Objective:Establishing the hepatic stem cell(WB-F344)line that expresses human interleukin-2 stably and effectively.Methods: We constructed the retroviral vector Plpcx-il-2 containing human interleukin-2 gene, and transfected it into PT67 packaging cells.The infectious viruses were used to infect the hepatic stem cell WB-F344,then the puromycin resistant clones were acquired after puromycin selection.The expression of IL-2 was detected using RT-PCR,immunocytochemistry, Western blot and indirect immunofluorescence, respectively.Results: The retroviral vector containing human IL-2 gene was constructed.The titer of virus in the supernatant reached 10~5 CFU/ml after transfecting PT67 packeting cells.The puromycin resistant clones were acquired after infection of WB-F344 and the cell line WB-F344/Plpcx-IL-2 expressing human interleukin-2 stably was established.Conclusion: By retroviral-mediated transfecting human interleukin-2 gene, the hepatic stem cell stably and effectively expressing interleukin-2 are obtained.This provides a good basis for further research on immuno-gene therapy of liver cancer.

BACKGROUND:With the rapid development of technology, most interbody fusion cages have been applied in clinic, but some are stil in experimental stage. Al fusion cages hold their own distinct characteristics as wel as advantages and shortcomings. OBJECTIVE:To clarify the development course of interbody fusion cages and analyze their types in detail, thereby paving ways for its improvement. METHODS:A computer-based search for literatures in CNKI and PubMed databases published from January 1989 to March 2016 was performed using the keywords of“interbody fusion cage, PEEK, TMC”in English and Chinese, respectively. A total of 106 articles were retrieved and 38 articles were in accordance with the inclusion criteria. RESULTS AND CONCLUSION:Intervertebral fusion is a major method to treat spinal degenerative diseases. There are a variety of fusion cages in clinic, such as pyramesh, polyetheretherketone and absobable fusion cages. Implants used for fusion cages include autogenous, al ogenic and artificial bones as wel as bone morphogenetic protein. We introduce the development process of fusion cages in detail, emphasize the commonly used fusion cages and analyze its development in future. In the end, we give our opinions about the development of intervertebral fusion cages.

[Objective]To study the pathogenesis,clinical manifestation and surgical treatment of the posterior margin separation of lumbar vertebral epiphysis.[Method]Sixteen patients suffering from the posterior margin separation of lumbar vertebral epiphysis were followed up.The clinical manifestation and radiologic examination were analyzed and results of surgical treatment were evaluated.[Result]The patients were usually young and manifested with the sign and symptom of lumbar disc herniation and/or lumbar stenosis.CT was helpful for the accurate diagnosis of this disease.The different surgical measures were taken for the treatment according to the type and range of protrusion.[Conclusion]The posterior margin separation of lumbar vertebral epiphysis were divided into three types:end plate separation and moving into posterior margin,Schmorl node and avulsion fracture.The good results can be obtained with surgery.

Objective To summarize our experience in the prevention and treatment of right accessory hepatic duct and right hepatic duct injury during laparoscopic cholecystectomy. Methods The clinical data of 21 cases with right accessory hepatic duct or right hepatic duct during laparoscopic cholecystectomy were reviewed retrospectively. Result According to anatomy identified by preoperative work-up and selective cholangiography during the operation, 18 cases had the right accessory hepatic duct,eleven of them were confirmed intraoperatively. The accessory hepatic ducts were conserved in 3 cases and clipped without biliary leaks postoperativly in 7 cases; One case had biliary leaks postoperatively with the duct sutured intraoperatively, and recovered well conservative therapy. Accessory hepatic ducts were accidentally injuried in 7 cases, two patients were transferred to open surgery; three cases were confirmed to be injuried and clipped by second laparoscopic exploration because of biliary leaks postoperatively. Three cases had a low confluence of the right and left hepatic duct with the gallbladder duct joining the right bile duct, the ducts were conserved in 2 cases and injuried in one. Postoperatively all these 21 cases were followed up for 2 years, without jaundice or liver dysfunction. Conclusions To prevent injury of right accessory hepatic duct and right hepatic duct. High vigilance and familiarity with the anatomic variants of the biliary tree and intraoperative cholangiography in selective cases are fundmental.

