease and behavioral studies suggest that muscarinic mechanisms in the medial septum/diagonal band of Broca (MSDB) may contribute to these functions. The goal of the present study was to begin a characterization of the physiological and pharmacological effects of muscarine on antidromically identified septohippocampal neurons (SHNs). Muscarinic agonists produced a concentration-dependent excitation in >90% of SHNs tested using extracellular recordings in an in vitro rat brain slice preparation. The SHNs excited by muscarine had a broad range of conduction velocities (0.2 to 3.7 m/s; mean: 1.6+/-0.06 m/s; n=110), suggesting involvement of neurons with both slow (possibly cholinergic) and fast (possibly GABAergic) conducting fibers. The muscarine-induced excitations in SHNs were found not to be mediated via M1, M2 or M4 receptors, as they were not blocked by the M1-selective antagonists, pirenzepine or telenzepine or by the M2/M4-selective antagonist, methoctramine. In contrast, the M3-selective antagonist, 4-DAMP-mustard, blocked muscarinic excitations in a majority of SHNs, indicating the presence of M3 as well as non-M3-type responses. McN-A-343, an M1 and M5-selective agonist, excited 33% of neurons tested, confirming involvement of non-M3 receptors (possibly M5) and M3 receptors. Since the cholinergic and GABAergic MSDB neurons together innervate almost every type of hippocampal neuron, the effects of muscarine on SHNs would also have a profound effect on hippocampal circuitry.
journal_name
Brain Resjournal_title
Brain researchauthors
Liu W,Kumar A,Alreja Mdoi
10.1016/s0006-8993(98)00729-xsubject
Has Abstractpub_date
1998-09-14 00:00:00pages
220-33issue
1-2eissn
0006-8993issn
1872-6240pii
S0006-8993(98)00729-Xjournal_volume
805pub_type
杂志文章相关文献
BRAIN RESEARCH文献大全abstract::Whole-cell patch-clamp recordings were undertaken to characterize and compare the membrane properties of deep dorsal horn neurons in transverse slices of rat lumbar spinal cord in two age groups, postnatal days (P) 3-6 and 9-16. In both age groups, significant correlations were observed between membrane time constant ...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(97)00578-7
更新日期:1997-09-05 00:00:00
abstract::Following infection with influenza virus, animals display decreased locomotor activity and feeding behavior and loss of body weight. It has been suggested that these effects may be mediated by cytokines, such as interleukin-1 (IL-1), interleukin-6 (IL-6) and tumor necrosis factor alpha (TNF-alpha), induced by the infe...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(97)01009-3
更新日期:1997-11-21 00:00:00
abstract::Recently we have reported that methamphetamine (METH) neurotoxicity in rats depends on the environmental temperature. Here, we evaluate whether a cold environment (4 degrees C) or drugs which chloride and glutamate ion channel function block METH neurotoxicity in mice. Adult male CD mice received METH i.p. (4 x 10 mg/...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(09)90007-5
更新日期:1994-09-26 00:00:00
abstract::In the present study, the light responses of ganglion cells to chromatic stimulus were recorded from isolated retina of neonatal chick. It was found that for some non-color-opponent ganglion cells, the spatiotemporal patterns of the cells' light responses were related to the chromatic information that they received. W...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2005.07.077
更新日期:2005-10-12 00:00:00
abstract::The synaptic relationship between neuronal structures reacting with antibodies to tyrosine hydroxylase (TH) and Leu- or Met-enkephalin (ENK) was studied by the 'mirror technique' in adjacent sections of rat neostriatum. TH-immunoreactive (TH-IR) axonal boutons surrounding the neural perikarya and proximal dendrites of...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(86)91622-7
更新日期:1986-03-05 00:00:00
abstract::Administration of either Tyr-D-Ala-Gly-MePhe-Gly(ol) (DAGO), a mu-opioid agonist, or nicotine into the VTA (A10) caused an increase in both dopamine (DA) and its metabolite levels in both the A10 region and DA nerve terminals in the nucleus accumbens of rats when assessed with dual probe brain dialysis. These findings...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(93)90087-4
更新日期:1993-10-08 00:00:00
abstract::The effect of suprachiasmatic nucleus (SCN) ablation on rhythms in brain neurotransmitter receptors was studied. In control animals, the rhythms in the number of alpha-adrenergic and benzodiazepine receptors were circadian, whereas the rhythms in beta-adrenergic and acetylcholine receptors were ultradian. SCN ablation...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(85)91533-1
更新日期:1985-02-18 00:00:00
