The aim of this study was to establish the methods to identify crystal form of dasatinib in tablets.X-ray powder diffraction(XRPD)and solid-state nuclear magnetic resonance(ssNMR)were used to analyze the crystal form of dasatinib in Sprycel? tablets and Yinishu? tablets.The results showed that monohydrate and anhydrate were identified in Sprycel? and Yinishu? tablets respectively;with no detectable anhydrate in Sprycel? tablets and no detectable monohydrate in Yinishu? tablets.The results of XRPD and ssNMR were consistent;and could be both applied in the crystal form identification of dasatinib in tablets.

Objective To observe the influence of N-myc downstream-regulated gene 2 (NDRG2) on the growth and invasive ability of human colon cancer cell line SW620,and to explore its mechanism.Methods pcDNA3.1-NDRG2 and siRNA-NDRG2 were transfected transiently respectively into SW620 by Lipofectamine TM 2000,untreated cells as the control group.Western blotting was used to investigate the expression of NDRG2 and matrix metalloproteinase-2 (MMP-2).Matrigel invasion assay was used to study the invasive abilities of SW620 cells in all groups.The growth curve was determined through 3-(4,5-dimethyl-2-thiazoly)-2,5-diphenyl-2H-tetrazolium bromide method.Result After transfecting pcDNA3.1-NDRG2 into the SW620 cells,the protein level of NDRG2 increased and the expression of MMP-2 declined markedly.After transfecting siRNA-NDRG2 into the SW620 cells,the protein level of NDRG2 declined and the expression of MMP-2 increased markedly.In addition,compared with the control group (75.80 ± 4.82),the numbers of transmembrane cells in pcDNA3.1 group (56.20 ± 7.40) and in siRNA group (94.20 ± 9.23) were significantly different (t =13.102,P =0.000;t =11.820,P =0.000).The growth curve showed that:compared with the control group (0.67 ±0.01),the absorbance of the fifth day after transfection in pcDNA3.1 group (0.46 ±0.01) and in siRNA group (0.91 ± 0.02) were different significantly (t =9.561,P =0.000;t =10.922,P =0.000).Conclusion NDRG2 can reduce the invasion and proliferation ability of colon cancer cell SW620,and its mechanism may be related to the down-regulation of MMP-2 expression.

AIM:To study the protective effect of aqueous extract of 2-branched and 3-branched velvet antler on cisplatin (CDDP)-induced nephrotoxicity in mice .METHODS:The mouse model of renal injury was induced by intra-gastric administration of CDDP at the dose of 15 mg/kg.After treatment, kidney index (KI), serum creatinine (SCr), blood urea nitrogen (BUN), the activity of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px), and the content of malondialdehyde ( MDA) in the kidney were determined .The renal pathological changes were observed with HE staining.RESULTS:Aqueous extract of velvet antler at the tested dose markedly decreased BUN , SCr and the content of MDA, and elevated the activity of SOD and GSH-Px in the mice pretreated with CDDP ( P<0.05) .The pathological chan-ges of the renal tissues were improved obviously , and the injury of the epithelial cells of renal tubules was mitigated .The effect of the aqueous extract of 2-branched velvet antler on renal function and cisplatin-induced nephrotoxicity was better than that of 3-branched one at the same concentration .CONCLUSION: The aqueous extract of 2-branched and 3-branched velvet antler has a certain protective effect on cisplatin-induced nephrotoxicity , which may be associated with in-creasing the anti-oxidative capability of mouse renal tissue .

