[Objective]To investigate the effect of chondroitinase ABC(ChABC) after spinal cord injury(SCI) in adult rats,and to evaluate the significance of treatment. [Methods]Forty adult Wistar rats were divided into two groups: the control group(group A),the chondroitinase ABC group(group B).The thoracic T10 spinal cord injury model was made by impactor model II manual.After SCI,group B animals received ChABC treatment,while group A animals only received blank saline.The locomotor functions(BBB score) and the neuroelectrophysiological changes(SEP&MEP) of the rats were evaluated.Twelve weeks after SCI,biotinylated dextran amine(BDA) was injected into the cerebral cortex to trace the corticospinal tracts(CST).Then two weeks after the tracing,the animals were killed and the spinal cord frozen sections were made.The tissue sections were processed with Cy3 fluorescence stain,HE stain and anti NF-200 immuohistological stain.The section images were analyzed by Image Pro Plus image analyzing software.All the statistics were performed by SPSS 13.0 software.[Results]At 4 weeks after SCI,group B had obvious higher BBB scores than control group(P

Objective To evaluate the effect of ketamine on the expression of hippocampal microRNA-206 (miR-206) in the mentally depressed rats.Methods Eighty healthy female Sprague-Dawley rats,weighing 200-300 g,aged 2-3 months,were randomly divided into 4 groups (n=20 each) using a random number table:normal control group (C group),ketamine group (K group),depression group (D group) and depression + ketamine group (D+K group).Mental depression was induced by exposing the animal to chronic unpredictable mild stress.At 1 day after successful establishment of the model,ketamine 15 mg/kg was injected intraperitoneally in K and D+K groups,while the equal volume of normal saline was given in C and D groups.Before establishment of thc model,at 7,14,21,28 and 35 days after beginning of establishment of the model,and at 1,3,5 and 7 days after administration,sucrose preference test was performed.Open field test was carried out at 1 day after administration.Forced swimming test was performed at 2 days after administration.Five rats were sacrificed at 6 h after administration,and hippocampal tissues were isolated for determination of the expression of hippocampal miR-206 by quantitative real-time polymerase chain reaction.At 2 days after administration,5 rats were sacrificed,and hippocampal brain-derived neurotrophic factor (BDNF) expression was detected by Western blot.Results Compared with C group,the volume of sucrose intake at 21-35 days after beginning of establishment of the model and at each time point after administration and the score of open field test were significantly decreased,the immobility time in forced swimming test was significantly prolonged,the expression of miR206 was up-regulated,and the expression of BDNF was down-regulated in D group,the immobility time in forced swimming test was shortened,the expression of miR-206 was down-regulated,and the expression of BDNF was up-regulated in group K,and the score of open field test and volume of sucrose intake at 21-35days after beginning of establishment of the model and the score of open field test were significantly decreased in D+K group (P＜0.05).Compared with D group,the volume of sucrose intake at each time point after administration was significantly increased,the immobility time in forced swimming test was shortened,the expression of miR-206 was down-regulated,and the expression of BDNF was up-regulated in D+K group (P＜0.05).Conclusion The mechanism by which ketamine exerts antidepressant effects is related to down-regulation of miR-206 expression and up-regulation of BDNF expression in the hippocampus of rats.

Objective To investigate the effective regimen to treat the hepatitis C virus (HCV) recurrence after orthotopic liver transplantation (OLT). Methods The clinical data of 4 cases of HCV recurrence after OLT were retrospectively analyzed. Of the 4 cases, there were 3 cases of HCV related liver cirrhosis and 1 case of HCV related liver cirrhosis in combination with hepatocellular carcinoma. The immunosuppression regimen as FK506, MMF and corticosteroids was used after OLT. As soon as HCV recurrence was confirmed by liver biopsy during 8 to 12 weeks after OLT, pegylated interferonα-2a (PEG-IFNα-2a) and ribavirin (RIB) were used for 48 weeks. PEG-IFNα-2a was started at a dose of 180 μg per week subcutaneously and RIB at a dose of 1000 mg per day orally, respective-ly. Blood routine, liver and kidney function test, HCV-RNA and transplanted liver biopsy were per-formed when necessary and biochemical response, sustained virologic response and histological re-sponse were tested in due time. Remits All of the 4 cases except for 1 achieved sustained virologic re-sponse and the liver function was as normal as before. The histological activity index was improved significantly for both inflammatory activity and fibrosis according to liver biopsy in 0, 48, 72 week srespectively. Case 4 was given corticosteroids for consecutively 3 days when acute rejection was veri-fied by liver biopsy and the condition improved. None of them stopped treatment or withdrew from them directly. Conclusion The combination of PEG-IFNα-2a and RIB was an effective regimen to treat the HCV recurrence after OLT and the side effects could be overcame easily.

