检索结果-南通市图书馆

Opioid receptor antagonists increase [Ca2+]i in rat arterial smooth muscle cells in hemorrhagic shock

Acta Pharmacologica Sinica 2004年第3期25卷 141-146页

作者： Li KAI,Zhong-feng WANG2,Yu-liang SHI2,3,Liang-ming LIU,De-yao HU Institute of Surgery,Department of Pharmacology,Third Military Medical University,Chongqing 400042 key laboratory of 2 neurobiology,shanghai institutes for biological sciences,chinese academy of sciences,shanghai 200031,china Institute of Surgery Department of Pharmacology Third Military Medical University 重庆 400042 中科院上海生命科学院 Key Laboratory of Neurobiology CAS 上海 200031

AIM: To examine the effects of opioid receptor antagonists and norepinephrine on intracellular free Ca2+ concentra- tion ([Ca2+]i) in mesenteric arterial (MA) smooth muscle cells (SMC) isolated from normal and hemorrhagic shocked rats in the vascular hyporesponse stage. METHODS: The rat model of hemorrhagic shock was made by withdrawing blood to decrease the artery mean blood pressure to 3.73-4.26 kPa and keeping at the level for 3 h. [Ca2+]i of vascular smooth muscle cells (VSMC) were detected by the laser scan confocal microscopy. RESULTS: In the hyporesponse VMSC of rats in hemorrhagic shock, selective δ-, κ-, and μ-opioid receptor antagonists (naltrindole, nor-binaltorphimine, and β-funaltrexamine, 100 nmol/L) as well as norepinephrine 5 μmol/L significantly increased [Ca2+]i by 47 %±13 %, 37 %±14 %, 33 %±10 %, and 54 %±17 %, respectively, although their effects were lower than those in the normal rat cells (the increased values were 148 %±54 %, 130 %±44 %, 63 %±17 % and 110 %±38 %, respectively); and the norepinephrine-induced increase in [Ca2+]i was further augmented by three δ-, κ-, and μ-opioid receptor antagonists (50 nmol/L, respectively) application (from 52 %±16 % to 99 %±29 %, 146 %±54 % and 137 %±47 %, respectively). CONCLUSION: The disorder of [Ca2+]i regulation induced by hemorrhagic shock was mediated by opioid receptor and α-adrenoceptor, which may be partly responsible for the vascular hyporesponse, and the opioid receptor antagonists improved the response of resistance arteries to vascu- lar stimulants in decompensatory stage of hemorrhagic shock.

关键词： hemorrhagic shock vascular smooth muscle opioid receptors calcium

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Cure of experimental botulism and antibotulismic effect of toosendanin

引用

Acta Pharmacologica Sinica 2004年第6期25卷 137-146页

作者： Yu-liang SHI2, Zhong-feng WANG key laboratory of neurobiology, shanghai institutes for biological sciences, chinese academy ofScience, shanghai200031, china 中科院上海生命科学院 Key laboratory of Neurobiology CAS 上海 200031

Botulinum neurotoxins (BoNTs), a group of bacterial proteins that comprise a light chain disulfide linked a heavy chain, are the most lethal biotoxins known to mankind. By inhibiting neurotransmitter release, BoNTs cause severe neuroparalytic disease, botulism. A series of important findings in the past 10 years which displayed the molecular targets of BoNTs and hence proposed a four-step action mechanism to explain BoNT intoxication greatly advanced the study of antibotulismic drug. In this article, we reviewed these progresses and anti-botulismic compounds found in recent years. These compounds function due to their facilitation on neurotransmitter release or to their interference on the binding, internalization, translocation, and endopeptidase activity of the toxins. Toosendanin is a triterpenoid derivative extracted from a digestive tract-parasiticide in chinese traditional medicine. chinese scientists have found that the compound is a selective prejunctional blocker. In spite of sharing some similar action with BoNT, toosendanin can protect botulism animals that have been administrated with lethal doses of BoNT/A or BoNT/B for several hours from death and make them restore normal activity. The neuromuscular junction preparations isolated from the rats that have been injected with toosendanin tolerate BoNT/A challenge. Toosendanin seems to have no effect on endopeptidase activity of BoNT, but blocks the toxin approach to its enzymatic substrate.

关键词： toosendanin botulinum toxins botulism synaptic transmission neurotransmitter triterpene chinese traditional medicine

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

A patch-clamp study on human sperm Cl^- channel reassembled into giant liposome

引用

Asian Journal of Andrology 2001年第3期3卷 185-191页

作者： Jun-Ping BAI Yu-Liang SHI key laboratory of neurobiology,Intitute of Physiology,shanghai institutes for biological sciences,chinese academy of Science, shanghai 200031,china key laboratory of neurobiology Institute of Physiology Chinese Academy of Sciences Shanghai.

