Objective: To research the application of dynamic-network probation in combination with traditional clinic probation in surgical practice teaching. Methods:Sixty four people in the undergraduate 2012(1, 2 session) set as the experimental group. 40 people in the undergraduate 2012(biochemical class) set as the control group. The traditional clinic probation was applied to the control group. The traditional clinic probation was applied to the control group. The dynamic-network probation in combination with traditional clinic probation was applied to experimental group. The teaching effects were evaluated and compared roundly. Results:The teaching effects of experimental group was significantly better than control group in all respects (x2=7.512, x2=6.797, x2=7.778, x2=4.768, x2=8.541;P<0.05). Satisfaction ratio of experimental group was significantly higher than that of control group in all respects of surgery teaching (x2=4.475, x2=5.900, x2=5.005, x2=5.904, x2=4.502; P<0.05). The examination performance of experimental group was significantly better than control group in theoretical knowledge and clinical skills testing (t=25.840, t=19.319;P<0.05). Conclusion:Dynamic-network probation in combination with traditional clinical probation has a great effect on surgical practice teaching and worth to be applied.

OBJECTIVE:To establish HPLC method for the simultaneous assaying of paracetamol and caffeine in ankahua_ngmin capsules.METHODS:The determination was performed on phenomenex luna C18 column under room temperature;the mobile phase consisted of methanol-water(24∶76) with a flow rate at 1.0ml/min,detecting wavelength at 215 nm and sensibility at 0.01AUFS.RESULTS:The linear ranges for paracetamol and caffeine were 50～250?g/ml(r=0.9 999) and 5.0～25?g/ml(r=0.9 999),respectively.The average recoveries were 100.7%(RSD=1.8%)and 101.4%(RSD=1.4%),respectively.CONCLUSION:This method is simple,rapid and accurate,which can substitute for titration in the assaying of ankahua_ngmin capsules.

Objective:To investigate the protection mechanism of adenosine A1 receptor agonist(2-chloro-N6-cyclopentyladenosine, CCPA)delayed preconditioning for rabbit myocardium during ischemia reperfusion.Methods:Thirty New Zealand male white rabbits were randomly assigned to Sham group,I/R group and CCPA group,with ten in each.Group CCPA was given CCPA 0.1 mg/kg before myocardial ischemia.Twenty-four hours later the I/R and CCPA underwent 40 min of coronary occlusion followed by 2 h of reperfusion.Blood samples were taken from arterial line at 20 min before occlusion(T)1,20 min after occlusion(T2),40 min after occlusion(T)3,1 h after reperfusion(T)4and 2 h after reperfusion(T)5for determination of the plasma levels of IL-10.At the end of the reperfusion,infarct size(IS)and area at risk(AAR)were defined by Evans blue and TTC staining.The heart was harvested and levels of the HSP70 were determined by Western blot analysis,and ultrastructures were observed under the electron microscopy.Results:The IL-10 and HSP70 levels of group CCPA was higher than those of group I/R.The CCPA(P

Objective:To investigate the effect of pcDNA3.1 vector on house keeping gene expression and set guide to further study work in using pcDNA3.1. Methods:5 cell lines were transfected with pcDNA3.1,48 h post transfection total RNA was extracted and applied for real time PCR to detect the RNA level of GAPDH、 ?-actin、18sRNA difference.Meanwhile,extract total protein and analyze the GAPDH and?-actin expression by Western blot.Results:RNA and protein levels all show of a decrease in 5 cell lines after transfection,with the most obviously ?-actin.Conclusion:pcDNA3.1 might have non specifinhibition effect to cell,when using pcDNA3. 1 for gene function research,it is not recommend to use ?- actin as reference gene.

