AIM:To investigate the construction of oligonucleotide microarray specialized for pancreatic adenocarcinoma-associated genes and its preliminary application of detecting differential expressed genes in pancreatic cancer.METHODS:Pancreatic cancer related genes were purposely selected,and oligonucleotide microarray was prepared by spotting oligonucleotide probes on glass slides coated with APS-PDC.Labeled cDNA targets for hybridizations were synthesized by reverse transcription from total RNA in the presence of Cy5-dCTP and Cy3-dCTP,respectively.Hybridized microarray was scanned by Agilent laser scanner,and the aquired image was analyzed by Imagene3.0 software.The intensity ratios of Cy3 and Cy5 were calculated.To confirm the expression profiles of these genes,quantitative reverse transcription-PCR (QRT-PCR) was carried out for CDC25B and TUSC3 genes,and β-actin gene was taken as internal control.The product of PCR was quantitated by comparative Ct method.RESULTS:The signal of microarray hybridization was clear,and the images had a lower background and higher signal-noise ratio.In comparison with normal pancreas,twenty -four differentially expressed genes were identified which included seventeen up-regulated and seven down-regulated genes.The results of QRT-PCR demonstrated that the expressions of CDC25B and TUSC3 in pancreatic cancer were up-regulated and down-regulated respectively,which is consistent with microarray results.CONCLUSION:The oligonucleotide microarray specialized for pancreatic cancer is desirable for its specialty and sensitivity,which can simultaneously and parallelly detect multiple pancreatic cancer-associated genes.

Objective To compare the effects of laparoscopic cholecystectomy and laparoscopic common bile duct exploration combined choledochoscopic exploration( method A)and duodenoscopic sphincterotomy combined with laparoscopic cholecystectomy( method B) in treating choledocholithiasis with cholecystohthia-sis. Methods A retrospective study was adopted to analyze by statistical methods comparatively the clinical data of 114 patients, concerning operation time, blood lost, odynolysis rate, conversion rate,calculi residual rate ,complication rate ,hospitalization time and cost, et al. 68 cases were treated by method A,and 72 ca-ses were treated by method B. Results There were statistical differences in calculi residual rate, a conver-sion rate, apart complication rates and hospitalization cost between two groups, but there was no statistical difference in other index. Conclusion The two methods for choledocholithiasis and cholecystohthiasis has advantage and shortcoming respectively. The treatment for patients must be individualized by MRCP/USG, actual state of illness, and so on.

Objective:To explore the correlation between dietary fiber intake and intestinal barrier function in patients with irritable bowel syndrome with diarrhea (IBS-D).Methods:IBS-D patients were recruited from May 2019 to October 2019 at the clinic of gastroenterology department in China-Japan Friendship Hospital and healthy controls (HCs) were recruited by advertisement. Clinical manifestations, psychological status and quality of life were assessed using standardized questionnaires. A food frequency questionnaire was used to assess dietary habits in the preceding year. Serum diamine oxidase (DAO) was measured via ELISA.Results:64 IBS-D patients and 35 HCs were enrolled, with no significant difference in sex ratio, age and BMI between the two groups. Second to health concern, food avoidance was the dominant impacting factor for quality of life in IBS-D patients. The intake frequency of dietary fiber was decreased in IBS-D patients, and the intake frequencies of dietary fiber-rich foods were significantly lower in IBS-D patients ( P < 0.01 for tubers, P = 0.002 for vegetables, P = 0.019 for fruits and P = 0.045 for legumes). On the other hand, the intake frequencies of processed meat ( P < 0.01), greasy food ( P = 0.009), barbecued food ( P = 0.002) and animal offal ( P = 0.003) were significantly higher in IBS-D patients compared with HCs, indicating the increased intake frequency of fat. Multivariate logistic regression showed that tubers might reduce the risk of IBS-D ( OR = 0.409,95% CI: 0.232 to 0.722, P = 0.002). The frequency of abdominal pain was positively associated with the intake frequency of greasy food in IBS-D patients. Serum DAO was measured in 37 IBS-D patients and 27 HCs. IBS-D patients had significantly higher serum DAO than HCs ( 77.0 [55.3, 100.6] μg/L vs 42.5 [28.0, 58.2] μg/L, P < 0.01). Among all the participants with serum DAO test results, the level of DAO was negatively associated with the intake frequencies of tubers, vegetables and fruits while positively associated with the intake frequencies of processed meat and barbecued food. Conclusions:Food avoidance was an important impacting factor for quality of life in IBS-D patients. IBS-D patients might have insufficient dietary fiber intake and excessive fat intake. Tubers could possibly reduce the risk of IBS-D. The decreased intake frequency of dietary fiber might have a role in intestinal barrier dysfunction in IBS-D patients.

Objective To investigate the efficacy and safety of endoscopic radiofrequency ablation on patients with advanced stage unresectable cholangiocarcinoma. Methods Clinical data of 45 cases with unresectable cholangiocarcinoma who underwent endoscopic retrograde cholangiopancreatography from October 2011 to October 2014 were collected. The patients were divided into two groups: the group A included 23 cases undergoing radiofrequency ablation, and the group B included 22 cases without ablation. The occurrence of complications, the postoperative levels of CA19-9 and total bilirubin ( TBIL) in blood plasma, the patency of stents, and survival period were compared between the two groups. Results All of the 45 patients completed treatment, and no perforation, bleeding and bile leakage occurred. In the group A, 2 patients got fever and 5 patients got pancreatitis after operation, and the number in the group B was 3 and 4, respectively. Their symptoms disappeared after suitable treatment. The postoperative pain rate in group A ( 21. 7％, 5/23) was significantly lower than that of group B ( 54. 5％, 12/22,χ2=5. 148, P=0. 023) . At 7th day of post-operation, the levels of CA19-9 in the two groups were 960. 5 ± 362. 7 U/mL and 979. 3 ± 378. 1 U/mL, respectively, and the levels of TBIL were 95. 25±28. 36μmol/L and 98. 75±20. 76μmol/L, respectively, which were not significantly different between the two groups( P>0. 05) , but were significantly decreased compared with the levels of pre-operation ( P<0. 05) . The patency of self-expandable metal stent in group A ( 60. 0％, 6/10) was significantly higher than that of group B ( 10. 0％, 1/10,χ2=5. 495, P=0. 019) 9 months after operation. Kaplan-Meier analysis showed that the median survival time in the two groups had no statistical difference [ 271. 0 days ( 95％CI: 168. 4-373. 4days ) VS 245. 0 days ( 95％CI:200. 3-289. 7 days), χ2=1. 380, P=0. 258]. Conclusion For the patients with advanced unresectable cholangiocarcinoma, endoscopic radiofrequency ablation is able to relieve cancer pain, prolong the patency of stents, and improve the life quality, which deserves clinical applications.