Heart ; physiology ; Humans ; Stress, Physiological

Objectives: To investigate the effects of adhesion and proliferation of bone mesenchymal stem cells (BMSCs) in the surface of lactic acid/glycolic acid/asparagic acid-co-polyethylene glycol PLGA-[ASP-PEG] tri-block polymer scaffolds, try to find a new biomaterial to induce seed cells in vitro for bone tissue engineering. Methods: Modified PLGA with polyethylene glycol (PEG) and asparagic acid (ASP) that has many ligands, and synthesis PLGA-[ASP-PEG] polymer material. BMSCs were cultured in PLGA-[ASP-PEG] polymer material and PLGA used as control group. Through precipitation method, MTT assay and total cellular protein detection to test the adhersion and proliferation of BMSCs. Scanning electron microscope is used to observe cells appearance. Results: BMSCs on the surface of PLGA-[ASP-PEG] polymer scaffolds are adherention to the culture flask, the number of cells is much higher than PLGA’s. The precipitation method suggest that adhesion and proliferation of BMSCs on the surface of PLGA-[ASP-PEG] is much higher than the control group(P

Objective To compare application in Beijing population using the diagnostic criterias for metabolic syndrome(MS)according to the criterias of the International Diabetes Federation(IDF),Third Report of the National Cholesterol Education Program(NCEP)Expert Panel on Detection,Evaluation,and Treatment of High Blood Cholesterol in Adults[ATP Ⅲ(revised)]and Chinese Diabetes Society(CDS), respectively.Methods This study was based on an investigation on the risk factors of cardiovascular diseases involving 4 628 cases.MS was diagnosed according to these three definitions respectively and prevalence derived from these three definitions was compared.Results The prevalence of MS were 40.3 %, 44.3% and 35.7% according to the IDF,ATP Ⅲ(revised)and CDS respectively.The agreement in the diagnosis of MS using IDF and CDS,ATP Ⅲ(revised)and CDS,IDF and ATP Ⅲ(revised)were 81.9%, 83.7% and 96.0% respectively.There were 4.0% subjects among the MS patients diagnosed by ATP Ⅲ (revised)who can not be screened by IDF criteria.The prevalence of obesity was 19.6% according to ATP Ⅲ,much lower than the prevalence using CDS and IDF,whereas this rate increased to 58.6% using ATP Ⅲ(revised)criteria,showing diagnostic agreement with CDS.The coincidence rate between ATP Ⅲ (revised)and CDS was 80.6% Conclusion This investigation shows good agreement in the diagnosis of MS using IDF,CDS and ATP Ⅲ(revised)among Beijing population and these criterias can be used in China.

OBJECTIVETo investigate the influence of total flavonoids of Elsholtzia splendens (TFES) on isolated ischemia/reperfusion rat hearts and its underlying mechanisms.

METHODSHearts isolated from male SD rats were perfused on the Langendorff apparatus and subjected to global ischemia for 30 min followed by 120 min of reperfusion. The cardiac infarct size was measured by TTC staining. Hemodynamic parameters and the level of lactate dehydrogenase (LDH) in the coronary effluent were measured. Absorbance at 520 nm was determined in isolated cardiac mitochondria exposed to 200 micromol/L CaCl2 to detect the opening of the mitochondrial permeability transition pore.

RESULTSPretreatment with TFES (1, 10, 100 microg/ml) for 5 min decreased infarct size and LDH release and improved the recovery of the left ventricular developed pressure. In mitochondria, the decrease of absorbance at 520 nm evoked by CaCl2 was greatly inhibited by TFES.

CONCLUSIONTFES prevents myocardial ischemia/reperfusion injury, and this cardioprotective effect is probably via inhibiting mitochondrial permeability transition pore opening.

Animals ; Cardiotonic Agents ; pharmacology ; Disease Models, Animal ; Flavones ; pharmacology ; In Vitro Techniques ; Lamiaceae ; chemistry ; Male ; Mitochondria, Heart ; drug effects ; Mitochondrial Membrane Transport Proteins ; drug effects ; Myocardial Reperfusion ; Myocardial Reperfusion Injury ; prevention & control ; Rats ; Rats, Sprague-Dawley

OBJECTIVETo make clear the burden of injury in residents living in countryside of Dongying, Shandong Province.

METHODSA retrospective questionnaire survey was conducted among 15,276 residents in 20 villages of Dongying Municipality of Shandong Province with a multiphase cluster randomly sampling on cases of injury from March 1, 2002 to February 28, 2003. The injury was decided with three principles which had been carried out through the nation. The standardized incidence and mortality rates were calculated on base of the population data of Shandong Province in 2000. The burden of injury was evaluated by incidence rate, mortality rate, years of potential life lost (YPLL) system, disability adjusted life year (DALY), direct and indirect economic costs, et al.