cholesterol 7α-hydroxylase gene ( CYP7A 1 ) plays a key role in the catabolism of cholesterol into bile acids. To investigate whether the A-204C polymorphism in CYP7A1 gene affects the gene expression,using luciferase as the reporter gene, four recombinants were constructed by inserting forward or reverse sequence with A or C allele at the polymorphism site into the promoter-less vector pGL3-basic. The constructs were then transfected into four cell lines and the luciferase activity of each expression vector was examined by dual luciferase reporter gene assay system. The results showed that activities of the forward sequence of both genotypes were higher than that of reverse sequence. Promoter activity of the recombinants with A allele was about one third lower than that with C allele. According to the analysis with TRANSFAC database, there may exist a Zic3 binding site when there is the C allele at -204. Our study indicates that the A-204 C polymorphism in CYP7A1 promoter region decreases its promoter activity and thus represses the gene expression, possibly due to the lack of a potential Zic3 binding site.

Objective To evaluate laparoscopic continuous circulatory hyperthermic intraperitoneal chemotherapy (CHIPC) in the treatment of malignant ascites from peritoneal carcinomatosis.Methods From March 2006 to March 2008, 21 patients of malignant ascites secondary to peritoneal carcinomatosis received CHIPC with three courses of treatment for each patient. The first course was performed in operation room under general anesthesia, the second and third were performed in patients ward or intensive care unit (ICU), NS solution of mitomycin-C and cisplatin was delivered by continuous circulatary perfusion into peritoneal cavity at a rate of 500 ml/min for 90 min with an inflow temperature of 43 degrees C. Results Intraoperative course was uneventful in all cases, and mean operative time was (80 ± 18) min. There was no postoperative deaths and severe complications. After treatment patients KPS KPS (Karnofsky,KPS)grades rose from 10-40, with an average rise of (22.2 ± 2.4) (P ＜ 0.01). After laparoscopic CHIPC, clinical complete regression of ascites and related symptoms was achieved in 19 patients, and partial remission achieved in 2 patients. Follow-up was made to all patients until the death which occurred at post laparoscope-assisted CHIPC 1 - 9 months, with a median survival time of 6 months.Two patients who underwent partial remission suffered from port site seeding and tumor metastasis leading to death after treatment at 1 and 2 months respectively. Conclusions Laparoscopy-assisted CHIPC is effective for the treatment of malignant ascites from inoperable peritoneal carcinomatosis and improves the quality of life of these patients.

Objective To study the clinical features and surgical strategies of thoracic spinal stenosis caused by ossification of posterior longitudinal ligament(OPLL).Methods From January 2004 to March 2009,21 cases of thoracic spinal stenosis casued by OPLL,including 13 males and 8 females,received surgical treatments.Those cases aged from 34 to 71 years,with an average of 51.2 years old.The courses of disease were from 2 to 50 months,averaged 11 months.The lesions located in upper thoracic(T1-T4)for 4 cases,in middle thoracic(T5-T8)for 7 cases,in lower thoracic(T9-T12)for 10 cases.Nine cases were associated with ossification of ligamentum flavum(OLF),and 8 cases combined with cervical OPLL.Eleven cases received laminectomy and 10 cases received anterolateral decompression.Results The operation time was 90 to 240 min for posterior laminectomy with an average of 140 min,and 110 to 360 min for anterolateral decompression with an average of 240 min.All cases had no worse postoperative symptoms,neurological complications,subarachnoid cavity or wound infection.Japanese Orthopaedic Association(JOA)score was 8 to 15 with an average of 9.17±1.63 in 6 months after surgery.Nerve function improvement was excellent for 8 cases,good for 6 cases,fair for 5 cases and poor for 2 cases.The excellent and good rate was 66.7%.JOA score was 8-15,averaged 10.23±1.64,in 12 months after surgery.Nerve function improvement was excellent for 8 cases,good for 7 cases,fair for 4 cases,and poor for 2 cases.The excellent and good rate was 71.4%.Conclusion Thoracic spinal stenosis result from OPLL,which often combine with cervical OPLL and OLF,often show multiple manifestations.Posterior laminectomy and anterolateral decompression are suitable for those conditions.

