Researching tissue engineered biliary duct aims to repair,replace and regenerate damaged or diseased bile duct by using the in vitro constructed tissues.In this article,we reviewed the cell sources,and scaffolds and the current status of the construction of the tissue engineered biliary duct in tissue engineering.and discussed the existing obstacles and development trends.Tissue engineered biliary duct has an intriguing perspective for the replacement therapy,but it is still at an early stage,its true value remains to be evaluated.

A novel solid-phase extraction (SPE) adsorbent for simultaneous extraction of atrazine (ATZ) and its metabolites, deisopropylatrazine (DIA) and deethylatrazine (DEA) from environmental water samples was prepared. Polyacrylonitrile nanofibers (PAN NFs) mat was prepared via electrospinning, and was further functionalized to obtain polypyrrole modified polyacrylonitrile nanofibers (PPy-PAN NFs) mat, hydrazine modified polyacrylonitrile nanofibers (NH2-PAN NFs) mat and carboxyl modified polyacrylonitrile (COOH-PAN NFs) mat. The results showed that the adsorption capacity of COOH-PAN NFs mat was better than other three NFs mats in both static (2.0 mg/g) and dynamic (0.19 mg/g) experiments. Meanwhile, the runoff ratios of COOH-PAN NFs mat were the lowest (less than 30.0％) in the adsorption of three analytes, especially for high polar analytes, which showed that the hydrogen bond between carboxyl groups and analytes was the main interactive force. A combination of mat-based SPE and high performance liquid chromatography-diode array detection was further established for determination of 3 analytes in environmental water samples. The recoveries were 81.4％-120.3％ and the limits of detection were 0.12 ng/mL for DIA, 0.09 ng/mL for DEA and ATZ, respectively.

Cell Line, Tumor ; Genetic Vectors ; Humans ; Male ; Neuraminidase ; genetics ; metabolism ; Prostate ; metabolism ; Prostatic Neoplasms ; metabolism ; pathology

Adolescent ; Ammonia ; poisoning ; Female ; Humans

Fluke Electrical Safety analyzer (ESA-601) and Electrical Surgery analyzer(Model 454A)are used to measure some relative parameters of radio knife. By combining our measuring activity with the problems existing in the daily managements and usage of radio knife,our viewpoints are described in the following four aspects:management rules,electric shock prevention,patient electrode system and output power. An immature scheme about the quality control of radio knife is also put forward.

Objective To determine the expression of Toll-like receptor 5(TLR5) mRNA in the lung tissues of rats with acute lung injury induced by flagellin, and to investigate its potential role in the pathogenesis of the disease. Methods Flagellin was isolated and purified from Escherichia coli ATCC25922, subsequently identified by monoclonal antibody to flagellin. One hundred and eight SD rats were randomly divided into control group (n=36), flagellin challenged 1 group (n=36) and flagellin challenged 2 group (n=36). Rat model of ALI was reproduced by injecting flagellin. The expression of TLR5 mRNA in the lung tissues of rats was determined with in situ hybridization technique at six time points. Blood gas was monitored and pathological changes in the lung was observed at the same time. Result Flagellin was isolated and purified successfully and its molecular weight was approximately 65kD. Flagellin-induced acute lung injury model was successfully reproduced in rats. From 1h after flagellin injection, TLR5 mRNA expression was found to be increased in the lung tissues of rats with flagellin induced acute lung injury, and the expression was on the increase with the elapse of time and increase of the dose of flagellin. The PaO_2 levels in flagellin challenged 1 and 2 groups decreased. Interstitial edema, alveolar edema and inflammatory cells infiltration were also observed in flagellin challenged groups. Conclusion Flagellin can induce ALI in rats; the development of flagellin induced ALI in rats is related with TLR5 expression in the lung tissues of rats.

Objectives:To investigate the safety,feasibility and clinical effects of early EN(EEN) in postoperative patients with esophageal cancer. Methods:On the first postoperative day,40 patients were randomly divided into EEN group and TEN group(traditional enteral nutrition group), 20 patients per group.A series of parameters including plasma protein and lymphocyte count were tested before and after nutritional therapy.The complications,vital signs and resumption of gastrointestinal functions were carefully observed and recorded simultaneously. Results:Neither mortality nor serious morbidity occurred in all patients during the period of study.The concentrations of serum prealbumin and transferrin were significantly elevated after nutritional support in EEN group.The lymphocyte count was also higher in EEN group.The bowel movement resumed significantly earlier in EEN group than in TEN group. Conclusions:Postoperative EEN for esophageal cancer is safe and feasible,not only improving nutritional status and maintaining gastrointestinal function,but also ameliorating immunological function.

