The S100 proteins are a multi-gene calcium-binding family,which are differently expressed in a variety of tumors.It is found to be associated with tumor invasion and metastasis.As a tumor-associated biomarkers,unraveling the relationship between S100 and prostate cancer progression as well as molecular mechanisms,would provide an important basis for the clinical diagnosis and therapeutic monitoring.

OBJECTIVE:To establish an RP-HPLC method for the determination of doxorubicin hydrochloride concentration in human plasma.METHODS:Tianhe Kromasil C18 was used as column,A solution of methenol-0.01 mol?L-1ammonium dihydrogen phosphate-acetic acid(30200.1) was used as the mobile phase at a flow rate of 1.0 mL?min-1.The detection of wavelength was set at 233 nm.The sample size was 20?L and the column temperature was 35℃.The internal standard was daunorubicin.RESULTS:The calibration curve was linear in the range from 0.25～20.16 ?g?mL-1(r=0.999 6);the average methodological recovery was 96.45%(RSD=2.16%).CONCLUSIONS:The method is rapid,accurate,reproducible and easy to use in clinical detection of blood concentration.

OBJECTIVE:To establish a RP-HPLC method to determinate the plasma concentration of paclitaxel in tumor patients.METHODS:Paclitaxel was extracted from plasma with organic phase(ethyl-acetate)by two-step extraction on Tianhe Kromasil C18 column(250 mm?4.6 mm,5 ?m)with a mobile phase consisted of acetonitrile-methanol-water(40∶25∶40)at a flow rate of 1 mL?min-1.The detective wavelength was set at 227 nm and the column temperature was maintained at 35 ℃.RESULTS:The linear range of paclitaxel was 0.05～5.00 mg?L-1(r=0.999 7)with average recovery rate at 98.75%～100.44%.Both intra-day RSD and inter-day RSD were less than 5%(n=5).The plasma concentration-time profile in 11 patients after iv infusion of paclitaxel was in line with a two-compartment model.CONCLUSION:This established method is simple,accurate,reproducible and applicable for clinical determination of blood drug concentration and pharmacokinetic studies.

Objective To study Baizhu's inhibitory effect on S180 sarcoma growth and its effect on Bcl-2 expression in tumor-transfected mice. Methods S180 cells were subcutaneously injected into 60 healthy Kunming mice. Meanwhile the mice were dealt with MTX or Baizhu, separately; the weight of tumor was measured in the following two weeks; the expression of Bcl-2 was detected by RT-PCR. Results The tumor's weight in Baizhu group was lower than that in model group, but higher than in MTX group (P<0.05), but Baizhu's inhibition was not associated with its dose (P>0.05), and Baizhu's rate of tumor growth inhibition was lower than that of MTX. Compared with that in control group, Bcl-2 expression was lower in Baizhu group obviously. Conclusion Baizhu can inhibit tumor growth and serve as an adjuvant drug in tumor therapy.

Objective To design and manufacture a hypobaric cabin simulator for experimental animals.Methods The simulator was composed of a fully transparent working chamber,an electrical chamber,a pressure control component and a program control component,which had its body made of polymethyl methacrylate plastics,the hatch made of metal plate and support by reinforced metal bar.The air inside chamber was exhausted by the diaphragm vacuum pump,the air inflow was controlled by proportional valve,and the inner pressure and the speed of rise and decline were exactly controlled by the balance of inflow and exhaust.Results The new type of hypobaric cabin simulator had the characteristics of accurate pressure control,low fluctuation range and controllable up and down time,low noise as well as adaptable air exchange rate.Conclusion The new type of hypobaric cabin simulator matches the national standard for experimental animals,and can be used in making the animal model of high altitude diseases.