abstract::Brain-derived neurotrophic factor (BDNF) promotes survival of injured dopaminergic nigrostriatal neurons of the adult rodent substantia nigra pars compacta, as well their development in vitro. BDNF deficiency may play a role in Parkinson's disease, as the surviving dopaminergic nigrostriatal neurons have reduced level...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2005.01.052
更新日期:2005-03-28 00:00:00
abstract::In rat hippocampal slices, the novel metabotropic glutamate receptor (mGluR) ligand, (1S,1'R,2'R,3'R)-2-(2,3-dicarboxycyclopropyl)glycine (DCG-IV) enhanced the stimulation of polyphosphoinositide (PPI) hydrolysis elicited by quisqualate or by submaximal concentrations of ibotenate or (1S,3R)-1-aminocyclopentane-1,3-di...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(94)90857-5
更新日期:1994-10-03 00:00:00
abstract::Recent studies suggest that apolipoprotein E (apoE) might play a neurotrophic function in the central nervous system and that altered functioning of this molecule could result in neurodegeneration. The main objective of this study was to determine if neurodegenerative and cognitive alterations in apoE-deficient mice a...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(96)01420-5
更新日期:1997-03-21 00:00:00
abstract::The effects of 3 different non-noxious stressors on body temperature (Tb) were investigated in the rat: (1) loose restraint in cylinders, (2) removal of the rats from cylinders, exposure to a novel environment and replacement in cylinders, a stressor called here 'novelty', and (3) gentle holding of the rats by the nap...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(84)90537-7
更新日期:1984-04-09 00:00:00
abstract::Tissue accumulation of ornithine (Orn), homocitrulline (Hcit), ammonia and orotic acid (Oro) is the biochemical hallmark of patients affected by hyperornithinemia-hyperammonemia-homocitrullinuria (HHH) syndrome, a disorder clinically characterized by neurological symptoms, whose pathophysiology is practically unknown....
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2009.07.021
更新日期:2009-09-29 00:00:00
abstract::Increasing evidence shows that exposure to an enriched environment (EE) after cerebral ischemia/reperfusion injury is neuroprotective in animal models. Recent studies have demonstrated that animals housed in an enriched environment condition after an experimental stroke obtained a better functional outcome than those ...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2013.09.036
更新日期:2013-11-13 00:00:00
abstract::The presence and localization of synapsin I were investigated in the cat vestibular epithelium, using a rabbit anti-synapsin I antibody. The staining was performed by immunofluorescence or by a peroxidase-anti-peroxidase technique. A strong immunoreactivity was observed with both methods. It appeared as spherical patc...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(86)91176-5
更新日期:1986-10-08 00:00:00
abstract::In order to obtain further insight into the interactions between the purinergic and dopaminergic pathways in the striatum, we studied both metabolisms simultaneously, using a microdialysis technique in 1-methyl-1,4-phenylpyridinium ion (MPP+) unilaterally-denervated conscious rats. In these rats the contralateral side...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(89)90052-8
更新日期:1989-03-27 00:00:00
abstract::Spontaneous interictal spikes (SISs) were recorded in the hippocampus in freely behaving rats following hippocampal stimulations that resulted in afterdischarges (ADs). Hippocampal SISs were detected after an average of 5 (range 2-10) daily ADs. The rate of SISs typically increased minutes after a tetanus, and then de...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(90)90472-n
更新日期:1990-04-16 00:00:00
abstract::The mesolimbic dopamine (DA) system has long been known to be involved in reward behaviors. As with other substances of abuse, it has been extensively reported that ethanol influences the dopaminergic system. The present study examined whether selectively bred Sardinian-alcohol-preferring (sP) and Sardinian alcohol no...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(01)03296-6
更新日期:2002-01-11 00:00:00
abstract::Picture-word interference is a widely employed paradigm to investigate lexical access in word production: Speakers name pictures while trying to ignore superimposed distractor words. The distractor can be congruent to the picture (pictured cat, word cat), categorically related (pictured cat, word dog), or unrelated (p...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2012.02.050
更新日期:2012-04-23 00:00:00
abstract::Multiple sigma receptor subtypes have been identified in the hippocampus, yet their physiological role remains largely undefined. In the current study, we examined the role of sigma receptors in the regulation of N-methyl-D-aspartate (NMDA)-stimulated [3H]norepinephrine ([3H]NE) release from rat hippocampal slices. Bo...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(94)01394-w
