Overexpression of Nampt induced cardiac hypertrophy by activating NF-κB / 中国药理学通报

Aim To examine the effect of Nampt over-expression on cardiac hypertrophy,and elucidate the role of NF-κB.Methods The cultured neonatal car-diomyocytes were pretreated with 100 μmol · L-1 PE or transfected with Nampt.The mRNA and protein ex-pression of Nampt were determined by Real-time PCR and Western blot respectively.The cardiomyocyte hy-pertrophy was monitored by measuring cell-surface area and the mRNA levels of ANP and BNP,which were biomarkers of hypertrophic response.Moreover,we te-sted the effects of Nampt on NF-κB-dependent tran-scription activity through luciferase reporter gene as-says.Results Nampt overexpression significantly in-creased cardiomyocyte surface area and the mRNA ex-pression of ANP and BNP.In addition,Nampt overex-pression could markedly increase NF-κB-dependent transcription activity. Moreover, when p65 was knocked down,cardiomyocytes with Nampt overexpres-sion could not induce cardiac hypertrophy.Conclusion Overexpression of Nampt induces cardiac hypertro-phy by increasing NF-κB-dependent transcription activ-ity.

Study on the correlation between oxidative stress and diabetic complications / 中国基层医药

Objective To explore the correlation between oxidative stress and the occurrence and progression of diabetic complications in the patients with diabetes. Methods The content of 24 h urinary 8-hydroxy-deoxyguanosine (8-OhdG) in diabetes mellitus (DM) group, diabetic nephropathy (DN) group, diabetic retinopathy (DR)group, diabetic foot(DF) group, diabetic neuropathy (DNP) group and control group were detected, and analyzed. Results The content of 24 h 8-OhdG in DM group, DN group, DR group, DF group, DNP group were significantly higher than that in the control group (P ＜ 0.01), and that in DN group, DR group, DF group, DNP group were significantly higher than that in DM group(P ＜ 0. 01), but the content of 24 h 8-OhdG among DN group, DR group, DF group and DNP group was not statistically signiticant(P ＞0. 05). Conclusion The correlation between the occurrence of diabetic and its complications oxidative stress and the Ievel of oxidative stress in the body was positive related.