Objective To study the pathologic changes of the gallbladder in rabbits with calculous cholecystitis and the causes of gallstone recurrence after choleystolithotomy. Methods Twenty- four rabbits were randomly divided into four groups:(1) normal control group (n=5);(2) operative control group(n=5);(3) stone-implanted(S-I) group (n=6),and (4)stone- removed(S-R) group(n=8).The human cholesterol gallstones were implanted into the rabbit gallbladder in stone-implanted and stone- removed rabbits,The pathologic change of the gallbladder was observed by light microscopy 3 months before and after cholecystolithotomy. Results (1)The wet weight of gallbladder in the S-R group [ (1.1?0.06)g] was significant higher than that in S-I group [(0.515?0.1)g] (P0.05);(3)Sever chronic cholecystitis was 33.3% in S-I group 87.5% and in S-R group(P

BACKGROUND: The feasibility and the mechanism of human umbilical cord blood mesenchymal stem cel transplantation for the treatment of liver cirrhosis need to be discussed in-depth. OBJECTIVE: To observe the effect of human umbilical cord blood mesenchymal stem cel transplantation through portal vein on the liver function and tissue pathological changes of the rats with liver cirrhosis. METHODS: Carbon tetrachloride was used to prepare rat model of liver cirrhosis. After the success of modeling, the rats in the cel transplantation group received portal vein injection of 1 mL 5-bromo-2-deoxyuridine -labeled human umbilical cord blood mesenchymal stem cells (5×106), the model group was injected with the same volume of PBS; the normal rats received 1 mL human umbilical cord blood mesenchymal stem cel transplantation via the portal vein were as the control group. At 4 weeks after transplantation, the rat tail vein blood and liver tissue were obtained for testing. RESULTS AND CONCLUSION: At 4 weeks after cel transplantation, compared with the model group, levels of serum alanine aminotransferase, aspartate aminotransferase and total bilirubin in the cel transplantation group were significantly decreased, while the albumin level was increased significantly (P < 0.01); the liver cel inflammatory necrosis, steatosis and liver fibrosis were improved significantly (P < 0.05 or P < 0.01). Immunohistochemistry and immunofluorescence staining showed that human umbilical cord blood mesenchymal stem cel colonization could be seen in the rat liver tissues of the cel transplantation group and control group, but the number of 5-bromo-2-deoxyuridine-positive cells in cel transplantation group was significantly larger than that in the control group. Reverse transcription-PCR test result showed that the expressions of cytokeratin 18 and albumin mRNA could be observed in the rat liver tissue of the cel transplantation group, but no expression could be seen in the control group. It is visible that human umbilical cord mesenchymal stem cells can improve liver function and pathological damage of liver cirrhosis rats in a certain extent, which may relate with the intrahepatic homing colonization and hepatocyte-like cel differentiation of the transplanted cells in the liver cirrhosis rats.

Objective To study the expression of nuclear factor-kappaB (NF-κB) and the counts of lymph vessels in laryngeal squarnous cell carcinoma and polyps of vocal cord tissues, and explore their clinicopathologic significance and correlation in the course of laryngeal carcinoma. Methods SP immuno-histochemical method was used to detect the expression of NF-κB and the counts of lymph vessels on the routinely paraffln-embedded sections of the specimens from 50 cases laryngeal squamous cell carcinoma and 10 cases of polyps of vocal cord tissues. Results The positive rate of NF-κB and the counts of lymph ves-sels in laryngeal carcinoma[60. 0% ,( 13.3±3.4)/HP]were significantly higher ( P <0. 05 and P <0. 01respectively) than those in polyps of vocal cord tissues[10.0 % ,(6. 1±3. 8)/HP]. The positive rate of NF-κB and the counts of lymph vessels in well differentiated adenocarcinoma and cases without metastasis were significantly lower( P < 0. 05, P <0. 01 ), compared with poor-differentiated adenoearcinoma and ca-ses with metastasis. The counts of lymph vessels in the NF-κB positive cases were significantly higher than thoseinNF-κBnegativecases[(14.9±4.1)/HPvs (9.8±3.1)/ HP, P <0.01] . Conclusions The expression of NF-κB and the counts of lymph vessels might be important markers to be used to monitor the progression, biological behaviors, metastatic status and prognosis of laryngeal carcinoma. NF-κB might pro-mote lympoangiogenesis in laryngeal squnmous cell carcinoma tissues.

