Objective:To investigate the Prostaglandin E2(PG-E2),Leukotrienes B4(LT-B4)、Platelet activating factor(PAF) and vascular endothelial growth factor (VEGF) levels in the model of UC rats serum,and the changes after the Mesalazine,clostridium, and montmorillonite powder treatment intervention ,in order to understand the significance of the four inflammatory factors in UC rats and the interference effect of the above three drugs on the four inflammatory cytokines .Methods:100 rats were randomly divided into normal group(A),model group(B),Mesalazine group(C),clostridium group(D)and montmorillonite group(E),The levels of the plasma PG-E2,LT-B4,PAF and VEGF were measured by ELISA .The different changes of the four cytokines were compared in the different groups.Results:①The scores of DAI and the levels of the plasma PGE2,LTB4,PAF and VEGF in the B,C,D and E group were higher than ones in A group(P<0.05).②Compared B group,the scores of DAI and the levels of plasma PGE2,LT-B4,PAF and VEGF in B,C,D and E group were lower ( P<0.05 ) .③Compared the efficacy among mesalazine , clostridium and montmorillonite powdergot treating UC , mesalazine and montmorillonite powder got the best results ( P<0.05 ) .The efficacy between mesalazine and montmorillonite was similar.Conclusion:①The PGE2,LT-B4,PAF and VEGF are very active higher in the blood of rats with UC and have a positive correlation with inflammation .②Mesalazine, clostridium and montmorillonite powder may renovate the damage of inflammatory tissues of rats with UC , and relieve the symptoms of inflammation , and also shorten the duration of inflammation by reducing exudation of proinflammatory cytokines PGE 2,LTB4,PAF and VEGF.

Animals ; Hypothermia ; blood ; Hypoxia ; blood ; Malondialdehyde ; blood ; Myocardial Ischemia ; blood ; Rabbits ; Superoxide Dismutase ; blood

Trehalose, a compatible solute, is widely used in food, cosmetics, pharmaceutical products and organ transplantation. Nowadays, trehalose is mostly produced by enzymatic synthesis with many secondary products and lowpurity. In this study, high amount of trehalose was produced by recombinant E. ccli fermentation. First, a bifunctional trehalose gene TPSP was amplified from genome of C. hutchinscoii. Second, an expression vector pTac-HisA containing TPSP was constructed and transformed into the host E. coli. Expression of this bifunctional enzyme-TPSP converted glucose to trehalose. The result suggested that TPSP from C. hutchinsonji has been successfully expressed in E. ccoi. High amount of extracellular trehalose generated from glucose by whole-cell catalysis and After optimization, the production of trehalose in shake flasks was improved to 1.2 g/L and the relative conversion rate reached 21%. The production in bioreactor reached 13.3 g/L and the relative conversion rate reached 48.6%. It is the first time to realize the functional expression of the bifunctional enzyme-TPSP of C. hutchinsonii in E. coli and achieved the conversion form glucose to trehalose. This study laid a foundation for industrial large-scale production of trehalose.
Bioreactors ; Catalysis ; Escherichia coli ; genetics ; Glucose ; Glucosyltransferases ; Industrial Microbiology ; Organisms, Genetically Modified ; Trehalose ; biosynthesis

Respiratory dysfunction is a significant part of disorders associated with stroke. Stroke could impair respiratory center or motor pathway, leading to alter breath pattern or reduced respiratory muscle strength. Pneumonia secondary to stroke and stroke-associated sleep apnea are common respiratory disorder, which are adverse to the prognosis of stroke. Clinical routine physical examination is basic evaluation of respiratory function. Attention should be paid especially in breath pattern, respiratory muscle volume and muscle tone. Multiple quantitative assessments include arterial blood gas analysis, sleep apnea monitoring, dynamical, imaging and electrophysiological tests. Rehabilitation can be used to improve the inspiratory muscle strength, endurance and cough effectiveness, reduce sleep apnea hypoventilation, enhance the cardiorespiratory fitness, finally improve the quality of life in stroke patients.

Objective To investigate the effect of early rehabilitation intervention on acute cerebral infarction.Methods 132 patients with acute cerebral infarction were evenly divided into the observation group and the control group: the former received early rehabilitation intervention and the latter routine nursing intervention.The two groups were assessed and compared with Fugl-Meyer Assessment(FMA),Bathel Index(BI)and Self-rating Depression Scale(SDS).Results The scores on FMA and BI in the observation group were higher than those in the control group(P<0.05),while the scores on depression in the observation group were lower than those in the control group(P<0.05).Conclusion The early rehabilitation intervene may improve the motor function and activities of daily living and reduce the degree of depression.

Objective To explore the risk factors of urolithiasis incidence of migrant workers in Zhongshan,in order to provide the scientific evidence for preventing urolithiasis.Methods 1 630 workshop migrant workers and 1630 office white collar workers were selected as the subjects of this study.The questionnaire was conducted according to the age,gender,genetic factors,occupation,past illness factors,living environment,work environment factors,diet habit,the habit of drinking water survey,B ultrasound examination,the detection of blood uric acid.Results The incidence rate of urolithiasis was 6.53％,the incidence rate of workshop migrant workers was 8.28％,which was significantly higher than that of white collar 4.72％ (x2 =16.972,P ＜0.01).Conclusion Work environment,eating habits,drinking habits,smoking and sweating are related risk factors of urolithiasis.