Objective To investigate the feasibility and timing of laparoscopic cholecystectomy(LC) for the treatment of acute pancreatitis accompanying gallstones. Methods A retrospective analysis was made on clinical data of 21 patients with acute pancreatitis accompanying gallstones treated by LC between January 1999 and August 2003 in this hospital. Results The LC was performed 20~40 days after the onset of pancreatitis and 15 days after the recovery of serum and urinary amylase levels.An abdominal drainage tube was placed in 9 patients.Postoperative recovery was uneventful in 19 patients,who got out of bed on the surgery day or on the first postoperative day and began to take food 12 hours after operation,with the abdominal drainage tube removed 24~72 hours postoperatively and no complications encountered.Recurrence of acute pancreatitis happened in 2 patients on the 3 postoperative days and was relieved from symptoms with conservative treatment.The duration of postoperative hospital stay was 4~20 days(mean,7 days).Follow-up checkups in the 21 patients for 6 months ~ 5 years(mean,19 months) found no recurrence. Conclusions Laparoscopic cholecystectomy is feasible and safe for patients with acute pancreatitis accompanying gallstones in the period of 20~40 days after the onset of pancreatitis.Careful patient selection,proper peri-operative treatment,strict adherence to techniques,and use of postoperative drainage are considered essential.

Objective: To study the protective mechanism of Donepezil on apoptosis of PC12 cells induced by amyloid beta protein. Methods: PC12 cells were cultured as previously,then amyloid beta protein and Donepezil were used to treat PC12 cells.Morphology observation,TUNEL and immunocytochemistry were employed to investigate the damage of PC12 cells induced by A?,protection of Donepezil on apoptosis of PC12 cells and the expression of Bcl2 and Caspase-3 in A?-treated group and Donepezil-treated group. Results: A? induced apoptosis of PC12 cells in a dose-dependent way;Compared to the group treated with A? only and the group post-treated with donepezil, the apoptosis index of PC12 cells(17.29?0.83)% and expression of Caspase-3(26.46?2.87)% were significantly downregulated in the group pretreated with donepezil(P0.05). Conclusion: This study demonstrated that Donepezil can protect PC12 cells against apoptosis induced with amyloid protein,which was closely related to the time of interference.The mechanism of protection was involved with the expression of Bcl-2 and Caspase-3.

Objective To study the natural history of HIV infection among paid blood donors(PBD).Methods Two thousand three hundred and sixty four individuals infected with HIV/AIDS via blood donation in twelve villages of Henan province were included in this study,Retrospective data were analyzed in combination with a cross-sectional survey.Results The number of deaths were 709 among these 2 364 subjects under study by the end of 2004,with a mortality rate of 30.1%.Among 712 deaths,32.8% were companied with serious lung infections,18.1% were complicated with serious diarrhea,8.2%-with central nervous infections,8.2%-with cirrhosis,6.6%-with various types of cancers,3% died of suicide and 23% died with unclear cause.Of them 544 AIDS patients died before the ARV treatment was available in rural areas of Henan at the end of 2002,with a mortality rate of 23.0%.The median survival period for individuals with HIV infection was 9.5 years,and the median incubation period was about 8.5 years.Conclusion The median aurvival period for individuals with HIV infection via blood donation in rural areas of Henan was 9.5 years and the median incubation period was about 8.5 years among them.

Objective:To adopt the brain lesion model of mouse induced by overload aluminum to study the relationship between monoamine oxidase B disorder and neurodegeneration induced by overload aluminum(Al).Method:Aluminum overload models were established by injection of 3?l AlCl3 into lateral ventricle of miceeach day for 5d.The AlCl3 solutions injected in different modelswere with different concentrations and they were 0.125%,0.25%,0.5%.On d10,d20,and d30 after the final administration of AlCl3 solution,the learning and memory function of mice,pathomorphology of hippocampi,and MAO-B activity were determined.Results:Aluminum overload elevated MAO-B activity,caused karyopyknosis and loss of neurons in CA1 area of hippocampi,in dose-and time-dependent manners.Conclusion:The results indicate that neurodegeneration induced by Al toxicity may be related to the monoamine oxidase B homeostasis interfered by Al overload.

P-glycoprotein(P-gp)and CD44 have been characterized and are known to be determinants of multidrug resistance(MDR)and cancer metastases.Recent researches suggest that there is a correlation between P-glycoprotein(MDR)and CD44(invasion and metastases).A better understanding of any relationship between drug resistance and tumor metastasis may lead to more effective tumor treatment.

0.05);HIF-1?positive rate of control groups was higher than that in normal group and treatment group with significant difference among them(P0.05);VEGF positive rate in control groups was higher than that in normal group and treatment group with significant difference among them(P