Objective To investigate the role of miR-200b on gemcitabine induced epithelialmesenchymal transition (EMT) in pancreatic cancer cell line MiaPaCa-2.Methods Different concentrations of gemcitabine were used to induce MiaPaCa-2,and the concentration of 50％ cell proliferation inhibited (IC50) was applied to obtain drug-resistant MiaPaCa-2 cells.MiR-200b or nonsense small molecular fragments (negative control,NC) was transfected into MiaPaCa-2 cells by liposomes,then gemcitabine of IC50 was used to induce cells to obtain drug-resistant MiaPaCa-2 cells transfected with miR-200b or NC.The morphological characteristics of MiaPaCa-2 cells were observed by inverted microscope.Invasion of cells were detected by transwell chamber.The expression of miR-200b was measured by using real-time PCR.The expressions of Ecadherin,Vimentin,Zebl,Zeb2 proteins were determined by Western blot.Results After gemcitabine treatment,the cells' size gradually diminished,intercellular junctions decreased,pseudopodium increased,which presented the characteristics of mesenchymal morphology.The invaded cell number increased from (26 ± 3) to (85 ± 6),and the expression of Vimentin Zebl,Zeb2 was increased to (1.87 ± 0.17),(2.57 ±0.21),(5.24 ± 0.83) folds of the parent cells.The expression of miR-200b was decreased to (0.36 ± 0.01)folds of the parent cells,and the expression of E-cadherin was decreased to 0.47 ± 0.05 folds of the parent cells,while the invaded cell number of drug-resistant MiaPaCa-2 transfected with miR-200b was decreased to (42 ± 4),and the expression of Zebl,Zeb2 was decreased to (0.36 ± 0.07),(0.08 ± 0.01) folds of drugresistant MiaPaCa-2 transfected with NC.Conclusions The occurrence of EMT is observed in pancreatic cancer cell line MiaPaCa-2 during gemcitabine induction,and miR-200b down-regulation may be a possible mechanism.

Objective To investigate the clinical features, diagnosis and treatment of malignant pancreatic endocrine tumor. Methods The clinical data of 38 patients with malignant pancreatic endocrine tumor who had been admitted to First Affiliated Hospital of Nanjing Medical University from January 1969 to December 2008 were analyzed retrospectively. Of all patients, 6 were with insulinoma, 23 with pancreatic polypeptide tumor, 4 with glucagonoma and 5 with pancreatic carcinoid. Results All patients except 1 with insulinoma were found with pancreatic lesion by imaging examination. The resection rate was 87% (33/38). Pathological examination found 7 patients with liver metastasis, 5 with lymph node metastasis, 1 with tumor thrombus in vessels and lymphatic vessels, and 28 with local invasion. Twenty-four patients were followed up, and neither recurrence nor metastasis was found except 1 patient with insulinoma who received reoperation for local recurrence and 1 patient with pancreatic carcinoid who received radiofrequency ablation for liver metastasis. Conclusions The diagnosis of pancreatic endocrine tumor mainly depends on imaging examination. The malignancy of pancreatic endocrine tumor is determined after the comprehensive analysis of preoperative imaging findings, intraoperative examination, post-operative pathological examination and the data obtained during follow-up. The malignant pancreatic endocrine tumor should be managed actively by resection because of its relatively low malignancy, high operative resectability and relatively good prognosis.

Objective To investigate the therapeutic effect of ehlorpromazine in rats with acute necrotizing pancreatitis (ANP). Methods 120 healthy female SD rats were randomly divided into three groups: normal control group (NC group, n=30); acute necrotizing pancreatitis group (ANP group, n=45) and chlorpromazine treatment group (CPZ group, n=45). ANP was induced by the injection of 5% sodium taurocholate (1 ml/kg) into pancreatic duct, NC group were injected with same amount of saline. 0.4% chlorpromazine (0.25 ml/100 g) was intraperitoneally administered in CPZ group at 0 h, 24 h, 48 h after ANP was established. Same amount of normal saline was given to ANP group and NC group in the same way and at the same time points. The rats were sacrificed at 24, 48, 72 h after ANP was induced. The blood samples were collected for analysis of serum amylase (AMY), phospholipase A2 (PLA2), interleukin-6 (IL-6). Pancreas was harvested for evaluation of pathologic changes. Results The pathologic changes in ANP group were compatible with pathologic changes of ANP. The pathologic scores in CPZ group was 3.57±0.73 at 72 hours after ANP induced, which was significantly lower than 13.29±1.03 in ANP group. The serum amylase and PLA2 levels in CPZ group at 72 hours after ANP induced were (1658.0±277.0) U/L and ( 12.26±1.40) ng/ml respectively, the corresponding values of ANP group were (3666.7±1233.0) U/L and (16.81±1.13)ng/ml, respectively. The difference was statistically significantly (P＜0.01). The serum IL-6 levels of CPZ group at 24,48 72 hours were (116.27±14.49) pg/ml, (75.35±6.17) pg/ml, (82.75± 8.86) pg/ml respectively, the corresponding values of CPZ group were (160.88±27.19) pg/ml, (111.77± 19.10)pg/ml, (125.51±30.71) pg/ml respectively. There was a significant difference between the two groups (P＜0.01). Conclusions Chlorpromazine may have a therapeutic effect on ANP.

