OBJECTIVE:To study the antioxidant effects of Scutellaria baicalensis(SBE)on the model mice with Alzheimer’s disease. METHODS:All mice were treated by D-gal (150 mg/kg) and NaNO2 (100 mg/kg) for 60 d to reproduce the AD model mice,ip,once a day. Totally 60 mice were randomly divided into normal control group(isovolumetric sodium chloride injection), model group (isovolumetric sodium chloride injection),estradiol (0.4 mg/kg) group,and SBE high,medium and low doses (500,250 and 125 mg/kg). The mice were intragastrically administrated while modeling except normal control group,once a day, for continuous 60 d. The superoxide dismutase(SOD),catalase(CAT)activities and malondialdehyde(MDA)content in brain tis-sue ,and glutathione peroxidase (GSH-Px) activity in serum of mice were determined. RESULTS:Compared with normal control group,the SOD,CAT activities in brain tissue,and GSH-Px activity in serum of mice in model group were decreased,MDA con-tent in brain tissue were increased,with significant difference(P<0.01 or P<0.05);compared with model group,the SOD,CAT activities in brain tissue and GSH-Px activity in serum of mice in SBE high and medium dose groups were increased,MDA content was decrease,with significant difference (P<0.01 or P<0.05). CONCLUSIONS:SBE can enhance the antioxidant capacity in AD model mice by a mechanism that may be related to the improvement of related oxidation indicators’levels.

ObjectiveTo investigate the expression of miR-155 in whole blood of patients with breast cancer and explore the possibility of miR-155 in whole blood as a marker of beast cancer. Methods65 cases (breast cancer:47 cases, non-breast cancer:18 cases) in Thyroid and Breast Surgery Department of No.1 People's Hospital of Huai'an from Dec 2010 to Apr 2011 were enrolled according to the selected criteria.Two milliliters anticoagulant blood were sampled to isolate total RNA.The expression level of miR-155 in whole blood was measured by real-time quantitative polymerase chain reaction (real-time qPCR)analysis.The relationship between the expression level of miR-155 in whole blood and the clinical pathological fearutres was analyzed.ResultsThe expression level of miR-155 in breast cancer patients was up-regulated compared with that in non-breast cancer patients(P ＜ 0.05).The expression level of miR-155 in patients with positive lymph nodes was up-regulated compared with that in patients with negative lymph nodes( P ＜ 0.05).The expression level of miR-155 in stage Ⅲ breast cancer was up-regulated compared with that in stage Ⅰ & Ⅱ breast cancer( P ＜ 0.05 ).The expression level of miR-155 in patients with positive ER and PR was down-regulated compared with that in patients with negative ER and PR breast cancer.Conclusion The study demonstrates that the expression of miR-155 in whole blood is related to clinical pathological features of patients with breast cancer and can be used as a potential marker of breast cancer.

{L-End}Objective To investigate the current status of sleep quality and its influencing factors among coal miners in a company in Shanxi Province. {L-End}Methods A total of 1 047 coal miners from a coal mine company in Shanxi Province were selected as the study subjects by convenient sampling method. The occupational stress, occupational burnout and sleep quality of the study subjects were investigated using Occupational Stress Core Scale, Maslach Burnout Inventory-General Survey and Pittsburg Sleep Quality Index Scale. {L-End}Results The detection rates of occupational stress, occupational burnout, sleep disorder were 58.9%, 59.1% and 57.9%, respectively. The result of multivariate logistic regression analysis showed that education level, alcohol consumption, work shift, duration of dust-exposure, phase of respiratory symptoms, self-assessment of health, occupational stress and occupational burnout were independent influencing factors of sleep disorders in the coal miners (all P<0.05). Among them, the risk of sleep disorders in drinkers was higher than that in non-drinkers (P<0.05); the risk of sleep disorders was higher in miners working in a rotating work shift with two shifts than in those with three shifts (P<0.05); the higher the education level, the longer the duration of dust-exposure, the more serious the phase of respiratory symptoms, the worse the self-assessment of health, the higher the degree of occupational stress and the higher the degree of occupational burnout, the higher the risk of sleep disorders (all P<0.05). {L-End}Conclusion The incidence of sleep disorders in coal miners in this company is relatively high. Occupational stress, occupational burnout, education level, alcohol consumption, work shift, duration of dust-exposure, respiratory symptoms and health status are risk factors for sleep disorders in coal miners.