Antioxidants ; metabolism ; therapeutic use ; Bronchopulmonary Dysplasia ; drug therapy ; etiology ; metabolism ; Humans ; Hyperoxia ; complications ; Infant, Newborn ; Lung ; metabolism ; Reactive Oxygen Species ; metabolism

ObjectiveTo obtain the soluble expression of P protein of norovirus(NV)G Ⅱ. 2[P16]and analyze its antigenic characteristics.MethodsThe recombinant plasmid GⅡ.2-NV-pET-28a was constructed by optimizing the NV GⅡ.2[P16]P protein gene,synthesizing and cloning it into pET-28a(+)vector. The recombinant plasmid was transformed into DH5α competent cells,and the expression strain was optimized to make the P protein express in soluble form. The expressed P protein was purified by Ni-NTA affinity chromatography,of which the antigenicity was detected by Western blot,the purity was detected by size exclusion high performance liquid chromatography(SEC-HPLC),and the antigenantibody binding ability was identified by ELISA.ResultsThe target protein of recombinant BL21 Star(DE3)pLySs was highly expressed in soluble form. After purification by affinity chromatography,the purity of GⅡ.2 P protein was 95. 53%,and the antigenicity was good.ConclusionSoluble NV P protein was successfully prepared by prokaryotic expression strain,and the antigenicity of P protein was confirmed,which laid a foundation of the development of NV G Ⅱ.2[P16]detection kits and the recombinant subunit vaccines.

This article was aimed to study the pharmacokinetics of mussaenoside in rats. Gardenoside was used as the internal standard in the content determination of mussaenoside in rat plasma with HPLC. The chromatographic conditions were Diamonsil C18 (2) column (150 mm í 4.6 mm, 5 μm), mobile phase of methanol:0.5% glacial acetic acid (30:70), flow amount of 1.0 ml/min, detection wavelength at 238 nm, column temperature at 30℃. Compartment model fitting of average plasma concentration in rats - time data had been conducted after mussaenoside was given to mice through single intravenous injection with the help of DAS 2.0 pharmacokinetics intelligence analysis software. The results showed that the plasma concentration using 2-comparment model intravenous injection calculation method, which corresponded well to that of actually measured (weighting of 1), was proved superior to other models. The distribution half-life time (t1/2α) was 9.892 min and the elimination half-life time (t1/2β) was 55.384 min. It was concluded that the established method was convenient, accurate and stable, which can be used for the study on phar-macokinetics of mussaenoside. Mussaenoside was distributed rapidly in the body of rats. The main process of mus-saenoside in the body of rats was elimination. The metabolic rate was at moderate speed.

Objective To investigate the reasonable and effective administration ofdexmedetomidine for thoracic surgery anesthesia.Methods Eighty ASA Ⅰ-Ⅱ patients,aged 18-60 years old scheduled for elective thoracotomy were randomly assigned to 4 groups(each 20 patients).Group A:dexmedetomidine before anesthesia induction + bupivacaine before closed thorax cavity.Group B:dexmedetomidine before anesthesia induction + dexmedetomidine and bupivacaine before closed thorax cavity.Group C:0.9％ sodium chloride before anesthesia induction + bupivacaine before closed thorax cavity.Group D:0.9％ sodium chloride before anesthesia induction + dexmedetomidine and bupivacaine before closed thorax cavity.Mean arterial pressure (MAP) and heart rate (HR) were measured before infusing dexmedetomidine or 0.9％ sodium chloride (T0),after infusing dexmedetomidine or 0.9％ sodium chloride (T1),instant time after intubation (T2) and 3 min after intubation (T3),5 min after intubation (T4).The scores of visual analogue scale(VAS) and the consumption of analgesics were compared.Results There was no significant difference including gender,age,weight and operation time among four groups (P ＞ 0.05).Compared with T0,MAP and HR were significantly decreased at T1 in group A and group B (P ＜ 0.05),and were significantly increased at T2 in group C and group D (P＜ 0.05).Respectively compared with group A and group B,MAP and HR were significantly increased at T2,T3 in group C and group D (P ＜ 0.05).The scores of VAS in group B [(2.47 ± 1.43) scores] and group D [(2.00 ± 1.68) scores] were lower than those in group A [(4.78 ± 1.26) scores] and group C [(4.88 ± 1.62) scores] after operation 12 h.The times of using postoperative analgesics in group B [(0.6 ± 0.4) times] and group D [(0.8 ± 0.1) times] were significantly less than those in group A [(1.3 ± 0.5) times]and group C [(1.5 ± 0.4) times] (P ＜ 0.05).Conclusions Intravenous dexmedetomidine before anesthesia induction can control the effect of double-lumen endobronchial tube responses and make hemodynamics stable.Intercostal nerve block with 0.5 μ g/kg bupivacaine and 0.375％ dexmedetomidine can enhance the analgesia effect and prolong the analgesia time.

