Triptolide prevents extracellular matrix accumulation in experimental diabetic kidney disease by targeting microRNA-137/Notch1 pathway

2017 ◽  
Vol 233 (3) ◽  
pp. 2225-2237 ◽  
Author(s):  
Fei Han ◽  
Shanshan Wang ◽  
Yunpeng Chang ◽  
Chunjun Li ◽  
Juhong Yang ◽  
...  
2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Jiarui Han ◽  
Xinxin Pang ◽  
Xiujie Shi ◽  
Yage Zhang ◽  
Zining Peng ◽  
...  

The study is aimed at investigating the effects of Ginkgo biloba extract EGB761 on renal tubular damage and endoplasmic reticulum stress (ERS) in diabetic kidney disease (DKD). A total of 50 C57BL/6 N mice were randomly divided into the normal group, DKD group, DKD+EGB761 group (36 mg/kg), and DKD+4-phenylbutyrate (4-PBA) group (1 g/kg). The DKD model was replicated by high-fat diet combined with intraperitoneal injection of streptozotocin (STZ). Renal tubular epithelial cells (HK-2) were divided into the control group, high-glucose group (30 mmol/L), EGB761 group (40 mg/L, 20 mg/L, 10 mg/L), TM group, and TM+4-PBA group. After 8 weeks of administration, expressions of serum creatinine (Scr), blood urea nitrogen (BUN), 24 h urinary protein (24 h Pro), fasting blood glucose (FBG), β2-microglobulin (β2-MG), and retinol binding protein 4 (RBP4) of mice were tested. The pathological changes of renal tissue were observed. The expressions of extracellular matrix (ECM) accumulation and epithelial-mesenchymal transition (EMT) markers α-smooth muscle actin (α-SMA), E-cadherin, fibronectin, and collagen IV, as well as the ERS markers GRP78 and ATF6, were tested by Western blot, qPCR, immunohistochemistry, or immunofluorescence. EGB761 could decrease the Scr, BUN, 24 h Pro, and FBG levels in the DKD group, alleviate renal pathological injury, decrease urine β2-MG, RBP4 levels, and decrease the expression of α-SMA, collagen IV, fibronectin, and GRP78, as well as ATF6, while increase the expression of E-cadherin. These findings demonstrate that EGB761 can improve renal function, reduce tubular injury, and ameliorate ECM accumulation and EMT in DKD kidney tubules, and the mechanism may be related to the inhibition of ERS.


2020 ◽  
Vol 295 (21) ◽  
pp. 7249-7260 ◽  
Author(s):  
Satoshi Miyamoto ◽  
Guanshi Zhang ◽  
David Hall ◽  
Peter J. Oates ◽  
Soumya Maity ◽  
...  

Exposure to chronic hyperglycemia because of diabetes mellitus can lead to development and progression of diabetic kidney disease (DKD). We recently reported that reduced superoxide production is associated with mitochondrial dysfunction in the kidneys of mouse models of type 1 DKD. We also demonstrated that humans with DKD have significantly reduced levels of mitochondrion-derived metabolites in their urine. Here we examined renal superoxide production in a type 2 diabetes animal model, the db/db mouse, and the role of a mitochondrial protectant, MTP-131 (also called elamipretide, SS-31, or Bendavia) in restoring renal superoxide production and ameliorating DKD. We found that 18-week-old db/db mice have reduced renal and cardiac superoxide levels, as measured by dihydroethidium oxidation, and increased levels of albuminuria, mesangial matrix accumulation, and urinary H2O2. Administration of MTP-131 significantly inhibited increases in albuminuria, urinary H2O2, and mesangial matrix accumulation in db/db mice and fully preserved levels of renal superoxide production in these mice. MTP-131 also reduced total renal lysocardiolipin and major lysocardiolipin subspecies and preserved lysocardiolipin acyltransferase 1 expression in db/db mice. These results indicate that, in type 2 diabetes, DKD is associated with reduced renal and cardiac superoxide levels and that MTP-131 protects against DKD and preserves physiological superoxide levels, possibly by regulating cardiolipin remodeling.


Diabetes ◽  
2018 ◽  
Vol 67 (Supplement 1) ◽  
pp. 1126-P
Author(s):  
HIDDO LAMBERS. HEERSPINK ◽  
PAUL PERCO ◽  
JOHANNES LEIERER ◽  
MICHAEL K. HANSEN ◽  
ANDREAS HEINZEL ◽  
...  

Diabetes ◽  
2018 ◽  
Vol 67 (Supplement 1) ◽  
pp. 526-P
Author(s):  
MARIANA E. GUADALUPE ◽  
GRACIELA B. ALVAREZ CONDO ◽  
FANNY E. VERA LORENTI ◽  
BETTY J. PAZMIÑO GOMEZ ◽  
EDGAR I. RODAS NEIRA ◽  
...  

Diabetes ◽  
2018 ◽  
Vol 67 (Supplement 1) ◽  
pp. 443-P
Author(s):  
YOSHINORI KAKUTANI ◽  
MASANORI EMOTO ◽  
YUKO YAMAZAKI ◽  
KOKA MOTOYAMA ◽  
TOMOAKI MORIOKA ◽  
...  

Diabetes ◽  
2019 ◽  
Vol 68 (Supplement 1) ◽  
pp. 539-P
Author(s):  
YOSHINORI KAKUTANI ◽  
MASANORI EMOTO ◽  
KATSUHITO MORI ◽  
YUKO YAMAZAKI ◽  
AKINOBU OCHI ◽  
...  

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