Changes of spontaneous brain activity in end-stage renal disease patients: A study based on dynamic regional homogeneity / 西安交通大学学报(医学版)

【Objective】 To investigate dynamic regional homogeneity (dReHo) abnormality in end-stage renal disease (ESRD) patients by using resting-state functional magnetic resonance imaging (rs-fMRI). 【Methods】 A total of 26 ESRD patients and 26 healthy controls (HC) matched in gender, education level and age were included. Rs-fMRI scanning was performed in all subjects. All the subjects were tested by using auditory verbal learning test Huashan version (AVLT-H) and Montreal Cognitive Assessment (MoCA) to assess cognitive function before collection of MRI data. T-test was used to observe the difference in dReHo at global level between the two groups. Pearson and Spearman correlation analyses were made to estimate the correlation between abnormal brain regions and clinical scales. 【Results】 Compared with HC group, the dReHo value in ESRD patients reduced on the bilateral superior margin gyrus, left insula, left posterior central gyrus, and left putamen (P<0.05, replacement test correction). The dReHo values of left superior margin gyrus (r=-0.534, P=0.005) and left insula in ESRD patients (r=-0.422, P=0.032) were negatively correlated with the LR-S score, and the dReHo value of the left margin was negatively correlated with the SR-S score (r=-0.468, P=0.016). 【Conclusion】 There are abnormal dReHo values in several brain regions in ESRD patients during resting state, which is related to the patients’ cognitive function. The variation of dReHo value provides a new objective imaging basis for evaluating the cognitive function of ESRD patients.

Inhibitory effects of Genistein on hyperoxia-induced retinal neovascularization / 中华实验眼科杂志

Objective To investigate the effect of Genistein,a tyrosinase inhibitor,on retinal neovascularization in mice.Methods Thirty-six 7-day-old C57BL/6J mice were randomly assigned into hyperoxiainduced group,Genistein group,DMSO group and normal control group.The mice in the hyperoxia-induced group,Genistein group and DMSO group were fed in a static chamber with the oxygen volume fraction (75±2)％ for 5 days and then sent back to natural environment for 5 days to establish retinal neovascular models,and 1 μl Genistein diluted by 5％ dimethyl sulfoxide (DMSO) (400 mg/L) and 1 μl DMSO were intravitreally injected in the 12-dayold mice of Genistein group and DMSO group,respectively.The mice in the normal control group were bred in natural environment.The fluorescence angiography was carried out in 17-day-old mice (2 mice in each group) to prepare the whole retinal flatmounts,and the morphology of retinal vessels was observed under the fluorescence microscope.The other mice in various groups were sacrificed and the retinas were collected.The expressions of vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF) in mRNA and protein levels were detected by realtime fluorescence quantitative PCR and Western blot,respectively.The use and care of the mice complied with regulations for the management of laboratory animals.Results Retinal vessels were normal in the mice of normal control group.In the mice of the hyperoxia-induced group and DMSO group,retinal vessels were tortuous,and neovacularization and non-perfusion areas were visible.In the Genistein group,retinal vessels were clearly visible,but non-perfusion areas were exhibited.The relative expression levels of VEGF mRNA in retinas were 0.64±0.25,0.37±0.23,0.03±0.02 and 0.04±0.02,and the relative expression levels of bFGF mRNA in retinas were 21.40±3.07,17.22±2.63,0.52±0.25 and 0.67±0.23,in the hyperoxia-induced group,DMSO group,Genistein group and normal control group,and the expressions of VEGF and bFGF in mRNA level in the hyperoxia-induced group and DMSO group were significantly higher than those in the Genistein group and normal control group (all at P＜0.05).The protein expression levels of VEGF and bFGF were 1.01 ±0.05 and 0.97±0.06 in the hyperoxia-induced group,1.06±0.07 and 1.03±0.08 in the DMSO group,0.73±0.05 and 0.76±0.07 in the Genistein group,0.52±0.05 and 0.56± 0.05 in the normal control group.The expressions of VEGF and bFGF in protein level in the hyperoxia-induced group and DMSO group were significantly higher than those in the Genistein group and normal control group (all at P＜0.05).Conclusions Genistein can inhibit hyperoxia-induced retinal neovascularization may be by downregulating the expressions of VEGF and bFGF in retinas.