Diabetic microvascular disease is a severe complication of diabetes mellitus (DM).There are many hypoth-esis for its mechanisms.This overview aimed at effect of C-peptide,coagulant factors,platelet and D-dimer in dia-betic microvascular disease,and provided evidence for its prevention and treatment in clinic.

There were 461939 outpatient visits in Shanghai Tianping Primary Health Center from January to December 2010,the data were retrospectively analyzed based on the electronic outpatient record.The 20 most common illnesses accounted for 73.67％ of total outpatient consultations (340310/461 939),hypertension ranked the first position of all illnesses ( 21.06％ ) and followed by coronary heart disease (8.36％).Patients aged over 65y accounted for 72.35％ of all patients,the frequency of consultations was positively correlated with age of patients(P ＜0.01 ).The frequency of consultations varies according to the gender,age of the patients as well as the organ system involved (P ＜ 0.01 ).It can be concluded that the most frequently encountered illnesses in primary health center are common illnesses and chronic diseases.There are different needs for primary health service between genders and different age groups.

Objective To study the effect of articular step-off on knee joint contact pressures in fractures of the medial tibial plateau. Methods Eight specimens of embalmed adult knee joint were used to establish models of articular step-off of the medial tibial plateau by 0,1,2,3 mm respectively (Schatzker Ⅳ fracture) .The technique of pressure sensitive film was used to measure the contact pressures on the weight-bearing area of the knee joint in the 3 models. Results When the step-offs of medial tibial plateau were 0,1,2,3 mm,the average contact pressures on the lateral compartment were respectively 3.34 ± 0.06 MPa,3.48 ± 0.06 MPa,4.19 ± 0.05 MPa,4.19 ± 0.04 MPa,while the average contact pressures on the medial coMPartment were 4.04±0.17 MPa,4.57±0.20 MPa,5.64±0.20 MPa,5.64±0.19 MPa.When the step-off of medial tibial plateau was 2 mm,the average contact pressures on the medial and lateral plateaus increased by 39.6％ and 25.4％ compared with the 0 mm step-off,with statistically significant differences (P ＜0.05). Conclusions If the step-off of the medial tibial plateau reaches ≥ 2mm,open reduction and internal fixation should be indicated to prevent secondary traumatic arthritis.When the step-off of the medial tibial plateau is ＜ 2 mm,conservative treatment can be a proper choice.

Objective:To establish a method of in vitro cultivation of epithelial cells of keratocystic odontogenic tumors(KCOT).Methods: Tissue block and enzyme digestion techniques were used for primary cultivation of KCOT cells.The cells were grown in keratinocyte-serum free medium(K-SFM).The biological characteristics of the cultivated keratinocytes were identified by phase microscopic observation and by immunohistochemistry of cytokeratin,vimentin,cytokeratin10 and 14.Results: KCOT keratinocytes could survive for 30-50 days in K-SFM after passing 2-4 generations.Cells were polygon and showed typical slabstone-like appearance.Immunostaining showed positive staining for cytokeratin antibody,and negative for vimentin.Conclusion: KCOT epithelial cells could be serially cultured in vitro in K-SFM by techniques suggested in this study.

Weight increasing would happen with the control of glucose in diabetic patients,whether the application of insulin or that of oral medication.Long-term and effective weight control should be done in order to lower the mortality rate.A large number of studies have shown that the mortality rate has increased along with weight gain,especially death caused by cardiovascular disease.The following measures can be used:(1)Rational target should be formulated.It would be the best that weight decrease 0.5~1.0 kg every week.(2)Diet should be controlled.Low-calorie,high protein,low-fat diet can be used.(3)Exercise therapy:Aerobic exercise will be recommended.(4)Drug intervention treatment:Metformin or Thiazolidinediones drugs can be use,Sibutramine or Orlistat can be used in the patients with serious obesity.

Five stagnations are an important content of Plain Questions.Many doctors think highly of the treating principle,while overlook the other content.Through researches on Plain Questions,the author lays out the entire system,including the prevention and treatment for mild stagnation,the presymptom,changes on phenology,climate and human body for severe stagnation.