Objective To investigate the effects and mechanisms of prostaglandin E2 receptor subtype 3 (EP3) on transforming growth factor β1 (TGF-β1)-induced mouse mesangial cells damage. Methods Primary mouse mesangial cells were separated and cultured. Three siRNAs were synthesized and transfected into mesangial cells for silencing EP3 by LipofectamineTM 2000 and the best one was chosen. MCs were grouped into: (1)control group; (2)TGF-β1 (10 μg/L) group; (3)NC-siRNA plus TGF-β1 (10 μg/L) group; (4) EP3-siRNA group; (5)EP3-siRNA plus TGF-β1 (10 μg/L). Then the proliferation of MCs was evaluated by CCK-8 assay. The expression of PGE2 and cAMP in cell supernatant were detected by ELISA. The mRNA and protein expression of fibronectin (FN), connective tissue growth factor (CTGF), cyclooxygenase-2 (COX2), membrane-bound prostaglandin E2 synthase 1 (mPGES1) were detected by real - time quantitative PCR and Western blotting. The phosphorylation of p38 MAPK and ERK1/2 was decected by Western blotting. Results Compared with control group, the cell proliferation induced by TGF-β1 was increased (P<0.05), the expression of PGE2 and cAMP were improved, mRNA and protein expression of FN, CTGF, COX2 and mPGES1 were up-regulated (all P<0.05). Compared with TGF-β1 group, the cell proliferation in EP3-siRNA plus TGF-β1 group was reduced, the expression of FN, CTGF, COX2 and mPGES1 mRNA and protein were downregulated (all P<0.05), the phosphorylation of ERK1/2, p38 MAPK were also declined (P<0.05). Conclusion EP3-siRNA may reduce TGF-β1-induced cell damage through upregulating the expression of cAMP, repressing the activity of ERK1/2 and p38 MAPK, inhibiting the expression of COX2 mPGES1 and PGE2 by feedback, then decreased the expression of FN and CTGF.

Objective To observe the expression of aquaporin-1(AQP1)in rats with acute lung injury induced by radiation,and discuss the protection of Tanreqing for rats with acute lung injury.Methods A total of 20 SD healthy rats were randomly assigned into 4 groups,including the comparison group,the radiation group(0.9％ NaCl 0.2ml),the dexamethasne group(5mg/kg)and the Tanreqing group(0.67ml/kg).Strat intraperitoneal injection one day after radiotherapy,the rats were sacrificed after 7 days.The pathological changes of lung tissues were observed by HE stain.AQP1 expressions in lung tissues were detected by immunohistochemistry and RT-PCR test.Results Compared with the radiation group,there was an obvious amelioration in pathological injury of lung tissue in the dexamethasne and Tanreqing groups.AQP1 was increased significantly in comparison group(0.8006±0.05846),but AQP1 was decreased in the radiation group (0.4938±0.03477)(P＜0.05),and AQP1 was increased after the Tanreqing and dexamethasne treatment(0.6492±0.03477,0.6664±0.03251) (P＜0.05).Conclusion Tanreqing may have beneficial effects on radiationinduced lung injury by regulating AQP1 expression in the lungs of rats.

Objective To survey on the prevalence of schistosomiasis among floating population in Zhejiang province. Methods A survey on prevalence of schistosomiasis among floating population was conducted from September to November 2008, and the stratified cluster sampling method was adopted in the survey. Totally 129 villages of 19 counties or districts were selected as survey sites, and 100 samples of migrants aged 6 to 65 from schistosomiasis-endemic areas were taken in each selected village. All selected individuals were surveyed by questionnaire and underwent serum indirect hemagglutination (IHA) test. For individuals with positive serum IHA testing the fecal examination was carried out to detect the eggs by nylon sedimentation method. SPSS 13.0 software was used for data processing. Results The number of migrants in survey sites was 3 357 420, among whom 303 219 were from schistosomiasis-endemic areas (9.03%).The positive rate in serum IHA test was 2.06% (286/13 898), 276 IHA-positives individuals received fecal examination, and 7 cases were positive (2.52%). Based on above data it was estimated that there would be potentially about 33 500 serum IHA-positive cases and 845 egg-positive cases among floating population in Zhejiang province. Conclusion The risk of schistosomiasis transmission still exists in Zhejiang province due to the infected migrants from endemic areas, and a surveillance system and quick response are required for prevention of re-emergence of the disease.

Objective To compare the incidence of adverse reaction,clinical manifestation and serious degree of adverse reaction and the intravenous injection time of the two different drugs,and provide references for the safe dosage of the drugs in clinic.Methods 200 patients from June 2009 to June 2010,who visited department of dermatology because of allergic dermatitis were chosen.They were randomly divided into the sodium thiosulfate group and the calcium gluconate group according to the drugs which were injected intravenouly.And incidence of adverse reaction,clinical manifestation and serious degree of adverse reaction and the intravenous injection time were compared between two groups.Results Compared with the calcium gluconate group,the rate of the adverse reaction of the sodium thiosulfate group is lower,and the average time needed is shorter,in addition,there is no serious adverse reaction during injection.Conclusions Intravenous injection of sodium thiosulfate has the advantage of lower incidence of adverse reaction,shorter time needed,and fewer serious adverse reaction,which is worthy of wide spread.

