Objective To introduce a rapid colormietric assay for survival and proliferation of bacterium and fungi. Methods Colorimetric assay and automatic microplate scanning spectrophotometer were used for assay of survival and proliferation of bacteria and fungi in the present work. Results Close correlation has been found between the A (570?nm) values of the formazan products and the cell concentration of living bacteria and fungi detected.Conclusion The present work has developed an effective, sensitive and convenient assay method for survival and proliferation assay of bacteria and fungi. [

Objective To investigate the effect of cyanidin-3-glucoside extracted from Chinese bayberry on the proliferation. migration and invasion ability of the gastric cancer cell lines MGC803 and SGC7901 in vitro, and explore the possible mechanism of the preventive effects of C3G on tumor metastasis.Methods After treatment by C3G, the growth inhibiting of C3G on MGC803 and SGC7901 was determined by MTF assay, cell migration and invasion ability was evaluated with transwell chamber. Expression of Matrix metalloproteinase 2( MMP-2 )mRNA and protion on cells were analyzed by RT-PCR and Western blot.Results C3G significantly inhibited the proliferation of MGC803 and SGC7901 cells in a concentration and time-dependent manner as measured by MTT method ( P ＜0. 01 ), and the IC50 were: MGC803:24 h IC50 =6. 27 μg/ml;SGC7901:24 h IC50 = 5.42 μg/ml. After the cells were treated with C3G, the migration and invasion ability of MGC803 and SGC7901 cells decreased significantly ( P ＜ 0. 01 ) the number of invasive cells in 24 hours of the negative control MGC803, SGC7901 group was ( 207 ± 9 ) and ( 115 ± 9 ),respectively, while in C3G 10 μg/ml group the number of invasive cells decreased to( 24 ± 5 ) , ( 14 ± 6). In addition, the expression of MMP-2 mRNA and protion decreased abviously ( P ＜ 0. 01 ), all that was in a concentration-dependent manner. Conclusions In vitro, C3G has a concentration- and time-dependent growth inhibiting effect on MGC803 and SGC7901 cells, and may prevent metastasis by affecting migration and invasion ability of tumor cells. This action may be mediated by down-regulation of MMP-2mRNA and protein.

Objective To investigate the effect of cyanidin-3-glucopyranoside extracted from Chinese bayberry on proliferation and apoptosis of human gastric cell line SGC7901.Methods After cocultured with C3G on different concentrations,cell proliferation was determined by MTT assay; morphology of apoptosis were observed by laser confocal microscopy; TUNEL assay was applied to measure the apoptoic rate; The expression of Bcl-2,Bax,Caspase-3,ICAD protein were observed by Western blot assay.Results C3G significantly inhibited the proliferation of SGC7901 cells in a concentration-and timedependent manner as measured by MTT method(P ＜ 0.01).After cells were treated with C3G,the presence of typical morphological changes of apoptosis was confirmed with laser confocal microscopy after Hoechst 33258 fluorescence staining.TUNEL assay indicated that the number of apoptotic cells in C3G-treated group was greater than that in the gastric cancer cells group(P ＜ 0.01).The expression level of Bcl-2 was down-regulated while the expression level of Bax was up-regulated by C3G,the ratio of Bcl-2 protein and Bax protein decreased.C3G may accelerate the activation of procaspase-3 and down-regulate the expression of ICAD(P ＜ 0.01).Conclusions C3G inhibits SGC7901 cell growth and induces apoptosis in a concentraion-and time-dependent manner.This action may be mediated by down-regulating Bcl-2/Bax,resulting in Caspase-3 activition and decreased ICAD protein expression.

Objective To investigate the timing of operation and the selection of surgical procedure for acute biliary pancreatitis.Methods The clinical data of 247 cases of acute biliary pancreatitis were retrospectively analysed.Results Among 10 non-operation patients,4 died;12 patients underwent emergency operation,5 had postoperative complications and 2 patients died after operation.169 patients underwent delayed operation after effective conservative therapy and 1 patient had postoperative complication;56 patients underwent(selective) operation without any postoperative complication or death.Conclusions Early emergency operation should be performed for relief of biliary obstruction in acute biliary obstructive pancreatitis.The patients with acute non-obstructive biliary pancreatitis should undergo conservative therapy at first and then,after(pancreatitis) has been controlled,delayed operation or selective operation to treat the biliary pathologic condition should be performed.

Objective To investigate the therapeutic effect of kansui root on patients with severe acute pancreatitis(SAP). Methods Clinical data of 54 cases of severe acute pancreatitis treated with kansui root(kansui root group) were analyzed and compared with 54 cases of severe acute pancreatitis treated without kansui root (control group).Results The releivng time of abdominal pain was significantly shorter than that in control group( P

