With the transformation of medical model and the construction of the new public system,higher demand on cultivation of professionals in public health is made.To cultivate higher quality professionals of public health,the reformation and practice in preventive medicine education is studied by constructing new course system,reforming the content of courses and teaching method,emphasizing quality education and the cultivation of ability.

Aim To evaluate the efficacy of TFU as a precursor of 5-FU on the growth inhibition of human gastric carcinoma cell lines SGC-7901 and MKN-45.Methods In vitro experiments,cell growth inhibition was measured by MTT assay.The rates were compared in the presence and Absence of liver microsomal enzymes.The morphology of apoptotic cells was detected by observation with a fluorescence microscope after staining by using adridine orange/ethidium bromide solution.DNA fragmentation was analyzed by agarose gel electrophoresis and flow cytometry respectively.Western blot was employed to analyze the expression of Bcl-2 and Bax.The in vivo efficacy of TFU was assessed in nude mice bearing tumours.The specimens were re-moved and the in situ cell apoptosis detection kit was employed for TUNEL staining.Results Growth of SGC-7901 and MKN-45 cells was remarkably suppressed by treatment with TFU in the presence of liver microsomal enzymes in vitro,suggesting that TFU might be converted to 5-FU by the enzymes.Similar treatment of TFU induced apoptosis of the cells,which was deduced from typical apoptotic features such as morphology,the formation of characteristic ladder pattern of DNA migration and the accumulation of sub-G1 phase.Furthermore,a significant inhibition of Bcl-2 expression and the up-regulation of Bax were observed after treatment with TFU in the presence of liver microsomal enzymes.Growth of human gastric carcinoma cells was significantly delayed by oral administration of TFU with low side effects.Apoptosis in xenografts was also observed by means of TUNEL staining method.Conclusion Treatment of TFU in the presence of liver microsomal enzymes could promote the inhibition of gastric carcinoma cell proliferation.TFU might sustain release of 5-FU mediated by liver microsomal enzymes.Low dose of 5-FU might trigger the carcinoma cells apoptosis via regulation of Bax and Bcl-2.

Objective To study the therapeutic value of endoscopy for secondary prophylaxis of esophagogastricvariceal bleeding(EGVB).Methods Records of 117 patients with EGVB who were treated with endoscopic ligation and/or histoacryl injection (n =55) and devascularization (n =62) from August 2006 to September 2014 were reviewed.Rebleeding rate,time of rebleeding,incidence of complication,cumulative survival rate,length of ward stay and mean total costs were compared between two groups.Indices were compared according to Child-Pugh.Results The rebleeding rate in the endoscopic group was higher than that in the surgical group[46.2％(24/52) VS 25.0％(15/60),P=0.019] during a mean follow-up of 32.5 months,especially in Child-Pugh B[60.0％(15/25) VS 22.2％(6/27),P=0.006].But the rebleeding time was similar between two groups(P＞0.05).The rate of complications in endoscopic group was lower than that in surgical group [20.0％ (11/55) VS 32.3％ (20/62),P =0.134].No significant difference in cumulative survival rate was observed between the groups (89.1％ VS 87.1％,P＞0.05).The length of ward stay[(14±9)d VS(23±8) d,P＜0.001] and mean total cost[(54 136.79± 44 836.32) yuan VS (73 601.86± 103 403.74)yuan,P＜0.05] in endoscopic group were significantly less than those in surgical group.Conclusion Therapeutic endoscopy is as effective as secondary prophylaxis of esophagogastric variceal bleeding.Endoscopic treatment leads to higher rebleeding rate,but is advantageous in similar rebleeding time,smaller injury,less complications,shorter length of ward stay and lower costs.

Background:The incidence of ulcerative colitis (UC)in developed countries is higher than that in developing countries,which may be related with westernized lifestyle,especially high animal protein and low complex carbohydrate diet. With the increased high fat and meat intake,synthesis and secretion of bile acid in liver is also increased,which may have an impact on the occurrence of UC. Aims:To investigate the expressions of farnesoid X receptor (FXR)and G protein-coupled bile acid receptor 5 (TGR5)in patients with UC. Methods:Thirty patients with active UC from January 2013 to June 2016 at the Affiliated Jiangning Hospital of Nanjing Medical University were enrolled,and 30 healthy subjects were served as controls. Expressions of FXR and TGR5 were determined by immunohistochemistry. Results:Compared with control group,expression of FXR was significantly decreased in UC patients (4. 63 ± 2. 07 vs. 6. 91 ± 2. 62,P =0. 00),however,no significant difference in expression of TGR5 was found between the two groups (6. 70 ± 2. 90 vs. 6. 11 ± 2. 44,P = 0. 40). Expression of FXR was significantly increased in right hemicolon colitis than in left hemicolon colitis (P < 0. 05). Conclusions:There is a significant decrease in FXR in active UC patients,indicating that FXR may have some role in the pathogenesis of UC,however,TGR5 may have no obvious effect in the pathogenesis of UC.