更新日期:1995-02-27 00:00:00
abstract::Glutamate is an excitatory neurotransmitter implicated in the pathogenesis of psychiatric disorders. Glutamate results in the activation of an enzyme called glycogen synthase kinase-3 (GSK-3) acting through N-methyl-d-aspartate (NMDA) receptors. Impaired expression of GSK-3 affects behavior and neurochemicals level in...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2018.10.002
更新日期:2019-02-01 00:00:00
abstract::The stimulatory effect of insulin-like growth factor I (IGF-I) on myelin basic protein (MBP) expression, a parameter for oligodendrocyte development, is mediated by the MAPK and PI3K signaling pathways. We have previously shown that the second messenger cAMP inhibits IGF-I-induced MAPK activation as well as MBP expres...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2007.07.018
更新日期:2007-10-31 00:00:00
abstract::The potential evoked in the pyriform cortex by single-pulse stimulation of the olfactory bulb was examined before and after single and repeated elicitation of an epileptiform afterdischarge produced by stimulation of the olfactory bulb. A single afterdischarge (AD) produced a rapid (i.e. within 5 min) increase in the ...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(85)91275-2
更新日期:1985-12-30 00:00:00
abstract::Experiments were undertaken to compare effects of the NMDA and non-NMDA receptor antagonists, AP5 (40 microM) and NBQX (10 microM), on glutamate-induced firing in supraoptic oxytocin (OT) and vasopressin (VP) neurones in vitro. In putative OT neurones NBQX caused a significantly greater reduction in firing than AP5, w...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(97)00728-2
更新日期:1997-08-29 00:00:00
abstract::The striatum has nearly equal numbers of striatonigral and striatopallidal projection neurons. All are GABAergic and inhibitory, but they lie in separate neuronal circuits ('direct' and 'indirect', respectively) that appear to exert opposite effects on movement. Methods are needed to evaluate the function of each circ...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(00)03170-x
更新日期:2001-03-09 00:00:00
abstract::This study examined the effect of feeding either a bland cornstarch-based diet (BCD) or a highly palatable, high fat diet containing sucrose (HPD) on hypothalamic arcuate nucleus (ARC) gene expression for neuropeptide-Y (NPY). Male Sprague-Dawley rats received either BCD ad libitum, HPD ad libitum, HPD pair-fed to the...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(98)00755-0
更新日期:1998-09-21 00:00:00
abstract::Intracellular and extracellular recordings from CA3 hippocampal neurons in vitro were used to study the ability of several NMDA (N-methyl-D-aspartate) receptor antagonists to suppress epileptiform bursts induced by NMDA and convulsants not thought to act at NMDA receptors. The antagonists, APV (D-2-amino-5-phosphonova...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(88)90642-7
更新日期:1988-09-06 00:00:00
abstract::Spatial neglect may involve neglect dyslexia resulting in a failure to identify words or parts of words in the contralesional hemispace. The present study explored a well-documented dissociation in neglect dyslexics' word processing, i.e. impaired reading aloud in the presence of good lexical decision performance for ...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2007.10.069
更新日期:2008-01-16 00:00:00
abstract::Ibotenic acid lesions of the vertical limb of the diagonal band of Broca (VDB) in marmosets produced significant depletions in choline acetyltransferase (ChAT) activity and a decrease in acetylcholinesterase (AChE) staining in the hippocampal formation and entorhinal cortex (to which the cholinergic neurones of the VD...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(88)90348-4
更新日期:1988-07-19 00:00:00
abstract::Glial cell line-derived neurotrophic factor (GDNF) activates protein kinase Akt/PKB by phosphorylation (p-Akt) which plays key roles in cell survival. In the current study, we investigated a temporal expression of p-Akt by immunohistochemical analysis after a topical application of GDNF to normal cerebral hemisphere o...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(02)03521-7
更新日期:2002-12-27 00:00:00
abstract::Microinjection of a substance P analogue (1 mM; 7 or 10 nl) into laminae I and II of the L7 dorsal horn of decerebrate cats significantly potentiated (P < 0.05) the increase in arterial pressure evoked by microinjection of L-glutamate (109 mM; 7 or 10 nl) into these spinal sites. Microinjection of the substance P anal...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(97)00362-4
更新日期:1997-06-06 00:00:00