0.05; at 14 d,28 d, the thickness and area of the intiam in group S were smaller than those in group NS,P

Objective To investigate the effect of non-restrictive external stent on both cell proliferation of rabbit vein grafts and prevention from hyperplasia of the grafts' neointima. Methods 36 New Zealand white rabbits were randomly divided into two groups, each animal was subjected to a reversed autologous venous graft between external jugular vein and common carotid artery. In stenting group (group S), the vein grafts were surrounded by a 6 mm in diameter non-restrictive stent, and in non-stenting group (group NS), there is no stent to support the vein grafts. The grafts were harvested 1 week (1W), 2 weeks (2W) and 4 weeks (4W) after surgery, respectively. The sections were stained with hematoxylin and eosin stain, ?-smooth muscle actin (?-SMA) and proliferating cell nuclear antigen (PCNA) immunocytochemistry stain. PCNA index was calculated in intima, media and adventitia, respectively. Results (1) HE staining: From 1W to 4W, the hyperplasia of intima and media appeared gradually in both group S and group NS, nevertheless such hyperplasia in group S was lessintense than in group NS. (2) ?-SMA staining: Almost all cells in media were positive, but few cells were positive in intima of both groups at 1W; the thickness of intima of both groups increased gradually, and almost all cells except endothelial cells were positive in intima in both groups, though the thickness of intima of group S was smaller than in group NS at 2W and 4W. (3) PCNA index: the index of intima in both two groups peaked at 2W, and the index of intima in group S was less than in group NS at 2W and 4W, P

Objective The construction of the reconstructed acellular extracellular matrix(REAECM) of bone and preliminary investigation of biocompatibility of REAECM was performed to supply the experimental basis for the extracellular scaffold of bone tissue engineering. Methods Applying the technique of culture in vitro, biocompatibility of the REAECM cultured with osteoblasts was observed using phase-contrast microscope and scanning eletron microscope at 1-4 weeks. Results The osteoblasts could attach and proliferate, even grow well into the foam of REAECM.Conclusion REAECM is an excellent scaffold material for bony tissue engineering construction, which pocesses a morphological structure of three-dimensional foam. The REAECM showed a good biocompatibility with osteoblasts co-cultured in vitro. There was prospective signs of REAECM to the attachment, proliferation of the osteoblasts

Objective To investigate the clinicopathological and immunohistochemical expression in 8 cases with synchronous occurrence of digestive tract cancer and GIST. Methods Clinical and pathologic data of 8 out of 70 cases of GIST coexisted with gastrointestinal cancer were recorded, and immunohistochemical stain ( Envision method) was used to detect the expressions of CD117, CD34 ,Vimenlin etc. Results In 8 cases of GIST (4 benign, 3 borderline, 1 malignant) coexisted with GI carcinoma, of which 6 cases featured the simultaneous occurrence of GIST and adenocarcinomas (5 cases in slomach and 1 case in colon) , whereas the other 2 cases associated with squamus cell carcinoma of esophagus. In 4 cases, tumors arose from the same organ, in the other 4 cases they developed from different sites of digestive tract. In all of the cases two kinds of neoplasms were developed in different areas without any connection, preoperative endoscopy and biopsy showed adenocarcinomas and squamous cell carcinoma, but histologic and clinical diagnosis of coexisted tumors were not achieved in any case. All GIST expressed Vimentin and CD34; 7 cases expressed CD117; 2 cases were focally positive for S-100 protein and 1 each for SMA and Desmin. Conclusion The simultaneous occurrence of epithelial tumor and GIST in digestive tract is not less than that usually expected, in clinical practice we should pay much attention on the diagnosis of this entity. Endoscopic biopsy conjugated with profound inspection during operation and pathological examination of specimen postoperatively can improve the possibility of early diagnosis.

ObjectiveTo investigate the roles of apoptosis and express io n of PCNA in human vulnerable atherosclerotic plaque.MethodsAp optosis was detected by TUNEL.Expessions of PCNA were detected in samples of vul nerable plagues From 23 cases of coronary heart disease.by SP immunohistochemica l technique.ResultsThe expession level of PCNA in the smooth m uscle cells (SMCs) on fibrous cap region was significantly elevated than that of the other three regions.The expession level of PCNA in the inflammatory cells ( ICs) on fibrous cap and shoulder region were significantly elevated than that of the other two regions.The amount of apoptosis in the SMCs on lipid-rich core wa s much more than that of the other three regions.The amount of apoptosis in the ICs on lipid-rich core was more than the other three regions.The expression leve ls of PCNA in fibrous cap and shoulder were significantly higher than TUNEL posi tive cell (P

Objective To study the inlfuence factors on detection of activity of four coagulation factors in prothrombin complex concentrates (PCC) by several factors. Methods Using Pharmacopoeia of the People’s Republic of China (2010) as reference, the activity of four coagulation factors in PCC were investigated by choosing different pre-treatments, different diluents, different salt concentration, different standard human plasma and different company reagents. Results The activity of FII, FVII, FX were decreased and FIX was increased in the condition of adding protamine sulfate, and there were no differences of four coagulation factors whether warm bath in 37 for 15 min or not. However, the differences of four coagulation factors were significant by using deficient plasma, saline, distilled water and commercial dilution buffer(P<0.05). The activity of coagulation factor II, X in 1 mol/L salt concentration of PCC were significantly lower than in 0.25 mol/L(P<0.05), while coagulation factor VII, IX were not. The activity of FII, FVII, FIX, and FX were different by using different standard human plasma to make standard curve. The activity of four coagulation factors existed significant difference(P=0.00) by using SIEMENS company reagents and domestic reagents. Conclusion Choosing different pre-treatments, different dilution buffers, salt concentration, standard human plasma and commercial kits will inlfuence the detection result of coagulation factors.

