Objective To observe the imaging features of primary hepatic endocrine carcinoma. Methods Three patients with primary hepatic endocrine carcinoma proven pathologically were retrospectively analyzed. Results Single liver lesion was detected in all 3 patients, 2 in right and 1 in left lobe of liver. The maximum diameter of the masses was 4.8 cm, 6.7 cm and 10.0 cm, respectively. The masses were all solid with different extent of low density. The solid part enhanced greatly in contrast enhanced CT scanning, while the non-solid part did not. The bigger lesions pushed the vascular to move aside in 2 patients. Enhanced and circuitous vascular was observed in 1 lesion. Slightly low signal was noticed on MR T1WI , while high signal was found on T2WI and DWI. Conclusion CT and MR can show specific features of primary hepatic endocrine carcinoma, i.e. usually single solid mass with various low densities inside and the solid part enhancing dramatically.

Objective: To study the effects of static tensile strai n on the secretion of prostaglandin E 2 (PGE 2) of human periodontal ligament fibroblasts (PLFs). Methods: Human PLFs were treated by tensile strain values of 0%,8%,12%,16% and 20% for 24, 48 and 72 h respecti vely with a self-devised loading apparatus in vitro. All samples were rando mly allocated into 15 groups and there were 3 in each group. After treatment cu lture media of the samples were collected and the content of PGE 2 in each medi um sample was determined using RIA ELISA. The data analysis was carried out with SPSS using Dunnett test. Results: In group of 0% the sec retion of PGE 2 by PLFs per day had no relation with loading time; E 2 secre tion increased with the increace of loading time and with the tensile strain va lue in the group of 8%,12% and 16%(P

Objective To investigate the effect of sodium arsenite by Wnt signaling pathway on proliferation and apoptosis of oral squamous cell carcinoma.Methods Cell proliferation was detected after 1.25,2.5,5,10,20μmol/L sodium arsenite treatment human oral squamous cell carcinoma cell line Tca8113 for 24,48,72 hours by CCK8 experiment.0 and 14μmol/L sodium arsenite was used to treatment Tca8113 cells with 48h,cell apoptosis were detected by flow cytometry,Cleaved Caspase3,β-catenin,Cyclin D1 protein expression were detected by Western blot.Tca8113 cells were divided into control group,sodium arsenite group,activating agent+sodium arsenite group,all treated for 48hour,cell proliferation,apoptosis and Cleaved Caspase3,β-catenin,Cyclin D1 protein expression were detected by CCK8 assay,flow cytometry and Western blot.Results Tca8113 cell proliferation was inhibited significantly with the increase of treatment time and sodium arsenite concentration,and has a time and concentration dependent manner(P<0.05 or P<0.01).10μmol/L sodium arsenite as a follow-up study according to the IC50.Cell inhibition rate,apoptosis rate and Cleaved Caspase3 protein expression in 10μmol/L group were significantly higher than that of 0 mol/L group,the expression of β-catenin,Cyclin D1 protein was significantly lower than that of 0 mol/L group(P<0.01).Apoptosis rate,cell inhibition rate and Cleaved Caspase 3 protein expression in sodium arsenite group and activating agent+sodium arsenite group were significantly higher than control group,the expression of β-catenin and Cyclin D1 protein were significantly lower than control group(P<0.01).Apoptosis rate,cell inhibition rate and Cleaved Caspase 3 protein expression in activating agent + sodium arsenite group were significantly lower than that of sodium arsenite group,the expression of β-catenin and Cyclin D1 protein were significantly higher than that of sodium arsenite group(P<0.01).Conclusion Sodium arsenite can inhibit the proliferation of oral squamous cell carcinoma and promote apoptosis,and the mechanism was related to regulation of Wnt signaling pathway.

