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Brain functional connectivity analysis during retention period in a visual working memory task

Brain functional connectivity analysis during retention peri...

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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： Ling LI Key Laboratory for Neurolnformation of Ministry of Education,School of Life Science and Technology,University of Electronic Science and Technology of China,Chengdu,610054,China

Objective Visual working memory(VWM) helps us store visual information to prepare for subsequent *** numerous studies have utilized behavioral accuracy and neural activity to estimate VWM capacity, little is known about the load-related changes in functional *** In this study,we recorded electroencephalography(EEG) from 14 normal young adults while they performed a bilateral visual field memory *** connectivity during the retention interval between 128 scalp regions was measured by EEG phase synchronization in the theta,alpha and beta frequency *** resulting matrices were converted to graphs,and the mean degree,clustering coefficient and path length was computed as a function of memory *** Our findings showed that the mean degree of a graph was dependent on the memory load in the theta,alpha and beta frequency ***,in the alpha band,a higher clustering coefficient and shorter path length was found with increasing memory ***,a significantly negative linear correlation between behavioral reaction time and path length was established in the alpha *** The results show that the neural activity and functional phase synchrony in the theta,alpha and beta frequency bands are memory load-dependent and behaviorally relevant during human VWM maintenance.

关键词： functional connectivity visual working memory ERP EEG

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Lmxlb involved mesocortical projection from mesencephalon to prefrontal cortex

Lmxlb involved mesocortical projection from mesencephalon to...

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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： Jin-Hao SUN~*,Zhen-Hua LI,Jing ZHANG,Hai-Man DONG,Xiao-Wen FENG,Peng LEI Institute of Anatomy and Histology & Embryology,School of Medicine,Shandong University,Jinan 250012,China

Objective Dopamine is a neurotransmitter that plays crucial role in the movement,reward and emotional *** containing dopamine are mainly clustered in *** dopaminergic(DA) neurons formed nigrostriatal,mesocortical and mesolimbic *** projection is closely associated with psychiatric ***,the molecular mechanisms which specify mesocortical projection,remain elusive. Recent studies showed that Lim homeobox transcription factor 1-beta(lmx1b) involved in the development of the *** To address the role of limlb in mesocortical projection,we injected retrograde fluorescent microspheres into the prefrontal cortex of neonatal mice and labeled mesocortical DA subtype ***, immunohistochemical staining was performed to examine the expression of lmxlb,and in situ hybridization was further performed to examine the signal of limx1b in *** Mesocortical neurons were labeled with injection fluorescent microspheres in prefrontal *** staining demonstrated that limxlb was expressed in labeled ***,Limxlb could be detected in *** This study showed that lmx1b involved mesocortical projection,which is significant for understanding the pathogenesis of psychiatric disorder.

关键词： limxlb dopaminergic projection mesencephalon

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Depletion of cathepsin B and cystatin C affects Aβ levels in transgenic mice over-expressing wild type hAPP

Depletion of cathepsin B and cystatin C affects Aβ levels i...

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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： Seo-Hyun CHO Gladstone Institute of Neurological Disease University of California

Objective Alzheimer's disease(AD) is the most common neurodegenerative *** amyloid B(AP) accumulation in the brain is one of the major factors which may result in AD.Aβaccumulation level in the brain was dependent on the balance between Aβproduction and *** showed previously that cathepsin B-cystatin C axis played key roles in Aβmetabolism of transgenic mice overexpressing hAPP with Swedish and Indiana ***,it is not clear if the cathepsin B-cystatin C axis could affect Apaccumulation in mice overexpressing wild type hAPP,which accounts for more AD cases compared with mutant *** the present study, we want to investigate the effects of cathepsin B and cystatin C deletion on Aβin mice with wild type *** Animals were obtained by crossing hAPPwt mice(line I63) with cathepsin B-/- or cystatin C-/-.ELISA and western blot analyses were used to measure Aβlevels and hAPP fragments,*** also used immunohistochemistry to detect pathology induced by ***(1) Cathepsin B or cystatin C ablation did not affect hAPP processing.(2) Cathepsin B or cystatin C ablation affected Abeta levels in mice with wild type *** Cathepsin B-cystatin C axis played key roles in Aβmetabolism of transgenic mice overexpressing mutant and wild type hAPP.

关键词： Alzheimer's disease Happ ELISA Western blot mouse

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Coupling asymmetry of electrical synapses is set by Ca2+ signals and mediates network-neurons' asynchrony in hypothalamic suprachiasmatic nucleus

Coupling asymmetry of electrical synapses is set by Ca2+ sig...