Aim: To record the single-channel currents and characterize the electrophysiological properties of the Cl^- channels inhuman sperm membrane. Methods: The membrane proteins extracted from the human sperm were reassembled intoliposome bilayer, and the liposomes were fused into giant liposomes with a diameter more than 10μm by dehydration-rehydration procedure. The giant liposomes were used to study the Cl^- channel activities by patch-clamp ***: By patch clamping the giant liposome in an asymmetric NMDG (N-methyl-D-glucamine)-Cl (bath 100//pipette 200 mmol/L) solution system, three kinds of single-channel events with unit conductances of (74.1 ± 8.3) pS,(117.0±5.7) pS and (144.7±4.5) pS, respectively, were detected. Their activities were voltage-dependent and allwere blocked by SITS (4-acetamido-4'-isothiocyanato-stilbene-2', 2'-disulfonic acid) in a concentration-dependentmanner. By constructing the open and close dwell time distribution histograms and then fitting them with exponentialfunction, two time constants were obtained in both the open and the close states. The burst activity and conductancesubstate of the channels were observed. Conclusion; There exist three kinds of Cl^- channels with different conduc-tance in human sperm membrane at least. (Asian J Androl 2001 Sep; 3: 185 - 191)

关键词： Cl^-channel giant liposome patch clamp human sperm membrane ion channel reassembly

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Synapse formation and remodeling

引用

Science china(Life sciences) 2010年第3期53卷 315-321页

作者： LUO ZhenGe Institute of Neuroscience and State key laboratory of Neuroscience,shanghai institutes for biological sciences,chinese academy of sciences,shanghai 200031,china Institute of Neuroscience and State key laboratory of Neuroscience Shanghai Institutes for Biological Sciences Chinese Academy of Sciences

Synapses are specialized structures that mediate information flow between neurons and target cells,and thus are the basis for neuronal system to execute various functions,including learning and *** are around 1011 neurons in the human brain,with each neuron receiving thousands of synaptic inputs,either excitatory or inhibitory.A synapse is an asymmetric structure that is composed of pre-synaptic axon terminals,synaptic cleft,and postsynaptic *** formation involves a number of cell adhesion molecules,extracellular factors,and intracellular signaling or structural *** the establishment of synaptic connections,synapses undergo structural or functional changes,known as synaptic plasticity which is believed to be regulated by neuronal activity and a variety of secreted *** review summarizes recent progress in the field of synapse development,with particular emphasis on the work carried out in china during the past 10 years(1999-2009).

关键词： synapse development neuronal activity synaptic plasticity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Progress in glial cell studies in some laboratories in china

引用

Science china(Life sciences) 2010年第3期53卷 330-337页

作者： DUAN ShuMin Institute of Neuroscience,State key laboratory of Neuroscience,shanghai institutes for biological sciences,chinese academy of sciences,shanghai china,200031 Institute of Neuroscience State Key Laboratory of Neuroscience Shanghai Institutes for Biological Sciences Chinese Academy of Sciences

Glial cells in the central nervous system(CNS) consist of a heterogeneous population of cell types,each characterized by distinct morphological features,physiological properties,and specific *** contrast to the previous view that glial cells were passive elements in the brain,accumulating evidence suggests that glial cells are active participants in various brain functions and brain *** review summarizes recent progress of glial cell studies from several groups in china,ranging from studies about the mechanisms of neuron-glia crosstalking to investigations on the roles of glial cells in various CNS disorders.

关键词： neuron-glia interaction ATP plasticity pain ischemia neural injury and repair

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Pain research in china

引用

Science china(Life sciences) 2010年第3期53卷 356-362页

作者： ZHANG Xu Institute of Neuroscience,State key laboratory of Neuroscience,shanghai institutes for biological sciences,chinese academy of sciences,shanghai 200031,china Institute of Neuroscience State Key Laboratory of Neuroscience Shanghai Institutes for Biological Sciences Chinese Academy of Sciences

In addition to investigating the anatomy,neurochemistry and neurophysiology of pain pathways,chinese researchers have extended their work into the molecular and cellular mechanisms of sensory afferent transmission at the spinal cord level as well as cognitive processing in the *** mechanism underlying acupuncture analgesia remains a subject of special interest for chinese pain researchers,with the aim of combining clinical practice with the understanding of pain transmission and analgesic mechanism.

关键词： dorsal root ganglion spinal cord nociception receptors ion channels gene expression

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Cloning and Analyzing of Xenopus Mespo Promoter in Retinoic Acid Regulated Mespo Expression

引用

Acta Biochimica et Biophysica Sinica 2006年第11期38卷 759-764页

作者： Jin-Hu WANG Xiao-Yan DING* Institute of Biochemistry and Cell Biology,shanghai institutes for biological sciences,chinese academy of sciences,Graduate School of the chinese academy of sciences,shanghai 200031,china Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Graduate School of the Chinese Academy of SciencesShanghai 200031 China

During vertebrate embryogenesis,presomitic mesoderm cells enter a segmental program togenerate somite,a process termed ***,a member of the bHLH transcription factor family,plays important roles in this ***,how Mespo expression is regulated remains *** this question,we isolated a genomic DNA sequence containing 4317 bp of Mespo 5’ flanking regionin *** assays show that this upstream sequence has transcription *** assayshows that this genomic contig is sufficient to recapitulate the dynamic stage-and tissue-specific expressionpattern of endogenous Mespo from the gastrula to the tailbud *** further mapped a 326 bp DNAsequence responding to retinoic acid *** results shed light on how Mespo expression is regulated,and suggest that retinoic acid signaling pathways play roles in somitogenesis through regulating Mespo.