Objective To investigate the protective effects and its mechanism of rebamipide on aspirin-induced injury in human gastric mucosal epithelium cells (GES-1).Methods GES-1 cells monolayer culture model was established in vitro.Then the cells were divided into negative control group,aspirin injured group and combination of rebamipide at different concentration (0.2,0.5,1.0 mrnol/L) and aspirin groups.The cell proliferation,the content of malondialdehyde (MDA) and the activity of superoxide dismutase (SOD) of each group were detected.The ultrastructural changes of each group were observed by transmission electron microscopy (TEM).The expressions of nuclear factor erythroid 2-related factor 2 (Nrf2) and heme oxygenase-1 (HO-1) at protein level in the cells of each group were detected by Western blot.Nrf2 interfering suppression test was performed and then the influence of Nrf2 small interfering RNA (siRNA) on the expression of HO-1 protein was observed.One-way analysis of variance was performed for comparison among multi-groups and t-test was used for comparison between the two groups.Results The cell viability of aspirin injured group and combination of rebamipide at different concentration (0.2,0.5,1.0 mmol/L) and aspirin groups were (49.56±3.88)％,(59.34±4.36) ％,(70.79 ± 5.96) ％ and (86.07 ± 5.20) ％,respectively,and the difference was statistically significant (F=30.634,P＜ 0.01).Compared with aspirin injured group,the content of MDA significantly lowered in combination of rebamipide at different concentration (0.2,0.5,1.0 mmol/L) and aspirin groups ((2.26±0.25) nrnol/rng vs (1.85±0.13) nmol/mg vs (1.62±0.11) nmol/mg vs (1.13±0.15) nmol/mg),and the difference was statistically significant (F=23.821,P＜0.05).Compared with aspirin injured group,the activity of SOD significantly increased in combination of rebamipide at 0.5 and 1.0 mmol/L and aspirin groups ((8.49±0.89) U/rng vs (11.50±1.03) U/mg vs (13.74±0.76) U/mg),the difference was statistically significant (F=25.666,P＜0.05).Under TEM,the cell ultrastrucmral was obviously inured in aspirin treated,while rebamipide could relieve the injury.The differences of relative expression quantity of Nrf2 and HO-1 at protein level among combination of rebamipide at 0.2,0.5 and 1.0 mmol/L and aspirin groups and aspirin injured group were statistically significant (0.35±0.04 vs 0.46± 0.05 vs 0.84±0.08 vs 0.15±0.02,0.72±0.09 vs 0.93±0.11 vs 1.29±0.14 vs 0.39±0.07,F=92.550and 38.235,both P＜0.05).After transfected with Nrf2 siRNA,the expression of HO-1 was 0.38±0.04 in aspirin injured group and 0.62±0.08 in combination of rebamipide and aspirin group,which was lower than that before transfection (0.61 ± 0.05,1.33± 0.09),respectively.The differences were statistically significant (t =6.276 and 10.444,both P＜0.05).Conclusion Rebamipide may activate Nrf2/HO-1 pathway and relieve aspiriwinduced oxidative stress in GF1 ceils.

Objective To study the optimal laparoscopic procedure and its indication for remove of common bile duct stone. Methods Analysis was made on the clmical data of 124 cases of laparoscopic choledocholithotomy and T tube drainage in our center.Results 82 patients underwent the improved laparoscopic procedure, alternation to open operation in 4 cases (4.9%),and the mean operating time was (80?30) min. While 42 patients were operated with traditional laparoscopic method,changing to open operation in 6 cases (14.3%),and the mean operating time was (170?40) min . The improved method could shorten the operation time and reduce the open operation rate significantly than traditional method did (P

AIM: To investigate the effects of sodium ferulate on cholesterol and triglyceride metabolism in atherosclerosis with hyperlipidemia.METHODS: The rabbit model of atherosclerosis was produced by feeding high lipid forages.RAW264.7 foam cell and HepG2 injured cell models were established by incubation with oxidized low density lipoprotein(ox-LDL).The atherosclerotic plaque area was measured,and serum lipids were detected.The cellular lipid accumulation was examined by oil red O staining.The cellular contents of total cholesterol and cholesterol ester were quantified by high performance liquid chromatography.The hepatic lipase(HL) mRNA expression was determined by RT-PCR.RESULTS:(1) Compared with hyperlipid group,the aorta atherosclerosis plaque area and the serum triglyceride level were significantly decreased in sodium ferulate-treated rabbits,but the serum cholesterol level showed little change.(2) Compared with ox-LDL group,the HL mRNA expression in HepG2 cells was enhanced significantly in sodium ferulate-treated group,but the cellular contents of total cholesterol and cholesterol ester in RAW264.7 foam cells showed little change.CONCLUSION: Sodium ferulate inhibits the formation of atherosclerotic plaque in high-cholesterol-fed rabbits aorta.This antiatherosclerotic function may reduce serum triglyceride level through enhancing the expression of HL mRNA without influencing serum cholesterol level and foam cell formation.

Objective:To analyze the application of Chronic Obstructive Pulmonary Disease (COPD) Screening Questionnaire and pulmonary function test in dust-exposed migrant workers.Methods:In May 2019, 149 cases of dust exposed migrant workers were selected as the research subjects through the free clinic in the countryside. COPD Screening Questionnaire and lung function test were carried out to analyze the high-risk groups and the influencing factors of positive pulmonary function test results.Results:Among 149 cases of dust-exposed migrant workers, 107 (71.8%) were positive for questionnaire screening, 73 (49.0%) were positive for pulmonary function test, 75 (50.3%) were diagnosed with coal worker's pneumoconiosis, and 101 (67.8%) were diagnosed with lung function injury. The positive rate of pulmonary function of migrant workers with positive questionnaire screening results was significantly higher than that of those with negative results ( P<0.05) . The results of multivariate analysis showed that compared with non-pneumoconiosis, the risk of positive pulmonary function test results was higher in dust-exposed migrant workers with stage Ⅲ pneumoconiosis ( OR=16.462, 95% CI: 3.390-79.946; P<0.01) . Compared with non-smoking, the risks of positive pulmonary function test results of dust-exposed migrant workers with smoking index of 11-20 package years and >20 package years were higher ( OR=19.814, 95% CI: 3.854-101.883; OR=9.733, 95% CI: 2.310-41.008; P<0.01) . Conclusion:The risk of COPD in dust-exposed migrant workers is high, so we should strengthen the early examination of the high pneumoconiosis stage and smoking population. The screening questionnaire can better screen out the high-risk groups of COPD, and it can be used as a basic screening tool.