OBJECTIVE:To study the pharmacokinetics and relative bioavailability of ibuprofen sustained release capsules in healthy volunteers for evaluating the bioequi valency .METHODS: 20 healthy volunteers took a single dose(600mg) of ibuprofen sustained release capsules and fenbid capsules(as reference drug) alternatively, then the plasma concentrations of ibuprofen were determined by HPLC.The pharmacokinetic parameters were calculated with 3p87 pharmacokinetic program and the bioequivalence was calculated .RESULTS: The pharmacokinetic parameters of ibuprofen sustained release capsule and fenbid capsule wereT1/2= (2.88+ 0.25)h, (2.91 + 0.33)h;Cmax = (30.66+ 4.21)mg/L, (29.09+3.54)mg/L;Tmax = (4.4 + 0.52)h, (4.3+0.48)h;AUCo-1, = (174.26+13.95)mg/(h . L), (165.80+ 11.89)mg/(h ?L) ;C = (16.25+ 1.47)mg/L, (15.63+1.83) mg/L; Cmin= (1.36 + 0.56) mg/L, (1.24 + 0.46) mg/ L; FI = (1.83 + 0.07), (1.84 + 0.06) .The relative bioavailability of ibuprofen sustained release capsule was( 105.10 + 7.77) % .CONCLUSION: Ibuprofen sustained release capsule and fenbid (reference drug) were bioequivalent.

OBJECTIVE:To develop a HPLC method for determining the concentration of argine asprine in plasma MET_HODS:The analytical column was YWG C18(4 6mm?250mm,10?m) and kept analyzing at 33℃ The mobile phase consisted of a mixture of purified water-acetonitrile(96∶4,v/v)with 20?l of butylamine and 5?l of acetic acid in per 100ml mobile phase And the plasma sample was extracted with iso-propyol alcohol-chloroform(95∶5,v/v) RESULTS:The calibration curve was linear within the range of 0 97～125 0mg/L plasma concentration and the detective limit was 0 97mg/L The RSDs for inter-day and intra-day in sample of 125 0,31 25,1 95mg/L were less than 10% This method has been used for determining plasma drug concentrations in 8 healthy volunteers and the pharmacokinetic parameters of the drug were obtained CONCLUSION:The method was sensitive,accurate and stable,which is suitable for the study of bioavailibility and pharmacokinetics of argine asprine

Objective To summarize the clinical experience of hepatectomy with hepatic artery resection and reconstruction using gastroduodenal artery during radical resection of hilar cholangiocarcinoma.Methods From Dec.2004 to Dec.2008,nine cases of hilar cholangiocarcinoma with hepatic artery invasion were subjected to radical resection comhined with tumor invaded hepatic artery resection and reconstruction using gastroduodenal artery.The clinical data of these patients were reviewed.Results Nine cases underwent hilar cholangiocarcinoma radical resection with hepatic artery resection,immediate hepatic artery reconstruction using gastroduodenal artery end to end anastomosis while hepatic artery resection exceeding 1 cm.One patient underwent partial resection of the portal vein and repair using autogenous segment of great saphenous vein.Roux-en-Y hepaticojejunostomy was performed in 9 patients with intrahepatic bile duct stents in 8 patients.All patients suffered from postoperative transient SIRS and recovered within 2-3 days after operation.One patient experienced massive bleeding from the upper alimentary tract 3 day after operation and the bleeding was controlled afterwards.The blood flow in the reconstructed hepatic arteries monitored by Doppler was normal two weeks after operation.There was no inhospital mortality.9 patients were followed up for 1-4 years,the median survival time is 23 months (6 months to 32 months).Conclusion Hepatic artery can be reconstructed using gastroduodenal artery during a radical resection of hilar cholangiocarcinoma,and hepatic artery reconstruction decreases the postoperative complications.

Objective The survival and prognosis factors of thoracic esophageal squamous cell carcinoma patients after radical resection was investigated.Methods 1923 patients of thoracic esophageal squamous cell carcinoma after radical resection were included in our study from January 1th 2000 to January 1th 2010 in Zhejiang Cancer Hospital,1 670 male and 253 female.the age in the majority with 40 to 59 years old(1 076/1 923,56.0％).Eighteen prognosis factors were collected.A multivariate analysis of these selected variables was performed using Cox proportional model and prognosis index.We used life table for accumulated survival rate.Results The accumulated survival rate for all patients were 82％,48％ and 35％ in 1 year,3 years and 5 years,respectively.Median survival time was 35.42 months.The significant prognosis factors included body mass index,length of tumor,depth of invasion,differentiation degree,lymph node metastatic degree and region,complication of surgery.Conclusion The prognosis of thoracic esophageal squamous cell carcinoma was affected by multi-factors and prognosis index can predict survival condition.