Objective To study the effects of two kinds of vertical partial laryngectomy on laryngeal function,postoperative extubation rate and survival rate of patients with glottic laryngeal carcinoma.Methods From January 2013 to January 2014,one hundred and fifty patients with glottic carcinoma who treated in Huzhou Gospel Hospital were selected.The patients were divided into observation group and control group by random number table method,with 75 cases in each group.The control group used the traditional vertical partial laryngectomy,the observation group was treated with modified vertical partial laryngectomy.The postoperative survival rate,extubation rate,extubation time and complications were observed in the two groups.Results The extubation rate was 100.00% (75/75) in the observation group and 97.33% (73/75) in the control group,the difference was statistically significant between the two groups(χ2 =2.027,P>0.05).The extubation time in the observation group was (11.85 ± 0.49)d,which in the control group was (14.55 ± 0.56) d,the difference was statistically significant between the two groups( t=31.424, P<0.05).There were 67 cases(89.33% ) with grade 0 and 8 cases(10.67% ) with grade 1 in the observation group.The swallowing function of the observation group was stronger than that of the control group( Z=5.238,P<0.05).The 1-year and 2-year survival rates of the two groups were similar(all P>0.05).The 3-year survival rate of the observation group was 97.33% (73/75),which of the control group was only 88.00% (66/75),the differ-ence was statistically significant between the two groups (χ2 =4.807,P<0.05).There was no pharyngeal fistula in both two groups. There were 5 incision infections in the control group, and 1 incision infection in the observation group.There was no statistically significant difference in the incidence rate of complications between the two groups (χ2 =2.778,P>0.05).Conclusion Improved vertical hemilaryngectomy therapy for patients with glottic laryngeal carcinoma can effectively shorten the time of extubation,better preserve swallowing function,improve the long-term survival rate,and the extubation rate and complication rate are similar with the traditional vertical partial laryngectomy.

Objective To summarize the experience in the diagnosis and treatment of solid pseudopapillary tumors of the pancreas. Methods Ten consecutive patients who underwent surgery with pathologically confirmed solid pseudopapillary tumors of the pancreas between October 2005 and December 2008 were retrospectively reviewed. Results All of the 10 patients were female and the median age at diagnosis was 24 years (range, 11 -39 years). Abdominal discomfort or pain were the most common presenting symptoms. 4 patients had palpable abdominal mass at physical examination. The tumors appeared on ultrasonography and/or CT, MRI as solid or cystic masses. The preoperative serum biochemical parameters and tumor markers level were within the normal range. All the patients underwent surgical treatment. The tumors were located in the head/neck (n = 6) or the distal part (n = 4) of the pancreas. The surgical procedures included enucleation (n=3) , distal pancreatectomy (n=3 , two with preservation of the spleen, one combined with splenectomy, distal gastrectomy and partial colectomy) , segmental pancreatectomy with pancreaticojejunostomy (n=3) and pancreaticoduodenectomy (n = 1). Pancreatic fistula (n = 2) was observed postoperatively and resolved with conservative treatment. The median resected tumor size was 5. 9 cm. All patients were alive and remained recurrence and metastasis free after a median followk-up of 19. 2 months (range, 8～42 months). Conclusions Solid pseudopapillary tumor of the pancreas was rare neoplasm occurred predominantly in young women with low malignant potential. Aggressive resection should be attempted and could result in excellent prognosis.

