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Influence of rotating magnetic field on cerebral infarction volume, cerebral edema and free radicals metabolism after cerebral ischemia/reperfusion injury in rats

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Neural Regeneration Research 2006年第9期1卷 777-780页

作者： Xiaohong Liu1, Zhiqiang Zhang2, Lixin Zhang3 1liaoning Disabled Children’s rehabilitation Center, shenyang 110015, liaoning province, china 2department of rehabilitation, Second hospital affiliated to china medical university, shenyang 110003, liaoning province, china 3department of rehabilitation and physiotherapy, first hospital affiliated to china medical university, shenyang 110001, liaoning province, china liaoning Disabled Children's rehabilitation Center Shenyang 110015 Liaoning Province China department of rehabilitation China Medical University Shenyang 110003 Liaoning Province China department of rehabilitation and physiotherapy China Medical University Shenyang 110001 Liaoning Province China

BACKGROUND: It has shown that magnetic field can improve blood circulation, decrease blood viscosity, inhibit free radicals, affect Ca2+ flow in nerve cells, control inflammatory and immunological reaction, and accelerate nerve cell regeneration. In addition, protective effect of magnetic field, which acts as an iatrophysics, on ischemic brain tissues has been understood gradually. OBJECTIVE: To investigate the effects of rotating magnetic field (RMF) on volume of cerebral infarction, cerebral edema and metabolism of free radicals in rats after cerebral ischemia/reperfusion injury. DESIGN: Randomized controlled animal study. SETTING: rehabilitation Center of disabled children, Liaoniang; department of rehabilitation, the Second affiliated hospital, china medical university; department of rehabilitation physiotherapy, the first affiliated hospital, china medical university. MATERIALS: A total of 70 healthy Wistar rats aged 18-20 weeks of both genders were selected and randomly divided into 3 groups: sham operation group with 12 rats, control group with 20 rats and treatment group with 38 rats. The treatment group included 4 time points: immediate reperfusion with 6 ones, 6-hour reperfusion with 20 ones, 12-hour reperfusion with 6 ones and 18-hour reperfusion with 6 rats. Main instruments were detailed as follows: magnetic head of rotating magnetic device was 6 cm in diameter; magnetic induction intensity at the surface of magnetic head was 0.25 T in silence; the maximal magnetic induction intensity was 0.09 T at the phase of rotation; the average rotating speed was 2500 r per minute. METHODS: The experiment was carried out in the china medical university in March 2003. Focal cerebral ischemic animal models were established with modified Longa’s method. Operation was the same in the sham operation, but the thread was inserted as 10 mm. Neurologic impairment was assessed with 5-rating method to screen out cases. Those survivals with grade 1 and grade 2 after ischemia f

关键词： cerebral edema and free radicals metabolism after cerebral ischemia/reperfusion injury in rats free

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Cyclooxygenase-2 polymorphisms and susceptibility to gastric carcinoma: A meta-analysis

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World Journal of Gastroenterology 2010年第43期16卷 5510-5517页

作者： Jia-Li Liu, Zhen-Ning Wang, department of Surgical Oncology and General Surgery, the first affiliated hospital of china medical university, shenyang 110001, liaoning province, china Yuan Liang, department of Oncology, the Shengjing affiliated hospital of china medical university, shenyang 110001, liaoning province, china Xin Zhou, department of Obstetrics and Gynecology, the Shengjing affiliated hospital of china medical university, shenyang 110001, liaoning province, china Li-Li Xing, department of Oncology, the Fourth affiliated hospital of china medical university, shenyang 110032, liaoning province, china department of Surgical Oncology and General Surgery the First Affiliated Hospital of China Medical University Shenyang 110001 Liaoning Province China.

AIM: To investigate the association of the cyclooxygenases-2 (COX-2) polymorphisms and susceptibility to gastric cancer (GC) by means of meta-analysis. METHODS: Publications addressing the association between polymorphisms of COX-2 and susceptibility to GC were selected from the MEDLINE, EMBASE and CBMdisc databases. Data was extracted from the studies by 2 independent reviewers. The meta-analyses were performed by RevMan 5.0.23. From these data, odds ratio (OR) with 95% confidence interval (CI) was ***: Ten studies were retrieved reporting a total of 11 COX-2 polymorphisms. Carriers of -765C, -1195A, -1290G, *2430T alleles and *429TT genotype revealed increased risk for GC (OR = 1.71, 95% CI: 1.01-2.90, P = 0.05; OR = 1.58, 95% CI: 1.05-2.38, P = 0.03; OR = 1.55, 95% CI: 1.01-2.39, P = 0.05; OR = 2.62, 95% CI: 1.20-5.73, P = 0.02 and OR = 0.74, 95% CI: 0.59-0.95, P = 0.02, respectively). CONCLUSION: The -765C, -1195A, -1290G, *2430T alleles and *429TT genotype of COX-2 polymorphisms were determined a significant association with susceptibility to GC.

