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Effects of adenosine agonist R-phenylisopropyl-adenosine on halothane anesthesia and antinociception in rats

Acta Pharmacologica Sinica 2005年第2期26卷 181-185页

作者： Hai-chun MA~(2,4),Yan-fen WANG~3,Chun-sheng FENG~2,Hua ZHAO~(4,5),Shuji DOHI~6~2department of Anesthesiology,the First Hospital of jilin university,changchun 130021,china ~3department of Digestive Disease,the SecondHospital of jilin university,changchun 130041,china ~4department of physiology,basic medical school,jilin university,changchun 130021,china ~6department of Anesthesiology,school of Medicine,Gifu university,Gifu 5008705,Japan department of Anesthesiology the First Hospital of Jilin University Changchun 130021 China

Aim:To investigate the antinociceptive effect of adenosine agonist R-phenylisopropyl-adenosine（R-PIA）given to conscious rats by intracerebro-ventricular（ICV）and intrathecal（IT）,and identify the effect of R-PIA on minimumalveolar concentration（MAC）of halothane with pretreatment of A1receptor an-tagonist 8-cyclopentyl-1,3-dipropylxanthine（DPCPX）or K+channel blocker4-aminopyridine（4-AP）.Methods:Sprague-Dawley rats were implanted with 24-gauge stainless steel guide cannula using stereotaxic apparatus and ICV method,and an IT catheter（PE-10,8.5cm）was inserted into the lumbar subarachnoidspace,while the rats were under pentobarbital *** one week ofrecovery from surgery,rats were randomly assigned to one of the followingprotocols:MAC of halothane,or tail-flick *** measurements were per-formed after R-PIA（0.8-2.0μg）microinjection into ICV and IT with or withoutpretreatment of DPCPX or ***:Microinjection of adenosine agonist R-PIA in doses of 0.8-2.0μg into ICV and IT produced a significant dose-and time-dependent antinociceptive action as reflected by increasing latency times andICV administration of adenosine agonist R-PIA（0.8μg）reducing halothane anes-thetic requirements（by 29%）.The antinociception and reducing halothane re-quirements effected by adenosine agonist R-PIA was abolished by DPCPX ***:ICV and IT administration of adenosine agonist R-PIA pro-duced an antinociceptive effect in a dose-dependent manner and decreased hal-othane MAC with painful stimulation through activation of A1receptor subtype,and the underlying mechanism involves K+channel activation.

关键词： adenosine inhalation anesthesia analgesia potassium channels subarachnoid space cerebral ventricles

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Cloning of the full-length gene of activin receptor-interacting protein2a and characterization of its interaction with ActR Ⅱ A

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Progress in Natural Science:Materials International 2007年第2期17卷 172-176页

作者： CUI Xueling, TAI Guixiang, ZHANG Hongjun, FANG Lin and LIU Zhonghui (school of basic medical Sciences, jilin university, changchun 130021, china) school of basic medical Sciences Jilin University Changchun 130021 China

To investigate the mechanism of intracellular signal transduction mediated by activin receptors, the full-length gene encoding a novel activin receptor-interacting protein2a (ARIP2a) was identified from a mouse brain cDNA library. The sequences of ARIP2a and ARIP2, distribution of ARIP2a and ARIP2 mRNA in mouse tissues, and expression of ARIP2a and ARIP2 in activin-induced RAW264.7 cell were compared, and the interaction between ARIP2a and ActRIIA was confirmed. The sequence analysis revealed that the full-length gene of ARIP2a, which composed of 1008 bp and encoded 153 amino acid residues, shared high sequence identity with ARIP2 except the position of the 99th amino acid. RT-PCR assay showed that ARIP2a mRNA was highly expressed in brain, pituitary and testis, and moderately in pancreas and ovary, but undetectable in other tissues. Whereas, ARIP2 mRNA was widely distributed in all mouse tissues that we tested. Moreover, expression of ARIP2a mRNA was significantly decreased in activin-stimulated RAW264. 7 cells; however, the expression of ARIP2 mRNA was increased. Additionally, the interaction between ARIP2a and activin type IIA receptor (ActRIIA) was further demonstrated by mammalian two-hybrid assays and pull-down assays. Taken together, those results indicate that although ARIP2a is homologous to ARIP2, they are different in tissue distribution and responses to activin. ARIP2a could also interact with activin type II receptor as a novel member of ARIP family.

关键词： activin receptor-interacting protein tissue distribution.