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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： Ming-Hui WANG,Shan CUI,Na CHEN~*,Jin-Hui WANG~* Institute of Biophysics,Chinese Academy of Sciences,Beijing 100101,China

Objective The electrical coupling among inhibitory neurons through gap junctions（i.e.,electrical synapses） presumably synchronizes their rhythmic oscillation and then coordinates principal neurons to encode brain *** revealing to the functional regulation of electrical synapses helps understand the programming of neuronal codes in brain plasticity and *** We investigated the dynamics and regulation of electrical synapses by pair-recording GABAergic cells in hypothalamic suprachiasmatic nucleus（SCN）.Results（1） The efficiency of electrical couplings between SCN neurons through gap junctions is *** asymmetric coupling through electrical synapses is present under various conditions and expresses plasticity.（2） The variances of intracellular Ca signals between these neurons influence their coupling asymmetry.（3） An attenuation of the coupling asymmetry in network neurons leads to their activity *** The asymmetry of electrical coupling among GABAergic cells may confer some of them to be dominant and make network neurons to be asynchronous in outputting electrical signals,such that temporal codes are more widely integrated into the brain programs.

关键词： gap junction neuron action potential suprachiasmatic nucleus

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RNAi targeting Stat3 expression inhibits growth of glioma in vitro and in vivo

RNAi targeting Stat3 expression inhibits growth of glioma in...

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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： Fu-Xue CHEN~*,Ya-Ming XU,Yong-Hua JI School of Life Sciences,Shanghai University,Shanghai 200444,China

Malignant gliomas are highly invasive tumors with high *** advances in the understanding of gliomas,the treatment of glioma still remains as a major challenge in ***3,as a member of signal transducer and activator of transcription family,plays a critical role in a variety of cancer cells and has been classified as an *** employed RNAi to investigate the biological function of Stat3 in *** data showed that Stat3 is constitutively expressed in human glioma cell line ***-regulation of Stat3 expression could inhibit proliferation,induce apoptosis and decrease invasion activity of human glioma cell line U251,meanwhile,it could suppress the expression of Bcl-xL,survivin and MMP-2 but not 67LR in *** data also showed that down-regulation of Stat3 could inhibit tumor growth and induce apoptosis of tumor cell in a xenograft mouse model. Furthermore,Stat3 RNAi could suppress the expression of Bcl-2 in *** results indicate that Stat3 plays an important role in the survival of glioma,and that targeting Stat3 may offer a potential therapeutic approach for glioma.

关键词： glioma Stat3 RNAi proliferation apoptosis invasion

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SCGIO promotes non-amyloidogenic processing of amyloid precursor protein by facilitating its anterograde trafficking

SCGIO promotes non-amyloidogenic processing of amyloid precu...

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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： Jing-Jing WANG,Wen-Yuan CAO,Jun-Lin TENG,Jian-Guo CHEN~* College of Life Sciences,Peking University,Beijing 100871,China

The processing of amyloid precursor protein(APP) is a key event in the pathogenesis of Alzheimer disease. Certain cleavage pathways tend to occur in particular subcellular compartments when APP travels *** a result,the processing of APP is greatly influenced by factors which regulate its *** we report that SCG10, a membrane-associated protein,directly interacts with the KFFEQ motif of APP intracellular domain(AICD) and promotes the non-amyloidogenic processing of *** of SCG10 leads to a reduction ofα-cleaved products, sAPPαandαCTF,and an increase of two Aβspecies,Aβ1-40 and Aβ***,elevated level of SCG10 results in the accumulation of APP in the post-Golgi vesicles and cell surface by facilitating anterograde trafficking of APP out of the Golgi *** addition,the ability of SCG10 to regulate APP processing is significantly compromised when the palmitoylation- mediated membrane-anchoring of SCG10 is *** together,these results suggest that SCG10,as a binding partner of APP,paly a critical role in the regulation of APP processing and may play a potential role in the prevention of Alzheimer disease.

关键词： APP AD sAPPa SCG10 trafficking

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Time to egg-laying:A new model of time-based memory in Drosophila

Time to egg-laying:A new model of time-based memory in Droso...

