Objective To find out the changes of endothelial cell function and coagulation-fibrinolysis system in maintenance hemodialysis(MHD)patients with diabetic nephropathy(DN).Methods The plasma levels of TM,PAI-1,TAT and PAP in 28 DN-MHD,34 non-DN MHD and 40 controls were measured by ELISA.Results (1)The levels of TM,PAI-1,TAT and PAP in both DN group and non-DN group were significantly higher than those in control group,P

Objective To analyze the load-bearing mechanism and stress relaxation properties of the articular cartilage (AC) through finite element simulation and experimental validation. Methods By comprehensively considering the solid phase of the matrix, the liquid phase of the pore and the reinforced phase of the collagen fibrils in AC, as well as the dilatation dependent permeability of AC, a fibril reinforced poroelastic (FRPE) model was built including changes of void ratio with subsurface depth of the AC. Based on the proposed model, and by utilizing ABAQUS software and FORTRAN language, the finite element analysis (FEA) on unconfined ramp compression of AC was conducted. The equilibrium modulus of porcine cartilage tissues under unconfined compression was measured by a self-designed biomechanical property measuring system, and the results between the FEA and the unconfined ramp compression test of the AC were compared. Results The liquid pore pressurization could last about 80 seconds and contributed up to 90 % of the total stress at the middle point of the test specimen when it was compressed at a strain rate of 0.45%/s. Conclusions The FEA on the unconfined ramp compression of AC based on the FRPE model can quantitatively evaluate the load bearing capacity of the solid and liquid phase, respectively, changed with different strain and loading time. Simulation analysis combined with the unconfined ramp compression test results facilitates the evaluation on mechanics properties of the cartilage with more accuracy.

Femur ; diagnostic imaging ; injuries ; physiopathology ; Fractures, Malunited ; diagnostic imaging ; physiopathology ; surgery ; therapy ; Humans ; Male ; Manipulation, Orthopedic ; methods ; Postoperative Complications ; diagnostic imaging ; physiopathology ; therapy ; Tomography, X-Ray Computed ; Young Adult

Objective:To compare the results of operative versus interventional treatments in patients presenting with sentinel hemorrhage after hepatobiliary and pancreatic surgery.Methods:The clinical data of patients presenting with sentinel hemorrhage after hepatobiliary and pancreatic surgery at the Department of Hepatobiliary Surgery, the Second Affiliated Hospital of Guangzhou Medical University from August 2017 to July 2022 were retrospectively analyzed. Of 82 patients who were enrolled in this study, there were 50 males and 32 females, aged (59.0±7.7) years. The patients were divided into the interventional group ( n=42) and the surgical group ( n=40) based on the treatment they received for sentinel hemorrhage. The vascular injury rate, the first operation time for sentinel bleeding, the rate of successful hemostasis in a single operation, the number of deaths and other indicators were compared between groups. Results:In both the two groups of patients who underwent percutaneous transhepatic cholangial drainage, hepatectomy, endoscopic retrograde cholangiopancreatography, hilar cholangiocarcinoma resection and cholecystectomy were mainly performed hepatic artery injury, pancreaticoduodenectomy with gastroduodenal artery injury, and splenectomy with splenic artery injury. In the intervention group, 36 patients (85.7%) were successfully hemostasis after single treatment, and 32 patients (80.0%) in the operation group, and there was no significant difference between the two groups (χ 2=0.47, P=0.492). The first operation time for the intervention group was (40.5±8.5) min and the mortality rate was 2.4% (1/42), which were significantly better than that of the operation group (90.6±20.8) min and 15.0% (6/40) (all P<0.05). Conclusion:Interventional therapy can be used as the first-line diagnosis and treatment for sentinel bleeding after hepatobiliary and pancreatic surgery. It has the advantages of a lower mortality rate in treating these patients.

Objective To study the features of Yersinia pestis(Y.pestis)in areas along Qinghai-Tibet Railroad in Qinghai Province.Methods To identify the biologic types and the molecular biological feathers of Y.pestis isolated from areas along Qinghai-Tibet Railroad in Qinghai from 2001-2006.Results All the tested Y.pestis was biologically of classical type and ecologically of Qinghai-Tibet plateau type.The Y.pestis had high virulence.The Y.pestis of 65×106 plasmids was distributed in the Tanggula area,the Y.pestis of 52×106plasmids,in Tianjun and Delingha areas.The Y.pestis srains carried 52 × 106 plasmids.except the two containing 65 X 106 plasmids in Wulan County.The genetic type of Y.pestis in Tanggula was type 5 and that in Zongwulong of Delingha,Saishike,Keke,Tongpu of Wulan was type 8 except 2 strains of Y.pestis isolated from woodchuck and the patients in Dananwan of Tongpu,Wulan County were type 15.Conclusion The Y.pestis in the area along Qinghai-Tibet Railroad in Qinghai belongs to Qinghai-Tibet plateau type with high virulence.