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Towards advanced zinc anodes by interfacial modification strategies for efficient aqueous zinc metal batteries

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Journal of Energy Chemistry 2024年第6期93卷 79-110,I0003页

作者： changchun Fan Weijia Meng Jiaye Ye Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology Ministry of EducationSchool of ChemistryBeihang UniversityBeijing 100191China Shaanxi Key Laboratory of New Transportation Energy and Automotive Energy Saving School of Energy and Electrical EngineeringChang’an UniversityXi’an 710061ShaanxiChina school of Chemistry and Physics Faculty of ScienceQueensland University of TechnologyBrisbaneQLD 4001Australia Centre for Materials Science Queensland University of TechnologyBrisbaneQLD 4001Australia

Developing sustainable and clean energy sources(e.g.,solar,wind,and tide energy)is essential to achieve the goal of carbon *** to the discontinuous and inco nsistent nature of common clean energy sources,high-performance energy storage technologies are a critical part of achieving this *** zinc metal batteries(AZMBs)with inherent safety,low cost,and competitive performance are regarded as one of the promising candidates for grid-scale energy ***,zinc metal anodes(ZMAs)with irreversible problems of dendrite growth,hydrogen evolution reaction,self-corrosio n,and other side reactions have seriously hindered the development and commercialization of *** increasing number of researchers are focusing on the stability of ZMAs,so assessing the effectiveness of existing research strategies is critical to the development of *** review aims to provide a comprehensive overview of the fundamentals and challenges of *** rch strategies for interfacial modification of ZMAs are systematically *** features of artificial interfacial coating and in-situ interfacial coating of ZMAs are compared and discussed in detail,as well as the effect of modified interfacial ZMA on the full-battery ***,perspectives are provided on the problems and challenges of *** review is expected to offer a constructive reference for the further development and commercialization of AZMBs.

关键词： Aqueous zinc metal batteries Zinc metal anode Interfacial modification Artificial interfacial coating In-situ interfacial coating

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Quantifying quantum entanglement via machine learning models

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Communications in Theoretical Physics 2024年第7期76卷 52-56页

作者： changchun Feng Lin Chen LMIB(Beihang university) Ministry of EducationBeijing 100191China school of Mathematical Sciences Beihang UniversityBeijing 100191China International Research Institute for Multidisciplinary Science Beihang UniversityBeijing 00191China

Quantifying entanglement measures for quantum states with unknown density matrices is a challenging *** learning offers a new perspective to address this *** training machine learning models using experimentally measurable data,we can predict the target entanglement *** this study,we compare various machine learning models and find that the linear regression and stack models perform better than *** investigate the model's impact on quantum states across different dimensions and find that higher-dimensional quantum states yield better ***,we investigate which measurable data has better predictive power for target entanglement *** correlation analysis and principal component analysis,we demonstrate that quantum moments exhibit a stronger correlation with coherent information among these data features.

关键词： quantum information entanglement predict machine learning coherence

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Finite-time composite learning control for nonlinear teleoperation systems under networked time-varying delays

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Science china(Information Sciences) 2024年第6期67卷 279-296页

作者： Yana YANG Huixin JIANG changchun HUA Junpeng LI Institute of Electrical Engineering Yanshan University

The robust finite-time synchronization control problem is investigated for master-slave networked nonlinear telerobotics systems(NNTSs) in this article. Although there have been some research achievements on finite-time control for the NNTSs, these studies are based on the strong assumptions of communication time delays or can only achieve finite-time bounded convergence even when the external forces are *** and in view of the importance of these issues, a novel robust composite learning adaptive control scheme rendering the finite-time master-slave synchronization is proposed in this paper. In particular, the influence of time delays on finite-time convergence of the system is analyzed by employing the multi-dimension finite-time small-gain framework. Meanwhile, in order to achieve accurate and fast estimation of uncertain parameters of the system, both the online historical and the instantaneous data of the estimation data are explored to derive the new parameter adaptive law under a more realizable interval-excitation(IE) ***, the convergence of the position/force synchronization errors and the adaptive parameter estimation errors is obtained in finite time, and enhanced robustness of the closed-loop system will also be ***, the superior performance of the proposed control algorithms is validated by numerical simulations and hardware experiments.

