Protective effect of a kinase anchor protein 12 on podocyte mitochondrial autophagy in diabetic kidney disease
10.3969/j.issn.1006-6187.2024.10.010
- VernacularTitle:激酶锚定蛋白12/蛋白原转化酶枯草杆菌蛋白酶/kexin型6信号通路对糖尿病肾脏疾病小鼠足细胞线粒体自噬保护作用的研究
- Author:
Qingzhou LAI
1
;
Xiaoqin WU
;
Yuping GONG
Author Information
1. 337000 萍乡市人民医院内分泌科
- Keywords:
A kinase anchor protein 12;
Mitochondrial autophagy;
Proprotein convertase subtilisin/kexin type 6;
Diabetic kidney disease;
Podocyte
- From:
Chinese Journal of Diabetes
2024;32(10):770-777
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the protective effect of AKAP12/PCK6 signaling pathway on podocyte autophagy in diabetic kidney disease(DKD).Methods A total of 40 C57/B6 AKAP12 KO(AKAP12-/-)mice and wild-type(WT)littermates were randomly divided into four groups,with 10 mice in each group:Ctrl+WT group,Ctrl+AKAP12-/-group,DKD+WT group and DKD+AKAP12-/-group.Primary podocytes were obtained from AKAP12-/-mice and WT mice,and exposed to high glucose(HG,30 mmol/L)or mannitol for 24 h to investigate the mitosis and autophagy of podocytes.The primary podocytes were divided into Mannitol+WT,G+WT,Mannitol+AKAP12-/-and HG+AKAP12-/-.In addition,AKAP12-/-podocytes were transfected with sh-PCSK6 to knockdown the expression of PCK6.Mito-Tracker staining was used to analyze the morphology of mitochondria in podocytes.The expressions of mitotic proteins(FIS1 and DRP1),mitochondrial autophagy(PINK1 and Parkin)and autophagy-related proteins(LC3 and p62)were analyzed by Western blot.Results Compared with HG+WT group,the number of single mitochondria and the expression of FIS1,DRP1,PINK1,Parkin,LC3Ⅱ and p62 proteins increased,while the average branch length of mitochondria decreased in HG+AKAP12-/-group(P＜0.05).Compared with HG+sh-NC group,the number of single mitochondria and the expression of FIS1,DRP1,PINK1,Parkin and LC3Ⅱ proteins decreased significantly in HG+sh-PCSK6 group(P＜0.05 or P＜0.01),while the average branch length of mitochondria increased significantly(P＜0.05).Conclusions AKAP12/PCSK6 signaling pathway mediates the regulation of mitochondrion division and mitochondrion autophagy in podocytes under HG environment.
