AIM: To investigate anti-oxidative and mitochondria protective effects of resveratrol on focal cerebral ischemia-reperfusion injury in rats. METHODS: Middle cerebral artery occlusion(MACO) was used to induce focal cerebral ischemia-reperfusion model.After 24 h reperfusion,MDA,GSH,NO,LD content and SOD activity in brain homogenate were determined,MDA,GSH content and SOD,ATPase activity in mitochondria were also determined. RESULTS: Resveratrol significantly inhibited the increase in MDA,NO,LD content and the decrease in SOD activity and GSH content in brain after cerbral ischemia-reperfusion.Resveratrol also significantly inhibited the increase in MDA and the decrease in activity of SOD,Na~+-K~+-ATPase,Ca~(2+)-Mg~(2+)-ATPase in mitochondria. CONCLUSION: Resvertrol has protective effects on focal cerebral ischemia-reperfusion injury via attenuating cerebral oxygen free radical lipid peroxidation and protecting mitochondria.

Objective To investigate the effects of dexmedetomidine on the end-tidal concentration of sevoflurane during recovery from breast cancer surgery under general anaesthesia. Methods A total of 120 patients undergoing unilateral breast cancer radical operation were randomly divided into four groups:group C (infusion of saline, n=30), group D0.5 [infusion of dexmedetomidine 0.5μg/(kg·h) during operation, n=30], group D0.6 [dexmedetomidine 0.6μg/(kg·h), n=30] and group D0.7 [dexmedetomidine 0.7 μg/(kg · h), n=30]. The end-tidal concentrations of sevoflurane during surgery and postoperation were observed. The end-tidal concentration of sevoflurane on palinesthesia was recorded. The time from stopping administration of anesthetic drug to palinesthesia and the operation time were recorded. The palinesthesia of patients from general anaesthesia and the degree of emergence agitation of the patient were measured using Riker ’s sedation-agitation scale. The operation time, anesthesia time, intraoperative remifentanil dosage, intraoperative auditory evoked potential index (AAI), sevoflurane inhalation concentration and the corresponding time were recorded. Results There were no significant differences in clinical data, remifentanil dosage, operation time and AAI between four groups. The anesthesia time was longer in group D0.7 than that in the other three groups (P<0.05). Compared to group C, the end-tidal concentration of sevoflurane during surgery, postoperation and palinesthesia were lower and the time of palinesthesia was delayed in groups D0.5, D0.6 and D0.7 (P<0.05). And the time of palinesthesia was delayed in group D0.7 than that of group D0.5 and group D0.6. Compared with group C, the ratio of Riker’s sedation-agitation scale>7 was lower in groups D0.5, D0.6 and D0.7 (P<0.05). The ratio of Riker’s sedation-agitation scale>4 was significantly higher in group D0.6 and group D0.7 than that in group C and group D0.5, but the ratio of score>6 was lower (P<0.05). The ratio of score>3 was higher in group D0.7 than that of other three groups (P<0.05). Intraoperative cardiac tachycardia was found in group D0.6 and group D0.7 (4 cases, 13%and 8cases, 7%). Conclusion Sevoflurane inhalation anesthesia and intravenous infusion of dexmedetomidine 0.6μg/(kg·h) can effectively reduce intraoperative sevoflurane dosage, the end-tidal concentration of sevoflurane during recovery, and the occurrence of agitation in patients undergoing general anesthesia.

Objective To examine the prevalence of plasmid mediated quinolone resistance (PMQR) genes and their correlation with the genes encoding β-lactamases in E.coli isolates.Methods A total of 200 levofloxacin-and/or ciprofloxacin-resistant E.coli isolates were collected from Fujian Medical University Union Hospital during the period from July to December 2013.PCR method was used to screen these E.coli isolates for the presence of qnrA,qnrB,qnrC,qnrD,qnrS,aac(6')-Ib-cr,qepA,oqxAB genes,and the blaTEM,blasnv and blacTx-M genes in the PMQR positive strains.Agar dilution method was utilized to measure the antimicrobial susceptibility of PMQR-positive strains.Phylogenetic analysis was conducted by triplex PCR.Enterobacterial repetitive intergenic consensus-polymerase chain reaction (ERIC-PCR) was used to evaluate the genetic similarity between the PMQR-positive isolates.Results Of the 200 clinical isolates of E.coli,58 (29.0％)were PMQR-positive.And qnr,aac(6')-Ib-cr,oqxAB,and qepA genes were positive in 11 (5.5％),41 (20.5％),16 (8.0％),1 (0.5％) strains,respectively.The genes encoding CTX-M-1,CTX-M-9 and TEM type enzymes was positive in 32 (55.2％),17 (29.3％),and 1 (1.7％) of the PMQR-positive strains,respectively.The blasHv gene was not identified in any isolate.PMQR-positive strains were multi-drug resistant.Phylogenetic analysis indicated that 21 (36.2％),17 (29.3％),11 (19.0％),and 9 (15.5％) of the PMQR-positive strains belonged to group A,group D,group B2 and group B 1,respectively.ERIC-PCR suggested the PMQR-positive isolates belonged to 50 different types.Only one strain was non-typeable.Conclusions Most of the PMQR-related genes in E.coli are aac(6')-Ib-cr,qnr,and oqxAB in our hospital,which are highly relevant to β-1actamase genes.PMQR-positive strains may spread by way of non-clonal dissemination in our hospital.

