Objective:To observe the hypoglycemic and weight loss effects of liraglutide in type 2 diabetes mellitus (T2DM) com-plicated with obesity, and explore new treatment strategies for T2DM complicated with obesity. Methods: Totally 38 T2DM patients complicated with obesity with dissatisfactory blood sugar control treated with oral hypoglycemic drugs or insulin were enrolled and divid-ed into group A ( overweight group, 28 kg·m-2 >BMI≥24 kg·m-2 , 18 cases) and group B ( obesity group, BMI≥28 kg·m-2 , 20 cases) according to the body mass index ( BMI) . Liraglutide was used in all the participants for 12 weeks. The height, weight, BMI,HbA1c, fasting blood glucose(FBG),2-hour postprandial blood glucose(2hPG), fasting insulin(FINS),2-hour postprandial in-sulin (2hPINS),fast-c peptide(FCP), 2-hour postprandial c-peptide(2hCP) and insulin resistance index (HOMA-IR), pancreaticβcell function index( HOMA-β) of the two groups were detected before and after the liraglutide treatment. Results:After the treatment with liraglutide, HbA1c, FPG, 2hPG, FCP,2hCP,HOMA-β,HOMA-IR were significantly decreased (P<0. 01) than before in the two groups, while there were no significant differences between the groups(P>0. 05). However, the body weight in group B was sig-nificantly lower than before (P<0. 01), while there were no significant change in group A(P>0. 05). Conclusion: Liraglutide can effectively control blood glucose level, ameliorate insulin resistance and obviously decrease the body weight in the T2DM patients com-plicated with obesity.

Objective To observe the effect of arsenic exposure to drinking water on thelevel of histone 3 lysine 4 trimethylation (H3K4me3) and histone 3 lysine 79 trimethylation (H3K79me3) in peripheral blood leukocytes of human,and to analyze the relationship between arsenic exposure and H3K4me3,H3K79me3 modification levels.Methods A cluster sampling survey was carried out in typical endemic arsenicosis areas of Shanxi and Jilin provinces.Two hundred eighty-one local residents with a drinking water age of ≥ 10 years were selected as the survey subjects.According to the arsenic content of drinking water,the tested population was divided into control group (water arsenic content ≤0.01 mg/L,60 cases),low water arsenic exposure group (＞ 0.01-0.05 mg/L,61 cases),medium water arsenic exposure group (＞ 0.05-0.10 mg/L,50 cases),and 110 cases of high water arsenic exposure group (＞ 0.10 mg/L).Drinking water samples,immediate urine samples and peripheral blood samples were collected from the subjects.Arsenic content in drinking water and urinary arsenic content were determined via the atomic fluorescence method;histone H3K4me3 and H3K79me3 in peripheral blood leukocytes were determined by dot blot hybridization (Dot Blotting).Results There were no statistically significant differences in age (61.50,60.00,59.50,59.50 years old),different gender (male:20,27,17,40 cases,female:40,34,33,70 cases),body mass index (BMI),smoking and drinking status between the control group,low,medium and high water arsenic exposure groups.Water arsenic content in the control group,low,medium and high water arsenic exposure groups (median:0.005,0.024,0.076,0.150 mg/L),urinary arsenic content (0.011,0.018,0.061,0.134 mg/L),and water arsenic cumulative exposure levels (0.342,1.641,5.273,7.716 mg) were compared between groups,the differences were statistically significant (H =256.041,88.615,218.610,P ＜ 0.01).In the control group,low,medium and high water arsenic exposure groups,the modification levels of H3K4me3 (0.100,0.059,0.083,0.083)and H3K79me3 (0.049,0.036,0.055,0.052) in peripheral blood leukocytes were not significantly different (H =1.488,2.097,P ＞ 0.05).The levels of H3K4me3 and H3K79me3 in peripheral blood leukocytes were positively correlated with water arsenic content,urinary arsenic content,water arsenic cumulative exposure levels (r =0.245,0.221;0.299,0.318;0.149,0.149;P ＜ 0.01 or ＜ 0.05);there was a positive correlation between H3K4me3 and H3K79me3 modification levels (r =0.811,P ＜ 0.01).Conclusion There is a positive correlation between arsenic exposure through drinking water and the levels of H3K4me3 and H3K79me3 in the peripheral blood leukocytes of the population,but it is necessary to expand the sample size for further study.