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.

Objective To review the outcome of coronary artery bypass graft (CABG) using left internal thoracic artery grafts in the patients aged over 70 years old.Methods Two hundred and eighty-eight patients aged over 70 years old from January 2009 to January 2014 who underwent CABG were selected.All of the patients were divided into two groups on base of the graft:control group:only saphenous vein graft was used in 138 cases; observation group:the left internal thoracic artery to the left anterior descending artery was used in 150 cases,which also included total arterial grafting,facilitated by the use of the radial artery,right gastroepiploic artery was operated in 7 cases,beside these artery grafts,saphenous vein graft was used to anastomosis with other vessels.Results Operative mortality was 2.9％ (4/138) in control group and 2.0％ (3/150) in observation group,and there was no significance (P ＞ 0.05).The volume of blood drainage was larger in observation group [(796.2 ± 382.4) ml] than that in control group [(512.8 ± 387.5) ml],and there was significant difference (P ＜ 0.05).At the same time,there was no significant difference in the incidence rate of second thoractomy,malignant arrhythmia,stroke,poor wound healing,and usage of intraaortic balloon counterpulsation between two groups (P ＞ 0.05).Conclusion It does not increase the mortality and incidence of serious complications using the left internal thoracic artery to the left anterior descending artery in the patients aged over 70 years old during CABG.

Objective To observe the clinical effect of modified Hezhong Powder for the treatment of children mesentetic lymphadenitis.Methods Sixty children with mesentetic lymphadenitis were randomly divided into treatment group and control group,30 cases in each group.The control group was treated routine anti-inflammatory drug Cefaclor for Oral Suspension,and was given symptomatic treatment when necessary.The treatment group was given modified Hezhong Powder on the basis of treatment for the control group.The treatment course lasted for two weeks.After treatment,clinical efficacy and safety,and effects on relieving primary and secondary symptoms and on shortening the swollen lymph nodes were observed.Results (1) The total effective rate of the treatment group was 96.7％,and that of the control group was 83.3％,the difference being significant (P ＜ 0.05).(2) The treatment group had better effect on relieving the primary symptom of abdominal pain,and secondary symptoms of poor appetite,vomiting,abdominal distention and abnormal stool than the control group.The differences of time for the symptoms disappearing were significant (P ＜ 0.05).(3) After treatment,the swollen.lymph nodes of the two groups were shrunk(P ＜ 0.05),and the shrinkage in the treatment group was superior to that of the control group (P ＜0.05).(4) During the treatment,no obvious adverse reaction occurred in the two groups.Conclusion Modified Hezhong Powder combined with western medicine is effective and safe for the treatment of children mesentetic lymphadenitis,and its efficacy is superior to that of the western medicine alone.

Objective To investigate the clinical efficacy and safety of laparoscopic appendectomy for acute appendicitis.Methods Nighty-two cases of acute appendicitis were included in this study,randomly divided into observation group (n =46) and control group (n =46) according to the random number table method.The observation group was treated with laparoscopic appendectomy,and control group with the traditional open appendectomy treatment.We compared the two groups of cases in postoperative conditions and the level of WBC changes and 1d and 3d after operation.Results The operation time of the observation group was shorter than that of the control group (t=4.049,P＜0.05);there was no significant difference in lymph nodes (t=0.570,P＞0.05);the amount of bleeding was less than that of the control group (t=20.748,P＜0.05).The get-out-of-bed activity time in the observation group was faster than the control group (t=9.221,P＜0.05);eating time was faster than the control group (t=8.794,P＜0.05);the anus recovery exhaust time was faster than the control group (t=17.423,P＜0.05);hospital stay was shorter than the control group (t=13.479,P＜0.05);the complication rate was lower than that of the control group (t=13.883,P＜0.05).The levels of 1d and 3d WBC were lower in the observation group than that in the preoperative group (t=7.277,26.911,P＜0.05);the levels of 1d and 3d WBC in the observation group were lower than those in the control group at the same time (t=3.6189,17.827,P＜0.05);the 3d WBC level of the observation group was lower than that of 1d (t=20.732,P＜0.05).Conclusion Laparoscopic appendectomy is a safe and effective treatment for patients with acute appendicitis,and it is worthy of further clinical research.