Objective To observe the minimum effective local anesthetic dose of intra-articular ropivacaine with dexmedetomidine for analgesia after knee arthroscopy in patients.Methods Seventy-two patients (35 males,37 females,aged 60-75 years,ASA grade Ⅰ or Ⅱ)undergoing knee arthro-scopy under total intravenous anesthesia were randomly divided into two groups (n =36 each):ropiv-acaine group (group R)and ropivacaine with dexmedetomidine group (group DR);Ropivacaine was injected intra-articularly in group C,and dexmedetomidine 1 μg/kg with ropivacaine was injected intra-articularly in group DR.ED50 of ropivacaine was determined by the sequence method.VAS score3 two hours after operation was rated as effective.The initial dose was 3 mg and according to the effective or ineffective results in previous patient,a dose of ropivacaine was decreased or increased 1.1 times to the previous patient.BP,HR,VAS Score,and OAA/S score were recorded five minutes preoperatively(T0 ),1 h (T1 ),2 h (T2 ),3 h (T3 ),6 h (T4 ),12 h (T5 ),24 h (T6 ),and 48 h (T7 ) after operation in two groups.Results There was no significant difference between the two groups with regard to the BP,HR,VAS Score,and OAA/S score.ED50 of ropivacaine for analgesia after knee arthroscopy was 0.31% (95%CI 0.30%-0.32%),and ED50 of ropivacaine with dexmedetomi-dine for analgesia after knee arthroscopy was 0.14% (95% CI 0.14%-0.1 5%). Conclusion Intra-articular administration of ropivacaine with dexmedetomidine could provide superior postoperative analgesia.The dose of ropivacaine for analgesia after knee arthroscopy should be reduced when combined with dexmedetomidine in patients.

This article expounds on the necessity of the introduction of comparative imaging in bone and joint imaging teaching according to the bone and joint imaging teaching situation and modern medical radiographic features.Meanwhile,it discusses the application of comparative imaging in bone and joint imaging teaching from aspects of teaching method,teaching effect evaluation and prospects of the comparative imaging.

Objective To compare and analysis of the clinical effect of Sanziyangqin decoction and ambroxol hydrochloride in the treatment of bronchiolitis.Methods 125 cases of bronchiolitis patients with complete data collected were retrospectively analyzed, randomly divided into control group ( 62 cases ) and observation group ( 63 cases ) , were treated with conventional ambroxol hydrochloride and Sanziyangqin decoction. The improvement of clinical symptoms, hospitalization time and treatment effect of the two groups were observed.Results The observation group of cough, wheezing, shortness of breath, throat phlegm and rales disappeared time and hospitalization time were significantly shorter than the control group, the difference was statistically significant (P<0.05).After treatment, the observation group of the total effective rate was 95.24%, significantly higher than the control group 72.58%, the difference was statistically significant (P<0.05).After Three months of treatment, the quality of life (GQOLI-74) was used to evaluate the scores of the patients in the two groups.The scores of the observation group were significantly higher than those of the control group, the difference was statistically significant (P<0.05).Before and after treatment in the two groups respectively were detected in blood and liver and kidney function, urine routine and other indicators, the detection and comparison were not abnormal, and the two groups before and after treatment were not found any adverse reaction.Conclusion The treatment of bronchiolitis in patients with Sanziyangqin decoction has the exact effect, compared with conventional ambroxol hydrochloride treatment can better improve the patient's clinical symptoms and signs, shorten the hospitalization time, improve the treatment efficiency and quality of life of patients, and there is no adverse reactions, is a safe and effective treatment method.

Objective To observe the effect of sinomenine(SINO) on immune function of adjuvant arthritis(AA) rats.Methods SD rats were randomized into normal group,model group,SINO groups(treated with gastric gavage of SINO at the doses of 60,120 and 240 mg/kg respectively),and glucosides of Tripterygium Wilfordii(30 mg/kg) group.Except the normal group,the rats in other groups received subcutaneous injection of the complete Freund's adjuvant 0.1mL into the left hind foot to induce AA.The medication began from 12 days after the modeling and lasted 12 days.The pedal swelling and joint function scores were observed in different time.Radioimmunoassay was used to detect the contents of interleukin-1?(IL-1?) and tumor necrosis factor ?(TNF-?) in synovial cells.Expression of IL-1? and TNF-? mRNA was examined by reverse transcription-polymerase chain reaction(RT-PCR) assay.Results SINO at different concentrations decreased the pedal swelling and arthritis scores to various degrees,inhibited the production of IL-1? and TNF-? in the synovial cells,reduced the expression of IL-1? and TNF-? mRNA,and recovered the normal histological features of synovial cells in AA rats.Conclusion The therapeutic mechanism of SINO for rheumatoid arthritis may be related with the inhibition of secretion of inflammatory mediators in synovial cells,and with the recovery of histological features of synovial cells.

