Abstract:
:The primary auditory cortex is subject to the modulation of numerous neurotransmitters including norepinephrine (NE), which has been shown to decrease cellular excitability by yet unclear mechanisms. We investigated the possibility that NE directly affects excitatory glutamatergic synapses. We found that bath applications of NE (20 microM) decreased glutamatergic excitatory post-synaptic currents (EPSCs) in all cortical layers. Changes in the kinetics of synaptic EPSCs, invariance of pair pulse ratio and of the coefficient-of-variation, together with the decrease of responses to pressure-application of AMPA (500 microM), indicated the postsynaptic nature of the adrenergic effect. Pharmacological experiments suggested that the NE-induced depression of EPSCs is caused by the activation of alpha1 adrenoceptors, PLC, and a Ca(2+)-independent PKC. We speculate that the decrease in temporal cortex excitability might promote a posterior-to-anterior shift in cortical activation together with a decrease in spontaneous background activity, resulting eventually in more effective sensory processing.
journal_name
Neurochem Resjournal_title
Neurochemical researchauthors
Dinh L,Nguyen T,Salgado H,Atzori Mdoi
10.1007/s11064-009-9966-zsubject
Has Abstractpub_date
2009-11-01 00:00:00pages
1896-906issue
11eissn
0364-3190issn
1573-6903journal_volume
34pub_type
杂志文章abstract::Bovine brain synaptic membranes which were frozen and then extensively washed showed low affinity [3H]muscimol binding. These membranes contained GABA and calmodulin, apparently tightly bound within the membrane fraction. Membranes which were additionally treated with the detergent Triton X-100 showed high affinity [3...
journal_title:Neurochemical research
pub_type: 杂志文章
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abstract::Deciphering what governs inflammation and its effects on tissues is vital for understanding many pathologies. The recent discovery that glycogen synthase kinase-3 (GSK3) promotes inflammation reveals a new component of its well-documented actions in several prevalent diseases which involve inflammation, including mood...
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pub_type: 杂志文章,评审
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pub_type: 杂志文章
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pub_type: 杂志文章
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更新日期:2018-05-01 00:00:00
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journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00965136
更新日期:1982-08-01 00:00:00
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journal_title:Neurochemical research
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journal_title:Neurochemical research
pub_type: 杂志文章
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更新日期:1987-10-01 00:00:00
abstract::To assess RNAi mediated inhibition of the expression of wt-DYT1 on H(2)O(2)-induced toxicity in NIH 3T3 cells and primary cortical neurons. To detect the function of wild-type Torsin A and the effect of SiRNA on the wt-DYT1 gene. The shRNA expression vector was constructed by ligating annealed complementary shRNA olig...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-010-0177-4
更新日期:2010-08-01 00:00:00
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journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1023/a:1012331108641
更新日期:2001-10-01 00:00:00
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pub_type: 杂志文章
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journal_title:Neurochemical research
pub_type: 杂志文章
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journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1023/a:1022460216822
更新日期:1998-01-01 00:00:00
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journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-011-0676-y
更新日期:2012-04-01 00:00:00
abstract::In vitro aggregation and fibrillization of synthetic amyloid beta-protein Abeta 1-40 was assessed in the conditioned media from rhabdomyosarcoma (CRL 1598, HTB 82, HTB 153, CCL 136), adenocarcinoma (CCL 218), neuroblastoma (SY5Y), and COS cells cultured in the absence and presence of 10% heat-inactivated fetal bovine ...
journal_title:Neurochemical research
pub_type: 杂志文章
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更新日期:1997-02-01 00:00:00
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journal_title:Neurochemical research
pub_type: 杂志文章,评审
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abstract::Several studies showed that the up-regulation of glial glutamate transporter-1 (GLT-1) participates in the acquisition of brain ischemic tolerance induced by cerebral ischemic preconditioning or ceftriaxone pretreatment in rats. To explore whether GLT-1 plays a role in the acquisition of brain ischemic tolerance induc...
journal_title:Neurochemical research
pub_type: 杂志文章
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journal_title:Neurochemical research
pub_type: 杂志文章
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更新日期:2007-08-01 00:00:00
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journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-019-02915-0
更新日期:2020-02-01 00:00:00
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pub_type: 杂志文章
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journal_title:Neurochemical research
pub_type: 杂志文章
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更新日期:1987-07-01 00:00:00
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journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-004-2439-5
更新日期:2005-02-01 00:00:00
abstract::CNTF (ciliary neurotrophic factor) has been suggested to be an important survival factor for oligodendrocytes; however, this effect is inconsistently obtained and myelination appears normal in CNTF null animals. On the other hand, CNTF stimulates astrocytes to produce growth and trophic factors. Therefore, we tested t...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-006-9151-6
更新日期:2007-02-01 00:00:00