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The effect of morphine on N-cadherin expression in addiction rat VTA

The effect of morphine on N-cadherin expression in addiction...

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中国神经科学学会第九届全国学术会议暨第五次会员代表大会

作者： Jun-Ping CAO~(1,2,*),Hong-Jun WANG~(1,2),Jing MENG~(1,2),Jing-Ru WU~(1,2) 1 Jiangsu Province Key Laboratory of Anesthesiology and 2 Centerfor Pain Research and Treatment,Xuzhou Medical College,Xuzhou 221002,China

Objective The dopaminergic(DA)neurons in the ventral tegmental area(VTA)are widely implicated in the addiction and natural reward circuitry of the *** exposure can trigger synaptic plasticity and morphology changes in VTA DA neurons.N-cadherin is involved in the regulation of cell-cell adhesion and in morphology and plasticity *** present study was to explore whether N-cadherin expression is altered in VTA after morphine *** The co-expression of N-cadherin and DA neurons was identified by double-labelling immunofluorescence,and the alteration of N-cadherin expression was detected by RT-PCR, immunohistochemistry and Western-blot *** The results of immunofluorescence double staining showed that N-cadherin was extensively expressed in the DA neurons in the rat *** administration of morphine(5 days)resulted in a time-dependent up-regulation of N-cadherin expression at the level of mRNA and *** These data indicated that the expression of N-cadherin was up-regulated by chronic morphine and this alteration may contribute to the development of the opiate-induced changes in DA morphology and behaviors.

关键词： morphine N-cadherin DA neurons VTA

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Haptic decision-making related neuronal activity in primary somatosensory cortex

Haptic decision-making related neuronal activity in primary ...

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中国神经科学学会第九届全国学术会议暨第五次会员代表大会

作者： Liping WANG,Xianchun LI,Peng GUI,Yong-Di ZHOU Key Laboratory of Brain Functional Genomics(Ministry of Education),Institute of Cognitive Neuroscience,East China Normal University,Shanghai 200062,China

The neuronal activity in SI cortex was collected when monkeys performed a haptic-haptic(HH) delayed matching-to-sample *** found that in trials with correct task performance a substantial number of cells showed significant differential neural activity only when the monkeys had to make a choice between two different haptic *** of incorrect trials showed that such a difference in neural activity was significantly reduced. However,the choice differential neural activity was barely observed in monkeys who performed a control task that was identical to the HH task but did not require the animal to either actively memorize the sample,or make a choice between the two objects at the end of the *** all the above results together,we believe that the differential activity may be a neural correlate of decision making,and thus conclude that some SI cells function particularly in the process of decision making when the animal has to make a haptic *** findings indicate for the first time that primary sensory cortex may play an important role in decision making.

关键词： Haptic decision-making related neuronal activity in primary somatosensory cortex

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Up-regulation of astroglial lipid-sensitive two-pore domain potassium channel TREK-1 in rat CNS after focal ischemia

Up-regulation of astroglial lipid-sensitive two-pore domain ...

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中国神经科学学会第九届全国学术会议暨第五次会员代表大会

作者： Yang LIU~1,Jing-Jiao SONG~2,Ming-Huan WANG~1,Jian-Qing YUAN~1,Wei WANG~1,Zhi-Yuan YU~1,Min-Jie XIE~(1,*) 1 Department of Neurology,Tongji Hospital,Tongji Medical College,Huazhong University of Science and Technology, Wuhan 430030,China 2 Division of Clinical Immunology,Tongji Hospital,Tongji Medical College,Huazhong University of Science and Technology,Wuhan 430030,China

The lipid-sensitive mechano-gated TREK-1 has been shown to be predominantly expressed in the CNS. However,its regional and cellular expression under ischemic conditions remains to be *** this study,we examined the expression of TREK-1 in the rat central nervous system using an immunohistochemical approach under physiological and focal ischemia *** results show that TREK-1 was broadly expressed in the cortex, CA1 and DG region of hippocampus and subventricular ***,TREK-1 was preferentially expressed on *** focal ischemia,the TREK-1 expression was obviously increased at days 3,7 and 30 following reperfusion compared with control,which correlated with activation and proliferation of *** TREK-1 mediated K conductance establishes a low resting membrane potential for the optimal operation of astrocyte brain homeostatic functions,these data provides important insights into the astrocytic TREK-1 involvement in ischemia pathology.

关键词： TREK-1 channel astrocyte cerebral ischemia hippocampus

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Neural mechanisms underlying crossmodal working memory:an EEG sLORETA study

Neural mechanisms underlying crossmodal working memory:an EE...