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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： Yijin WANG,Haiyun GONG,Zhefeng GONG,Li LIU~* State Key Lab.of Brain and Cognitive Science,Institute of Biophysics,Chinese Academy of Sciences,15 Da Tun Road, Chao Yang District,Beijing 100101,China

Light-dark cycles play a critical role of animal circadian rhythms that organize their behavior and physiology to adapt to daily *** formation of conditioning memory also regulates animal response to external *** date,very few studies on memory have considered time-based memory that was regulated by light-dark *** we describe a new model of time-based memory in *** this learning paradigm,light-dark cycle of egg-laying was associated with different food *** female flies reproduce more eggs during the time paired with yeast food,whereas they reproduce less eggs during the time paired with agar *** 9 cycles training, flies could maintain egg-laying memory at least 3 ***,we found that using agar food as punishment is more effective than using yeast as reward in egg-laying memory *** model would supply a new paradigm for the study of molecular and neural mechanism underlying the relationship between conditioning memory and circadian rhythms.

关键词： time-based memory circadian rhythms Drosophila

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The transcription factor Sp8 characterizes the configuration of the subventricular zone,rostral migratory stream and olfactory bulb in the adult rhesus monkeys

The transcription factor Sp8 characterizes the configuration...

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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： Rui CHEN,Zhen-Gang YANG~* Institutes of Brain Science and State Key Laboratory of Medical Neurobiology,Fudan University,Shanghai 200032, China

Neurogenesis in the primate subventricular zone(SVZ) of the lateral ventricle(LV) persisted throughout adulthood and the existence of rostral migratory stream(RMS) pathway in the adult primates has been intensely ***,the cellular organization and neurogenesis process in vertebrates,especially in monkeys remains *** the present study,we described the general configuration of the SVZ and RMS in adult monkeys via the expression of zinc finger transcription factor *** we detected the expression of Sp8 in the amphibians,reptiles, birds,rodents and *** of the neuroblasts in SVZ,RMS,olfactory tract and olfactory bulb are Sp8 ***,this transcription factor is highly expressed in the interneurons(CR,CB,TH and PV) of adult monkey olfactory *** with immunohistochemical detection of a marker for DNA replication(BrdU) and several cell type-specific markers,newly generated intemeurons are detected in the monkey olfactory *** together,our data suggest that Sp8 could be used as a marker to characterize neurogenesis of adult SVZ and RMS in rhesus monkeys.

关键词： Sp8 rhesus monkey neurogenesis neuroblasts subventricularzone rostral migratory stream olfactory bulb

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Genetics of neuronal sodium channels and epileptogenesis

Genetics of neuronal sodium channels and epileptogenesis

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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： Wei-Ping LIAO Institute of Neurosciences And The 2nd Affiliated Hospital of Guangzhou Medical College Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China,Guangzhou 510260,China

Recent studies have demonstrated that more than 80 genes are linked to monogenetic *** of these genes are related to ion ***1A remains to be the most relevant epilepsy gene so *** of the important features of the phenotypes of SCN1A mutations is the quantity-dependence,shown both experimentally in KO mouse and clinically in mosaic *** is thus suspected that the expression level of SCN1A may play a role the manifestation of *** promoter region and some non-coding exons of SCN1A have been identified *** is therefore possible to search genetic abnormalities in such regions in patients of epilepsy with febrile seizure plus（EFS+） but without mutations in coding exons.A variety of phenotypes and types of functional defect （funotypes） have been found in Na1.1 *** studies failed to correlate the funotypes with the phenotypes. Studies on the genotype-funotype-phenotype relationship will help us to understand the biological basis,and further in management,of *** will also be helpful in studying the normal physical functioning of the sodium channels.

关键词： SCN Genetics of neuronal sodium channels and epileptogenesis

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Gene expression profile of peripheral ganglion in diabetic and highfat high-sugar diet resistant rats

Gene expression profile of peripheral ganglion in diabetic a...

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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： Xiao-Li TANG,Li-Bin DENG,Fan-Jun KONG,Jia-Ri LIN,Shang-Dong LIANG~* Laboratory of Physiology,Medical college of Nanchang University,Nanchang 100038,China

Objective To screen and identify differentially expressed genes in peripheral ganglion in type 2 diabetic and high-fat high-sugar(HFHS) diet resistant *** We compared the differential gene expression in 2 groups using Illumina? Sentrix? BeadChip ***(1) 158 out of 12 604 genes were differentially expressed.(2) GO analysis showed 4 and 2 biological processes were significant in high expressed genes of diabetic and resistant rats,respectively.(3) KEGG analysis showed 6 and 1 pathways were significant in high expressed genes of diabetic and resistant rats,*** Muscle system process and response to biotic stimulus was involved in the process of diabetes and HFHS diet resistance.

关键词： type 2 diabetes mellitus peripheral ganglion gene expression Sprague Dawley rats

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