RESULTSTotally 902 were injured cases in which the crude incidence rate was 5.90%, and the standardized incidence rate was 5.93%. It was shown higher in men (7.79%) than in women (4.03%). The crude death rate was 12.438 per million. And the standardized death rate was 11.257 per million. 27 cases were crippled. The years, the working years and the valued years of the potential life lost were 24, 19.6 and 8.7 years respectively for each death case. Disability adjusted life years was 566.61 years. Direct economic cost for medical expenses of all cases was 816.3 thousand RMB Yuan and 200.1 thousand RMB Yuan for else costs. Indirect economic cost was 5,492.9 thousand RMB Yuan according to DALY.

CONCLUSIONInjury was common incidence in rural residents in Dongying which caused a heavy burden on them. Prevention and control of injuries would be enhanced.

Accidents, Traffic ; economics ; Adolescent ; Adult ; Aged ; Child ; Child, Preschool ; China ; Cost of Illness ; Female ; Humans ; Infant ; Infant, Newborn ; Male ; Middle Aged ; Rural Population ; Surveys and Questionnaires ; Wounds and Injuries ; economics ; Young Adult

Objective To explore the effect of Fas/FasL pathway on fluoride.induced apoptosis in hurnan neumbla8toma SH-SY5Y cells.Methods The cell survival rate,percentage of apoptosis,and mRNA expression levels of Fas and FasL were measured respectively after the SH-SY5Y cells were exposed to O(control),20,40,80 mg/L sodium nuoride(NaF)for 24 hours/n vitro.Furthermore,the changes of the percentage of apoptosis and mRNA expression levels of Fas and FasL in 40 mg/L NaF-treated groups incubated with activaling or neutralizing anti-Fas antibody(CH11 or ZB4)also observed respectively.Results Compared with the control group(100.00%), the cell surval rates in 40,80 mg/L NaF-treated groups[(84.63±2.57)%,(69.04±5.63)%]were significandy lower(P<0.01).The percentage of apoptosis in 40,80 mg/L NaF.treated groups[(8.54±1.95)%.(17.94±2.71)%]were higher(P<0.05)than thal in the control group[(3.32±1.33)%],and increased with the dose of NaF.NaF could up-regulate Fas and FasL mRNA expression,and increased the Fas/β-actin [40 ms/L group (0.94±0.51),80 mg/L group(0.99±0.12)]and FasL/β-actin[40 mg/L group(0.96±0.42),80 mg/L group(0.99±0.24)] ratio,compared with the control[Eas/β-actin(0.50±0.33),FasL/β-actin(0.58±0.23)],both the difference had 8tatistical significances (P<0.05).NaF and CH I 1 had a synergisfic effect on apoptosis and mRNA expression levels of Fas and FasLL(F=32.89,18.46,.14.69,P<0.01)while NaF and ZB4 had an antagonistic effect (F=5.73,24.26,10.17,P<0.05 or<0.01).Conclusion NaF exposure can cause apoptosis in SH-Y5Y cells,and the Fas/FasL pmhway may play an important role in NaF-induced apoptosis.

Objective To explore the molecular types of methicillin-resistant Staphylococcus aureus (MRSA) strains present in major hospitals in Qingdao area, using pulsed-field gel electrophoresis (PFGE) and multilocus sequence typing (MLST) methods, trying to find out the epidemiological characteristics of these MRSA isolates. Correlation of the PFGE types with microbiological phenotypes and clinical data was also studied. Methods 360 isolates of MRSA were procured during 2003 to 2007 from major hospitals in Qingdao. PFGE technology was applied to comparatively analyze the chromosomal DNA digested with endonuclease Sma Ⅰ . Comparison of DNA fragments patterns from each MRSA strain and cluster analysis were performed with the Bionumericus version ' 2.0' software. A dendogram was generated using PFGE macrorestriction fragments on gel images. Data was used to predict the possibility of each PFGE type via SPSS software version 11.0, using the variables as predictors including groups on patient's age, gender, source and the site where MRSA was isolated. Antibiotic sensitivity patterns of these MRSA isolates were determined by K-B tests, and a correlation between these patterns and PFGE types was investigated. Housekeeping genes were amplified with PCR and sequenced in representative strains of variant PFGE types to identify their allelic profile. Results 5 types of PFGE patterns (M0-M4) were identified with MI being the predominant and M2 next to it which was significantly correlated to the isolates from wounds. M3 type strains were mainly isolated from ICU wards and there were a few cases complied with M4 type with no correlated variant factors found in this study. A unique pattern of MRSA isolates with its M0 distinct from other types had not been reported. No significant association was found between PFGE individual types,gender or age groups. M1 and M2 types were the major proportional PFGE patterns among different hospitals. No vancomycin-resistant isolates were detected among 360 MRSA strains. No significant association was found between individual antibiotic resistance and specific PFGE types. Data from MLST analysis showed that the aUelic profiles of M1 and M3 type strain had the same ST239 linage which was commonly present in China. For M2 and M4 representative strains, the allelic profiles were ST5 and ST240, respectively. ST45 and ST398 were corresponding to two PFGE patterns clustered as M0 type. Conclusion Nosocomial infection due to MRSA was evenly distributed among different age groups and no gender bias was observed. The PFGE types of MRSA strains isolated in major hospitals in Qingdao were highly correlated with the sources of isolates and ST239 isolate seemed the prevalent and widespread one. Strategies should be designed to further monitor and prevent or minimize the spread of ST5 MRSA isolates and the like, in Qingdao area.