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中国神经科学学会第九届全国学术会议暨第五次会员代表大会

作者： Peng GUI,Liping WANG,Yong-Di ZHOU,Yixuan KU Institute of Cognitive Neuroscience,School of Psychology and Cognitive Science,East China Normal University, Shanghai,China

Working memory is essential to learning and performing sensory-motor behaviors that in many situations require the integration of stimuli of one modality with stimuli of *** the present study,we focused on the neural mechanisms underlying crossmodal working *** previous studies revealed that in perfonnance of the tactile crossmodal working memory task,there would be sequentially discrete task-correlated neural activities representing the processes of crossmodal working *** this study,participants performed the visual and auditory crossmodal working memory tasks while the EEG signals were *** positive event-related potential peaks LPC- 1 and LPC-2 were observed during the delay of the *** sLORETA analysis revealed that in the visual-tactile crossmodal task,LPC located in superior parietal cortex,while in the auditory-tactile crossmodal task,LPC located in supermarginal *** present study shows the sources of the late components which involved in crossmodal working *** with our former results of SI affected by crossmodal influence,this study revealed a potential processing flow from primary sensory cortices to association cortices.

关键词： Neural mechanisms underlying crossmodal working memory:an EEG sLORETA study LPC

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Tbx3 and Ptfla determine the expression of receptors of neurotransmitters and nueropeptides in the dorsal spinal cord

Tbx3 and Ptfla determine the expression of receptors of neur...

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中国神经科学学会第九届全国学术会议暨第五次会员代表大会

作者： Zhen GUO,Jing-Wen NING,Yi-Wen BU,Ying CHEN,Zhi-Qin XIE,Xiao-Lin ZHAO,Guan-Nan XIA, Le-Ping CHENG~* Institute of Neuroscience,Shanghai Institutes for Biological Sciences,Chinese Academy of Science,Shanghai 200031, China

Neurotransmitters and neuropeptides are of most importance in vertebrate central nervous system,which mediate most of the excitatory and inhibitory neural *** evoke postsynaptic electrical responses by binding to members of a repertoire of their receptors,which excite or inhibit *** between the excitation and inhibition within dorsal horn neurons of the spinal cord may lead to chronic *** and others' previous studies have showed that transcription factors Tlx1/3 and Ptf1a control the neurotransmitter phonotype of excitatory and inhibitory neurons respectively in the dorsal spinal *** we analyzed the expression of some neurotransmitters' and neuropeptides' receptors in the dorsal spinal cord of the developing mouse embryos using in situ hybridization and fate mapping *** found most of the receptors were expressed in the dorsal horn,some of which had specific expression ***,we found Tlx1/3 and Ptf1a were required for the expression of some selected receptors,while dispensable for most of other *** studies thus show that specific receptors are subject to local master transcription factors regulation and at the mean time provide several theoretical pain control targets in the dorsal spinal cord.

关键词： receptors Tlx3 Ptfla Lbxl Pax2 dorsal horn spinal cord

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Liver,contributes to upregulation of haptoglobin in serum from rats with traumatic brain injury

Liver,contributes to upregulation of haptoglobin in serum fr...

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中国神经科学学会第九届全国学术会议暨第五次会员代表大会

作者： Shu-Guang YANG,Yan-Hong MA,Yong LIU,Chang-Qiang ZHU,Meng JIANG,Shao-Jun LIU~* State Key Laboratory of Proteomics and Department of Neurobiology,Institute of Basic Medical Sciences,Beijing 100850,China

Proteomic analysis,including two-dimensional gel electrophoresis(2-DE)combined with mass spectrometry(MS),was used to compare the protein profile of serum samples from rats with traumatic brain injury(TBI) and normal ***(Hp),the acute phase response protein,showed an increased expression in rats with TBI versus normal and its change in serum was confirmed by Western ***,we found that Hp was mainly expressed in liver of rats with TBI and had an elevated mRNA *** further determine the source of the increased Hp in serum,in vitro studies using HL7702 lines and in vivo studies were *** results showed that Hp gene expression was also upregulated in HL7702 lines and liver treated with serum and brain homogenate from rats with *** findings suggest that the increased Hp in serum may result from overexpression of Hp in liver and modulated by a positive feedback loop between brain,blood and liver in response to TBI.

关键词： serum haptoglobin proteomics rat traumatic brain injury

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Identification and function analysis of novel microRNAs in rat dorsal root ganglia following sciatic nerve resection

Identification and function analysis of novel microRNAs in r...

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中国神经科学学会第九届全国学术会议暨第五次会员代表大会

作者： Shi-Ying LI,Bin YU,Deng-Bing YAO,Yong-Jun WANG,Fei DING,Xiao-Song GU~* Jiangsu Key Laboratory ofNeuroregeneration,Nantong University,Nantong 226001,China

Peripheral nerve injures are quite common in clinical practice and many studies have been conducted on their molecular *** is a relatively recent innovation to look for these molecular mechanisms in microRNAs (miRNAs).This paper focuses on the identification and function analysis of novel miRNAs in rat dorsal root ganglia(DRGs) following sciatic nerve resection,which is a classic model for studying peripheral nerve injures and *** Solexa sequencing,computational analysis and Q-PCR verification,114 novel miRNAs in rats were discovered and identified,of which 51 novel miRNAs were first reported in rat DRGs and 63 novel miRNAs were produced at days 1,4,7 and 14 after sciatic nerve *** further predicted target genes of these miRNAs and analyzed functional annotation of target *** data provide an important resource for the future analysis of function and regulation of miRNA,and contributes to further studies on the molecular mechanism relating to peripheral nerve injury and regeneration.

