The drug abuse and addiction is rising currently,it is a bad societal problem as well as a more important medical treatment problem. The experiment of Morphine-induced conditioned place preference is one of the methods detect the intensifying quality of the drug. We deeply studied the action of histamine and dopamine neuron within the brain in the experiment of Morphine- induced conditioned place preference and the correlation under the video frequency tracking-automatism analysis of computer(adopt Mice Track analysis software). It provided a new experiment platform for studying and developing new type medicine of histamine and dopamine.

Biochemistry is an important basic medical course, and it is also a difficult course.In order to improve the comprehensive ability of seven-year program clinical medical students in Capital Medical University, teaching reform of Biochemistry was carried out.Teaching content was redesigned to strengthen the learning of basic knowledge of Biochemistry and to increase the depth of teaching content, while expanding the content by introducing new achievements and new technology to keep up with the forefront in the development of Biochemistry.Various methods such as the comparative method, case teaching and so on, were used flexibly in the teaching practice in order to improve teaching effects.The experiments carried out in the course were also redesigned and integrated, some distinctive experiments such as designing experiments, comprehensive experiments and innovative experiments were opened to improve students' hands-on ability and to cultivate students' scientific thinking.

Objective To improve the knowledge of CT appearances of spondylolysis of the lumbar spine.Methods 32 patients with lumbar spinal spondylalysis were examed by Elscint 2400 CT.CT appearances were analyzed.Results The CT feature of spondylolysis was loop-broken sign.Spondylolisthesis was present in 25 cases,the CT mainfestations included the increased anterior pasterior diameter of spinal canal,wich sign,deformity of vertebral canal and pseudobulging disk.Other features included asymmetrical zygapophysial joints.Conclusion “loop-broken sign” is a relatively specific CT appearance of spondylolysis of the lumbar spine,which is significant in diagnosting spondylolysis without spondylolisthesis.

[Summary] Interleukin-2 receptor antagonist (IL-2Ra,ie,basiliximab and daclizumab),a new antibody agent,is widely employed in lowering the risk of acute rejection after organ transplantation,but it meanwhile causes increasing concerns on the effect it exerts on glucose metabolism in transplant recipients,and so far the exact effect still remains controversial.New onset diabetes after transplantation (NODAT) is one of the most influential metabolic complications affecting graft survival and patients' long-term outcomes.Some of the current researches indicate that IL2Ra may improve glucose metabolism in the transplant recipients,some show just the opposite,yet others show no effects.Hence further investigations focusing this aspect are needed.

Objective:To investigate the inhibitory effects of endostatin (ES) on the growth and metastasis of transplanted osteosarcoma UMR106 cells in nude mice. Methods: pBudCE4.1/ES was amplified and transfected into osteosarcoma cell line UMR106 through lipidosome; the non-transfected UMR106 cells were eliminated by Zeocin. The proliferation of ES-UMR106 cells was examined by MTT assay and the production of ES by ES-UMR106 cells was investigated by ELISA. The effects of ES on the in vitro proliferation of vascular endothelial cells were observed by MTT assay. Sixteen nude mice were randomly divided into 2 groups: one group was transplanted with UMR106 cells and the other with ES-UMR106 cells. The tumor size, pathological observation, tumor angiogenesis, and the pulmonary metastasis were observed. Results: The proliferation of UMR106 cells was not affected by ES transfection. ES-UMR106 cells expressed bioactive ES, and the ES level in the medium was higher than 350 ng/ml 48 h after transfection. ES produced by ES-UMR106 cells significantly inhibited the proliferation of vascular endothelial cells. Compared with UMR106 transplanted tumor, ES-UMR106 transplanted tumor grew slowly in nude mice, and the formed tumors was well-margined and had less angiogenesis and mass necrosis. Two of the 8 mice transplanted with UMP106 cells had pulmonary metastasis and no metastasis was found in ES-UMR106 transplanted group. Conclusion: Transfection with recombinant endostatin plasmid can inhibit the growth and metastasis of transplanted osteosarcoma in nude mice by inhibiting vascular endothelial cell proliferation.

Inorganic layered materials with the open structure of low dimension and good biological compatibility and stability are considered as one of the most promising materials for immobilizing biomolecules, which can not only adjust the spacing of layers according to guest molecular size to prevent leakage of guest molecule, but also reduce the effects of surrounding elements on immobilized molecules significantly. Moreover, they can promote electron transfer between enzyme and the electrode. Therefore, the inorganic layered materials have great application potential in electrochemical sensors. This paper reviews the ways of immobilizing guest molecules of inorganic layered materials and the applications and development prospects of the different types of inorganic layered materials including cationic, anionic and nonionic inorganic layered materials in electrochemical sensor.