Objective To compare the efficacy and survival of patients with malignant obstructive jaundice using either endoscopic self-expandable metallic stents or surgery,and to evaluate the compounding factors influencing prognosis.Methods 56 patients with malignant obstructive jaundice treated with endoscopic self-expandable metallic stents (the endoscopic group) were compared with 90 patients who received surgery (the surgery group) during the same study period.Clinical data and survival of the 2 groups of patients were retrospectively analyzed.Results The success rate was 100％ in the endoscopic group.The serum bilirubin,alkaline phosphatase (ALP) and γ-glutamyl transferase (γ-GT) decreased significantly by using either therapeutic endoscopy or surgery (P＜0.01).There was no significant difference between the two groups in the reduction of serum total bilirubin.The mean survival of the endoscopic and surgery groups were 340 d and 795 d respectively.The accumulative survivals of the endoscopic group at 3,6 and 12 months as evaluated by the Kaplan-Meier method were 82.6 ％,61.1％ and 46.6 ％,respectively,and for the surgery group were 97.0％,90.9 ％ and 65.4％ respectively. There was a significant difference in survival between the two groups (P＜0.01).Survival after therapeutic endoscopy was similar to surgery for patients with metastasis and hilar biliary obstruction.Conclusions Self-expandable metallic stents gave similar palliation in the relief of jaundice in patients with malignant biliary obstruction.The stents had no effect on the primary tumor.Therapeutic endoscopy with self-expandable metallic stents is a safe and effective method for the relief of jaundice in patients with obstructive jaundice caused by non-resectable malignant tumors.

AIM: To observe the expression of neuronal Aryl hydrocarbon receptor nuclear translocator 2 (ARNT2) involved in neuronal apoptosis evoked by low K + and to investigate the relationship between ARNT2 and neuronal apoptosis. METHODS: After neuron apoptosis model was established, the changes of mRNA and protein of ARNT2 during apoptosis were investigated by RT-PCR and Western blotting, respectively. Immunofluorescence was analyzed by confocal microscopy to probe the subcellular localization of ARNT2. RESULTS: Induced by low K +, the expression of ARNT2 mRNA was up-regulated obviously at the point of 30 min, and peaks at the point of 1 h. This up-regulated expression lasted for 12 h, and the variation of ARNT2 protein was similar to that of mRNA. The results of immunofluorescence analyzed by confocal microscopy showed that the localization of ARNT2 protein was in the nucleus. CONCLUSION: ARNT2 locate in nuclei of normal cerebellar granule neurons of rat. During the process of apoptosis evoked by low K +, both mRNA and protein of ARNT2 are overexpressed.

Objective To investigate the relationship between heart rate variability ( HRV) and chronic complications in pa-tients with type 2 diabetes mellitus (T2DM).Methods A total of 96 patients with T2DM was given chronic complication assessment . Demographic data were obtained .Diabetic retinopathy , diabetic kidney disease , diabetic peripheral neuropathy ( DPN) , and peripher-al artery disease ( PAD) were diagnosed according to international clinical classification .The parameters of HRV in the patients with diabetes and non-diabetes were examined with24 h Holter recorder .Results The HRV parameters of type 2 diabetic patients were significantly lower than those of non-diabetes ( P <0.05 ) .HRV time domain parameters [ standard deviation of normal RR intervals (SDNN), standard deviation of 5-minute mean RR intervals (SDANN), root mean square difference among successive RR normal in-tervals ( RMSSD) ] were especially impaired in diabetic patients with retinopathy compared to those without retinopathy .HRV parame-ters except low-to-high frequency ratio ( LF/HF) and MNN were lower in diabetic patients with kidney disease than those without kid-ney disease .HRV parameters were no significant difference between patients with or without PAD .Conclusions HRV of diabetic pa-tient is lower.Diabetic retinopathy and kidney disease impact on the HRV .