Objective To investigate the effects of remote ischemic postconditioning (RIPoC) on global cerebral ischemia-reperfusion (I/R) injury in rats.Methods One hundred and twenty-eight male adult SD rats weighing 200-250 g were randomly divided into 4 groups ( n =32 each):sham operation group (group S),group I/R,group I/R + RIPoC and remote I/R group (group RI/R ).Global cerebral I/R was induced by four-vessel occlusion.Group I/R + RIPoC received 3 cycles of 15 min reperfusion followed by 15 min ischemia in bilateral femoral arteries at the beginning of cerebral reperfusion.The rats were sacrificed at 24 and 48 h of cerebral reperfusion,and brains were removed for determination of neuronal apoptosis (by TUNEL method) in hippocampal CA1 region and the parietal cortex,Bcl-2 and Bax expression (by Western blot) in hippocampal CA1 region.The superoxide dismutase (SOD) and catalase (CAT) activity and malondialdehyde (MDA) content in hippocampal CA1 region and the parietal cortex were also measured at 48 h of cerebral reperfusion.Morris water maze task was used to test the learning and memory function at 4 d of cerebral reperfusion,and the rats were sacrificed at 7 d of cerebral reperfusion,and brains were removed for determination of neuronal density in hippocampal CAl region and the parietal cortex.Results Cerebral I/R significantly increased the number of apoptotic neurons and MDA content,upregulated Bcl-2 and Bax expression,decreased neuronal density,SOD and CAT activity and learning and memory function in group I/R as compared with group S.RIPoC significantly attenuated these cerebral I/R-induced changes.Conclusion RIPoC could protect brain against global cerebral I/R-induced injury,and the mechanism may be related to inhibiting lipid peroxidation,regulating the balance between Bcl-2 and Bax and inhibiting apoptosis.

The skin ulceration syndrome of sea cucumber is a kind of desease induced by bacterium.In order to investigate the bacterium of infected sea cucumber and detect the N-acyl-homoserine lactones(AHLs) se-cretion of the bacterium,7 bacterial strains were isolated from the infected sea cucumber.These strains were identified by physiological-biochemical characteristics and 16S rDNA sequence.Results show that strain C6 belongs to Tenacibaculum,strain 4 belongs to Shewanella putrefaciens group,strain TB belongs to Vibrio,strain BP2,BP3,BP4 and BP6 belong to Pseudoalteromonas,respectively.AHLs were detected with strain Agrobacterium tumefaciens KYC55.Among these bacterial strains,strain C6,4,TB,BP3 and BP4 can se-cret AHLs,while strain BP2 and BP6 can’t.And the AHLs activity differs,from the highest to the lowest are 4,TB,BP4,BP3 and C6.

Objective To observe the therapeutic effect and toxicity reaction of Oxaliplatin com- bined with XeLoda in the treatment of 42 patients with advanced colorectal cancer.Methods All the pa- tients were treated with Oxaliplatin(130 mg/m~2,ivgtt for 2 h,d1)combined with XeLoda(2000 mg?m~(-2)?d~(-1), po,bid,d1 to d14).The regime was repeated every 21 days for at least 3 consecutive cycles.Results The to- tal response rate was 40.5%(17/42)in which 2 got CR and 15 PR.24 patients got Kamofsky score increased. The major toxic effects were alopecia,peripheral neuritis,gastrointestinal tract reactions and myelosuppression. Conclusion Oxaliplatin combined with XeLoda regimen is effective in the treatment of advanced colorectal cancer,and its toxicity is tolerable.It is worth studying in the future.