Alzheimer's disease(AD)is a progressive neurodegenerative disease characterized by cognition impairment and behavioral abnormalities.While the mechanisms involved in AD remain unclear,various hypotheses have been proposed regarding pathogenesis of AD,among which the oxidative stress hypothesis has attracted more and more attention.In the present article,the relationship between oxidative stress and AD is reviewed,including sources of neuronal oxygen radical generation,the link of oxidative stress to pathogenesis of AD,preclinical and clinical studies of AD,therapeutic effects of antioxidants and phosphodiesterase inhibitors on AD.

BACKGROUND:Studies have shown that bone marrow mesenchymal stem cel transplantation can improve disease conditions by reducing inflammation.
OBJECTIVE:To explore the therapeutic efficacy of bone marrow mesenchymal stem cels on chronic asthma rats.
METHODS: A rat model of chronic asthma was established by intraperitonealy injected and aerosolized ovalbumin. After modeling, rats were given 4×105 and 8×105 bone marrow mesenchymal stem celsvia the tail vein, respectively. Thirty days later, the lung tissues were observed pathologicaly using hematoxylin-eosin staining; RT-qPCR and ELISA methods were employed to test the changes in interleukin-10, tumor necrosis factor-α and interferon-γ levels in lung tissue and peripheral blood, respectively.
RESULTS AND CONCLUSION:Rat models of chronic asthma were successfuly established after intraperitoneal injection of ovalbumin combined with aerosolized ovalbumin. After 30 days of cel treatment, the structure of lung tissues were obviously recovered, and the levels of interleukin-10, tumor necrosis factor-α and interferon-γ showed some improvement in lung tissue and peripheral blood, but there were no differences between the two groups. In conclusion, bone marrow mesenchymal stem cels show some potential role in the treatment of chronic asthma.

Objective:To prepare Cuochuang Xiaoyan lotion and establish HPLC fingerprint chromatogram for the quality control . Methods:The separation was performed on a Waters XTerra MS C 18column(250 mm ×4.6 mm, 5μm).The mobile phase consisted of acetonitrile-0.2%phosphoric acid with gradient elution at a flow rate of 1.0 ml· min-1 , the eluent was monitored by a UV detector at 277 nm, and the column temperature was at 30℃.Results: There were sixteen common peaks for the sample , and among them, three ones were identified as baicalin , linarin and rhein , respectively .Conclusion:The repeatability and information of chromatogram peaks of the method are satisfied , which can provide credible quality control method for Cuochuang Xiaoyan lotion .

Objective:To establish an HPLC method for the determination of baicalin and polydatin in Kanggan Liyan syrups. Methods:The samples were analyzed on an Waters SunFire C18 column with the mobile phase A of acetonitrile and the mobile phase B of 0. 2% phosphoric acid solution with gradient elution. The flow rate was 1. 0 ml·min-1 , the detection wavelength was 284nm,and the column box temperature was 30℃. Results:Baicalin and polydatin could be separated effectively without interference. The linear range of baicalin was 32. 0-480. 0 μg·ml-1 and the average recovery was 98. 71%(RSD=0. 67%,n=5). The linear range of poly-datin was 16. 0-240. 0 μg·ml-1 and the average recovery was 97. 02%(RSD=1. 03%,n=5). Conclusion:The method is accurate and stable, and can be used in the determination of Kanggan Liyan syrups.

Objective To investigate the effect of the general anesthesia combined with peridural anesthesia on hirschsprung's radical operation through children abdominoscope. Methods 40 children patients with hirschsperung were elective eradicative operated by using endotrachal intubation complex vein general anesthesia combined with continuons peridural anesthesia.ECG,HR,MAP,SPO 2,P ET CO 2 were monitored, and blood gas were recorded and analyzed before pneumoperitoneum,15 minutes and 40 minutes after pneumoperitoneum,1 minute after deflation,before decannulation at the operation termination.Results Compared with before pneumoperitoneum date,HR inereased obviously 40 minutes after pneumoperitoneum,and before decannulation at the operation termination,peak pressure in airway increased obviously after pneumoperitoneum,the difference was notable,SPO 2 decreased after pneumoperitoneum,the difference was also significant.pH decreased gradually with the time prolongation,there was obviously difference.The trend of P ET CO 2 and PaCO 2 changes were analogous,P ET CO 2 had much notable difference after pneumoperitoneum,PaCO 2 had notable difference at the operation termination,and before decannulation,it was decreased to the basic value.Conlusions Hirschsprung's Disease eradical operation using general anesthesia combined with peridural anesthesia under abdominoscope guide,can immobilize ill children completely,relieve pain perfectly,muscular relaxation satisfactory,the physical interference to body is little and less complication.