Objective To investigate the expression of blood CD +4 CD +25 Treg GITR,CD +4 T cell GITRL in children with asthma,and the role of them in asthmatic inflammation.Methods 50 cases of severe asthma were selected,and were controlled with thirty two healthy children.The venous blood was collected both in the period of acute episode and clinic remission.The mean fluorescence intensity of CD +4 CD +25 Treg GITR and CD +4 T cell GITRL was detected by flow cytometry.Results The expression of CD +4 CD +25 Treg GITR in the asthma acute period group was (24.2 ±8.2)MFI,which was significantly lower than (28.5 ±6.0)MFI in the control group(t =2.5,P <0.05).While there was no significant difference of CD +4 T cell GITRL expression between the asthma acute period group[(5.2 ±3.6)MFI]and the control group[(4.6 ±1.0)MFI](t =1.1,P >0.05).Moreover,the expression of CD +4 CD +25 Treg GITR in the asthma in remission group after treatment was (29.5 ±8.3)MFI,which was significantly higher than that in acute period group before treatment(t =-9.9,P <0.01 ).Whereas,there was no significant difference of CD +4 T cell GITRL expression in asthma group between in remission after treatment[(5.7 ±3.6)MFI] and in acute period before treatment(t =-1.6,P >0.05).Furthermore,there was no significant correlation between levels of CD +4 CD +25 Treg GITR and CD +4 T cell GITRL.Conclusion The level of CD +4 CD +25 Treg GITR in acute period asthmatic patients was decreased,but it was increased in remission,but no changes of CD +4 T cell GITRL expression were observed.GITR/GITRL signal system might be involved in the asthmatic inflammation procession.

OBJECTIVETo investigate the corrosion resistant properties of titanium samples prepared by anodic oxidation with different surface morphologies.

METHODSPure titanium substrates were treated by anodic oxidation to obtain porous titanium films in micron, submicron, and micron-submicron scales. The surface morphologies, coating cross-sectional morphologies, crystalline structures, and surface roughness of these samples were characterized. Electrochemical technique was used to measure the corrosion potential (Ecorr), current density of corrosion (Icorr), and polarization resistance (Rp) of these samples in a simulated body fluid.

RESULTSPure titanium could be modified to exhibit different surface morphologies by the anodic oxidation technique. The Tafel curve results showed that the technique can improve the corrosion resistance of pure titanium. Furthermore, the corrosion resistance varied with different surface morphologies. The submicron porous surface sample demonstrated the best corrosion resistance, with maximal Ecorr and Rp and minimal Icorr.

CONCLUSIONAnodic oxidation technology can improve the corrosion resistance of pure titanium in a simulated body fluid. The submicron porous surface sample exhibited the best corrosion resistance because of its small surface area and thick barrier layer.

Objective To explore the quantity change and significance of CD14-/CD11b+/CD33 + myeloid-derived suppressor cells (MDSCs) in patients with multiple injury. Methods Thirtyfour patients with multiple injury and seven healthy volunteers were enrolled in this study. Peripheral blood was collected and the factors of CD14-/CD1 1 b+/ CD33 + were taken as markers of MDSCs. The percentage of MDSCs was determined by flow cytometry (FCM) and serum interleukin-10 and C-reactive protein levels were determined by ELISA to analyze the quantity change and clinical significance of MDSCs. Results The percentage of MDSCs in peripheral blood of healthy volunteers was (1.13 +0. 25) %. At days 1,2, 3 and 7 after injury, the percentage of MDSCs in peripheral blood were (1.20 +0.22) %, (6.44 + 0.35) %, (13.84 ± 2.07) % and (15.60 ± 1.63) % respectively in patients with infection and multiple injury, whereas (1.29 ±0. 30)%, (4.93 +0. 32)%, (5.15 ±0. 21)% and (3.77 ± 0.34) % respectively in patients without infection. The percentages of MDSCs in two groups showed significant differences at days 2, 3 and 7 after trauma (P＜0.05). No correlation was found between MDSCs percentage in peripheral blood and injury severity score, serum interleukin-10 or C reactive protein in patients with multiple injury (P ＞ 0.05). Conclusions The increase of proportion ofMDSCs in peripheral blood correlates with the onset of infection in patients with multiple injury, indicating that the expansion of MDSCs in peripheral blood may play important roles in immune dysfunction after multiple injury.