Objective To explore the clinical significance of intraoperative frozen sections for the diagnosis of unexpected gallbladder neoplasm during cholecystectomy for acute cholecystitis.Methods We retrospectively analyzed the clinical data of acute cholecystitis patients who underwent cholecystectomy at the First Affiliated Hospital of Zhengzhou University,from Dec 2012 to Dec 2017.Results In the 1 386 acute cholecystitis patients,19 patients were found to have concurrent gallbladder neoplasm.Surgeons accurately recognized 9 gallbladder neoplasms by general observation alone,including 2 T2 and 2 T3 gallbladder neoplasms,but missed 10 gallbladder neoplasms.At the same time,we found that 3 Tis and 1 T1a gallbladder neoplasms were missed by frozen sections from 10 gallbladder neoplasms diagnosed by definitive histopathological examination.The sensitivity of frozen sections diagnosis was 60％ and the specificity was 100％.Conclusions During cholecystectomy for acute cholecystitis,the accuracy of surgeons' diagnosis with general observation in unexpected gallbladder neoplasm is poor.The accuracy of frozen sections to diagnose advanced gallbladder neoplasm is high,so we advocate frozen sections of every cholecystectomy sample in acute cholecystitis patients.

Objective To analyze the clinical characteristics,diagnosis,treatment and prognostic factors of primary hepatic neuroendocrine tumor (PHNET).Methods To analyze the clinical data of 21 patients with PHNET who were admitted to the First Affiliated Hospital of Zhengzhou University from January 2012 to January 2019.There were 11 males and 10 females,with ages which ranged from 36 to 75 years.Log-rank test was used for single-factor analysis of the relationship between clinical and pathological indicators and prognosis.Cox proportional risk model was used for multi-factor analysis.Results Among the 21 PHNET patients,10 presented with central and upper abdominal pain,3 abdominal pain accompanied by nausea and vomiting,5 abdominal distension,and 3 were asymptomatic.Carbohydrate antigen (CA) 19-9 was elevated in 6 patients and CA125 in 7 patients.Abdominal enhanced CT showed solid liver space occupying lesions.Four patients had solitary and 17 had multiple lesions.The mean diameter was 58 mm.Fourteen patients had lymph node metastasis.Five patients underwent radical hepatectomy,2 transcatheter hepatic arterial chemoembolization + chemotherapy,12 chemotherapy,and 2 supportive treatment.Factors which were associated with prognosis of PHNET patients were surgery,tumor grading,cytokeratin positivity and lymph node metastasis.Multivariate Cox regression analysis showed that inoperability (HR =8.99,95％ CI:1.13-71.80) was an independent risk factor of prognosis of PHNET patients.The prognosis in patients who underwent surgical resection was better.Conclusion Patients with PHNET had no specific clinical manifestations.Surgical resection gave the best results in treatment.As surgical resection affected prognosis,it should be carried out if technically feasible.

Objective This study aimed to evaluate the impact of Intensive Care Unit (ICU)admission on patients with malignant liver tumors after elective major hepatectomy,and to analyze the relevant factors relating to ICU admission.Method 1 044 liver cancer patients who underwent elective hepatectomy were included into this study.Using the length of extubation time (＞ 5 h) and/or treatment time (＞ 24 h) in ICU,the patients were divided into the ICU group and the general group.The age,gender,underlying disease and operative time,intraoperative blood loss,blood transfusion,as well as postoperative complications,mortality,hospital stay and hospitalization costs were compared between the two groups.The relative factors of the ICU group were evaluated using univariate and multivariate analysis.Results Compared to the general group,the mean age (57.4 ± 3.7 vs.53.2 ± 3.2),and the proportions of patients with associated lung diseases (33.7％ vs.10.0％),chronic kidney diseases (9.6％ vs 2.0％),anemia (50.6％ vs.5.3％),as well as the amounts of intraoperative blood loss (816 ml vs.635 ml) and blood transfusion (4.3 U vs.1.4 U) in the ICU group were significantly higher.The differences were significant (P ＜0.05).Furthermore,the ICU group of patients had a significantly longer hospital stay (21.6 days vs.10.1 days,P ＜ 0.05) and more hospital costs (76 751 yuan vs.42 069 yuan,P ＜ 0.05).Multivariate analysis showed that age,blood loss and transfusion were associated with ICU admission.Conclusions It is not necessary to admit every patient with malignant liver tumors to ICU after elective major hepatectomy.ICU admission resulted in prolonged hospital stay and elevated hospital costs.Age (OR =1.077,95％ CI:1.030 ～ 1.127),amount of blood loss (OR =3.211,95％ CI:1.038 ～ 9.929) and blood transfusion (OR =1.330,95％ CI:1.113 ～ 1.589) were associated with ICU admission.There are still many potentially influencing factors which need further studies to determine.