关键词： Cyclooxygenases-2 Gastric cancer Polymorphisms Susceptibility Meta-analysis

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Identification of Nuclear Factor-κB Responsive Element within the Neuronal Nitric Oxide Synthase Exon If-specific Promoter

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Acta Biochimica et Biophysica Sinica 2007年第4期39卷 247-254页

作者： Yinghui LI~1 Guangyu LI~2 Chunyi LI~1 Yanyan ZHAO~1* 1 department of medical Genetics,china medical university,shenyang 110001 china 2 department of Neurosurgery,first affiliated hospital,china medical university,shenyang 110001,china department of medical Genetics China Medical UniversityShenyang 110001 China department of Neurosurgery First Affiliated Hospital China Medical UniversityShenyang 110001 China

Transcriptional regulation of the neuronal nitric oxide synthase gene(nNOS)is particularlycomplex as 12 distinct transcripts derived from different first exons are expressed in a tissue- and cell-specific *** exon 1f mRNA is relatively highly expressed in nervous system and relies upon exon1f-specific promoter *** conventional and real-time reverse transcription-polymerase chain reaction,we found exon 1f mRNA was the major transcript of the nNOS gene in human neuroblastoma *** analyzed a 1090 bp fragment of 1f promoter by TRANSFAC-TESS and Match softwares andluciferase assay,and found an important positive transcriptional regulation region that contained a putativenuclear factor(NF)-κB binding ***,using electrophoresis mobility shift and chromatinimmunoprecipitation assays,we identified this site to be the NF-κB responsive element,a crucial positiveregulator in the activation of the nNOS 1f *** together,our study identified an NF-κB responsiveelement within nNOS 1f promoter and showed that it plays an important role in the transactivation of nNOS1f mRNA,the major transcript of nNOS in SK-N-SH cells.

关键词： nNOS NF-kB transactivation nervous system

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Corticosteroids or non-corticosteroids: a fresh perspective on alcoholic hepatitis treatment

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Hepatobiliary & Pancreatic Diseases International 2011年第5期10卷 458-464页

作者： Fei Wang and Bing-Yuan Wang department of Gastroenterology, first affiliated hospital, china medical university, shenyang 110001, china department of Gastroenterology First Affiliated Hospital China Medical University Shenyang 110001 China

BACKGROUND: Alcoholic hepatitis (AH) is a necrotizing inflammatory process caused by alcoholic liver injury. It carries a significant short-term mortality. The management of AH is challenging. Although corticosteroids have been demonstrated to exert anti-inflammatory and antifibrotic effects, their efficacy for the treatment of AH remains debatable. DATA SOURCES: A literature search was performed of MEDLINE, ScienceDirect, SpringerLink and Wiley InterScience using the key words 'alcoholic hepatitis', 'alcoholic liver disease', and 'corticosteroids'. The available data reported in the relevant literature were analyzed. RESULTS: More than 17 controlled trials and at least 13 meta-analyses have reported the efficacy of corticosteroids in the treatment of AH in the past 40 years. Many were poorly designed and used different inclusion/exclusion criteria, making it difficult to reach a consensus. In this review, we summarized all the controversial data in the past decade and analyzed the potential causes for the varying therapeutic effects of corticosteroids in AH. The focus of the controversy has changed from 'whether steroids are beneficial or harmful for AH patients' to 'how to accurately identify responders to steroids early and rationalize corticosteroid treatment'. An early response to glucocorticoids, as determined by calculating the Lille score after 7 days of treatment, has been shown to be a clinically useful indicator. Moreover, down-regulation of steroid sensitivity, risk of infection, and a rational therapeutic strategy of corticosteroids in AH patients are all crucial for therapeutic ***: An early and accurate determination of steroid sensitivity is important. Besides, we need to overcome the down-regulation of steroid sensitivity, reduce the infection risk and rationalize the therapeutic strategy of corticosteroids. A fresh perspective is needed on the use of corticosteroids in AH patients.