Objective To investigate the effects of δ-opioid receptor agonist DADLE (D-Ala2-D-Leu5-enkephalin) on the hemodynamics and oxygen metabolism in rats with sepsis. Methods Eighty healthy male SD rats were randomly divided into 4 groups ( n = 20 each) : sham operation group (group S), sepsis group (group SEP) ,DADLE, group and DADLE2, group. Sepsis was induced by cecum ligation and puncture (CLP) in SEP, DADLE,and DADLE2 groups. In DADLE1 and DADLE2 groups, 0.5 mg/ml DADLE 10 mg/kg was injected intraperitoneally (IP) 0.5 h before CLP and immediately after CLP respectively. Mean arterial pressure (MAP), left ventricular systolic pressure (LVSP) and ± dp/dtmax were recorded at 0, 2, 4 and 6 h after CLP (T1-4). Blood samples from left common carotid artery and right external jugular vein were collected at T4 for blood gas analysis. The cardiac index (CI), O2 delivery (DO2), O2 consumption (VO2) and O2 extraction rate (ERO2) were calculated.Results Compared with group S, MAP and LVSP were significantly increased at T2, while decreased at T3,4, and ± dp/dtmax was significantly increased in group SEP, MAP was significantly increased at T2, while decreased at T3,4, LVSP was significantly increased at T2,3, while decreased at T4 , and ± dp/dtmax was significantly increased in DADLE, and DADLE2 groups, and CI, DO2 and VO2 were significantly decreased and ERO2 was increased in SEP, DADLE, and DADLE2 groups (P＜0.05). Compared with group SEP, MAP, LVSP and ± dp/dtmax at T3,4 and CI, DO2 and VO2 were significantly increased, while ERO2 was significantly decreased in DADLE1 and DADLE2 groups (P ＜ 0.05). There was no significant difference in the parameters mentioned above between DADLE1 and DADLE2 groups ( P ＞ 0.05). Conclusion δ-opioid receptor agonist DADLE can obviously improve the hemodynamics and oxygen metabolism in septic rats.

Objective To investigate the dynamic changes and its significance of inflammatory factors in cervical secretions and prior cervical tissues after cervical conical resection.Methods Women who received prior cervical conization during December 2013 and December 2015 in this hospital were selected,then the cervical tissue and secretion were collected regular interval after the conization.The expression of tumor necrosis factor-α(TNF),interleukin 6 (IL-6) and high mobility group protein 1 (HMGB1) were quantitative detected and analyzed.The expression and infiltration of inflammatory cell were detected by HE and immunohistochemical staining.Results The expression of TNF-α,IL-6 and HMGB1 in cervical tissues and secretions increased gradually after priorcervical conization,which reached the peak at 1 to 2 weeks after priorcervical conization,and then gradually decreased,the differences were statistically significant when compared with the preoperative control group (P＜0.05).The inflammatory cell infiltration and the inflammatory response were most severe at 1st week after the conization.The expression of TNF-α,IL 6 and HMGB1 was at 1st week after the conization were significantly higher than that of the 4thweek group.Conclusion The cervical inflammatory were most severe after the prior cervical conization about 1-2weeks,and the hysterectomy should be avoided at this stage.

Objective To analysis the clinical characteristics and the long-term effect of children with acute lymphoblastic leukemia (ALL).Methods From 2005 to 2010,80 newly diagnosed ALL children were enrolled and treated with protocol based on ALL-BFM2002.The five-years overall survival (OS)and event-free survival(EFS) were analyzed by the method of Kaplan-Meier.Results For the 80 patients,male to female ratio is 1.22∶1.The median age was 4.3 years.33 were in standard risk(41.2％),37 were in medium risk(46.3％),and 10 were in high risk(12.5％).22 had white blood cell count ≥20 x 109/L(27.5％).three patients with BCR-ABL translocation(3.8％),one patient with MLL gene rearrangement(1.3％),17 patients with TEL-AML translocation (21.3％).During induction therapy,79 patients (98.8 ％) achieved complete remission(CR).The five-years OS and EFS were (85.9 ± 4.0) ％ and (79.2 ± 4.7) ％ respectively.The five-years EFS:SR group (86.6 ± 6.4) ％,IR group (81.1 ± 6.4) ％,HR group (48.0 ± 16.4) ％.The difference among risk groups was statistically significant(x2 =7.03,P ＜0.05).12 patients relapsed(15.0％),the median time from diagnosis to relapse was 23.5 months.11 patients died (13.8 ％).Conclusion According to stratification by risk factors and risk-adapted therapy,the quality of ALL children's life had improved.