关键词： networked teleoperation systems finite-time control exact parameter estimation small-gain theorem unknown communication delays

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Surface electrocardiogram and action potential in mice lacking urea transporter UT-B

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Science china(Life Sciences) 2009年第5期52卷 474-478页

作者： MENG Yan1, ZHAO ChunYan2, ZHANG XueXin2, ZHAO HuaShan1, GUO LiRong1, Lü Bin1, ZHAO XueJian1& YANG BaoXue1,3 1 department of Pathophysiology, school of basic Medicine, jilin university, changchun 130021, china 2 department of physiology, school of basic Medicine, jilin university, changchun 130021, china 3 department of Medicine, university of California, San Francisco CA 94143, USA department of Pathophysiology School of Basic Medicine Jilin University Changchun 130021 China department of physiology School of Basic Medicine Jilin University Changchun 130021 China department of Medicine University of California San Francisco CA 94143 USA

UT-B is a urea transporter protein expressed in the kidney and in many non-renal tissues including erythrocytes, brain, heart, bladder and the testis. The objective of this study was to determine the phenotype of UT-B deletion in the heart. UT-B expression in the heart was studied in wild-type mice vs UT-B null mice by utilizing RT-PCR and Western blot. A surface electrocardiogram (ECG) recording (lead II) was measured in wild-type mice and UT-B null mice at the ages of 6, 16 and 52 weeks. For the action potential recording, the ventricular myocytes of 16 w mice were isolated and recorded by floating microelectrode method. The sodium current was recorded by the patch clamp technique. RT-PCR and Western blot showed the UT-B expression in the heart of wild-type mice. No UT-B transcript and protein was found in UT-B null mice. The ECG recording showed that the P-R interval was significantly prolonged in UT-B null mice ((43.5 ± 4.2), (45.5 ± 6.9) and (43.8 ± 7.6) ms at ages of 6, 16 and 52 weeks) vs wild-type mice ((38.6 ± 2.9), (38.7 ± 5.6) and (38.2 ± 7.3) ms, P4) mV/s) vs those in wild-type mice (vs (110.51 ± 10.38) and (109.53 ± 10.64) mV/s, P43 ± 16.41) ms) vs that in wild-type mice ((108.27 ± 10.85) and (171.00 ± 15.53) ms, P<0.05). The maximal sodium current decreased significantly in UT-B null mice (-8.80 ± 0.92) nA vs that in wild-type mice ((-5.98 ± 1.07) nA, P<0.05). These results provide the first evidence that UT-B deletion causes progressive heart block in mice.

关键词： urea transporter heart block electrocardiogram

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Expression of ATP synthase 6 in breast cancer cell line, T47D cells, induced by heregulin β1

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吉林大学学报（医学版） 2002年第2期28卷 111-114页

作者： SUN Yan bo,YANG Gui zhen (Dept.of Immunology, school of basic medical Sciences,jilin university ,changchun 130021 china) Dept. of Immunology School of Basic Medical Sciences Jilin University Changchun 130021

目的 :探讨 Heregulinβ1诱导乳腺癌细胞 T47D相关基因的表达。方法 :应用差减杂交和斑点杂交技术检测乳腺癌细胞在 Heregulinβ1 ( 30 μg· L-1)作用 1 8h后 ,相关基因的表达情况。结果 :线粒体 ATP合成酶 6m RNA的表达在 1～ 6h明显... 详细信息

目的 :探讨 Heregulinβ1诱导乳腺癌细胞 T47D相关基因的表达。方法 :应用差减杂交和斑点杂交技术检测乳腺癌细胞在 Heregulinβ1 ( 30 μg· L-1)作用 1 8h后 ,相关基因的表达情况。结果 :线粒体 ATP合成酶 6m RNA的表达在 1～ 6h明显增高。结论 :乳腺癌细胞 T47D在 Here-gulinβ1刺激后 ,细胞 ATP酶

关键词：乳腺癌 T47D 基因表达线粒体 ATP

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NUMERICAL COMPUTATION OF BOUNDED SOLUTIONS FORA SEMILINEAR ELLIPTIC EQUATION ON AN INFINITE STRIP

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Journal of Computational Mathematics 1999年第2期17卷 159-170页

作者： Fu-ming Ma(department of Mathematics, jilin ’university, changchun 130023, china) 吉林大学数学系吉林长春

In this paper, we consider the computation of bounded solutions of a semilinear elliptic equation on an infinite strip. The dynamical system approach and reduction on center manifold are used to overcome the difficult... 详细信息

关键词： numerical method nonlinear PDE center manifold

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Endothelin-1 induces intracellular [Ca^(2+)] increase via Ca^(2+) influx through the L-type Ca^(2+) channel, Ca^(2+)-induced Ca^(2+) release and a pathway involving ET_A receptors, PKC, PKA and AT1 receptors in cardiomyocytes

