目的 探讨达格列净对糖尿病肾病(diabetic nephropathy,DN)大鼠的肾脏保护作用及对 AMP 活化蛋白激酶(AMP-activated protein kinase,AMPK)/哺乳动物雷帕霉素靶蛋白(mammalian target of rapamycin,mTOR)信号通路表达的影响.方法 SPF级Wistar雄性大鼠 40 只,随机分为正常组、模型组、低剂量组和高剂量组,每组各 10 只.成功制备DN模型后,正常组大鼠给予普通饲料+生理盐水灌胃;模型组大鼠给予高糖高脂饲料+生理盐水灌胃;低剂量组大鼠给予高糖高脂饲料+达格列净 1mg/(kg·d)灌胃;高剂量组大鼠给予高糖高脂饲料+达格列净 10mg/(kg·d)灌胃.各组大鼠连续干预 12 周.比较各组大鼠的肾功能指标、肾脏病理组织变化、p-AMPK和p-mTOR蛋白表达、Ⅰ型胶原(collagen type Ⅰ,COL Ⅰ)、Ⅳ型胶原(collagen type Ⅳ,COL Ⅳ)、纤维连接蛋白(fibronectin,FN)水平.结果 模型组、低剂量组和高剂量组大鼠的血尿素氮(blood urea nitrogen,BUN)、血肌酐(serum creatinine,SCr)、24h尿蛋白定量、p-mTOR蛋白表达、COL Ⅰ、COL Ⅳ和FN水平均显著高于正常组,p-AMPK蛋白表达显著低于正常组(P<0.05);低剂量组和高剂量组大鼠的BUN、SCr、24h尿蛋白定量、p-mTOR蛋白表达、COL Ⅰ、COL Ⅳ和FN水平均显著低于模型组,p-AMPK蛋白表达显著高于模型组(P<0.05);高剂量组大鼠的BUN、SCr、24h尿蛋白定量、p-mTOR蛋白表达、COL Ⅰ、COL Ⅳ和FN水平均显著低于低剂量组,p-AMPK蛋白表达显著高于低剂量组(P<0.05).结论 达格列净对DN大鼠具有良好的肾脏保护作用,其机制可能与调节AMPK/mTOR信号通路表达有关.
Objective To investigate the protective effect of dapagliflozin on kidney and the expression of AMP-activated protein kinase(AMPK)/mammalian target of rapamycin(mTOR)signaling pathway in diabetic nephropathy(DN)rats.Methods A total of 40 SPF Wistar male rats were randomly divided into normal group,model group,low-dose group and high-dose group,with 10 rats in each group.After the DN model was successfully prepared,the rats in normal group were given normal diet + normal saline by gavage,the rats in model group was given high sugar and high fat feed + normal saline by gavage,the rats in low-dose group was given high sugar and high fat feed+1mg/(kg·d)of dapagliflozin by gavage,the rats in high-dose group was given high sugar and high fat feed+10mg/(kg·d)of dapagliflozin by gavage.Rats in each group were continuously gavaged for 12 weeks.Renal function indexes,renal pathological changes,p-AMPK and p-mTOR protein expression,collagen type Ⅰ(COL Ⅰ),collagen type Ⅳ(COL Ⅳ)and fibronectin(FN)of all groups were compared.Results Blood urea nitrogen(BUN),serum creatinine(SCr),24h urinary protein quantity,p-mTOR protein expression,COL Ⅰ,COL Ⅳ and FN levels of rats in model group,low-dose group and high-dose group were significantly higher than those in normal group,and p-AMPK protein expression was significantly lower than that of normal group(P<0.05).BUN,SCr,24h urinary protein quantity,p-mTOR protein expression,COL Ⅰ,COL Ⅳ and FN levels of rats in low-dose group and high-dose group were significantly lower than those in model group,while p-AMPK protein expression was significantly higher than that in model group(P<0.05).BUN,SCr,24h urinary protein quantity,p-mTOR protein expression,COL Ⅰ,COL Ⅳ and FN levels in high-dose group were significantly lower than those in low-dose group,and p-AMPK protein expression was significantly higher than that in low-dose group(P<0.05).Conclusion Dapagliflozin has a good kidney protection effect on DN rats,and its mechanism may be related to the regulation of AMPK/mTOR signaling pathway.
叶玉燕;王鹏;方霞;杨静
金华市人民医院肾内科,浙江金华 321000金华市人民医院药学部,浙江金华 3210001
临床医学
达格列净;糖尿病肾病;肾脏保护;AMPK/mTOR信号通路
Dapagliflozin;Diabetic nephropathy;Kidney protection;AMPK/mTOR signaling pathway
《中国现代医生》 2024 (010)
60-63,71 / 5
浙江省公益类金华市科学技术研究计划项目(2021-4-067)
10.3969/j.issn.1673-9701.2024.10.015
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