Objective:To analyze the application of Chronic Obstructive Pulmonary Disease (COPD) Screening Questionnaire and pulmonary function test in dust-exposed migrant workers.Methods:In May 2019, 149 cases of dust exposed migrant workers were selected as the research subjects through the free clinic in the countryside. COPD Screening Questionnaire and lung function test were carried out to analyze the high-risk groups and the influencing factors of positive pulmonary function test results.Results:Among 149 cases of dust-exposed migrant workers, 107 (71.8%) were positive for questionnaire screening, 73 (49.0%) were positive for pulmonary function test, 75 (50.3%) were diagnosed with coal worker's pneumoconiosis, and 101 (67.8%) were diagnosed with lung function injury. The positive rate of pulmonary function of migrant workers with positive questionnaire screening results was significantly higher than that of those with negative results ( P<0.05) . The results of multivariate analysis showed that compared with non-pneumoconiosis, the risk of positive pulmonary function test results was higher in dust-exposed migrant workers with stage Ⅲ pneumoconiosis ( OR=16.462, 95% CI: 3.390-79.946; P<0.01) . Compared with non-smoking, the risks of positive pulmonary function test results of dust-exposed migrant workers with smoking index of 11-20 package years and >20 package years were higher ( OR=19.814, 95% CI: 3.854-101.883; OR=9.733, 95% CI: 2.310-41.008; P<0.01) . Conclusion:The risk of COPD in dust-exposed migrant workers is high, so we should strengthen the early examination of the high pneumoconiosis stage and smoking population. The screening questionnaire can better screen out the high-risk groups of COPD, and it can be used as a basic screening tool.

Objective: The present study aimed to investigate the effect of seasonal variation on neurotransmitter release in the hippocampus of normal rats and rats with pineal excision. Methods: Two time points, the summer and winter solstice, which are the longest and shortest days of the year, respectively, were selected. Male Sprague-Dawley rats that underwent a sham operation without pineal excision were included as a control group. The concentrations of 5-hydroxytryptamine (5-HT) and γ-aminobutyric acid (GABA) were determined by radioimmunoassays and enzyme-linked immunosorbent assays, respectively. Results: In the winter, the 5-HT and GABA levels in normal rats exhibited a significant difference compared with those in the operation group (P < .01). A difference was also noted in GABA levels be-tween the normal group and the sham operation group (P<.05). The concentrations of 5-HT and GABA in the hippocampal tissues of the normal group exhibited a seasonal rhythm consisting of elevation during the summer and reduction during the winter (P < .01), while the GABA levels in the sham operation group exhibited a significant difference, with elevation during the summer and reduction during the winter (P<.01). In the operation group, GABA showed the same trend (P<.01). Conclusion: The seasonal rhythm of neurotransmitter secretion by the hippocampus (5-HT and GABA) consisted of elevation during the summer and reduction during the winter. During the winter, the pineal gland exhibited a reverse regulatory effect on the secretion of 5-HT and GABA in the hippocampus, and it exhibited seasonal selectivity with regard to the regulation of 5-HT.

Objective This study aimed to evaluate the associations of serum folate and/or vitamin B12 concentrations with obesity among Chinese children and adolescents. Methods A cross-sectional study was conducted including 3,079 Chinese children and adolescents,aged 6 to 17 years,from Jiangsu,China.Anthropometric indices,such as,children's body mass index(BMI),BMI z-scores,waist circumference,and waist-to-height ratio were utilized.Multivariable linear regression and generalized additive models were used to investigate the associations of serum folate and vitamin B12 levels with anthropometric indices and odds of obesity. Results We observed that serum vitamin B12 concentrations were inversely associated with all anthropometric indices and the odds of general obesity[odds ratio(OR)= 0.68;95%confidence interval(CI)= 0.59,0.78]and abdominal obesity(OR = 0.68;95%CI = 0.60,0.77).When compared to participants with both serum vitamin levels in the two middle quartiles,those with both serum folate and vitamin B12 levels in the highest quartile were less prone to general(OR = 0.31,95%CI = 0.19,0.50)or abdominal obesity(OR = 0.46,95%CI = 0.31,0.67).Conversely,participants with vitamin B12 levels in the lowest quartile alongside folate levels in the highest quartile had higher odds of abdominal obesity(OR = 2.06,95%CI = 1.09,3.91). Conclusion Higher serum vitamin B12 concentrations,but not serum folate concentrations,were associated with lower odds of childhood obesity.Children and adolescents with high levels of vitamin B12 and folate were less likely to be obese.