AIM:To compare the mutant prevention concentration(MPC)of linezolid and vancomycin against methicillin resistant staphylococcus aureus(MRSA)and study the correlation between minimal inhibitory concentration(MIC)and MPC.METHODS:MICs and MPCs of two drugs against 35 MRSA clinical stains were determined by agar plates dilution method.The correlations between MIC and MPC were determined by linear regression.The ability to restrict the resistance was evaluated according the pharmacokinetics of two drugs.RESULTS:The MPCs of two drugs against MRSA were 16 and 8 ?g/mL and the MPC/MIC was 8.MPCs and MICs correlated poorly(R2 were 0.32 and 0.008,respectively).According to pharmacokinetics of two drugs,the concentration of linezolid was inside the MSW(mutant selective window)for the entire dosage interval,while the concentration of vancomycin exceeded the MPC for the most dosage interval.CONCLUSION:The capacity of vancomycin for restricting the selection of MRSA resistant mutants is stronger than that of linezolid.There is low correlation between MPC and MIC.

Clinical trials for medical research subjects of protection in China is still the researchers and sub-jects′cognitive biases, informed consent to carry out the difficult and the lack of follow-up tracking examination questions.Based on the experience and the domestic exploration of a hospital, put forward the Suggestions of per-fecting our country′s subjects protection: establish multi-sectoral cooperation of the subjects protection system, improve the legal consciousness and the consciousness of the subjects, the ethics committee should be field trips, build system of compulsory insurance, adverse drug reaction relief system is established.

Objective:To retrieve and analyze the relevant literatures on vancomycin added into bone cement to provide the evi-dence for the treatment of osteomyelitis and other orthopedic infections. Methods:Search strategy and criteria of inclusion and exclu-sion for literatures were designed. PubMed, SCI, Embase, CNKI, VIP and the other databases were searched, and the articles from the establishment date to February 2014 were statistically analyzed using bibliometric methods. The final included documents were sta-tistically analyzed in respect of the article type, year, contents, citation frequency and the maln contents of the study. Results:A total of 1 941 articles were searched, and 430 of them were in the final inclusion. The total number of the articles in every year was in an es-calating trend. The paper focused on the research and analysis of clinical studies, and there were 74 clinical studies among the includ-ed literatures, which accounted for 17. 2% of all the included literatures. The highest citation frequency was 97 for one literature. The research included the overall situation, year distribution, publishing country, research type analysis, corresponding author and their in-stitutions, journals, citation frequency, and the maln content of work and clinical studies on vancomycin added into bone cement. The analysis could provide reference for the clinical treatment of orthopedic diseases. Conclusion: The results of the analysis show that vancomycin added into bone cement in the treatment of chronic osteomyelitis is effective with high security, and the technology is ma-ture.

The paper introduces technologies related to data mining , including the feature selection , outlier detection model , cluste-ring model, association rule model, classification model, ensemble learning algorithm, etc.It makes detailed explanation of the applica-tion of data mining in the diagnosis , prognosis and management of clinical malignant tumors .

Objective:To evaluate of the feasibility of low-dose CT(LDCT)in the reconstruction of three-dimensional(3D)model of maxillofacial hard and soft tissues.Methods:Lightspeed 16-slice spiral CT scanner was used to scan one adult cadaveric head specimens with conventional parameters(280 mA)and low dose parameters(200,150,100,50,35,25,15 and 5 mA)respectively;the 3D model of the hard and soft tissues were reconstructed with Mimics 10.01 software,and 3D comparison were carried on with Geomagic 11.0 software.A comparison of the surface morphology of the hard and soft tissues of the 3D models with different scanning parameters was made.Results:With the reduction of the tube current,the model surface became rough gradually.Compared with the 280 mA scan results,the model surface produced by 35 mA scanning was still fairing,when the dose fell to less than 25 mA,the model surface became rough and the exact shape of the model could not be recognized.The same results of model surface were pro-duced after registration.Conclusion:The low-dose (35 mA)CT can be used to reconstruct 3D model of the maxillofacial hard and soft tissues.

The paper introduces the current situation of hospital operation index statistics,explores the design of hospital operation index set based on the standards,an index system with 3-layer architecture based on the data platform and the application modules of the index set.The development and application of this system ensures the consistent calculation,highly efficient utilization and shared reuse of statistical indexes and makes the hospital data services more orderly,efficient and accurate.