Objective To investigate the expression and clinical significance of mammalian sterile 20-like kinase 1 (MST1) in cervical cancer. Methods Immunohistochemical method was applied to detect the expression level of MST1 protein in specimens of cervical cancer tissues (n=139) and pericarcinomatous tissues (n=20, with≥4 cm distance from the primary tumor's edge). Western blot assay and qPCR were used to detect the protein and mRNA transcription expression levels of MST1 in 20 pairs of cervical cancer tissues and pericarcinomatous tissues, respectively. The correlation between MST1 expression, clinic pathological features and the prognosis were analyzed. Results MST1 was mainly expressed in cytoplasm. The positive expression rate of MST1 was significantly lower in cervical cancer tissues (27%, 38/139) than that in pericarcinomatous tissues (80%, 16/20,χ2=21.62, P<0.01). The expressions levels of MST1 protein and mRNA were both lower in the cervical cancer tissues (P<0.01). In cervical cancer, the positive expression rate of MST1 inⅠb+Ⅱa stage was higher than that ofⅡb+Ⅳstage (P<0.05), the positive expression rate of MST1 in lymph node metastasis was lower than that of without lymph node metastasis (P < 0.05). Values of age, tumor size, histological type and differentiation degree showed no significant difference to positive expression rate of MST1. Moreover, the negative expression of MST1 displayed a significantly poorer overall survival time than that of positive expression of MST1 (Log-rank χ2=28.35, P < 0.01). Conclusion MST1 shows a lower expression in cervical cancer, which may be a new target for clinical treatment and prognosis of cervical cancer.

Objective To investigate the clinical effects of pars repair by the pedicle screws,laminal hooks and auto iliac bone graft through the Wiltse approach via Quadrant channel for the treatment of the adolescent spodylolysis.Methods From November 2007 to April 2011,pars defects of 11 patients (10 males and 1 female) were repaired with pedicle screws,laminal hooks and auto iliac bone graft via Quadrant channel through the Wiltse approach.The mean age of 11 patients was 17.3 years (range 15-19).Mean course was 9.9 months (range 6-14 months).All patients have bilateral pars defect of L5.There was no poroma across the pars that have been proved by X-ray film and 3-D CT before the operation.There were 4 patients with Ⅰ grade spondylolisthesis.The degeneration of the intervertebral disc assessed by Pfirrmann grade of all patients was no more than Ⅰ grade.Visual analogue scale (VAS) and Oswestry disability index (ODI) were compared before and after operation.The fusion of pars defect was observed by X-ray film and 3-D CT.Results The mean operation time was 85.5±12.3 min (range 70-110 min); intraoperatve blood loss was 80-150 ml (mean 105 ± 19.4 ml).Two patients were lost in follow-up after operation and the others had been followed up for 12 to 24 months (mean 16 months).All patients had significant pain relief and function recovery after operation.Mean postoperative VAS score was 1.5± 1.0 compared with 4.5± 1.0 of preoperation (t=4.603,P=0.002).ODI was decreased from 49.3％± 14.2％ of preoperation to 12.0％±4.9％ of the last follow-up (t=7.344,P=0.000).With the Macnab grades,7 patients are excellent,2 patients are good.3-D CT showed that all pars defect were fused in the last follow-up.Conclusion Pars repair by the pedicle screws,laminal hooks and auto iliac bone graft through the Wiltse approach via Quadrant channel can protect the paravertebral muscle,relief patients from pain,and improve function.

Objective To analyze risk factor of bile duct injury (BDI) during laparoscopic cholecystectomy (LC). Methods A retrospective population-based cohort study was carried out on 13878 patients undergoing LC from Apr 1994 to Dec 2003. Patients were divided into BDI group and non-BDI group. Factors with statistically significant differences between groups in anivariable analysis were selected to construct a multivariate logistic regression mode. Result Among 13878 LC procedures 38 BDI (0.27%) were identified. Factors which were of significant differences between groups in anivariable analysis includ diameter of common bile duct(?~2=5.92, P

By detection and analysis of neuro-information from amputee in experiments, a research on the correlations of three main nerves (median nerve, radial nerve and ulnar nerve), on the patterns for discharging information, and on the mechanics about how neuro-information dominates movements was performed. These researches would contribute to the development of neuroprosthesis.
Adult ; Amputation ; Amputees ; Arm ; Artificial Limbs ; Humans ; Male ; Median Nerve ; physiology ; Microelectrodes ; Movement ; physiology ; Radial Nerve ; physiology ; Ulnar Nerve ; physiology

With the rapid development of liver surgery,minimally invasive techniques have been widely used in liver surgery. Many challenging liver can be performed laparoscopically to decrease the surgical trauma. At the same time,the efficiency and accuracy of liver surgeries have been highly improved by the advanced assisted technology of liver surgery. The purpose of this article is to summarize the current situation of liver surgery as well as the future of liver surgery.

Anaphylaxis ; diagnosis ; etiology ; Catheterization, Central Venous ; adverse effects ; Central Venous Catheters ; adverse effects ; microbiology ; Chlorhexidine ; chemistry ; therapeutic use ; Humans ; Male ; Middle Aged ; Sulfadiazine ; chemistry ; therapeutic use