Objective To know about recent experience of the quality control of blood clotting,to analyze the reasons for its out-of-control,and then to explore the influencing factors of coagulation tests.Methods According to the testing standards of coagula-tion quality control products of Clinical Laboratory Center,Ministry of Health,each batch of products were taken standardized tests.The external quality control results of blood clotting from 2009 to 2013 were analyzed and counted up combined with the in-ternal quality control and daily work performance.Results The overall performance of external quality control was good (from 2009 to 2013).The total scores in 2009 were 90%,95%,were 100% and 100% in 2010,were 95% and 95% in 2011,were 100%and 85% in 2012,and were 100% and 100% in 2013.Conclusion Laboratory internal quality control should be guaranteed.The quality control of pre-analysis,post and analysis and analysis-in-course can improve clinical coagulation testing quality.

Objective To detect the efficiency and function of NK cell differentiation from human umbilical cord he?matopoietic stem cells (HSCs) in vitro. Methods CD34+hematopoietic stem cells were isolated from human umbilical cord blood, and inoculated into SCGM medium containing 20 μg/L FMS like tyrosine kinase 3 ligand (Flt-3L), stem cell fac?tor (SCF), interleukin (IL)-7, IL-15 and IL-21. And CD34+HSCs were differentiated into NK cells in directional inducing. The growth state of cells was observed. The expressions of CD56, NKG2D, NKp46, CD3, CD19 and CD34 were detected by flow cytometry in the differentiation of 7, 14, 21 and 28 d. In the differentiation of 21 d and 28 d, the differentiation cells were used as effector cells, and K562 cells as target cells. The ratios of effector cells and target cells were 8∶1, 4∶1, 2∶1 and 1∶1. The killing activity of the differentiated cells was detected by lactate dehydrogenase (LDH) cell toxicity assay and 7AAD/CFSE labeling method. Results CD34+HSCs derived from human umbilical cord blood can proliferate in vitro under appropriate condition. There were no significant differences in the expression of CD3 and CD19 between different differentia?tion stages (7, 14, 21 and 28 d, P>0.05). The expressions of CD56, NKG2D and NKp46 were significantly different (P<0.05), and the ultimate expression amount was (72.57±1.60)%, (32.83±1.29)%and (29.53±2.40)%. The expression of CD34 decreased gradually, and the lowest was (12.13 ± 2.01)%. The maximum killing activity detected by LDH cell toxicity assay and 7AAD/CFSE labeling method reached(49.91±2.76)%and (40.87±1.12)%.The killing activity of NK cells was decreased in the order of 8∶1, 4∶1, 2∶1 and 1∶1 groups (P<0.05). There was no significant difference in the killing activity between NK cells of 28 d and 21 d. Conclusion Human umbilical cord hematopoietic stem cells can differentiate into NK cells un? der appropriate conditions in vitro, and the NK cells induced from differentiation are with killing activity.

Objective To assess the clinical value of transcatheter arterial chemoembolization (TACE) with polyvinyl alcohol (PVA) particles as embolic material in patients with primary hepatic cancer (PHC). Methods Twenty patients with PHC underwent TACE. The mixed emulsion of chemotherapy agents and lipiodol was given to embolize the tumor vssTranscatheter arterial chemoembolization using polyvinyl alcohol feeding artery of tumors. The tumors size, response rate and Alpha-Fetoprotein (AFP) value were monitored respectively at the end of the first month, the third month, the sixth month and the first year after TACE. The changes of liver function, including serum aspartate aminotransferase (AST), alanine aminotransferase (ALT) and total bilirubin (TBILI), were recorded within 1 week and 1 month after TACE. The time to progression and the overall survival were recorded. Results Compared with pre-TACE, the tumor size decreased obviously at the end of the first month, the third month, the sixth month and the first year after TACE (P<0.05), the response rate reached 80.00%, 90.00%, 95.00% and 95.00%, respectively. The AFP value decreased obviously. Serum AST, ALT and TBILI significantly increased in the first week after TACE (P<0.05), but returned to preoperative level within 1 month. The average follow-up time was (19.8±7.0) months (range 12-32 months), the time to progression was (17.0±6.8) months, and the overall survival was (19.3±7.0) months. Conclusion PVA particles are optimal embolic material for TACE of PHC. Superselective embolization is necessary in TACE to achieve effective tumor devascularization and reduce liver damage.

Objective To study the technique and clinical significance of percutaneous biopsy of transplanted liver guided by CT.Methods 19 transplanted liver were undergone 25 times of percutaneous biopsy and the pathomorphologic changes were demonstrated by HE staining.Results The successful rate of the percutaneous biopsy was 100% for all the 25 times of this procedure,including acute rejection on 9 episodes,preservation perfusion retrauma in 6,bile duct strictures in 4,drug-induced injury in 4,chronic rejection in 1 and acute hepatic necrosis in 1.Conclusions CT-guided percutaneous biopsy is an important method for diagnosing transplanted liver injury and providing great value for distinguishment of the causes for transplanted liver injury.(J Intervent Radiol,2007,16:855-857)