Objective: To evaluate the efficacy of allicin combined with cyclophosphamide on neuroblastoma (NB)-bearing mice and explore the immunological mechanism in it. Methods: A total of 30 NB-bearing mice were equally randomized into model group, cyclophosphamide group and combined therapy group, 10 nudemice were set as normal saline (NS) group. Cyclophosphamide group and combined therapy group were weekly injected with 60 mg/kg cyclophosphamide for four weeks; besides, combined therapy group was given with allicin (10 mg/kg/d) by gastric perfusion for 4 weeks; model group and NS group were given with the same volume of NS. Serum VEGF content was detected by ELISA pre-treating (0 d) and on the 3rd d, 14th d and 28th d; on 29th d, all mice were sacrificed and the tumor, liver, spleen and thymic tissues were weighted. Tumors were made into paraffin section for detecting tumor cell apoptosis and proliferation by TUNEL and BrdU method, respectively. Survival curves were drawn by Kaplan-Meier method. Results: After treatment, both treatment groups relieved on viscera indexes, VEGF level, T cell subsets distribution and tumor growth and each index of combined therapy group was better than cyclophosphamide group (P<0.05 or 0.01); only combined therapy group could significantly increase the lifetime of NB-bearing mice (μ ²=5.667, P=0.017). Conclusions: Allicin can improve T cell subsets distribution and inhibit VEGF expression through its immunomodulatory activity, thereby improve the efficiency on NB in coordination with cyclophosphamide.

Objective::To observe the effect of realgar nanoparticles (a representative drug in toxin eliminating therapeutics) targeting hypoxia-inducible factors (HIF), which act as effector molecules on metabolic reprogramming of lung cancer stem cells, and to explore the effect mechanism of lung cancer stem cells and metabolic reprogramming in the process of lung cancer metastasis, so as to verify the effectiveness of toxin eliminating therapeutics in the prevention and treatment of lung cancer metastasis. Method::Lung cancer A549 cells were cultured in vitro, and lung cancer stem cells were then identified and selected. The stem cells were divided into blank control group, cisplatin group (5 mg·L^-1), realgar nanoparticles low, medium and high dose groups (100, 200, 400 mg·L^-1). After intervention, glucose oxidase method was used to detect the effect of realgar nanoparticles on the glucose metabolism of lung cancer stem cells, real-time polymerase chain reaction (Real-time PCR) was used to detect the mRNA expression levels of hypoxia-inducible factors-1α (HIF-1α), C-myc and p53, while Western blot was used to detect the expression of related proteins HIF-1α, phosphatidylinositol 3-kinase (PI3K), protein kinase B (Akt) and mammalian target of rapamycin (mTOR), and enzyme linked immunosorbent assay (ELISA) was used to detect the glucose transporter 1 (GLUT1), pyruvate dehydrogenase kinase 1 (PDK1), pyruvate kinase M (PKM), phosphofructokinase(PFK), pyruvate dehydrogenase (PDH) and lactic dehydrogenase (LDH) expression. Result::As compared with the blank control group, realgar nanoparticles can reduce the glucose consumption of lung cancer stem cells, and the glucose consumption was reduced with the increase of dose in a time-and dose-dependent manner (P<0.01). Realgar nanoparticles can inhibit the mRNA expression of HIF-1α, a key factor in metabolic reprogramming of lung cancer stem cells (P<0.05, P<0.01), down-regulated C-myc mRNA and up-regulated the p53 mRNA expression (P<0.05, P<0.01), down-regulated protein expressions of PI3K, Akt, mTOR(P<0.05, P<0.01), and inhibited the expression of related enzymes GLUT1, PDK1, PFK, PKM, PDH, and LDH levels (P<0.05, P<0.01). With the increase of dose, the regulation and control ability of realgar nanoparticles gradually increased. Conclusion::Toxin eliminating therapeutics can drive the metabolic reprogramming of lung cancer stem cells by targeting HIF effector molecule, and then inhibit the invasion and metastasis of lung cancer.