OBJECTIVE:To establish a HPLC method for the quantitative determination of loratadine(Lor),paracetamol(Par)and pseudoephedrine sulfate(Pse)in loratadine paracetamol pseudoephedrine sulfate sustained-release tablets(LPPST). METHODS:The HPLC method was carried out on Kromasil-C 18 column(250mm?4.6mm,5?m).The mobile phase consisted of a mixture of methanol-sodium acetate(0.82g in1000ml)(2000∶1000)for paracetamol with detection at243nm.The mo?bile phase consisted of a mixture of acetic acid-methanol-1%(V/V)sodium lauryl sulfate(0.1∶70∶30)for loratadine and pseudoephedrine sulfate with detection at257nm.RESULTS:The calibration curve was linear in the range of13.79～55.18?g/ml for paracetamol(r=0.9999),0.013～0.105mg/ml for loratadine(r=0.9999),0.30～2.37mg/ml for pseudoephedrine sul?fate(r=0.9999).The average recoveries were99.89%(RSD=0.43%),99.69%(RSD=0.20%)and99.57%(RSD=0.10%)for three above-mentioned components respectively(n=6).CONCLUSION:This method is accurate and reliable for the quality control of this compound preparation.

Objective To evaluate the clinical efficacy of laparoscopic radical prostatectomy.Methods A total of 11 cases of laparoscopic radical prostatectomy were enrolled in this study.Among the cases,transperitoneal approach was used in 4 patients,and extraperitoneal approach was employed in 7.The prostate,seminal vesicles,and ampulla ductus deferens were resected,and then the bladder was anastomosed with the urethra.Results The operation was successfully performed in all the patients with a mean operation time of 304 min(180-390 min),and a mean blood loss of 520 ml(300-1200 ml).The postoperative catheterization time and hospital stay were 12-28 d(mean,19.8 d)and 12-24 d(mean,20 d)respectively.No injuries to the rectum,urinary incontinence,or urethral stenosis occurred in this series.The patients were followed up for 1-36 mon(mean 11 mon),during this period,no local recurrence or distant metastasis were found.The postoperative PSA level was 0-0.05 ?g/L.Conclusion Laparoscopic radical prostatectomy is safe and effective for the treatment of prostate cancer.

Objective To study the scattering effect of Co-Cr-Mo hip prosthesis which was high Z material for patients undergoing pelvic irradiation.Methods The hip prosthesis was set in water phantom (30 cm×30 cm×30 cm), determing points were chosen on the entrance side of both 6 MV and 10 MV beams at the distance of 0.5 cm, 1.0 cm, 2.0 cm to the hip prosthesis, and also on the exit side of both 6 MV and 10 MV beams at the distance of 3.0 cm, 5.0 cm, 7.0 cm to the hip prostheses.Dose behind the hip prosthesis at depths of 5.0 cm and 10.0 cm for 6 MV and 10 MV beams are also measured.ResultsThe dose deviation on the beams′ entrance side is between 0 to 5.0%, the backscatter effect was more obviously with the higher energy beam.The dose deviation on the beams′ exit side was between 21.6%-30.8%.With the same field size and depth, dose deviation becomes smaller when the beam energy was higher;while with the same energy and depth, dose deviation becomes smaller when the field size was bigger.Dose profiles behind the head of the hip prosthesis indicate obvious attenuation of the beam.Conclusions Beam arrangements that avoid the prosthesis should be considered first or we should at least reduce the weight of the beam that pass through the prosthesis.

Objective To observe effect of abdomen compression on improvement of anal exsufflation for patients after abdomen operation. Methods Patients in the department of general surgery( 120 cases )after abdomen operations were randomly divided into the experimental group and the control group with 60 cases in each group.The control group adopted routine postoperative nursing,The experimental group received abdomen compression baaed upon routine nursing. Anal exsufflation time was compared between the two groups. Sults Anal exsufflation time of the experimental group undergoing different operations was earlier than that of the control group(P < 0.01 ). Conclusions Abdomen compression can bring forward anal exsufflation time,fa-cilitate the recovery of gastrointestinal function and normal diet, thus improve the rehabilitation of patients

OBJECTIVE:To compare therapeutic efficacy and safety of laparoscopy combined with dienogest and laparoscopy combined with dienogest and TCM in the treatment of endometriosis. METHODS:126 endometriosis patients were selected and divid-ed into control group and observation group,with 63 cases in each group. Control group received combined with dienogest(25 mg/time,qd);observation group was additionally given TCM on the basis of control group. Therapeutic efficacy,recovery time of ovula-tion,menstrual recovery time and ADR were compared between 2 groups,and recurrence and pregnancy of them were followed up for 2 years. RESULTS:The total effective rate of observation group (93.65%) was significantly higher than that of control group (80.96%),with statistical significance (P<0.05). The menstrual recovery time and recovery time of ovulation in observation group were significantly shorter than control group,with statistical significance (P<0.05). The incidence of ADR in observation group (9.52%)was significantly lower than control group(26.98%),with statistical significance(P<0.05);the recurrence rate of observa-tion group (4.76%) was significantly lower than that of control group (17.46%),with statistical significance (P<0.05). In 2-year follow-up,there were 23 pregnancy patients in observation group,which was significantly higher than that of control group (9 cas-es),with statistical significance (P<0.05). CONCLUSIONS:Laparoscopy combined with dienogest and TCM in the treatment of endometriosis have better clinical effect,higher safety and lower recurrence rate. The patients are easily pregnant.