Objective To investigate clinical efficacy and prognostic factors of hilar cholangiocarcinoma.Methods The retrospective case-control study was conducted.The clinicopathological data of 322 patients with hilar cholangiocarcinoma who were admitted to the Xiangya Hospital of Central South University between December 2005 and November 2015 were collected.Preoperative staging and classification of tumor and treatment planning were carried out according to the results of laboratory and imaging examinations.Observation indexes:(1) clinical features and results of assisted examinations;(2) treatments and results of pathological examination;(3) followup and survival;(4) prognostic factors analysis:gender,age,preoperative highest total bilirubin (TBil),preoperative carcinoembryonic antigen (CEA),preoperative CA19-9,preoperative CA242,preoperative CA125,treatment methods and TNM staging.The follow-up of outpatient examination and telephone interview was perfornmed to detect patients' survival up to November 2016.Survival curve was drawn using the Kaplan-Meier method.Survival and univariate analyses were done using the Log-rank test,and multivariate analysis was done using the Cox proportional hazard model.Results (1) Clinical features and results of assisted examinations:among the 322 patients,there were 301 patients with a chief complaint of jaundice.Of the 322 patients,the preoperative highest levels of TBil,DBil,ALT and AST in 322 patients were 3.9-785.2 μmol/L,1.6-410.2 μ mol/L,14.8-484.5 U/L and 21.4-539.8 U/L,respectively.Levels of ALP and GGT in 272 patients were 93.8-1 890.0 U/L and 2.0-1 832.8 U/L,respectively.Seventy-seven of 292 patients had an elevated CEA level,272 of 298 patients had an elevated CA19-9 level,153 of 260 patients had an elevated CA242 level and 86 of 260 patients had an elevated CA125 level.According to Bismuth-Corlette type,24 patients were detected in type Ⅰ,115 in type Ⅱ,55 in type Ⅲa,63 in type Ⅲb and 65 in type Ⅳ.(2) Treatments and results of pathological examination:Of the 322 patients,104 patients underwent radical resection,including 79 with hilar bile duct resection (9 combined with vascular resection and reconstruction) and 25 with extended hepatic lobectomy (16 combined with caudate lobectomy),and 218 patients underwent palliative treatments,including 134 with external biliary drainage and 84 with internal biliary drainage.Five patients were dead in the perioperative period,of which 2 died of acute liver failure,1 died of systemic infection and multiple organ failure,1 died of acute renal failure and 1 died of acute suppurative cholangitis,septic shock and disseminated intravascular coagulation.Of 263 patients receiving pathological examination,adenocarcinoma was detected in 253 patients (12 with high-differentiated adenocarcinoma,85 with moderate-differentiated adenocarcinoma,33 with low-differentiated adenocarcinoma and 123 with indefinite differentiation),mucinous adenocarcinoma in 5 patients,cholangiocarcinoma in 3 patients and neuroendocrine carcinoma in 2 patients.TNM staging of 322 patients:stage Ⅰ was detected in 8 patients,stage Ⅱ in 53 patients,stage Ⅲ in 132 patients,stage Ⅳ in 96 patients and indefinite stage in 33 patients.(3) Follow up and survival:among the 322 patients,296 were followed up for 12-132 months,with a median follow-up time of 65 months,including 94 with radical resection and 202 with palliative treatments.Among the 296 patients,the median survival time and 1-,3-,5-year survival rates were 10 months,47.1％,20.2％ and 9.5％,respectively.0f296 patients with follow-up,median survival time and 1-,3-,5-year survival rates were 31 months,84.0％,46.2％,25.0％ in 94 patients receiving radical resection and 7 months,29.9％,8.1％ and 2.3％ in 202 patients receiving palliative treatment,respectively,with a statistically significant difference between the 2 groups (x2=78.777,P＜ 0.05).Among the 94 patients receiving follow-up and radical resection,the median survival time and 1-,3-,5-year survival rates were 31 months,82.1％,45.1％,25.7％ in 73 patients undergoing hilar bile duct resection and 35 months,90.5％,49.8％,22.1％ in 21 patients undergoing hepatic lobectomy,respectively,with no statistically significant difference (x2=0.186,P＞0.05).Among the 73 patients undergoing hilar bile duct resection,median survival time and 1-,3-,5-year survival rates were 16 months,57.1％,0,0 in 7 patients combined with vascular resection and reconstruction and 34 months,84.6％,49.5％,27.5％ in 66 patients undergoing simplex hilar bile duct resection,respectively,showing a statistically significant difference (x2 =11.977,P＜ 0.05).(4) Prognostic factors analysis:results of univariate analysis showed that preoperative highest TBil,preoperative CEA,preoperative CA242,preoperative CA125,treatment methods and TNM staging were related factors affecting prognosis of patients with hilar cholangiocarcinoma (x2=25.009,18.671,9.359,33.628,94.729,77.136,P＜0.05).Multivariate analysis showed that preoperative highest TBil ≥ 342.0 μmol/L,preoperative CEA ≥ 5.00 μg/L,palliative treatments,TNM stage Ⅲ and Ⅳ were the independent risk factors affecting the poor prognosis of patients with hilar cholangiocarcinoma (HR =2.270,2.147,3.166,2.351,95％ confidence interval:1.587-3.247,1.446-3.188,2.117-4.734,1.489-3.712,P＜0.05).Conclusions Prognosis of hilar cholangiocarcinoma is still unsatisfactory.The R0 resection is the key in radical surgery.Preoperative highest TBil≥342.0 μmol/L,preoperative CEA ≥ 5.00 μg/L,palliative treatments,TNM stage Ⅲ-Ⅳ are independent risk factors affecting the poor prognosis of patients with hilar cholangiocarcinoma.

In order to meet the needs of social development for public health talents and optimize the curriculum system and teaching content of preventive medicine, the course of "Health Emergency" should be set up. It integrates the related content in many courses, and there are 20 hours for theory and 18 hours for experiment or practice. The course takes the emergency response as the cutting point focuses on the projects with high demand of the industry improves the platform and expands the content of emergency skill training through the extracurricular activities and special lectures. Combining theory with practice, this paper explores teaching reform measures that are conducive to improving students' core competence in public health.