Objective To establish a rapid,accurate,specific quantitative assay for detecting B.pertussis,and apply to clinical diagnosis.Methods According to the specific sequence of B.pertussis IS481 gene,the primers and the fluorescence probe were designed and synthesized.Then a fluorescence quantitative PCR for detecting B.pertussis was developed.The specificity,sensitivity and reproducibility of the method were evaluated.255 specimens including 225 nasopharyngeal swabs from suspected pertussis patients and 30 normal nasopharyngeal swabs were detected by fluorescence quantitative PCR.Results A rapid specific quantitative method for detecting B.pertussis was established.The standard curve of the method indicated that there was a good linear relationship between the CT value and the template concentration with the correlation coefficient being 0.998.The linear range of the system was from 102 to 108 copies/μl and the minimum was 102 copies.It had a high sensitivity and good specificity.The intra.and inter-assay coefficients of variation were 5.78%-16.7% and 8.25%-14.9% respectively.The fluorescence quantitative PCR identified 41 positive results for specimens from suspected pertussis patients and results of 30 normal specimens were all negative.Conclusions The method can quantitatively detect the B.pertussis rapidly with high sensitivity and specificity,it can be applied to clinical diagnosis.

Objective To evaluate surgical therapies for chronic pancreatitis.Method The clinical data of 229 patients admitted for chronic pancreatitis during March 2009 to November 2013 in our hospital was retrospectively analyzed,different operation method and their clinical outcome were compared.Results Drainage operations or resection operations were made to all these 229 patients according to different types.57 patients underwent longitudinal pancreaticojejunostomy (LPJ procedure).118 patients received local resection of the head of pancreas combined with longitudinal pancreaticojejunostomy (Frey procedure in 105 cases,Berne procedure in 6 cases,Beger procedure in 7 cases).7 patients received pancreaticoduodenectomy,21 patients received distal pancreas resection,26 patients received other procedures.Post-operative pain relief rate was 89.3％,overall morbidity was 19.6％.Conclusions In cases of chronic pancreatitis,different surgical types are adopted according to their individual indications.Operation in accordance with pathological types guarantees clinical outcome.

Objective To compare biliary tract intraductal papillary mucinous neoplasm (BT-IPMN) with intraductal papillary mucinous neoplasm of the pancreas (P-IPMN).Methods From January 2008 to December 2013,eleven (6.0％) cases of BT-IPMNs were retrospectively identified from a total of 182 biliary tract tumors resected in our institution,while 50 cases underwent surgery for P-IPMN.The mean age of the 11 BT-IPMN cases was 57.3 years (range 40 to 74 years).There were 8 men (73.0％).The mean age of the 50 P-IPMN cases was 57.4 years (range 33 to 85 years).There were 34 men (68.0％).The clinical features,radiologic findings,pathology,surgical strategies,and long-term follow up outcomes between the 2 groups of patients were analyzed.Results There was no significant difference between BT-IPMN and P-IPMN in the following aspects:mean age,sex ratios and clinical presentation [including the most common presenting symptom abdominal pain (73.0％ vs.68.0％),and elevated tumor markers (CEA and CA19-9)].The mean tumor size of BT-IPMN was significantly smaller than P-IPMN (1.7 vs.4.1 cm,P ＜ 0.05).Macroscopically visible mucin was detected in all the 11 patients basing on the original surgical reports.The most common abnormal preoperative imaging findings for BT-IPMN were bile duct dilatation (100％) and intraluminal masses (55.0％).Most cases (82.0％) involved the intrahepatic bile duct and hilum.For tumor clearance,we conducted left hepatectomy in most cases (64.0％).Only one patient underwent biopsy and choledochojejunostomy for multiple tumors involving the extrahepatic,right and left bile ducts.BT-IPMN was likely to have a higher risk of malignancy (55.0％ vs.44.0％) and poorer prognosis (median survival,57 vs.63 months),although there was no significant difference (P ＞ 0.05).The patient without tumor resection died of liver failure 22 months after palliative surgery.Conclusions BT-IPMNs are very rare and they had some similarity with P-IPMN.Complete resection of BT-IPMN is associated with good survival.

Objective To study the effect of Xi Yanping injection on electrocardiogram in Beagle dogs.Methods 24 Beagle dogs were divided into negative control group (0 mg/kg), low-dose group (15 mg/kg), middle-dose group (75 mg/kg), high-dose group (250 mg/kg).Each group consist of 3 animals/sex/group, all animals were administrated by intravenous drip at 20 mL/kg once a day.Administration period was 28-days with 14-days recovery phase.Animals LeadⅡelectrocardiogram ( ECG) was measured during quanrantine, administration and recovery phase.The following parameters included heart rate, P -Rinterval, Q -T interval, P, Q, RS wave amplitude and ST and T wave amplitude were determined, serum biochemical parameters were measured to evaluate the effect on main organs.Results All parameters of quarantine period were fell in the normal limit.After the first administration, heart rate decrease was found in low dose group and P-Rinterval prolongation was found in high dose group.No abnormal was found in dose metaphase,end of dose stage and recovery stage.Conclusion Xi Yanping injection had no obvious influence on ECG of Beagle dog.