Bicuspid ; Dental Pulp Cavity ; pathology ; Humans ; Mandible ; Root Canal Therapy

Objective To analyze the distribution and antimicrobial resistance of pathogens isolated from department of hematology during the past three years.Methods Pathogenic strains isolated from patients hospitalized in a hematology de-partment between January 2011 and December 2013 were collected,antimicrobial susceptibility testing was performed by Kirby-Bauer disk diffusion method or automatic system,antimicrobial susceptibility testing results were judged according to American Clinical and Laboratory Standards Institute 2011, data were analyzed by WHONET 5.6 software. Results A total of 462 clinical isolates were collected in 2011—2013,including 161 gram-positive cocci isolates,279 gram-negative bacilli,and 22 fungi.Of Staphylococcus spp ,detection rate of methicillin-resistant coagulase negative Staphylo-coccus(MRCNS)and methicillin-resistant Staphylococcus aureus (MRSA)was 81.37% and 62.50%respectively.The re-sistant rate of Staphylococcus spp .and Enterococcus spp .to linezolid was 1.69% and 3.57% respectively,resistant rate of Staphylococcus spp .to teicoplanin was 3.39%,vancomycin-resistant gram-positive coccus was not found.Enterobacte-riaceae strains Escherichia coli and Klebsiella pneumoniae were highly susceptible to carbapenems,the sensitivity rates were 97.56%—98.88%;while nonfermentative gram-negative bacilli Pseudomonas aeruginosa and Acinetobacter bauman-nii strains were obviously resistant to carbapenems,the resistance rates were 38.71%—64.00%.Conclusion Antimicrobial resistance of major pathogenic strains from hematology department is high,antimicrobial agents should be used according to pathogenic distribution characteristics and antimicrobial susceptibility testing results,healthcare-associated infection control should be strengthened to reduce antimicrobial resistant rate.

Joint contracture is currently one of the very common diseases in rehabilitation medicine department.Once it occurs,it likely leads to such functional disturbances in the patients as restricted joint activities,decreased muscle strength around a joint and abnormal gait,seriously affecting the quality of life of the patients.Studies on its pathogenesis can help doctors better understand and treat the disease.In this paper,pathogenesis of the disease and progress in its therapy are summarized.

The current evaluation for scientific and technological achievements and innovation is mainly based on novelty retrieval report conducted by professional organizations.However, such retrieval could not measure the actual value of a scientific and technological achievements comprehensively, such as the practicality and economic value of the outcome;and possibility to be adopted by industry, etc.Current study, from the application aspective, was trying to evaluate the scientific and technological achievements using effectiveness appraisal theory, which emphasis on pre-ethical assessment, demand and adoption assessment, and economic value assessment.It reveals the special phenomenon that that the outcome of innovation may decay over time, however, the effectiveness of innovation would enhance over time.This study also designed a mathematical model and the empirical use.

Objective To investigate the expression level of miRNA-146a (miR-146a) in retinal pigment epithelial (RPE) cells aging and age-related macular degeneration (AMD),and discuss its regulation mechanism of AMD by repressing VEGF-A.Methods The expressions of miR-146 and VEGF-A were examined by qRT-PCR in RPE cells in mice aged 2 months,8 months,12 months,18 months or 24 months,and in RPE cells from 75 years old AMD patients.The protein level of VEGF-A was also detected by Western Blotting.Finally,the effects of overexpression of miR-146a in APRE-19 cell line on expression of VEGF-A was checked.Results MiR-146 was up-regulated to 8 times or 24 times at 18 months or 24 months aged mice,and the expression of VEGFA was down-regulated in aging RPE from 1.5 times to 0.8 times.However,the expression of miR-146 decreased to 14.5 times and VEGF-A increased in RPE cells of AMD.In cultured cells,overexpression of miR-146a inhibited the expression of VEGF-A.Conclusion Up-regulation of miR-146a in aging RPE cells and its down-regulation in AMD suggest a potential of miR-146a as molecular marker.MiR-146a overexpression inhibits the expression of VEGF-A,supporting a potential clinical treatment of miR-146 in AMD.