关键词： corticosteroids alcoholic liver disease alcoholic hepatitis steroid sensitivity scoring system

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Quantitative analysis of the ribbon synapse number of cochlear inner hair cells in C57BL/6J mice using the three-dimensional modeling method

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Science china(Life Sciences) 2009年第9期52卷 807-812页

作者： LIU Ke,LI ShuNa & JIANG XueJun department of Otolaryngology,the first affiliated hospital,china medical university,shenyang 110001,china department of Otolaryngology the First Affiliated Hospital China Medical University Shenyang China

In mammals,the ribbon synapses of cochlear inner hair cells are a synaptic structure of the first sensory nerve in the pathway of acoustical signal transmission to the acoustic center,and it is directly involved in voice coding and neurotransmitter release. It is difficult to quantitatively analyze the ribbon synaptic number only using an electron microscope,because the ribbon synaptic number is relatively limited and their location is deep. In this study,the specific presynaptic structure-RIBEYE,and non-specific postsynaptic structure-GluR 2 & 3 in C57BL/6J mouse basilar membrane samples were treated by immunofluorescent labeling. Serial section was performed on the samples using a laser scanning confocal microscope,and then the serial sections were used to build three-dimensional models using 3DS MAX software. Each fluorescein color pair indicates one synapse,so the number of ribbon synapses of inner hair cells is obtained. The spatial distribution and the number of ribbon synapses of cochlear inner hair cells were clearly shown in this experiment,and the mean number of ribbon synapses per inner hair cell was 16.10±1.03. Our results have demonstrated the number of ribbon synapses is accurately calculated by double immunofluorescent labeling to presynaptic and postsynaptic structures,serial sections obtained using a laser scanning confocal microscope,and three-dimensional modeling obtained using 3DS MAX software. The method above is feasible and has important significance for further exploring the mechanism of sensorineural deafness.

关键词： inner hair cells Ribbon synapses laser scanning confocal microscope three-dimensional modeling

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Effect of calcitonin gene-related peptide and nerve growth factor on spatial learning and memory abilities of rats following focal cerebral ischemia/reperfusion

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Neural Regeneration Research 2006年第8期1卷 673-676页

作者： Guangshun Zheng1, Yongjie Yang2, Xiubin Fang3 1department of Neurosurgery, Second hospital of Xiamen, Xiamen 361021, Fujian province, china 2department of Neurosurgery, Second hospital affiliated to china medical university, shenyang 110004, liaoning province, china 3department of Neurobiology, Basic medical College of china medical university, shenyang 110001, liaoning province, china department of Neurosurgery Second Hospital of Xiamen Xiamen 361021 Fujian Province China department of Neurosurgery China Medical University Shenyang 110004 Liaoning Province China department of Neurobiology Basic Medical College China Medical University Shenyang 110001 Liaoning Province China

BACKGROUND: Calcitonin gene-related peptide (CGRP) and nerve growth actor (NGF) cam improve spatial learning and memory abilities of rats with cerebral ischemia/reperfusion; however, the effect of combination of them on relieving learning and memory injury following cerebral ischemia/reperfusion should be further studied. OBJECTIVE: To study the effects of exogenous CGRP and NGF on learning and memory abilities of rats with focal cerebral ischemia/reperfusion. DESIGN: Randomized controlled animal study. SETTING: department of Neurosurgery, the Second hospital of Xiamen; department of Neurosurgery, the Second affiliated hospital of china medical university; department of Neurobiology, Basic medical College of china medical university. MATERIALS: A total of 30 healthy male SD rats, aged 8 weeks, of clean grade, weighing 250-300 g, were provided by Experimental Animal department of china medical university. All rats were randomly divided into sham-operation group, ischemia/reperfusion group and treatment group with 10 in each group. The main reagents were detailed as the follows: 100 g/L chloral hydrate, 0.5 mL CGRP (2 mg/L, Sigma Company, USA), and NGF (1× 106 U/L, 0.5 mL, Siweite Company, Dalian). METHODS: The experiment was carried out in the department of Neurobiology, Basic medical College of china medical university from February to July 2005. Rat models of middle cerebral artery occlusion were established by method of occlusion, 2 hours after that rats were anesthetized and the thread was slightly drawn out for 10 mm under direct staring to perform reperfusion. Rats in the ischemia/reperfusion group received intraperitoneal injection of 1 mL saline via the abdomen at two hours later, while rats in the treatment group at 2 hours later received intraperitoneal injection of 2 mg/L CGRP (0.5 mL) and 1×106 U/L NGF (0.5 mL) once a day for 10 successive days. first administration was accomplished within 15 minutes after ischemia/reperfusion. Rats in the sham-operation

关键词： Effect of calcitonin gene-related peptide and nerve growth factor on spatial learning and memory abilities of rats following focal cerebral ischemia/reperfusion CGRP MCAO gene

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Decreased IgA+ plasma cells and IgA expression in acute liver necrosis mice

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World Journal of Gastroenterology 2010年第30期16卷 3827-3833页

作者： Jin-Long Fu, Zhao-Han Wang, Guo-Zhen Li, Yu-Rong Wang, Pei Liu, department of Infectious Diseases, The first Aff iliated hospital, china medical university, shenyang 110001, liaoning province, china department of Infectious Diseases The First Affiliated Hospital China Medical University Shenyang 110001 Liaoning Province China.

