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Dehydrozingerone inhibits renal lipotoxicity in high-fat diet–induced obese mice
Journal of Cellular and Molecular Medicine ( IF 5.3 ) Pub Date : 2021-08-12 , DOI: 10.1111/jcmm.16828
Eun Soo Lee 1, 2 , Jeong Suk Kang 3, 4 , Hong Min Kim 5 , Su Jin Kim 6 , Nami Kim 7 , Jung Ok Lee 6 , Hyeon Soo Kim 6 , Eun Young Lee 3, 4 , Choon Hee Chung 1
Affiliation  

Ectopic fat accumulation in the kidneys causes oxidative stress, inflammation and cell death. Dehydrozingerone (DHZ) is a curcumin analog that exhibits antitumour, antioxidant and antidiabetic effects. However, the efficacy of DHZ in diabetic nephropathy (DN) is unknown. Here, we verified the efficacy of DHZ on DN. We divided the experimental animals into three groups: regular diet, 60% high-fat diet (HFD) and HFD with DHZ for 12 weeks. We analysed levels of renal triglycerides and urinary albumin and albumin-creatinine ratio, renal morphological changes and molecular changes via real-time polymerase chain reaction and immunoblotting. Furthermore, high glucose (HG)- or palmitate (PA)-stimulated mouse mesangial cells or mouse podocytes were treated with DHZ for 24 h. As a result, DHZ markedly reduced renal glycerol accumulation and albuminuria excretion through improvement of thickened glomerular basement membrane, podocyte loss and slit diaphragm reduction. In the renal cortex in the HFD group, phospho-AMPK and nephrin expression reduced, whereas arginase 2 and CD68 expression increased; however, these changes were recovered after DHZ administration. Increased reactive oxygen species (ROS) stimulated by HG or PA in podocytes was inhibited by DHZ treatment. Collectively, these findings indicate that DHZ ameliorates DN via inhibits of lipotoxicity-induced inflammation and ROS formation.

中文翻译:

脱氢姜油酮抑制高脂饮食诱导的肥胖小鼠的肾脂毒性

肾脏中的异位脂肪堆积会导致氧化应激、炎症和细胞死亡。Dehydrozingerone (DHZ) 是一种姜黄素类似物,具有抗肿瘤、抗氧化和抗糖尿病作用。然而,DHZ 在糖尿病肾病 (DN) 中的疗效尚不清楚。在这里,我们验证了 DHZ 对 DN 的功效。我们将实验动物分为三组:常规饮食、60% 高脂饮食 (HFD) 和 DHZ 持续 12 周的 HFD。我们通过实时聚合酶链反应和免疫印迹分析了肾脏甘油三酯和尿白蛋白和白蛋白-肌酐比值、肾脏形态变化和分子变化的水平。此外,用 DHZ 处理高葡萄糖 (HG) 或棕榈酸酯 (PA) 刺激的小鼠系膜细胞或小鼠足细胞 24 小时。因此,DHZ 通过改善肾小球基底膜增厚、足细胞丢失和裂隙隔膜减少,显着减少肾脏甘油积累和蛋白尿排泄。在 HFD 组的肾皮质中,磷酸化 AMPK 和 nephrin 的表达减少,而精氨酸酶 2 和 CD68 的表达增加;然而,这些变化在 DHZ 给药后恢复。DHZ 处理抑制了足细胞中 HG 或 PA 刺激的活性氧 (ROS) 增加。总的来说,这些发现表明 DHZ 通过抑制脂毒性诱导的炎症和 ROS 形成来改善 DN。而精氨酸酶 2 和 CD68 表达增加;然而,这些变化在 DHZ 给药后恢复。DHZ 处理抑制了足细胞中 HG 或 PA 刺激的活性氧 (ROS) 增加。总的来说,这些发现表明 DHZ 通过抑制脂毒性诱导的炎症和 ROS 形成来改善 DN。而精氨酸酶 2 和 CD68 表达增加;然而,这些变化在 DHZ 给药后恢复。DHZ 处理抑制了足细胞中 HG 或 PA 刺激的活性氧 (ROS) 增加。总的来说,这些发现表明 DHZ 通过抑制脂毒性诱导的炎症和 ROS 形成来改善 DN。
更新日期:2021-09-13
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