Humans ; Infant ; Male ; Pulmonary Alveolar Proteinosis

Objective To establish a method of inducing dendritic cells(DC)from rat bone marrow cells in vitro,and identify the phenotype and function characteristics.Methods The rat bone malToW cells were collected and cultured in vitro under the condition of recombinant rat GM-CSF(rrGM-CSF)and recombinant rat IL-4(rrIL-4).After 2 weeks,the morphological character of DCs was observed under light microscope and scanning electron microscope.Expression of MHC-Ⅱ,CD80 and CD86 were detected by flow cytometry.The ability to stimulate allogenic T cells of the cultured DCs was detected by mixed lymphocyte reaction.Results DCs showed typical morphology with elongated dendritic processes under inversion microscope and scanning electron microscope.DCs at day 6 revealed immature phenotype,including MHC-Ⅱ(29.03 ±4.39)%,CD80(21.98±7.08)%and CD86(25.94±6.80)%.DCs at day 12 showed higher expression of MHC-Ⅱ(74.05±5.97)%,CD80(79.85±6.53)%and CD86(81.00±7.47)%,and stimulatory capacity of allogenic T cells,compared with that in DCs at day 6.Conclusion Matured DCs could be generated from rat bone marrow cells and attendance with rrGM-CSF and rrIL-4,which present the feasibility for further research on its application to allograft immunorejection.

OBJECTIVETo observe effects and mechanism of Dinggui gel paste analgesic anti-inflammatory.

METHODSEighty-four male KM mice weighted from 18 to 22 g and aged 4 to 5 weeks were randomly divided into 7 groups, named blank group, model group, matrix control group, Votalin group, high dosage of Dinggui gel paste group with group, equivalent dosage of Dinggui gel paste group, Dinggui gel paste group, 12 mice in each group. Except blank and model group, the other groups were paste ointment for 7 days, and one time a day, matrix control group were pasted isodose blank matrix gel patch. Pain threshold were tested at 30, 60, 90 and 120 min after the last ad-ministration. Hot plate test were performed by injection of 5% formalin for 20 µL on right hindfoot sole after the last administration. The cumulative time of mice licking right rear foot were observed at stage of I and II, and content of IL-1, TNF-α were tested by ELISA method. Differences of weight between right and left ears were measured by ear swelling method and anti-inflammation experiment.

RESULTSIn hot plate test at 90 min, pain threshold in equivalent dosage of Dinggui gel paste group was (24.87 ± 14.67) s and (15.28 ± 8.23) s in model group; (26.33 ± 15.45) s in high dosage of Dinggui gel paste group and (15.31 ± 5.02) s in model group at 120 min in hot plate test, there were no statistical differences between two groups. Pain period at stage I, licking cumulative time in high dosage of Dinggui gel paste group was (66.70 ± 22.83) s and (101.80 ± 33.65) s in model group,and had significant differences between two groups; there were statistical differences in licking cumulative time at stage I of pain period among high dosage of Dinggui gel paste group (51.30 ± 43.60)s, equivalent dosage of Dinggui gel paste group (64.00 ± 47.27) sand model group (109.50 ± 36.78) s. Content of IL-1 in model group was (28.70 ± 8.24) ng/L and (13.33 ± 2.20) ng/L in high dosage of Dinggui gel paste group, there was obvious meaning between two groups; There were significant differences in TNF-α content among model group (93.60 ± 23.65) ng/L,high dosage of Dinggui gel paste group (63.21 ± 10.54)ng/L and equivalent dosage of Dinggui gel paste group (72.69 ± 16.26) ng/L; while there were no statistical meaning in ear swelling degree among model group (5.73 ± 0.80) mg,high dosage of Dinggui gel paste group (5.42 ± 0.68) mg and equivalent dosage of Dinggui gel paste group (4.98 ± 1.52) mg.

CONCLUSIONDinggui gel paste could increase pain threshold, reduce licking accumulative time, and decrease ear swelling degree, and relief pain by regulating level of TNF-α and IL-1.

Analgesics ; administration & dosage ; Animals ; Anti-Inflammatory Agents, Non-Steroidal ; administration & dosage ; Dosage Forms ; Drugs, Chinese Herbal ; administration & dosage ; Humans ; Interleukin-1beta ; genetics ; immunology ; Interleukin-6 ; genetics ; immunology ; Male ; Mice ; Ointments ; Pain ; genetics ; immunology ; Pain Management ; Tumor Necrosis Factor-alpha ; genetics ; immunology

Objective:To construct a RNAi lentiviral vector targeting rat CD80 gene and detect its effect of gene silencing in NRK and IEC6 cells.Methods:The effective sequence of siRNA targeting rat CD80 gene was confirmed in our previous work.Oligo-DNA fragment containing short hairpin frame was synthesized and reannealed,and then cloned into pGCSIL-GFP lentiviral expression vector.PCR and sequencing analysis were made for verifying the positive clones.The virus packaging plasmids were transfected into 293T cells to harvest shRNA lentivirus.After infection in NRK and IEC6 cells,Real-time PCR was performed to determine the expressing level of CD80.Results:PCR and sequencing revealed that shRNA plasmids was correctly constructed.Virus with a titer of 4×10~8 TU/ml was successfully packaged.CD80 expression in NRK and IEC6 cells could be knockdown by virus infection as characterized by 66.9% and 63.5% decrease of CD80 mRNA in NRK and IEC6 cells respectively,compared with negative control lentivirus.Conclusion:The recombinant lentiviral shRNA expressing vector targeting rat CD80 gene has been successfully constructed and packaged.CD80 mRNA could be down-regulated availably in NRK and IEC6 cells.