Oxidative stress phys a very important role in the cerebral ischemia-reperfusion injury.The role of NADPH oxidases (NOX) in oxidative stress after ischemic stroke has been paid more attention and may become a new therapeutic target.This article sums up the major research progress between NOX and cerebral ischemia-reperfusion injury,discusses the characteristics of various isozymes and their relationship with stroke,further investigates the pathogenesis of stroke from the perspective of NOX,and provides a new idea for the prevention and treatment of ischemic stroke.

Metabolomics, the newest “omics”science after genomics, thranscriptomics and proteomics, is the study of simultaneous identification and quantification of products of the biochemical reaction within an or-ganism. It has been used in the study of papillary thyroid cancer. This review presents an introduction to the con-cept and research techniques of metabolomics and the progress of application in papillary thyroid cancer.

Objective To assess the clinical value of transcatheter arterial chemoembolization(TACE) for the treatment of metastatic liver leiomyosarcoma(MLL).Methods CT triphasic scanning and TACE were performed in 8 patients with MLL,which was proved by fine-needle aspiration biopsy and immunohistochemical study.A follow-up of 1-3 years was conducted.Based on the enhancement degree of the hepatic lesion and the DSA manifestations of the lesion,which were observed both before and after TACE,and also on the survival time,the therapeutic effectiveness was evaluated.Results Of the eight cases,single metastasis was seen in 3 and multiple metastasis in 5.Excellent result was obtained in 6 cases and good result in 2 cases.Based on the imaging findings,marked effect was seen in 3 cases,good effect in 4 cases and no improvement in one case.The surviva1 rate at 1,2 and 3 years was 87.8%,50.0% and 37.8% respectively.Conclusion TACE is a safe and effective treatment for MLL.

Objective To evaluate the clinical effects of the interlocking intramedullary nails in treatment of the floating knee. Methods Internal fixation with the interlocking nail in unilateral femur and tibia was performed on 6 patients with the floating knee, and the treatments of complications were analyzed and summarized. Results After operation the 6 patients were followed up and their X ray films were reviewed after 3, 6, and 12 months respectively. Fractures in unilateral femur and tibia healed at once in 4 patients, the union of one femur fracture delayed in one case and the union of tibia fracture delayed in one case. The knee joint could flex to 80～90 degrees in 5 of the 6 patients, and the other one could flex to 60 degrees. No shortening of the limb occurred in all the patients who healed after 6～18 months. Conclusion As the “floating knee”is a kind of high energy injury, often complicated with injury of important organs, the complication should be treated while the internal fixation be conducted as soon as possible. The interlocking intramedullary nail is a good device with which the function of the limb can recover fast with the postoperative dysfunction of the knee and ankle joints greatly reduced.

Cancelling drug price addition is one of public hospital reform content, under the condition of insufficient financial input, public hospitals should enhance the drug cost management, taking measures to reduce drug proportion, to deal with all kinds of hospital operation problems produced by hospital income decline due to the cancellation of drug addition. Through years of exploration and practice, Affiliated Hospital of Jining Medical University has controlled the rising of drug cost effectively and received better effect, which built a good foundation of public hospital reform.

Objective To investigate the effects of remifentanil on sinoatrial (SA) node autorhythmicity in rabbits.Methods Twenty-four healthy rabbits of both sexes weighing 1.8-2.2 kg were sacrificed.Their hearts were removed and sinoatrial nodes were dissected and placed in Tyrode solution saturated with 95 ％ O2-5 ％ CO2 at 36 ℃.The action potentials of the sinus node pacemaker cells were recorded by intracellular glass microelectrode technique.The experiment was performed in 3 parts (n =8 each).Part Ⅰ:the sinoatrial node was exposed to remifentanil 2,4,8,16 and 32 ng/ml respectively.The action potentials were recorded after the sinoatrial nodes were exposed to each concentration of remifentanil for 15 min.Part Ⅱ and Ⅲ:the sinoatrial nodes were first exposed to Ca2+ channel agonist Bay K8644 0.5 μmol/L or K+ channel blocker TEA 20 nmol/L for 15 min.Then remifentanil was added until the concentration reached 16 ng/ml (final concentration) and 15 min later the action potentials were recorded.The action potential parameters included,amplitude of action potential (APA),rate of pacemaker firing (RPF),action potential duration at 90％ repolarization (APD90) and velocity of diastolic depolarization (VDD).Results Remifentanil significantly decreased,APA,RPF,VDD and prolonged APD90 in a concentration dependent manner as compared with the baseline values.Pretreatment with Bay K8644 could block the effects of remifentanil on SA node pacemaker cells,while TEA did not affect the electrophysiologic effects of remifentanil on SA node pacemaker cells.Conclusion Remifentanil exerts a negative chronotropic action on SA node pacemaker cells.These effects are likely produced by decrease in Ca2+ current,while opening of K + channels is not involved in these effects.