关键词： bHLH paraxial presomitic segmental tailbud Xenopus laevis

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Ion channels in neuronal survival

引用

Science china(Life sciences) 2010年第3期53卷 342-347页

作者： WANG YiZheng & XU TianLe Institute of Neuroscience and State key laboratory of Neuroscience,shanghai institutes for biological sciences,chinese academy of sciences,shanghai 200031,china Institute of Neuroscience and State key laboratory of Neuroscience Shanghai Institutes for Biological Sciences Chinese Academy of Sciences

The study of ion channels represents one of the most active fields in neuroscience research in *** the last 10 years,active research in various chinese neuroscience institutions has sought to understand the mechanisms responsible for sensory processing,neural development and neurogenesis,neural plasticity,as well as *** addition,extensive studies have been directed to measure ion channel activity,structure-function relationships,as well as many other biophysical and biochemical *** review focuses on the progress achieved in the investigation of ion channels in neuronal survival during the past 10 years in china.

关键词： ion channels neuronal survival and ischemia.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Functional Analysis of Multiple Transcription Factor Sites in a Regulatory Element of Human ε-Globin Gene

引用

Acta Biochimica et Biophysica Sinica 2004年第10期36卷 673-680页

作者： Chun-Hui HOU, Jian HUANG, and Ruo-Lan QIAN* State key laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, shanghai institutes for biological sciences, chinese academy of sciences, Graduate School of the chinese academy of sciences, shanghai 200031, china State key laboratory of Molecular Biology Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Graduate School of the Chinese Academy of SciencesShanghai 200031 China

The developmental control of the human ε-globin gene expression is mediated by transcrip- tional regulatory elements in the 5’ flanking DNA of this gene. A previously identified negative regulatory element (–3028 to –2902 bp, termed ε-NRAII) was analyzed and one putative NF-κB site and two GATA sites locate at –3004 bp, –2975 bp and –2948 bp were characterized. Electrophoresis mobility shift assay (EMSA) showed that the putative NF-κB site was specifically bound by nuclear proteins of K562 cells. Data obtained from transient transfection showed that the expression of reporter gene could be upregulated about 50% or 100% respectively when ε-NRAII was inserted upstream of the SV40 promoter or ε-globin gene proximal promoter (–177 bp to +1 bp), suggesting that ε-NRAII might not be a classic silencer. Mutation in the putative NF-κB site or in the GATA site (at –2975 bp) slightly reduced the expression of reporter gene driven by SV40 promoter or ε-globin gene proximal promoter. However, the mutation of GATA site at –2948 bp remarkably reduced the reporter gene activity driven by SV40 promoter, but not by ε-globin gene proximal promoter. Further mutation analysis showed that the negative effect of mutation in GATA site at –2948 bp on SV40 promoter was not affected by the mutation of the putative NF-κB site, whereas it could be abolished by the mutation of GATA site at –2975 bp. Furthermore, the mutation of both GATA sites could synergistically reduce the reporter gene activity driven by ε-globin gene proximal promoter. Those results suggested that ε- NRAII might function differently on the SV40 promoter and ε-globin gene proximal promoter.

关键词： ε-globin gene regulatory element NF-κB GATA

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Functional analysis of schistosomes EF-hand domain-containing tegument proteins

引用

chinese Science Bulletin 2007年第15期52卷 2100-2107页

作者： YU FuDong1,2,3,KANG Bin1,3,LI YuanYuan3,4 & LI YiXue1,3 1 Bioinformatics Center,key laboratory of Systems Biology,shanghai institutes for biological sciences,chinese academy of Sci-ences,shanghai 200031,china 2 Graduate University of chinese academy of sciences,shanghai 200031,china 3 shanghai Center for Bioinformation Technology,shanghai 200235,china 4 key laboratory of Systems Biology,shanghai institutes for biological sciences,chinese academy of sciences,shanghai 200031,china Bioinformatics Center Key Laboratory of Systems Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai China Graduate University of chinese academy of sciences Shanghai China shanghai Center for Bioinformation Technology Shanghai China key laboratory of Systems Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai China

Schistosomes cause schistosomiasis disease which severely threatens human health. Little is known about the functions of EF-hand domain containing schistosomes tegument proteins other than as an-tigens. More possible functions of these tegument proteins were investigated with in silico analyses including protein-protein functional interaction,site-specific variation and glycosylation modification. The analysis results suggested that schistosomes could actively modulate host immune responses for its own favor through functional interactions with host proteins with immunomodulatory function,and passively regulate host immune responses through sequence variation under positive selection and glycosylating the recognition sites of host immune attack. In addition,the analysis of the C-terminal domain of these tegument proteins indicated that they could assist schistosomes in escaping host immune attacks through inhibiting chemotaxis and non-complement fixing antibody (IgG4) responses. In summary,our results suggested that these tegument antigen proteins could assist schistosomes in escaping and modulating host immune responses for self-protection during the process of host-para-site interaction.

关键词：寄生虫血吸虫皮蛋白质健康

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：