关键词： microRNAs DRGs rat solexa

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Stimulation of midbrain dopaminergic structures modifies firing rates of rat lateral habenula pain-activated neurons

Stimulation of midbrain dopaminergic structures modifies fir...

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中国神经科学学会第九届全国学术会议暨第五次会员代表大会

作者： Xue-Feng SHEN,Xiao-Guo RUAN,Hua ZHAO~* Department of Physiology,Norman Bethune College of Medicine,Jilin University,Changchun 130021,China

Ventral tegmental area and substantia nigra pars compacta are midbrain structures known to be involved in mediating *** structures give rise to dopaminergic projections that innervate the lateral habenula(LHb), which is also known to be involved in processing painful stimuli,but it's unclear what physiological effects these inputs have on habenular *** this study we distinguished the LHb pain-activated neurons and assessed their electrophysiological responsiveness to the stimulation of the ventral tegmental area and substantia nigra pars compacta with either single-pulse stimulation(300 uA,0.5 Hz) or tetanic stimulation(80 uA,25 Hz).Single-pulse stimulation that was delivered to either midbrain structure triggered transient inhibition of firing of LHb pain-activated neurons. However,tetanic stimulation of the ventral tegmental area tended to evoke an elevation in neuronal firing *** conclude that LHb pain-activated neurons can receive diverse reward-related signals originating from midbrain dopaminergic structures,and thus participate in the regulation of the brain reward system via both positive and negative feedback mechanisms.

关键词： habenula ventral tegmental area substantia nigra pars compacta reward system pain firing rate

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Transient cerebral ischemia induces long-term axonopathy:Its importance for the risk of Alzheimer's disease

Transient cerebral ischemia induces long-term axonopathy:Its...

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中国神经科学学会第九届全国学术会议暨第五次会员代表大会

作者： Paul J.LUCASSEN Swammerdam Institute for Life Sciences Center for NeuroscienceUniversity of AmsterdamAmsterdamthe Netherlands

Objective Cerebral ischemia may contribute to the pathogenesis of Alzheimer's disease(AD),however, the neuropathological relationship between these 2 disorders is largely *** investigated axonal changes after transient cerebral ischemia/reperfusion and their relationship to the expression of Aβ42 and hyperphosphorylated Tau, which has been considered as a key neuropathological process of *** Adult Wistar rats were subjected to either sham operation or middle cerebral artery occlusion(MCAO).At the desired time after the onset of reperfusion (6 h,24 h,1 w,2 w,3 w and 4 w),animals were carried out for in vivo tracing and sacrificed for tracer detection, immunochemistry and morphological analysis of axons,and immunoblotting test for hyperphosphorylated Tau was also *** Axonal changes,consisting of swollen axons and varicosities,were found 6 h after ischemia/reperfusion in ischemic regions,such as the sensory and motor cortex and striatum,as well as the perilesional cortex and hippocampus,and were observed for up to 4 *** did not observe Aβplaques or overexpression of Aβ42 in the ischemic brain areas;nevertheless,site-specific hyperphosphorylated Tau could be detected in the ischemic *** Transient cerebral ischemia/reperfusion induces long-term axonal changes(axonopathy), which may be an important mechanism contributing to the development of AD after stroke.

关键词： cerebral ischemia axonopathy stroke Alzheimer's disease

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Origin and molecular specification of oligodendrocytes in the spinal cord

Origin and molecular specification of oligodendrocytes in th...

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中国神经科学学会第九届全国学术会议暨第五次会员代表大会

作者： Meng-Sheng QIU College of Life and Environmental Sciences,Hangzhou Normal University,Hangzhou,China

Myelin is critical for the rapid conduction of action potentials in the vertebrate nervous *** oligodendrocyte is the cell type responsible for producing myelin and ensheathing axons in central nervous system (CNS).During early neural development,oligodendrocyte progenitor cells(OPCs) can be produced from a small number of neuroepithelial cells in both dorsal and ventral spinal cords,and both subpopulations of oligodendrocytes can contribute to axonal myelination during development and remyelination after *** of their embryonic origins,the development of OPCs appear to be regulated by the same set of regulatory *** Olig2 is essential for the initial specification of OPC cells,the terminal differentiation of OPCs is controlled by the Sox10 and Nkx2.2 transcription *** recent studies revealed a stage-dependent regulation of oligodendrocyte differentiation by Nkx2.2 homeodomain transcription *** myelination process is highly regulated by a number of extrinsic and intrinsic mechanisms during normal development of the oligodendrocyte *** several key factors have been identified to be critical for axonal myelination in the peripheral nervous system,the molecular control of CNS myelination has remained a *** this talk,I will present evidence that nectin-like cell adhesion molecules(Necl) and receptor molecules may participate in early CNS myelination and possibly in myelin regenerative process as well.

关键词： Origin and molecular specification of oligodendrocytes in the spinal cord

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