BACKGROUND:Repair of extrahepatic biliary tract injury is a difficult problem in the abdominal surgery. Tissue-engineered extrahepatic biliary tract is an ideal selection for this problem. Construction of tissue-engineered extrahepatic biliary tract with excelent performance is a key to related studies. OBJECTIVE:To investigate the biocompatibility of bile duct endothelial cels differentiated by porcine bone marrow mesenchymal stem cels with electrospun nanofibers. METHODS:Porcine bone marrow mesenchymal stem cels were induced toward biliary tract endothelial cels, which were then identified by morphology and RT-PCR. Polylactic-co-glycolic acid (PLGA) nanofiber membranes were prepared by electrospinning. The morphology was determined by scanning electron microscopy and the short-term (2-week)in vitro degradation rate was determined. Adhesion and proliferation of biliary tract endothelial cels on the nanofiber surface was analyzed by calculating the cel adhesion rate and MTT assay, respectively. Cel growth, morphology and distribution on the material surface were observed by fluorescence staining and scanning electron microscopy, respectively. RESULTS AND CONCLUSION: After 4 weeks of directed differentiation of bone marrow mesenchymal stem celsin vitro, cels showed typical morphology of dendritic bile duct endothelial cels and had the expression of CK19. Scanning electron micrographs showed that electrospun materials were continuous nanofibers with diameters between 200 and 500 nm. No significant degradation of the PLGA nanofibers was observed within 2 weeks. Based on the measured cel adhesion rate, MTT assay, fluorescence staining, and scanning electron microscopy, the differentiated cels possessed a good proliferative capacity on PLGA nanofibers. Bone marrow mesenchymal stem cels differentiated into bile duct endothelial cels in vitro. Materials prepared by the electrospinning method had a nanofiber structure, which did not significantly degrade within 2 weeks. Differentiated cels exhibit good biocompatibility with the nanofibers.

Two regression models, based on panel data over the period of 2000-2011, are built and used to analyze what factors determine China's exports of primary and semi-finished products of traditional Chinese medicine to ASEAN. The results indicate that, China GDP, the ratio of ASEAN to China GDP per capita, average export price, the ratio of state-owned assets to total assets, have a significant positive influence on the export volumes of primary products of Chinese medicine. At the same time, RMB appreciation, the ratio of three kinds of foreign-invested assets to total assets, China-ASEAN Early Harvest Program, ASEAN-China Free Trade Area have a significant negative influence. In respect of the export volumes of semi-finished products of Chinese medicine, the significant influential factors are ASEAN GDP and the ratio of ASEAN to China GDP per capita. The former is positive and the latter is negative. In order to optimize the commodity composition of experts, it is needed to increase export volumes of both primary and semi-finished products of Chinese medicine. According to the analysis above, some proposals are put forward, such as, improving the performance of foreign capital, playing an exemplary and leading role in technological innovation by state-owned enterprises, taking advantage of bargaining power of suppliers, increasing outward foreign direct investment.
China ; Commerce ; Drugs, Chinese Herbal ; chemistry ; economics ; Europe, Eastern ; Medicine, Chinese Traditional ; economics ; standards ; Quality Control

Objective To observe the clinical effect of bicyclol combined with polyene phosphatidyl choline in elderly non-alcoholic fatty liver disease (NAFLD).Methods One hundred and twenty elderly patients with NAFLD were divided into 3 groups by block randomization method,40 cases in each group.Therapeutic group was treated by bicyclol combined with polyene phosphatidyl choline; bicyclol group was only treated by bicyclol; and polyene phosphatidyl choline group was only treated by polyene phosphatidyl choline.The blood biochemical indexes,liver ultrasound score and clinical curative effect of 3 groups were compared after treated for 24 weeks.Results The total cholesterol (TC),triglyceride (TG),alanine aminotransferase (ALT),aspartate aminotransferase (AST) and gamma glutamine transferase (GGT) in 3 groups after treatment were lower than those before treatment,and the difference was statistically significant (P ＜ 0.05) ; TC,TG and ALT levels in therapeutic group after treatment were significantly lower than those in bicyclol group and polyene phosphatidyl choline group [(1.36 ± 0.84) mmol/L vs.(2.77 ± 1.27),(2.84 ±1.35) mmol/L; (1.32 ±0.71) mmol/L vs.(1.89 ±0.87),(1.92 ±0.90) mmol/L; (38.26 ± 12.75) U/L vs.(57.83 ± 16.67),(62.07 ± 18.16) U/L],and the difference was statistically significant (P ＜ 0.05).The liver ultrasound score in 3 groups after treatment was significantly decreased compared with that before treatment,and the difference was statistically significant (P ＜ 0.05).Liver ultrasound scores in therapeutic group after treatment were significantly lower than those in bicyclol group and polyene phosphatidyl choline group [(2.08 ± 0.93) scores vs.(3.17 ± 1.14),(3.34 ± 1.07) scores],and the difference was statistically significant (P ＜ 0.05).The total effective rate in therapeutic group was significantly higher than that in bicyclol group and polyene phosphatidyl choline group [85.0％ (34/40) vs.67.5％ (27/40),65.0％ (26/40)],and the difference was statistically significant (P ＜0.05).Conclusions Bicyclol combined with polyene phosphatidyl choline has better clinical effect in elderly patients with NAFLD.It is better than single bicyclol and polyene phosphatidyl choline and worth clinical promotion.