Objective To evaluate the clinical efficacy of ultrasonic-harmonic scalpel in open thyroid surgery.Methods Totally 70 patients with thyroid surgery from January 2012 to January 2014 in some hospital were selected as the study objects, who were divided into a control group and an observation group equally. The patients in the control group went through traditional surgery, and the ones in the observation group underwent open thyroid surgery. Then the operative time, blood loss, postoperative hospital stay before and after surgery and body stress-related serum markers of two groups were analyzed and compared.Results The observation group had the operative time, blood loss and postoperative hospital stay significantly better than those of the control group, and the body stress-related serum markers 5 days after operation significantly lower than that of the control group, with P<0.05.Conclusion The short-term clinical effect of ultrasonic-harmonic scalpel in open thyroid surgery is significantly better than that of traditional surgery, which has high safety and lower degree of adverse physical stress.

Objective To compare the effects of two surgical procedures via comparison on tibial fractures with/without proximal fibula fractures ,and to explore the reference importance of proximal fibula fractures in surgery for complex tibial plateau fracturesinvolvingposterior and lateral spine .Methods Totally 69 cases of patients with complex tibial plateau fracturesinvolving‐posterior and lateral spine (Schatzker Ⅴ and Ⅵ) were selected ,who accepted treatment between January 2008 and October 2012 . The patients were screed according to the quality of fracture reduction immediately after operation .39 cases were screened whose scores were excellent and the general condition was similar .The patients were divided into group A1 ,A2 and B1 and B2 according to the whether there was proximal fibula fractures and whether accepted posterior lateral support steel plate:group A1 (n=10):without proximal fibula fractures but with posterior lateral support steel plate;group A2 (n=11):without proximal fibula fractures and without posterior lateral support steel plate;group B1 (n=9):with proximal fibula fractures and with posterior lateral support steel plate;group B2 (n=9):with proximal fibula fractures but without posterior lateral support steel plate .According to the knee scoring system of American Hospital for Special Surgery (HSS) ,a total of 39 cases of patients were followed up for 12-14 months (average 12 .8 months) to evaluate the recovery condition of knee function .And correlations between the scores of the 4 groups were compared .Results There were statistically significant differences between group B1 and group B2 on HSS scores (P<0 .01) ,but there were not between group A1 and A2 (P>0 .05) .Conclusion For patients with complex tibial plateau fracturesin‐volvingposterior and lateral spine and with proximal fibula fractures ,posterior lateral support steel plate can achieve more satisfac‐tory rehabilitation function .

BACKGROUND:Silver nanoparticles (AgNPs) show strong antibacterial effect and are not easy to have drug resistance. But the antibacterial mechanisms of AgNPs have not been wel developed.
OBJECTIVE:To explain the antibacterial mechanisms of AgNPs.
METHODS:We investigated the influence of Ti, TiO2 and TiO2 containing AgNPs onEscherichia coliand Staphylococcus aureus by bacterial inhibition ring test. Escherichia coli was cultured in LB liquid medium with 0, 5, 10 mg/L AgNPs. We measured the absorbance value of bacterial culture. DNA gel electrophoresis was used to study the effect of AgNPs onEscherichia coliDNA. Then we researched the character of apoptosis on Escherichia coli by Annexin V and PI staining, using flow cytometry.
RESULTS AND CONCLUSION:The inhibiting effect of Ti and TiO2 onEscherichia coliandStaphylococcus aureus was not obvious. But the inhibition rings of TiO2 containing AgNPs to bacteria appeared. The absorbance value of Escherichia coliculture was reduced whenEscherichia coliwas co-cultured with AgNPs. And this decrease tendency was in direct proportion with AgNPs concentration. AgNPs reduced the amount of DNA of Escherichia coli and this tendency was directly proportional with AgNPs concentration. TheEscherichia coli apoptosis rate induced by AgNPs was increased and this tendency was positively correlated to the AgNPs concentration. These results indicate that AgNPs can induce bacterial apoptosis to influence the growth of bacteria.

Objective To explore students nurses′acceptance of case-based group assessment. Method A total of 100 student nurses participated in the survey by a self-designed questionnaire to evaluate the perception and acceptance of the student nurses. Results The score on the acceptance of case-based group assessment was (2.44 ± 0.46). The items with higher acceptance included teamwork spirit, clinical reasoning and decision-making ability, and the items with lower acceptance were improving of nurse-patient communication and the nursing skills. Conclusions The student nurses have a good acceptance of the case-based group assessment and think this assessment method can contribute to development of teamwork spirit and competency of clinical reasoning and decision-making. On the other hand, they suggest we should strengthen the ability in nurse-patient communication and optimize the links in ability assessment.