AIM: To investigate the number of intestinal immunoglobulin A (IgA+) plasma cells and expression of intestinal IgA in mice with acute liver necrosis. METHODS: A model of acute liver necrosis was established by intraperitoneal injection of galactosamine (GalN) and lipopolysaccharide (LPS). Sixty mice were randomly divided into one of 4 equal groups: normal control, acute liver necrosis, LPS, or GalN. Hematoxylin and eosin staining, immunohistochemistry, and an enzyme-linked immunosorbent assay were employed to assess liver and intestinal injury, count intestinal IgA+ plasma cells, and measure the expression level of IgA and interferon γ (IFN-γ) in the small intestinal mucosa of mice. RESULTS: Injured intestinal mucosa was observed in the acute liver necrosis group but not in the normal, LPS or GalN groups. Compared with the normal group,intestinal IgA+ plasma cells were slightly decreased in the LPS and GalN groups [429 ± 20 per high power f ield (HPF), 406 ± 18/HPF, respectively], whereas they were markedly decreased in the acute liver necrosis group (282 ± 17/HPF vs 495 ± 26/HPF in normal group, P 0.05). CONCLUSION: Intestinal IgA+ plasma cells and IgA expression levels indicating that mucosal immune barrier dysfunction, does exist in acute liver necrosis.

关键词： Acute liver necrosis Intestinal mucosa Immunity Immunoglobulin A

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Optical coherence tomography assessed retinal nerve fiber layer thickness in patients with Alzheimer's disease:a meta-analysis

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International Journal of Ophthalmology(English edition) 2012年第3期5卷 401-405页

作者： Xue-Fei He 1,Yi-Ting Liu 2,Cheng Peng 1,Fan Zhang 1,Shi Zhuang 1,Jin-Song Zhang 1 1Key Laboratory of Lens Research liaoning province,department of Ophthalmology,Eye hospital of china medical university,the Fourth affiliated hospital of china medical university shenyang 110005,liaoning province,china 2 department of Clinical Epidemiology,the first affiliated hospital,china medical university,shenyang 110001,liaoning province,china Key Laboratory of Lens Research liaoning province Department of Ophthalmology Eye Hospital of China Medical University the Fourth Affiliated Hospital of China Medical University Shenyang 110005 Liaoning Province China.

AIM:To investigate the difference of retinal nerve fiber layer(RNFL) thickness between Alzheimer's disease patients and normal people,so as to provide clue for the early diagnosis of Alzheimer's disease.· METHODS:The articles on the association of RNFL thickness and Alzheimer's disease were retrieved by searching international and national *** qualified articles were assessed by meta analysis with Stata11.0 *** results were pooled using weighted mean difference(WMD) with a corresponding 95% confidence interval(CI).· RESULTS:Totally 7 studies enrolled 324 eyes were included in the *** results of meta analysis showed that in AD patients,there was a significant average RNFL thickness reduction compared with the control group [WMD=-17.561,95%CI:(-23.971,-11.151)].There were significant differences in superior,inferior,nasal and temporal RNFL thickness between the two *** with a 95%CI were [-18.829,95%CI:(-25.915,-11.743);P34.304,-17.247);P 3);P<0.001] and [-14.565,95%CI:(-28.002,-1.128);P<0.001] ***'s test and Egger's test did not show significant difference,funnel plot was basically symmetrical,indicating that there was no publication bias existed.· CONCLUSION:There are significant differences in the RNFL thickness in all quadrants between the two *** thickness is reduced in AD patients compared with the control group.·

关键词： retinal nerve fiber layer thickness optical coherence tomography Alzheimer's disease meta analysis

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Controlling N-methyl-D-aspartate receptor subunit 1 with calcitonin gene related peptide after cerebral ischemic injury

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Neural Regeneration Research 2006年第7期1卷 585-588页

