Objective:To compare the biomechanical effects between oblique Ban-pulling manipulation and lumbar erection-rotation manipulation in sitting position in treating lumbar intervertebral disc herniation (LIDH). Methods:A three-dimensional finite element model of L3-S1 was developed to carry out a comparative study between oblique Ban-pulling manipulation and lumbar erection and rotation manipulation in sitting position. The disc protrusion was assumed to be on the rear left of L4 disc, and the manipulations were performed on the right side. The loading process was simulated by two steps. In the first step, only the compression loading was imposed, and in the second step, both the compression loading and axial rotation moment were imposed. The displacement and stress distribution in L4 disc were investigated. Results:The values of stress and displacement in the second step were lower than those in the first step in each manipulation. The stress and displacement differences between the two steps were respectively 1.79 times and 3.03 times larger in oblique Ban-pulling manipulation than those in lumbar erection-rotation manipulation in sitting position. Conclusion: Oblique Ban-pulling manipulation may result in a better biomechanical effect than lumbar erection-rotation manipulation in sitting position for LIDH.

OBJECTIVESTo investigate the androgen receptor (AR) isoforms expression in human benign and malignant prostatic tissues and LNCaP cells.

METHODSUsing high resolution isoelectric focusing (IEF), the different expression of AR isoforms were demosntrated in human benign and malignant prostatic tissues and LNCaP cells.

RESULTSData were obtained from 41 AR-positive BPH, three prostatic cancer specimens, and LNCaP cells. From these materials, three types of AR isoforms were detected with pI values at 6.5, 6.0 and 5.3. In the case of BPH tissues, 15 (36.5%) specimens expressed all the three types of isoforms at pI 6.5, 6.0 and 5.3, and 10 (24.4%) samples contained isoforms at pI 6.5 and 5.3, five (12.2%) samples indicated isoforms at pI 6.5 and 6.0, four (9.8%) showed the isoforms at pI 6.0 and 5.3. Of all the 41 specimens, two (4.9%) and two (4.9%) as well as three (7.3%) denoted the isoforme at pI 6.5, 6.0 and 5.3 respectively. As for three prostatic cancer specimens, one sample showed all the three types of AR isoforms at pI 6.5, 6.0, 5.3, but another specimen expressed at pI 6.5 and 6.0, and only one failed to indicate any types of isoforms. LNCaP cells expressed all three types of AR isoforms at pI 6.5, 6.0 and 5.3. Binding of 3H-dihydrotestosterone to these three types of isoforms was inhibited by the addition of 100-fold excess of DHT and testosterone. No effect of progesterone, oestradiol and diethylstilboestrol on tritiated hormone binding was observed.

CONCLUSIONSThe expression of AR isoforms is different among various patients and different between BPH and LNCaP cells, though no clear explanation could be induced for this. These results suggest the possibility of explaining effective hormonal therapy to prostatic disease in the future.

Objective To investigate the value of double-balloon endoscopy (DBE) and multi-slice CT enteroclysis (MSCTE) in diagnosis of Crohn's disease (CD) in small intestine. Methods DBE and MSCTE were performed in 71 patients with suspected Crohn's disease in small intestine. The two methods were compared in terms of diagnosis, extents of disease, existance of complications and activity of the disease according to the pathologic findings and the outcome of follow-up. Results The diagnostic yields of DBE and MSCTE were comparable with no significant difference (χ2=2.29, P> 0.05). The positive and negative likelihood ratios were 22.5 and 0. 022 in DBE respectively, and were 1.6 and 0. 240 in MSCTE respectively. The results of DBE was consistent with MSCTE in diagnosis of mild bowel stenosis, but was inconsistent with MSCTE in diagnosis of moderate-severe bowel stenosis (χ2=11.298, P=0.001). The concordance of two methods in diagnosis of disease activity was 95.8%. Conclusions The first choice in diagnosis of small bowel CD is DBE. The combination of two methods will be helpful in diagnosis and evaluation of CD severity.

Objective To up-regulate the expression of Glil gene in periodontal ligament stem cells ( PDLSCs) and to explore the effect of Glil gene on PDLSCs proliferation and osteogenesis differentiation by establishing Glil gene adenovirus vectors. Methods Subcloned Glil to viral backbone vector Adtrack-CMV and transfered the established vector to 293T cells, which was to acquire the virus particles. Trans-fected aim cells,namely PDLSCs,with these virus. Detected its effect on PDLSCs proliferation with CCK-8 assay, and detected the expression of Glil and the bone-related markers ALP and Runx2 through Western blot. Results An adenovirus vector, which were over expressed Glil gene, was successfully constructed and transfected to PDLSCs. Compared with the empty vector group and normal group, the over expressed one had a much slower proliferation rate in CCK-8 assay (P=0. 003). Western blot showed that ALP and Runx2 can be overexpressing os-teogenic differentiated after PDLSCs successfully transfected with the Glil gene. Conclusion Over expressing Glil gene would lead to a much slower proliferation rate in the PDLSCs and an increase of the bone-related markers. It is concluded that Glil can enhance the osteogenic dif-ferentiation capacity in PDLSCs.