Objective To constuct and identify a specific siRNA targeting mucins (MUC1) expression vector.Methods A pair of oligonucleotide completing and coding hairpin MUC1-siRNA synthesized were inserted into pGC silencerTM U6/Neo/RNAi vector.Double enzyme digestion,PCR test and DNA sequencing were used to identify the recombinant plasmid.Then,special MUC1-siRNA was transfected into cholangiocarcinoma cells with Lipofectamine TM 2000.In vitro,MUC1 mRNA and protein expression was tested by RT-PCR and Western Blot respectively.Results Double enzyme digestion,PCR test and DNA sequencing confirmed that the MUC1 specific siRNA expression vector was constructed successfully.After transfection,the expression of MUC1 mRNA and protein in QBC939 (experimental group) decreased significantly (P

Objective To investigate the application of selective hepatopetal blood occlusion techniques in anatomic hepatectomy.Methods We retrospectively reviewed the clinical data of 259 patients with hepatolithiasis or liver tumor undergoing anatomic hepatectomy under selective hepatopetal blood occlusion from January 2006 to December 2009.Results Totally,183 cases with hepatolithiasis and 76 cases with liver tumor underwent anatomic hepatectomy under selective hepatopetal blood occlusion.The average intra-operation blood loss was 210 mL(120-1 600 mL);post-operation incidence of complications and the rate of residual stones was 10.9% and 4.2%,respectively.Thre was no operative death in this series.The intrahepatic recurrence and metastasis rate of liver tumor was 23.6% and the median recurrence was 16.3 months.Conclusions The use of a appropriate selective hepatopetal blood occlusion during anatomic hepatectomy for hepatolithiasis and liver tumors is an effective measure to reduce surgical complications and improve outcome.

Objective To study the operative procedure for stage III and IV hilar cholangiocarcinoma. Methods A crescent shape excision on the edges of multiple hepatic segments followed by a 'skirt edge′ form hepatoenterostomy to drain the multiple hepatic ducts was used to treat unresectable stage III,IV hilar cholangiocarcinoma, . Results (1)the mean survival time was 15.65 months;(2)the patient comfortable index was 81.5%;(4)there was no operative death in the series. Conclusions The 'skirt edge' form hepatoenterostomy is a feasible and effective palliative method for unresectable stage III,IV cholangiocarcinoma.

Objective To investigate the expression of phosphorylated RB (pRB) in the invasion front of papillary thyroid carcinoma and the clinical pathological implications. Methods Immunohistochemistry was ap-plied in analyzing pRB expression feature and the clinical pathological implications in a total of 82 patients who underwent total or subtotal thyroidectomy and neck lymph node dissection for papillary thyroid carcinoma. Results The displacement of pRB proteins from the nucleus to the cytoplasm was observed in the invasive front of papil-lary thyroid carcinoma , which was an independent predictor of lymph node metastasis in papillary thyroid carci-noma. Conclusion Nuclear-cytoplasmic transport of pRB in the invasive front was an independent predictor of lymph node metastasis in papillary thyroid carcinoma.

Objective To investigate the effect of c-myc ASODN on the proliferation and invasion of human bile duct carcinoma cell line QBC939. Methods QBC939 cells was conventionally cultured. C-myc ASODN was designed and transfected into QBC939 cell line. MTT assay and transwell experiment were used to study cell proliferation and invasion of QBC939 cells. Results MTT assay showed that cell survival rate in ASODN group was significantly lower than that in blank group(P < 0.05). Transwell experiment showed that the num-ber of cells penetrated in ASODN group was significantly lower than that in blank group(P<0.01). The cell survival rate and the number of cells penetrated in vechicle group had no difference with blank comparison group(P>0.05). Conclusions C- myc ASODN can inhibit the proliferation and invasion of QBC939 cells.

Objective To explore the reasons,diagnosis and treatment of residual cholecystitis(RCC) with gallstones. Methods The clinical data of 36 RCC patients with gallstones identified by operation were retrospectively analyzed. Results All the 36 patients were cured by reoperation. Residual cholecystectomy was performed on 8 patients, and residual cholecystecomy plus common bile duct exploration and T tube drainage on 28 patients. Thirty one patients were followed up for 3 months to 12 years,93.55% of the patients had good results. Conclusions The main reason of residual cholecystitis with gallstones was not followed the principle of "identify cut identify" during cholecystectomy .The clinical presentation of RCC is similar to that of cholecystitis with gallstones .The accurate rate of auxiliary examinations is low,so the results of these exammations should be analyzed comprehensivly in the diagnosis. The principle of "identify cut identify" should be followed during the reoperation. The common bile duct and common hepatic duct should be opened first and then the residual gall be resected.

Objective To investigate the protective effect of Calcitonin Gene-related Peptide(CGRP)on ET-1 mediated injury of human hepatocyte.Methods Human liver tissues obtained from patients undergoing partial hepatectomies were randomly divided into five groups:control group,liver perfused with D-Hank's solution group;liver perfused with ET-1 group and three liver perfased with ET plus CGRP(10-6M,10-7M,10-8M)treated groups.Collagenase digestion method was used to isolate human hepatocytes,then hepatocytes were cultured,and the level of MDA and TNF-?,the viability and proliferation of hepatocyte,and the hepatocyte function(ALT,Alb,Urea and LDH)were determined.Results As compared with control group,in ET-1 group,the viability and proliferation of hepatocytes,the level of Alb and Urea declined significantly(P