Objective: To express and purify transforming growth factor ?(TGF?)-pseudomonas exotoxin 40 and investigate its cytotoxic effect on cancer cells overexpressing epidermal growth factor (EGF) receptor. Methods: Recombi nant plasmid pV28 was constructed by inserting the gene coding TGF?-PE40 into the vector pET28a Expression of fusion protein was conducted using the host BL21. Production of the recombinant protein was induced by IPTG, following extraction and purification of inclusion bodies with His-tag purification system. Cell viability assay (by MTT) was performed to determine the cytotoxic effect of TGF?-PE40 on cancer cells ( A431 and SK-OV3). Results: Recombinant plasmid pV28, which expresses TGF?-PE40, was constructed successfully. Purity of TGF?-PE40 was about 98% after a purification procedure using His-tag column. Cytotoxic experiment showed that at a concentration of 0. 86?0. 07 UUUUg/ml, TGF?-PE40 could reduce 50% viability of A431, which has high expression of EGFR. Whereas the IC50 for ovarian cancer cell SK OV3, which expresses less EGFR, was 6.37?2.18 ?g/ml. There was a significant difference between these two groups (P

Objective To study the effect of sodium hyaluronate on the expression of transforming growth factor-β3(TGF-β3) and Smad 6 of the epidural scar tissue. Method Totally 60 male SD rats were randomly divided into two groups:the control group(A, n = 30), sodium hyaluronate group(B, n = 30). 0.25 × 1 cm2 dura mater uncovered area laminectomy was performed at L4 and L5, covered with 0.3 ml sodium hyaluronate in group B, covered with same amount of saline in group A. The animals were sacrificed at 2, 4 and 8 weeks after operation. The specimens were prepared for determination of the expression of TGF-β3 and Smad 6 at scar tissue and the degree of scar adhesion according to Rydell method, and observed the ultrastructure changes of scar tissue with transmission electron microscope. Results At 2 weeks after operation, the expression of TGF-β3 mRNA of two groups were 0.22 and 0.257 ( P = 0.027), respectively. At 4 weeks, group B was was increased significantly, and the mean numbers were 0.362 and 0.411 (P = 0.006). At 8 weeks, the expression of TGF-β3 mRNA of group A was increased significantly, too, but the difference between two groups was significantly, they were 0.427 and 0.470 (P =0.015), respectively. The trend of the expression of TGF-β3 and Smad 6 mRNA was similar. At 2, 4, 8, weeks, the expression was 0.169 and 0.205 (P = 0.089), 0.294 and 0.351 (P = 0.031), and 0.469 and 0.543 (P = 0.021), respectively.In group B the duramater adhesion was decreased (P ＜ 0.05), the proliferation of fibroblasts and fihroblastic function were inhibited (P ＜ 0.05). Conclusions Sodium hyaluronate up-regulated the expression of TGF-β3 and Smad6 and reduced the proliferation and collagen synthesis in fibroblast culture in the scar tissue.

Objective To evaluate the clinical and imaging features of the sellar region lesions in children.Methods The clinical and imaging features of 112 cases with sellar region lesions were analyzed retrospectively,which were confirmed by pathology.Results 37 cases were craniopharyngiomas, which had two main symptoms of intracranial hypertension(57%)and diabetes insipidus(11%).On imaging it demonstrated as a calcified cystic tumor(81%).18 cases were gliomas, the main clinical feature of which was decreased visual acuity,13 of them were pilocytic astrocytoma, which manifested as a solid tumor with significantly enhancement(94%).16 cases were germ cell tumors,the main complaint was diabetes insipidus (75%),13 of them were germinoma, which showed iso-high density on CT and moderate enhancement after administration of contrast.And it showed high signal intensity on DWI.7 cases were hamartoma,86% patients of which showed gelasmus epilepsy,the imaging showed iso-signal masses with no enhacement in the hypothalamic papillary region.5 cases were LCH,80% of which had the complaint of diabetes insipidus,imaging findings manifested as thinkened pituitary stalk and loss of hyperintensity of posterior pituitary on T1WI.3 cases were pituitary tumors.23 cases were Rathke's cleft cysts,3 cases were arachnoid cyst.Most of the patients presented with headache.Conclusion The clinical and imaging features shows some specific features, which is helpful to improve the correct rate of diagnosis and provide the basis for further treatment.

Objective To investigate students' view about the laboratory medicine curriculum and teaching reform,and to provide reference for further reform and development. Methods The students specialized in laboratory medicine in School of Medicine,Shanghai Jiaotong University were involved in the survey.Questionnaires were answered and analyzed.The research method of expert consultation was adopted. Results Students had some different opinions for course content,structure and so on,and they expected more clinical practice,more hands operation,and more teachers' guidance.Conclusion To train laboratory technicians,it was necessary to build a reasonable system of professional courses and train practical talents.