Objective To evaluate the molecular mechanism of 11 beta-hydroxysteroid dehydrogenase type 1 (11 β-HSD1)in tumor necrosis factor-α (TNF-α) induced insulin resistance.Methods The optimal concentration and incubation time of TNF-α for treating HepG2 cells were selected.Real-time polymerase chain reaction(PCR)and Western blot analysis were used to explore the effect of TNFα on the mRNA and protein expression levels of 11β-HSD1,glucocorticoid receptor (GR),phosphoenolpyruvate carboxylase(PEPCK)and glucose 6-phosphatase(G6Pase).Glucose(GO) Assay Kit was used to determine the level of gluconeogenesis.Liver/Muscle glycogen assay kit,PAS/Glycogen Stain kit were used to detect glycogen synthesis.The expression of AKT/GSK pathway was analyzed by Western blot analysis.In addition,HepG2 cells were pre-treated with BVT2733,a specific inhibitor of 11β-HSD1,before exposure to TNFα The expression of AKT/GSK pathway,the level of gluconeogenesis and glycogen synthesis were analyzed.Results The expression of 11β-HSD1 was increased along with the increasing concentration of TNF-α,showing a dose-dependent effect.When HepG2 cells treated with the optimal dose of TNF-α 10 μg/L for 24 hours,the levels of GR,gluconeogenesis and gluconeogenesis-related genes PEPCK and G6Pase were increased,while conversely,the levels of phosphorylation of AKT and GSK,and glycogen synthesis were decreased.However,all the above effects induced by TNF-α in HepG2 cells were greatly reversed by BVT2733 pre treatment.Conclusions 11 β-HSD1 participates in TNF-α-induced insulin resistance in HepG2 cells,and BVT2733 could significantly improve insulin sensitivity.

Objective To evaluate left ventricular rotation and torsion and its early recovery after percutaneous coronary intervention (PCI) in patients with coronary heart disease and normal left ventricular ejection fraction (LVEF) using two dimensional speckle tracking echocardiography.Methods Twenty three consecutive patients with coronary heart disease and normal LVEF were divided into group B (with coronary stenosis ＜70％) and group C (with coronary stenosis ＞70％ and with PCI).Along with 11 healthy controls(group A),indices including basal rotation (BR),apical rotation (AR),left ventricular torsion (LVT) and normalized time to peak were compared among groups,correlative analysis was made between LVT and each indices mentioned above,indices of group C before and 24 hours after PCI were compared.Results AR,LVT in group B and C reduced relative to group A (P ＜0.05),meanwhile time to peak of BR in group C shortened relative to other groups.BR,AR and normalized time to peak of BR were correlated to LVT respectively.BR and LVT in group C increased after PCI(P ＜0.05).Conclusions AR was sensitive to ischemia,the reduction of time to peak of BR in group C might be restriction and compensation.Sensitive to early recovery of left ventricular function after reperfusion,BR could be a predictive index of early effect of percutaneous coronary intervention.

Objective To explore the relationship between serum leptin level and the hypothalamuspituitary-gonad ( HPG) axis in female adolescents with anorexia nervosa ( AN). Methods Sixteen newly diagnosed female adolescents with AN in Shanghai and Zhejiang province were investigated, and their serum leptin, FSH, LH and body composition were measured before and after 18 weeks treatment, and their menorrhea cycles were observed. The rhythm of 24 h serum leptin secretion was studied in 4 patients with AN. Twenty-six, healthy females with normal weight and without contraceptive medication were studied as controls. Results (1) All of 16 patients had amenorrhea, 3 primary amenorrhea and 13 secondary amenorrhea. At admission LH in 14 patients and FSH in 12 patients were below the low limit of the normal reference range (1.5 U/L and 4. 6 U/L respectively), and among them 5 patiend had both 15% weight gain and significantly increased serum leptin level (P

Objective:Establish mass-scale purification technology of cell-derived influenza virus. Methods: A microcarrier-based process was used to produce human influenza virus in serum free-adapted Vero cells. The virus was purified in a sequence of downstream processing steps including inactivation, clarification, anion exchange chromatography, affinity chromatography and size-exclusion chromatography. Results: The recovery of HA reached 102%. 95.3% total protein, including 99.77% host cell protein, and 99.99% host cell DNA were removed during downstream processing. Conclusion: Providing a high effective purification technology for cell-derived influenza virus.

Objective To investigate the expression of oncogene survivin,p53 in breast cancer and its ~prognostic significance. Methods The expression of survivin,p53 in breast cancer tissues of 80 cases were detected by immunohistochemistry S-P method, and its correlation with axillary lymph node metastasis and ~5-year disease free survival (DFS) was analysed.Results In breast cancer tissues,survivin gene positive ~expression rate was 68.75%(55/80), p53 gene positive expression rate was 46.25%(37/80), and both had a positive correlation with axillary lymph node metastasis but negative correlation to 5 years DFS(P0.05);survivin and p53 genes expression have positive corrlation(P

Objective To evaluate the diagnostic efficiency of double-balloon enteroscopy in small bowel Crohn’s disease. Methods In sixty five patients with suspected small bowel Crohn's disease double-balloon enteroscopy were performed, and some of them received enteroscopy and enteroclysis, capsule endoscopy as well.Results The first enteroscopy was performed via mouth in 20 of 65 cases, and the lesions were detected in 11 cases (55%), 5 of 9 cases(55.6%) had lesions detected in enteroscopy via anus while nothing was found in mouth route. Among 45 cases examed by enteroscopy firstly via anus, 34 cases had lesions detected (75.6%), 8 of 11 cases(72.7%) had lesions found in following exam via mouth. Totally 58of 65 had lesions detected through enterosocpy examination, the overall diagnostic yield was 89.2%. Twenty four of 46 cases had positive findings with enteroclysis. The diagnosis of Crohn's disease was comfirmed in 14 of 22 patients(63.6%) underwent capsule endoscoy. The diagnosis was finally confirmed by enteroscopy only in 11 patients(78.6%).Conclusion The entire small intestine could be examined by enteroscopy with combination of mouth and anus route. Double-balloon enteroscopy was an ideal diagnostic modality for small bowel Crohn's diseases, which was also valuable in assessment on extent and severity of the disease. Small bowel enteroclysis was a useful screening alternative for selecting procedure route in DBE.