Objective To explore the effect of functional electrical stimulation combined with treadmill training and botulinum toxin type A injection on foot-drop and strephenopodia among stroke survivors.Methods Sixty-seven stroke survivors with foot-drop and strephenopodia were randomly divided into an electrical stimulation group (n=23),a conventional treatment group (n =22) and a combined treatment group (n =22).All 3 groups received a 400 U injection of BTX-A and electrical stimulation.After 24 hours,the patients in the conventional treatment group received conventional treatment including a brain protection agent,limb function exercises,gait training,balance training and training in the activities of daily living.The patients in the combined treatment group received that conventional treatment,plus functional electrical stimulation and weight loss training on a treadmill.The patients in the electrical stimulation group received functional electrical stimulation treatment supplementing the conventional treatment.Therapeutic effects were evaluated before and after six weeks of treatment using integral electromyography (iEMS) of the anterior tibial muscle and the lateral head of the gastrocnemius muscle,the co-contraction ratio (CR) during ankle dorsiflexion,the modified Ashworth Scale (MAS),the Berg balance scale (BBS),a functional walking score (FAC),and the active range of motion (AROM) of the ankle in dorsiflexion and eversion.Results After the treatment,significant improvement was observed in all three groups in the average iEMS value of the anterior tibial muscle and the lateral head of the gastrocnemius muscle,the CR in ankle dorsiflexion,and in their MAS,BBS,FAC and AROM results.There was no significant difference among the three groups after treatment in their average iEMS values at the lateral head of the gastrocnemius.The average values of the other indicators were,however,significantly better in the combined treatment group than in the other 2 groups.Conclusion Functional electrical stimulation combined with treadmill training and botulinum toxin type A injection can significantly improve foot-drop,strephenopodia and the walking function of stroke survivors.This combined treatment deserves popularization and application in clinical practice.

AIM: To analyze the subcellular localization of Arnt2 in rat cerebellar granule neurons (CGNs). METHODS: Based on the amino acids sequence of Arnt2 (LOCUS:NP_036913), the subcellular localization of Arnt2 in eukaryotic cells and the nuclear export signals (NES) of Arnt2 were predicted in CBS bioinformatics database. The subcellular localization of Arnt2 in rat cerebellar granule neurons was detected by the method of laser scanning confocal microscopy (LSM) analysis. RESULTS: It was predicted that Arnt2 located in nuclei of eukaryotic cells with the most probability, while located in cytoplasmic mitochondria with a slight possibility. A nuclear export signal was found in Arnt2 amino acids sequence, it was identified to be the leucine of No.143 that located in N-terminal of Arnt2 amino acids sequence. Finally, the result of LSM analysis shows nuclear localization of Arnt2 in rat CGNs. CONCLUSION: Arnt2 is located in nuclei of normal rat CGNs, it suggests that Arnt2 has the tendency to translocate into mitochondria after induced by some of inducible factors, for both the possibility of mitochondria localization and NES exist in Arnt2 amino acids sequence.

Objective To evaluate the prophylactic effects of propranolol, propranolol plus endoscopic variceal ligation (EVL) and propranolol plus endoscopic sclerotherapy (EVS), and to determine the most effective combination for secondary prevention of esophageal variceal bleeding.Methods After hemostasis, a total of 78 patients with esophageal variceal bleeding were randomly assigned to receive propranolol (propranolol group), propranolol plus EVL (ligation group) or propranolol plus sclerotherapy (EVS group), with 26 in each group.All patients were followed up for 12 months, and the rates of variceal re-bleeding, mortality, portal hypertensive gastropathy (PHG), re-occurrence of esophageal varices and formation of gastric fundus varices were compared among different groups.Results During the 12-month follow-up, the rate of re-bleeding in EVL group (30.77%) was significantly lower than those of the EVS group (42.31%) or propranolol group (53.85%) (P<0.05).The occurrence of PHG and fundal varices in patients of EVL group was similar to that of propranolol group, which were both lower than that of EVS group (P<0.05), but the re-occurrence of esophageal varices in EVL group was significantly higher than that of EVS group (P<0.05).Conclusion EVL plus propranolol might be the most effective therapy for secondary prophylaxis of esophageal variceal bleeding.