Adult ; Female ; Humans ; Kidney ; pathology ; Kidney Neoplasms ; pathology

Objective To develop the hypothesis ‘saturated or non-saturated cytotoxicity model' and explain the various phenomena of antibody mediated immunoresponses in recipients,including rejection and accommodation.Methods The imitating complement dependent cytotoxicity.The threshold set to identify as saturated or non-saturated cytotoxicity depends on antigen-antibody complex(R)whether or not above lethal number(D)in effective time.Feasibility of the hypothesis was examined through explaining various phenomena mediated by anti-donor antibodies,especially some contradictory phenomena.Results Hyperacute rejection,accelerated rejection and acute rejection could be well explained by saturated cytotoxicity.Accommodation of ABO imcompatible transplantion,de novo antibody induced injury,change of protein profile,and C4d deposition in graft could be well elucidated by the hypothesis.Conclusion The hypothesis saturated or nonsaturated cytotoxicity model' help to interpret and interconnect various phenomena of antibodies mediated immune response,such as rejection and accommodation.

Three weeks’ training, visiting and demonstrating classes in Michigan State University gave us an opportunity to understand the education system, the teaching characteristics and the “students centered”teaching principle of USA. Some reasonable teaching methods were applied in the class which may embody the student-oriented teaching aim and develop the students’ subjective initiative. The teaching effect showed that most students were fond of the teaching strategies and they also did good job in final tests.

BACKGROUND:The Y-shaped mesh graft material weaved using lightweight polypropylen has the appropriate porosity, which not only can make the vaginal tissues grow and fuse rapidly on the mesh, but also can maintain good biological strength to ensure the fixed strength for the presacral suspension. OBJECTIVE:To retrospectively analyze the clinical effect of Y-shaped mesh for the biological function reconstruction of the female pelvic floor. METHODS:Ten female cases of pelvic floor dysfunction were enrol ed, aged 37-73 years, and al were given the treatment of sacral colposuspension under laparoscopy. Then perioperative complications were recorded;patients were fol owed up regularly to record the Pelvic Organ Prolapse Quantification (POP-Q) score at different time points;and the subjective satisfaction was investigated using the Pelvic Floor Impact Questionnaire (PFIQ-7). RESULTS AND CONCLUSION:After at least 6-month fol ow-up, no postoperative pelvic infection, nerve damage and complications appeared, the patients healed wel , and no mesh erosion, infection and other adverse reactions occurred. The POP-Q and PFIQ-7 scores at 1, 3 and 6 months after repair were significantly improved than those before repair (P<0.05). These results suggest that the Y-shaped biological mesh repairing female midpelvic floor dysfunction has good biocompatibility, and can restore the anatomy of the pelvic floor.

Objective:To study the effects of obesity induced by high-fat diet on T lymphocyte subsets in the adipose tissue in mice.Methods:C57BL/6 male mice were randomly divided into 2 groups, the normal control group and high-fat diet group.After feeding 16 weeks, serum was separated and CHOL, TG, HDL, LDL and glucose levels were measured by automatic biochemical analyzer.The concentrations of TNF-αwere determined by ELISA kit.FACS was used to analyze the number of T cells and the percentage of subgroup in epididymal fat adipose tissue.Results:Compared with control group,body weight,weight gain,epididymal fat pad weight,perirenal fat weight,blood lipids,glucose and TNF-αwere significantly increased in high-fat diet group,but there were no difference in the thymus index and spleen index between the two groups.Compared with the control group,the mice fed a high-fat diet had increasing proportion of CD3+T cells,CD4+T cells and CD8+T cells in adipose tissue and there was a significant increase on the proportion of Th1 and Th17 sublineage in the HFD group.Conclusion:High-fat diet induced obesity can lead to the increasing proportion of CD3+T cells,CD4+T cells and CD8+T cells in epididymal fat pads and generate a progressive Th1 and Th17 bias.

AIM: To detect the expression of cytoplasmic inhibitor of apoptosis protein 2 (c-IAP2) and growth arrest-specific gene 1 (GAS1) in Hodgkin's lymphoma (HL) and anaplastic large cell lymphoma (ALCL) and to investigate the role of two genes in the pathogenesis of HL and ALCL.METHODS: HE staining,the antibodies CD30,CD15,CD45RO and CD20 were used to screen the cases of HL and ALCL from 288 cases of lymphoma. The clarified HL and ALCL were subjected for immunohistochemical staining by SP and ABC methods to analyze the expression of c-IAP2 and GAS1. RESULTS: ①The positive rate of c-IAP2 in HL was 25/26(96.1%) while that in ALCL was 6/19(31.6%),there presented statistic significance between HL and ALCL groups( P