Objective To observe the change of serum Omentin-1 in gestational diabetes mellitus(GDM)and to investigate its clinical significance.Methods Serum Omentin-1 level was detected in 85 cases of GDM and 85 matched cases of normal glucose tol-erance(NGT)by ELISA,the glycolipids biochemical indexes,inflammation indexes and fasting insulin (FINS)level were simultane-ous detected,then the insulin resistance index (HOMA-IR)was calculated in both groups.Results The levels of prenatal prepreg-nant BMI,FPG,hs-CRP,blood lipids,blood glucose,FINS and HOMA-IR in the GDM group were significantly higher than those in the NGT group,while serum Omentin-1 level was obviously lower than that in the NGT group,difference was statistically signifi-cant (P<0.05);when prenatal obesity and/or HOMA-IR≥2,the serum Omentin-1 levels was significantly decreased.Serum Omentin-1 level had significant positive correlation with HDL,and negative correlation with prepregnant BMI,prenatal BMI,FPG, FINS and HOMA-IR.The multiple stepwise regression analysis showed that prepregnant BMI,TG,FPG and FINS were independ-ent influencing factors of serum Omentin-1 in GDM.Conclusion Serum Omentin-1 is associated with GDM closely,which can re-flect the degrees of sugar,lipid metabolic disorder and insulin resistance in pregnant women,and may be involved in the occurrence and development of GDM.

Objective To investigate the predictive value of epicardial adipose tissue(EAT) thickness for the recurrence of atrial fibrillation (RAF) after concomitant valve replacement and bipolar radiofrequency ablation.Methods From January 2012 to May 2014,156 patients with permanent atrial fibrillation and organic valvular diseases underwent concomitant valve replacement and successful bipolar radiofrequency ablation in the First People's Hospital of Shangqiu.After 1 year of follow-up,the recurrence of AF was analyzed and the correlation factors were analyzed statistically.Results All patients completed a regular follow-up.During a 12-month follow-up period,RAF was observed in 39 patients (25.0％).Echocardiography-derived regional EAT thickness was significantly greater in RAF patients than that in non-RAF patients((6.9±0.6) mm vs.(5.5±0.7) mm,t=4.649,P＜0.05).The EAT thickness strongly correlated with patients age,body mass index,Ratio of left atrial diameter,mitral diastolic blood flow velocity and early diastolic velocity of mitral annulus,low density lipoprotein-cholesterol and thyroglobulin (r =0.62,0.57,0.68,0.59,0.73,0.76;P ＜ 0.05).Cox multivariable analysis showed that,duration of AF history (95％CI:1.01-1.15,P =0.040),left atrial diameter (95％CI:1.07-1.24,P =0.021) and EAT thickness (95％CI:1.05-1.79,P =0.009) were independent predictors of RAF.Conclusion Echocardiography-derived regional EAT thickness combined with left atrial diameter may serve as effective parameters in identifying patients at the highest risk for RAF.

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.

Lung cancer is the leading cause of cancer-related death in the world.PD-1 is a member of the CD28 family expressed on the surface of a variety of immune cells.PD-L1, one of PD-1 ligands, plays a pivotal role in the ability of tumor cells to evade the host immune system.A recent study showed that signaling via mutant EGFR in lung tumor cells upregulates directly tumor PD-L1 expression.In this review, the clinical significance of the PD-1/PD-L1 pathway in immunotherapy for non-small-cell lung cancer (NSCLC) and the relevance to targeted therapy were summarized.

Objective To explore a new evaluation framework for talented professionals in science and technology, and design an appropriate methodology and management mechanism.Methods Key evaluation indicators were set according to the organization′s strategic objectives and innovation elements.Following the introduction to new concepts of evaluation, methods and steps were designed that could analyze evaluation results using the radar chart to achieve full-dimensional identification of different indicators, scopes or levels.Results and Conclusion A pluggablehierarchical management mechanism was established, and an organic architecture that involved data, evaluation logics and operation management was constructed.A pilot study was carried out in an institution of military medical sciences to verify the applicability of this framework.