Construction and functional characterization of alentiviralvector mediating RNA interference of DEK gene / 军事医学

Objective To construct the lentiviral vector of RNA interference(RNAi) for DEK,and to detect its effect on breast cancer cell growth.Methods The DEK siRNA was designed and constructed based on DEK sequence using a lentiviral vector.The lentivirul vector containing DEK siRNA was named PSIH-H1-DEK as confirmed by PCR and sequenceing.PSIH-H1-DEK was then packaged with accessory plasmids into lentivirus in 293T cells and selected for 2 weeks with puromycin ( puro ) before the mixed colonies stably expressing DEK siRNA were obtained and the DEK expression was detected by real time PCR( RT-PCR) and Western blotting.The effect of DEK siRNA on ZR75-1 cell growth was determined by cell counting kit.Results Western blot and RT-PCR showed that PSIH-H1-DEK siRNA could suppress DEK gene expression.Suppression of DEK could markedly inhibit the growth of ZR75-1 cells.Conclusion The lentivirus-mediated DEK siRNA is obtained,which will facilitate further research on DEK function in breast cancer development.

Efffect of addition of low-dose rosiglitazone to sulphonylurea therapy on glycemic control in type 2 diabetic patients / 中华医学杂志(英文版)

<p><b>OBJECTIVE</b>We designed a multi-center, double-blind, randomized, parallel, with metformin controlled clinical trial to evaluate the efficacy and safety of low dose rosiglitazone combined with sulphonylurea therapy in type 2 diabetic patients who were inadequately controlled with sulphonylurea alone.</p><p><b>METHODS</b>Patients were treated with 4 mg rosiglitazone once daily plus sulphonylurea (test group) or 0.5 g metformin twice daily plus sulphonylurea (control group) for 12 weeks. The mean levels of HbA(1c), fasting and postprandial plasma glucose were recorded and compared between the two groups.</p><p><b>RESULTS</b>The mean levels of HbA(1c) decreased by 1.09% and 0.95% in the test group (n = 102) and control group (n = 96) respectively. Fasting and postprandial plasma glucose levels in the test group decreased by 25.0% and 35.6%, and in the control group, decreased by 17.7% and 23.8% as compared with the baseline (both P < 0.01). No liver damage was found.</p><p><b>CONCLUSION</b>Combination treatment of rosiglitazone and sulphonylurea can effectively improve glycemic control in type 2 diabetic patients inadequately controlled with sulphonylurea alone.</p>

Study of candidate genes in type 2 diabetes mellitus in Chinese Han populations in Shandong / 中华内分泌代谢杂志

Objective To investigate the relationship between polymorphisms of candidate genes 〔glucokinase (GCK) gene, NIDDM1(D2S140) gene, fatty acid bindingprotein2(FABP2)gene〕and type 2 diabetes mellitus (DM) in Shandong Chinese Han population. Methods Short tandem repeat (STR) region polymorphisms of GCK gene, NIDDM1 gene and FABP2 gene were analyzed with the polymerase chain reaction and polyacrylamide sequencing gel in 107 patients with type 2 diabetes mellitus and 105 normal subjects. The subjects studied were unrelated and they are Chinese Hans living in Shandong province and no diabetes family history was revealed. Results A5 allele of GCK gene and B2 allele of NIDDM1 gene were positively related with type 2 diabetes (RR=15.70, P0.05). Logistic regression analysis showed that A5 allele and B2 allele were among the risk factors of type 2 diabetes. Conclusion Polymorphic microastellite repeat markers at the glucokinase gene and the NIDDM1 (D2S140) gene locus are associated with type 2 diabetes in Chinese. The polymorphism at the FABP2 locus is not a genetic marker for type 2 DM in Chinese Hans.

Relationship between D2S140 gene polymorphism and type 2 diabetes mellitus / 中国糖尿病杂志

Objective To determine the relationship between the polymorphism of D2S140 gene and type 2 diabetes mellitus.Methods D2S140 region polymorphism were analyzed with the polymerase chain reaction and short tandem repeat methods in 103 subjects with type 2 diabetes mellitus and 105 nondiabetic subjects.All subjects were biologically unrelated Chinese without a family history of DM.Results There were 7 alleles ranging from 151bp to 163bp in all subjects.The frequencies were 0.01 to 0.37,2 alleles were more common in diabetic patients than in nondiabetic subjects (RR=16.04, P