Objective : To investigate the effect of aluminum exposure on expression of miR-497-5p, wingless murine breast cancer virus integration site family member 3a (Wnt3a), β-catenin protein, glycogen synthase kinase-3β (GSK-3β) protein and tau protein in rat adrenal pheochromocytoma PC12 cells, so as to provide insight into unraveling the mechanisms underlying aluminum exposure-induced abnormal phosphorylation of tau protein. Methods: PC12 cells were exposed to Al(mal)3 at concentrations of 0, 100, 200, 400 μmol/L for 24 h. The viability of PC12 cells was measured using cell counting kit-8 (CCK-8) assay. The relative expression of miR-497-5p and Wnt3a was detected using a real-time fluorescent quantitative PCR (RT-qPCR) assay, and the expression of Wnt3a, β-catenin, GSK-3β, P-GSK-3β (Ser9), tau and p-tau (Ser396) proteins were determined using Western blotting. Results : The viability of PC12 cells appeared a tendency towards a decline with the increase of aluminum dose (Ftrend=323.473, P=0.001). RT-qPCR assay detected that the relative miR-497-5p expression appeared a tendency towards a rise with the increase of aluminum dose (Ftrend=14.888, P=0.031), and the relative Wnt3a expression appeared a tendency towards a decline with the increase of aluminum dose (Ftrend=165.934, P<0.001). The miR-497-5p expression negatively correlated with the relative Wnt3a expression (r=-0.693, P=0.012). The expression of Wnt3a (Ftrend=357.656, P=0.001), β-catenin (Ftrend=208.750, P=0.001) and p-GSK-3β (Ser9) proteins (Ftrend=512.583, P<0.001) appeared a tendency towards a decline with the increase of aluminum dose, and the expression of GSK-3β (Ftrend=39.965, P<0.001), tau (Ftrend=277.929, P=0.006) and p-tau (Ser396) proteins (Ftrend=96.247, P=0.002) appeared a tendency towards a rise with the increase of aluminum dose. Conclusion Up-regulation of miR-497-5p and GSK-3β expression and down-regulation of Wnt3a and β-catenin expression may be a mechanism underlying aluminum exposure-induced abnormal phosphorylation of tau protein.

Objective To evaluate the value of region Ⅵ lymph nodes in surgical treatment of cN0 papillary thyroid carcinoma(PTC). Methods 98 cases of PTC with cN0 which received functional lymph nodes dissection were collected. We analyzed the results of pathologic examination by region Ⅵ lymph nodes distinguished from lateral neck lymph nodes(Ⅱ～Ⅴ) retrospectively. Results In 98 cases, the rate of region Ⅵ lymph nodes metastasis was 20.4 %(20 cases); the rate of region Ⅱ～Ⅴ lymph nodes metastasis was 13 cases(13.3 %). In cases with region Ⅵ lymph nodes metastasis, the rate of Ⅱ～Ⅴ lymph nodes metastasis was 45.0 %(9/20). Meanwhile in cases without region Ⅵ lymph nodes metastasis, the rate of Ⅱ～Ⅴ lymph nodes metastasis was 5.1 % (4/78, P

Objective To investigate the effects of remifentanil on lung ischemia-reperfusion (I/R) injury and expression of angiotensin-converting enzyme (ACE) mRNA in rats.Methods Forty pathogen-free adult male Sprague-Dawley rats,weighing 300-350 g,were randomly divided into 5 groups (n =8 each):sham operation group (group S),group I/R and different doses of remifentanil groups (groups R1-R3).Lung I/R was produced by occlusion of the left hilum of lung for 45 min followed by 120 min reperfusion.Remifentanil was infused intravenously at a rate of 0.2,0.6 and 1.2 μg·kg-1 ·min-1 until 120 min of reperfusion after a loading dose of 1 μg/kg at 15 min before occlusion of the left hilum of lung in groups R1,R2 and R3,respectively.The equal volume of normal saline was given in groups S and I/R.The rats were scarified at 120 min of reperfusion and lungs were removed for microscopic examination and determination of wet/dry lung weight ratio (W/D ratio) and the expression of ACE mRNA (by RT-PCR) in the lung tissue.The pathological changes of the lung were scored.Results Compared with group S,the pathological score and W/D ratio were significantly increased and the expression of ACE mRNA was up-regulated in groups I/R,R1 and R2,and the pathological score was significantly increased (P ＜ 0.05),and no significant change was found in W/D ratio and the expression of ACE mRNA in group R3 (P ＞ 0.05).Compared with group I/R,the pathological score and W/D ratio were significantly decreased and the expression of ACE mRNA was down-regulated in groups R2 and R3,and the pathological score and W/D ratio were significantly decreased (P ＜ 0.05) and no significant change was found in the expression of ACE mRNA in group R1 (P ＞0.05).Compared with group R1,the pathological score and W/D ratio were significantly decreased and the expression of ACE mRNA was down-regulated in group R3,and the pathological score and W/D ratio were significantly decreased (P ＜ 0.05) and no significant change was found in the expression of ACE mRNA in group R2 (P ＞ 0.05).The pathological score,W/D ratio and expression of ACE mRNA were significantly lower in groups R3 than in group R2 (P ＜ 0.05).The pathological changes of the lung were significantly reduced in groups R1-R3 as compared with group I/R.Conclusion Remifentanil can attenuate lung I/R injury in rats in a dose-dependent manner and down-regulation of ACE mRNA expression may be involved in the mechanism.