Objective To explore the effects and mechanisms of prostaglandin E2 (PGE2) receptor 1 antagonist (SC-19220) on proliferation,prostaglandin synthase and extracellular regulated protein kinases (ERK) signal pathway induced by transforming growth factor β1(TGF-β1) in glomerular mesangial cells.Methods Mouse glomerular mesangial cells (GMCs) were divided into 5 groups:control group,TGF-β1 (10 μg/L) group,TGF-β1 (10 μg/L) plus SC-19220 group (0.1,0.5,1.0 μmol/L).The proliferation of GMCs was measured by CCK-8.The PGE2 in supernatant was measured by ELISA.The expression of connective tissue growth factor (CTGF),laminin (LN),cyclooxygenase 2(COX2),membrane-bound prostaglandin E2 synthase 1 (mPGES1) protein and mRNA was examined by Westem blotting and real-time quantitative PCR,ERK1/2 or phospho-ERK1/2 was measured by Western blotting as well.Results TGF-β1 induced the proliferation of GMCs and increased the secretion of PGE2.Besides,TGF-β1 significantly up-regulated the expression of CTGF,LN,COX2 and mPGES1 mRNA and protein (P ＜ 0.05),and increased the expression of phospho-ERK1/2 protein (P ＜ 0.05).However,SC-19220 significantly attenuated the changes of above-mentioned parameters and their activities (P ＜ 0.05).All the effects of SC-19220 were in dose-dependent manner.Conclusions SC19220 may reduce TGF-β1-induced cell damage by suppressing the activity of ERK1/2,and feedback inhibition of COX2,mPGES1 and PGE2,thus decreases the expression of LN and CTGF.

There are some problems with this course of medical laboratory special English, such as reference materials, teaching contents, teaching ways, the evaluation forms, etc. The department of medical laboratory of North Sichuan Medical College did exploratory reforms including 1+n teaching mode (one major teacher and several co-operational teachers in discussion section), Flipped classroom and interactive teaching, new formative assessment forms (usual performance combing final shows grade), etc. They used innovative teaching way with the purpose of establishing new teaching way , cultivating abilities of au-tonomous learning and comprehensive application.

Objective To compare the efficacy and safety between local injection of triamcinolone and oral methylprednisolone in preventing esophageal stricture formation after endoscopic submucosal dissection (ESD) in patients with early esophageal cancer.Methods From January 2014 to January 2016,67 patients with early esophageal cancer were enrolled,all of them received ESD and were divided into triamcinolone injection group (22 cases),oral methylprednisolone group (22 cases) and control group (23 cases).Patients of triamcinolone group received injection of triamcinolone at injured mucosal under endoscope immediately after ESD.Patients of oral methylprednisolone group took methylprednisolone 30 mg per day since the third day after ESD,and then dosage reduced 5 mg every other week until drug withdrawal.Patients of control group only received ESD.After operation,gastroendoscopy examination was repeated to evaluate the extent of esophageal stricture.Patients with esophageal stricture were treated with an additional endoscopic balloon dilatation (EBD).The rate of esophageal stricture and the frequency of EBD treatment of the three groups were compared.Chi-square test,Wilcoxon rank sum test and Kruskal-Wallis rank sum test were used for statistical analysis.Results The rates of esophageal stricture of triamcinolone injection group,oral methylprednisolone group and control group were 18.2％ (4/22),13.6％0 (3/22) and 73.9％ (17/23),respectively,and the difference was statistically significant (x2 =22.20,P＜0.01).There was no significant difference in the rates of esophageal stricture between triamcinolone injection group and oral methylprednisolone group (x2 =0.17,P=0.50),but the rate of esophageal stricture in triamcinolone injection group was lower than control group,and the difference was statistically significant (x2 =14.03,P＜0.01);the rate of esophageal stricture in oral rnethylprednisolone group was lower than control group,and the difference was also statistically significant (x2 =16.55,P＜0.01).The median frequency of EBD treatment of triamcinolone injection group,oral methylprednisolone group and control group were 2.1 (range 0 to 4.0),1.6 (range 0 to 3.0) and 6.0 (range 0 to 13.0) times,respectively,and the difference was statistically significant (H =17.80,P ＜ 0.01).There was nosignificant difference in the frequency of EBD treatment between triamcinolone injection group and oralmethylprednisolone group (Z=1.21,P=0.23);but the frequency of EBD treatment in triamcinolone injection group was less than control group,and the difference was statistically significant (Z=4.96,P＜ 0.01);the frequency of EBD treatment in oral methylprednisolone group was less than control group,and the difference was also statistically significant (Z=4.32,P＜0.01).There was no severe adverse effect in the three groups.Conclusions Local injections of triamcinolone and oral methylprednisolone both reduced the rate of esophageal stricture after ESD,and decreased frequency of EBD treatment in patients with esophageal stricture.The two regimens showed equal efficacy and good safety.