BACKGROUND:Single photon emission computed tomography (SPECT)measurement is capable of detecting very early cerebral circulatory disorders accurately and assessing the time-window and the possibility of reversible brain function after reperfusion at various post-ischemia time points.OBJECTIVE: To establish the swine model of ischemic stroke, to assess the time-window of reversible ischemia and to evaluate the significance of SPECT cerebral ischemia-perfusion imaging on predicting very early time window.DESIGN: Randomized, controlled and experimental study.SETTING: Neurological department of a municipal hospital.MATERIALS: From January to August 2002, it was completed at the Laboratory Animal Research Center of Qingdao Municipal Hospital. Twelve 4 months old domestic swine (Sus scrofa), males and females and weighing 8-10 kg, were selected and fed with conventional method.INTERVENTIONS: Twelve swine pigs were divided into block group and reperfusion group, 6 in each group. In all the pigs, common carotid artery in one lateral was blocked by a clamp. Animals in block group sacrificed at 2, 4, 5, 6, 8 and 10 hour respectively. In perfusion group, clamps were removed at 2, 4, 5, 6, 8 and 10 hour respectively, and then the animals were killed 24 hours later. Before sacrifice, all the animals underwent SPECT examination, regional cerebral blood flow (rCBF) measurement and CT scan. After sacrifice, 1 mm3 brain tissues were taken from each lobe and were stained by HE staining. Then light microscope and electron microscope were used to study the histological changes.MAIN OUTCOME MEASURES: SPECT and brain CT scan were used to investigate the cytological changes in brain tissues after various length of ischemiaRESULTS: Twelve swine pigs entered the statistical analysis procedure.By using light microscope and electron microscope, it was found that at 5 hour after operation, neurons in operational side were a little swelled, with swelled mitochondria, a mitochondria crests loss and a progressive plasma loss in a few neurons. While in those with clamps removed within 4 hours after turn off, brain tissue structures were mainly restored.CONCLUSION: SPECT is capable of detecting ischemic brain injury immediately. It is proved by histological evidence that a more-than-5-hour ischemia will cause irreversible changes in neurons.

Objects To evaluate the immune protective effect of dexmedetomidine on breast cancer dur-ing perioperative radical mastectomy via sevoflurane inhalation general anesthesia. To explore reasonable anesthet-ic strategyfor breast cancer radical mastectomy. Methods Patients were divided into two groups. Patients in ex-perimental group receivedgeneral anesthesia with dexmedetomidine and sevoflurane. Control group means general anesthesia with sevoflurane only. In both groups, the level of cortisol, IL-6, IL-8 and of TNF-αin serum were measured at 5 time points , 30 minutes before anesthesia , after cutting skin , after surgery , 24 h after surgery and 72 h after surgery. Results The amount of anesthetic used to induce general anesthesia in the experimen-talgroup were lower than that of the control group.There is no obvious difference of cortisol , IL-6, IL-8 and of TNF-αin serumat the time of 30 min before anesthesia between two groups.Concentrations ofseveral markersin-creasedafter anesthesia, of which experimentalgroup were lower than that of the control group. Conclusions Dexmedetomidine could be immunoprotective for patient with breast cancer during perioperative radical mastecto-my via sevoflurane inhalationgeneralanesthesia. This study recommends usingmultiple anestheticdrugs to anes-thetize patients of breast cancer when performing radical mastectomy.

Objective To investigate the effect of gut bacteria under chronic colitis on the progression of hepatoma in mice.Methods 22 hepatitis B virus (HBV) -transgenic mice ( male, 8 weeks) were randomly divided into two groups, one group (n =10) was fed the drinking water containing 2% dextran sodium sulphate(DSS)to induce chronic colitis and the control group(n =12)was fed with normal drinking water.In order to investigate the effect of gut microbes, 7 male HBV-transgenic mice(8 weeks, with no detectable hepatoma under microscopy) were cohoused with 4 mice with hepatoma for 16 weeks.Results No significant liver cell damage was observed in the group of the mice fed with 2% DSS-containing drinking water.By the 22 -week old,9 of the 10 mice(90.0%) fed with 2% DSS-containing drinking water, 2 of the 12 mice(16.7%) fed with normal drinking had hepatoma.Both the hepatoma incidence and the tumor numbers in the group of mice fed with DSS-containing water were significantly higher than that in the controls (P =0.002 and P =0.028respetively).Compared to controls, the bacteria family Prevotella (P =0.022) and Anaeroplasma (P =0.014) reduced significantly in the mice with induced chronic colitis.All the mice (n =7) cohoused with the mice with hepatoma had the liver tumor developed at 24 -week-old.Conclusion Alterations of gut bacteria under chronic colitis may promote the development of liver cancer.