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Science china(Life Sciences) 2009年第4期52卷 360-370页

作者： ZENG QingHua1, LI XingTing1, ZHONG GuoGan2, ZHANG WenJie2 & SUN ChengWen3 1 Laboratory of Molecular & Cellular physiology, school of Life Sciences, Northeast Normal university, changchun 130024, china 2 department of physiology, school of basic medical Sciences, jilin university, changchun 130021, china 3 department of Pharmaceutical Sciences, North Dakota State university, Fargo, NorthDakota, USA Laboratory of Molecular & Cellular physiology School of Life Sciences Northeast Normal University Changchun 130024 China department of physiology School of Basic Medical Sciences Jilin University Changchun 130021 China department of Pharmaceutical Sciences North Dakota State University Fargo NorthDakota USA

Using fura-2-acetoxymethyl ester (AM) fluorescence imaging and patch clamp techniques, we found that endothelin-1 (ET-1) significantly elevated the intracellular calcium level ([Ca2+]i) in a dose-dependent manner and activated the L-type Ca2+ channel in cardiomyocytes isolated from rats. The effect of ET-1 on [Ca2+]i elevation was abolished in the presence of the ETA receptor blocker BQ123, but was not affected by the ETB receptor blocker BQ788. ET-1-induced an increase in [Ca2+]i, which was inhibited 46.7% by pretreatment with a high concentration of ryanodine (10 μmol/L), a blocker of the ryanodine receptor. The ET-1-induced [Ca2+]i increase was also inhibited by the inhibitors of protein kinase A (PKA), protein kinase C (PKC) and angiotensin type 1 receptor (AT1 receptor). We found that ET-1 induced an enhancement of the amplitude of the whole cell L-type Ca2+ channel current and an increase of open-state probability (NPo) of an L-type single Ca2+ channel. BQ123 completely blocked the ET-1-induced increase in calcium channel open-state probability. In this study we demonstrated that ET-1 regulates calcium overload through a series of mechanisms that include L-type Ca2+ channel activation and Ca2+-induced Ca2+ release (CICR). ETA receptors, PKC, PKA and AT1 receptors may also contribute to this pathway.

关键词： endothelin-1(ET-1) cardiomyocytes intracellular calcium concentration ([Ca2+]i) L-type Ca2+ channel current (ICaL) Ca2+-induced Ca2+ release (CICR) ETA receptors PKC PKA AT1 receptors

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Taurine Inhibits Myocardial Fibrosis via PKC-ERK1/2 Signaling Pathways

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Chemical Research in Chinese Universities 2012年第1期28卷 84-90页

作者： WANG Li-ying1,2, LI Hong1 and YANG Shi-jie1 1. department of Pharmacology, Norman Bethune College of Medicine, jilin university, changchun 130021, P. R. china 2. department of physiology, basic Medicine College, Beihua university, jilin 132013, P. R. china jilin Univ Norman Bethune Coll Med Dept Pharmacol Changchun 130021 Peoples R China Beihua Univ Basic Med Coll Dept Physiol Jilin 132013 Jilin Peoples R China

Previous studies have demonstrated the important role of taurine in inhibiting proliferation of myofibrob lasts（myoFb） and myocardial fibrosis. However, the underlying mechanisms are unclear. The present study was de signed to shed light on this issue through exploring the signal pathways via in vitro experiments. Angiotension II （AngII） treatment significantly increased myoFb proliferation and the levels of collagens I and III（P〈0.05）, whereas taurine, PKCα（PKC： protein kinase C） specific inhibitor L-threo-dihydro-sphingosine（D4681）, ERK1/2 inhibitor （PD98095） abrogated myoFb proliferation and collagen levels（P〈0.05, P〈0.01, respectively）, and increased the G0/G1 phase rate and decreased S phase rate. Immunocytochemistry, confocal fluorescence staining and image analy sis showed that taurine could inhibit the translocation and expression of p-PKCαin membrane, and then inhibit nuc lear translocation and expression of p-ERK1/2. These results have statistically significant differences compared with those of AngII group（P〈0.01）. Western blot results also show that taurine could inhibit the protein expression of p-PKCα and p-ERK1/2. We used p-PKCα specific inhibitor D4681 in order to elucidate the relationship between p-PKCα and p-ERK1/2 in signal transduction pathways. Finally, the results show that the protein expression of p-ERK1/2 and nuclear translocation were suppressed in D4681 group.

关键词： Taurine Myocardial fibrosis Proliferation Signal transduction Cardiac remodeling

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