作者： Jixiang Cui1, Peng Qu2, Chunping Qiao3 1department of Clinical Laboratory, Fourth affiliated hospital of china medical university, shenyang 110032, liaoning province, china 2department of Neurobiology, Basic medical College of china medical university, shenyang 110032, liaoning province, china 3department of Emergency, Baicheng Central hospital of Jilin province, Baicheng 137000, Jilin province, china department of Clinical Laboratory Hospital of China Medical University Shenyang 110032 Liaoning Province China department of Neurobiology Basic Medical College China Medical University Shenyang 110032 Liaoning Province China department of Emergency Baicheng Central Hospital of Jilin Province Baicheng 137000 Jilin Province China

BACKGROUND: Activation of N-methyl-D-aspartate receptor (NMDAR) is a key link of exitotoxicity at the phase of cerebral ischemic injury. Because NMDAR is a main way to mediate internal flow of Ca2+ among glutamic acid receptors, over-excitation can cause neuronal apoptosis. Calcitonin gene related peptide has a strongly biological activity. On one hand, it can protect ischemic neurons through inhibiting the expression of NMDAR1 mRNA; on the other hand, it can play the protective effect through down-regulating the expression of NMDAR1 mRNA by exogenous calcitonin gene related peptide. OBJECTIVE: To observe the expression of NMDAR1 and the regulatory effect of calcitonin gene related peptide on the expression of NMDAR1 mRNA and protein in the cerebral cortex of rats with focal cerebral ischemia/reperfusion (I/R). DESIGN: Randomized controlled animal study. SETTING: china medical university. MATERIALS: A total of 216 healthy male Wistar rats, general grade, weighing 250-280 g, were selected in this study. Twelve rats were randomly selected to regard as control group; meanwhile, other 204 rats were used to establish middle cerebral artery occlusion/reperfusion (MACO) models. The main reagents were detailed as follows: calcitonin gene related peptide (Sigma Company); calcitonin gene related peptide kit (Boster Company); antibody Ⅰ, Ⅱ and antibody β-actin Ⅰ, Ⅱ of NMDAR1 mRNA and chemiluminescence reagent (Santa Cruz Company, USA). METHODS: The experiment was carried out in the Laboratory of Neurobiology of china medical university from August 2005 to June 2006. ① Right MCAO models of rats were established to cause focal ischemia and scored based on Zea Longa five-grade scale. If the scores were 1, 2 and 3 after wakefulness, the MACO models were established successfully and involved in the experiment. A total of 120 rats with successful modeling were randomly divided into I/R group and administration group with 60 in each group. All rats in the both groups were observed at

关键词： NMDAR mRNA Controlling N-methyl-D-aspartate receptor subunit 1 with calcitonin gene related peptide after cerebral ischemic injury gene

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Tanshinone IIA inhibits endothelin-1 production in TNF-α-induced brain microvascular endothelial cells through suppression of endothelin-con-verting enzyme-1 synthesis

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Acta Pharmacologica Sinica 2007年第8期28卷 1116-1122页

作者： Chao TANG~1 An-hua WU~(1,3) Hong-li XUE~2 Yurl-jie WANG~1 ~1department of Neurosurgery,the first affiliated hospital,china medical university ~2department of Neurosurgery,General hospital of shenyang Military Command,shenyang 110001,china. department of Neurosurgery the First Affiliated Hospital China Medical University Shenyang China department of Neurosurgery General Hospital of Shenyang Military Command Shenyang China

Aim:To investigate the effects of tanshinone ⅡA（Tan ⅡA）on the regulation ofthe production of endothelin（ET）-1（including large ET-1）,mRNA levels of ET-1,endothelin-converting enzyme-1（ECE-1）,endothelin-A receptor（ETA）andendothelin-B receptor（ETB）induced by TNF-α in rat brain microvascular endo-thelial cells（BMVEC）.Methods:The ET-1 release（including large ET-1）into theculture medium was determined by enzyme *** levels of ET-1,ECE- 1,ETA,and ETBmRNA were measured by *** receptor bind-ing was also ***:The induction of ET-1 release by TNF-α from cul-tured BMVEC was dose-dependently reduced by Tan IIA,but large ET-1 levelsprogressively increased in response to Tan ⅡA;the mRNA expression of ET-1 *** ⅡA also caused a decrease in ETAreceptor mRNA and ECE-1expression in a dose-dependent *** receptor binding was unal-tered in BMVEC stimulated with TNF-α alone or a combination of TNF-α and TanⅡ***:These findings suggest that Tan ⅡA may inhibit ET-1 produc-tion in TNF-α-induced BMVEC through the suppression of ECE-1 synthesis.

关键词： tanshinone IIA endothelin-1 TNF-α brain microvascular endothelial cells

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