Dietary fiber contents in 34 common foods perchased in Beijing markets have been determined with detergent method, including neutral detergent fiber, acid detergent fiber, cellulose, hemicellulose and lignin. On dry basis, the dietary fiber contents of vegetables varied with kinds of food: the dietary fiber contents were higher in tender stems, leaves, stalks and flowers; lower in starchy tubers and roots; medium in non-starchy tubers and roots. The propotions of dietary fiber components were different in various categories of foods. Cellulose was the major component in vegetables and legumes, but in most cereals, hemicellulose content was higher than cellulose. All foods had the lowest lignin content with the exception of garlic bolt.

Aim To obtain high pure hPPAR?1LBD fusion protein.Methods A cDNA encoding ligand binding domain(LBD)of PPAR?1 was amplified by RT-PCR from human fatty tissue and the product was inserted into the downstream of the malE gene in the vector pMAL-p2X,which encoded maltose-binding protein(MBP).The recombinant plasmid containing MBP-PPAR?1 gene was transformed into E.coli.TB1 and the expression conditions of the recombinant strain were optimized.Results The DNA strap of MW(909 bp) was presented after re-combinant plasmid was digested by Hind Ⅲ and BamH Ⅰ.The high efficient expression of MBP-PPAR?1 fusion protein in TB1 cells was observed with 38.54% product of the total cytoplasm proteins when 0.4 mmol?L-1 IPTG and 6 h incubation were taken at 30℃.Conclusion The recombinant vector was successfully constructed.It could high efficiently express hPPAR?1LBD fusion protein in TB1 cells and obtain the hPPAR?1LBD fusion protein with high bioactivity.

Objective To study the influence of prothrombin complex concentrates (PCC) containing different levels of antithrombin (AT) and heparin on its procoagulation and anticoagulation activities.Methods PCC containing traces of heparin and AT were prepared.The design of orthogonal experiment: set AT and heparin two variable factors, each factor respectively from three levels: 0, 0.4, 0.8 IU/mL; 0, 2.5, 5.0 IU/mL.Their influence on the procoagulation and anticoagulation activities of PCC were analysed.Results The R value of the influence of AT on thrombin inhibitory capacities was higher than that of heparin.With the increase of AT level, time to peak gradually extended.Lag time of 0.4 IU/mL and 0.8 IU/mL AT was the same.The peak height of 0.4 IU/mL AT was highest.The higher the level of AT, the greater the impact on thrombin inhibitory capacities.0.4 IU/mL and 0.8 IU/mL AT had similar impact on thrombin inhibitory capacities.The R values of the influence of heparin on thrombin generation were higher than that of AT.With the increase of heparin level, lag time and time to peak were longer while the peak height declined sharply.0 IU/mL and 2.5 IU/mL heparin had similar influence on thrombin generation.The higher the level of heparin, the greater influence on thrombin inhibitory capacities.2.5 IU/mL and 5.0 IU/mL heparin had similar influence on thrombin inhibitory capacities.Conclusion AT has greater influence on the anticoagulation activities of PCC than that of heparin, while heparin has greater influence on the procoagulation activities of PCC than that of AT.PCC containing medium levels of AT and heparin is relatively balanced between procoagulation and anticoagulation.

Background and purpose:Chemotherapy is the important way of breast cancer treatment, but the drug-resistance has attracted special attention. The emergence of drug resistance is closely related to the abnormal enhancement of DNA-damage repair. Both Kif4A and PARP-1 are important molecules of DNA repair. The research investigated the function of Kif4A in epirubicin up-regulating the activity of PARP-1 in breast cancer cells and possible significance. Methods:Western blot was used to detect the expression of Kif4A and PARP-1 after treatment with epirubicin in MDA-MB-231 and MCF-7 cells; the expression of PARP-1 and its activity were detected after high expression of Kif4A and treatment with epirubicin;FCM was used to detect cell apoptosis after treatment with epirubicin combined with PARP-1 inhibitor 3-ABA. Results:Epirubicin up-regulated PARP-1 activity and induced low expression of Kif4A in breast cancer cells, both of them showed dose-dependent and time-dependent. After high expression of Kif4A, the activity of PARP-1 was inhibited and the apoptosis of cells increased, epirubicin partially reversed the activity of PARP-1 inhibited by high Kif4A expression. Both of epirubicin and 3-ABA induced cell apoptosis, combination of them further increased cell apoptosis compared with alone used (P<0.05). The results also showed the apoptosis rate of MDA-MB-231 cells induced by epirubicin, PARP-1 inhibitor 3-ABA and high expression Kif4A was higher than that of MCF-7 cells (P<0.05). Conclusion:Epirubicin increases the activity of PARP-1 dependent on the low expression of Kif4A in breast cancer cells. Kif4A might become a novel target for overcoming resistance of epirubicin.