Adult ; Aged ; Arthritis, Rheumatoid ; drug therapy ; Drugs, Chinese Herbal ; therapeutic use ; Female ; Humans ; Male ; Middle Aged ; Phytotherapy

BACKGROUND:The finite element model has been developed from two-dimensional model to three-dimensional model, from linear model to nonlinear model. As the advantage of this method in the analysis of mechanical characteristics of the irregular objects, the finite element model has been widely used in the research of orthopedic biomechanics, especial y in the research of hip joint. OBJECTIVE:To analyze the stress state of human femur with finite element analysis method and to investigate a method that can rapidly construct femoral finite element model and precisely analyze the biomechanics. METHODS:Normal male femur was used as specimen for CT scan to obtain cross-sectional images of femur in each slice. Three-dimensional reconstruction was performed with DICOM data and MIMICS software, then the femoral three-dimensional finite element model was established with the finite element analysis ABQUS 6.8 software, and the stress distribution of the model was analyzed under loading condition. RESULTS AND CONCLUSION:Based on DICOM data, three-dimensional finite element model of femur was constructed more quickly and precisely. The models were divided into 38 636 nodes and 201 422 units. The model included the parts of cortical and cancel ous bone. The biomechanical test results were accorded with the previous results, so the model could objectively reflect the real femur shape and biomechanical behavior with high precision. The Mimics software provided a simpler and effective method for the construction of femur model and improved the efficiency of modeling, and the three-dimensional finite element model based on DICOM data was accurate in shape and can be used for the normal research on biomechanical behavior of femur. The stress distribution analyzed with ABQUS 6.8 software is consistent with the clinical observation.

Objective To explore the optimal method of anesthesia in radical resection of gastric cancer by comparing the effects of two anesthesia techniques on the balance of Th1/Th2 in order to provide evidence for clinical anesthesia manage-ment.Methods Forty patients who underwent elective radical resection of gastric cancer were randomized into two groups:in-halation anesthesia group(group S)and total intravenous anesthesia group(group P),in which sevoflurane and propofol were ad-ministered for the induction and maintenance of anesthesia,respectively.The general data of the patients were collected,the tis-sue type of tumors obtained and the fluid infusion and blood loss volumes recoded.The VAS score was obtained 1 h,6 h and 5 d after the surgery.Before the induction of anesthesia,6 h and 5 d after surgery,the blood samples were drawn to determine the serum levels of IL-1β,IFN-γ,TNF-α,IL-2,IL-6 and IL-10.Flow cytometry was used to detect the proportion of CD3+CD8-IFN-γ+ and CD3+CD8-IL-10+ cells and the Th1/Th2 ratio was calculated.Results The level of IL-6 was increased post-sur-gically in groups S and P(P<0.05).There were no significant changes in the levels of IL-1β,IL-2 and IL-10 in groups S and P and in the levels of TNF-αand IFN-γ,and the Th1/Th2 ratio in group S between before the induction of anesthesia and different time points after the surgery(P>0.05).The levels of TNF-αand IFN-γ,and the Th1/Th2 ratio were significantly increased in group P 5 d after the surgery(P<0.05).Conclusion Total intravenous anesthesia with propofol can enhance Th1 response and it is an ideal anesthetic method for radical resection of gastric cancer.

Dipeptidyl peptidase-4 (DPP-4) inhibitors, a new kind of oral hypoglycemic drugs, can significantly lower blood glu-cose levels in the patients with type 2 diabetes without common side effects such as body weight gain, hypoglycemia and gastrointestinal disturbances. Therefore, DPP-4 inhibitors play an increasingly important role in the treatment of type 2 diabetes. In this review, the re-search progress in the action mechanism, pharmacokinetics and clinical applications of DPP-4 inhibitors was summarized in order to provide reference for the clinical application.

Aim To study the effect of BNIP3 on hy-poxia-induced autophagic cell death in gastric carcino-ma.Methods The protein levels of BNIP3 and LC3-Ⅱ of 1 8 cases of gastric carcinoma were studied with immunocytochemistry and Western blot analysis be-tween normal and tumor tissues.The expression of LC3-Ⅱ in SGC-7901 cells was assessed while knock-down of BNIP3 by siRNA in CoCl2-induced hypoxia, and the effect of 3-MA was also studied.Cell viability in hypoxia treatment for 48 h was estimated with cell counting kit-8 (CCK8).Results Compared with nor-mal tissues,the protein levels of BNIP3 and LC3-Ⅱwere increased in tumor tissues.BNIP3 siRNA could decrease the expression of LC3-Ⅱ and enhance the cell viability,while inhibition of autophagy could also in-crease the cell viability in SGC-7901 cells.Conclu-sions BNIP3 may play a role in hypoxia-induced cell death in gastric carcinoma,and the possible mecha-nism may be related to the regulation of autophagy.

Objective:To establish the competency model for medical representatives in China. Methods:Firstly, the competen-cy elements for medical representatives were defined through the literature research and logic analysis, the importance of each element was then evaluated by a questionnaire, and the survey results were analyzed by a factor analysis approach. Lastly, the weight of each factor was confirmed by analytic hierarchy process. Results & Conclusion: The competency model, which consists of 5 dimensions ( professional quality, professional ethics, knowledge, personal characteristics and relationship management) , 26 competency elements and the weight of each factor, is established successfully.

Objective To review the biologic characteristics and biologic effect of cholecystokinine (CCK) on the central nervous system. Methods The literatures of recent years on research advancement of cholecystokinine as neurotransmitters/peptides in signal transduction, neuron protection and pain management in the central nervous system are reviewed. Results CCK possesses the ability to suppress the convulsant effects of convulsants. CCK8 is able to reduce the neural damage caused and delay the neural aging. CCK antagonists play an important role in human pain transduction. Conclusion CCK has been proven to be one of the richest neurotransmitters/neuropeptides as well as an important signal factor in the brain, and its important biologic effect is being confirmed.

Pre-implantation Genetic Diagnosis(PGD) is an advanced technology based on in-vitro fertility-embryo transfer,which binds multiple-discipline arts,specially the research on DNA analysis assay of single cell,to reach the aim of aristogenesis and wash out abnormal embryo before transfer.With the development of this technique and the ever wider applications,ethical issues also arise.This paper focuses on these ethical issues related to PGD,expecting an actual benefit for human.

The paper tells how the authors' hospital managed under the circumstances of fierce competition in the medical market to integrate the idea of a marketing chain with medical service, construct a quality and efficient marketing chain for medical service, constantly readjust each part and element of the “chain management” of technical items and service manner, and realize multi layer and multi dimensional network management. The hospital also established a “chain management” framework characterized by “compliance with market laws, customers highest and delivery of quality service”. Setting on itself such high demands as “highest speed, best quality, lowest cost and optimal service”, the hospital did its best to create a strong marketing chain for medical service products, thus providing theoretical basis and practical reform experience for the marketing of medical service products.

砄bjective: To study the rule of the degradation of HA artificial bone(HAB). Methods: The samples of HAB were immersed in PBS or distilled water (DW),the changes of the shape, weight, compressive strength of the samples and pH value of the immersion solutions were measred at the intervals of 2 or 4 weeks until 28 weeks. Results: At 4 weeks, HAB began to be degraded, 8 weeks later, the speed of the degradation slowed down. From 4 to 12 weeks, the compressive strength decreased rapidly. The pH value of the immersion solutions decreased from 2 to 12 weeks,but increased from 12 to 28 weeks when it was close to the neutral value. Conclusion: HA artificial bone can be degraded in PBS solution, and the degradation can cause noticeable changes of the compressive strength of the material and pH value of the immersion solution.