首页|CDK9 inhibition improves diabetic nephropathy by reducing inflammation in the kidneys

CDK9 inhibition improves diabetic nephropathy by reducing inflammation in the kidneys

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  • NSTL
  • Elsevier
Diabetic nephropathy (DN) is a chronic inflammatory renal disease induced by hyperglycemia. Recent studies have implicated cyclin-dependent kinase 9 (CDK9) in inflammatory responses and renal fibrosis. In this study, we explored a potential role of CDK9 in DN by using cultured mouse mesangial cell line SV40 MES-13 and streptozotocin-induced type 1 mouse model of diabetes. We inhibited CDK9 in mice and in cultured cells by a highly selective CDK9 inhibitor, LDC000067 (LDC), and evaluated inflammatory and fibrogenic outcome by mRNA and protein analyses. Our studies show that treatment of diabetic mice with LDC significantly inhibits the levels of inflammatory cytokines and fibrogenic genes in kidney specimens. These reductions were associated with improved renal function. We also found that LDC treatment suppressed MAPK-AP1 activation. We then confirmed the involvement of CDK9 in cultured SV40 MES-13 cells and showed that deficiency in CDK9 prevents glucose-induced inflammatory and fibrogenic proteins. This protection was also afforded by suppression of MAPK-AP1. Taken together, our results how that hyperglycemia activates CDK9-MAPK-AP1 axis in kidneys to induce inflammation and fibrosis, leading to renal dysfunction. Our findings also suggest that CDK9 may serve as a potential therapeutic target for DN.

Cyclin-dependent kinase 9Diabetic nephropathyInflammationRenal fibrosisHigh glucose

Yang, Xiaojing、Luo, Wu、Li, Li、Hu, Xiang、Xu, Mingjiang、Wang, Yi、Feng, Jianpeng、Qian, Jianchang、Guan, Xinfu、Zhao, Yunjie、Liang, Guang

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Wenzhou Med Univ, Sch Pharmaceut Sci, Chem Biol Res Ctr, Wenzhou 325035, Zhejiang, Peoples R China

Zhejiang Univ, Affiliated Hosp 4, Dept Anesthesiol, Sch Med, Yiwu, Zhejiang, Peoples R China

Wenzhou Med Univ, Dept Endocrinol, Affiliated Hosp 1, Wenzhou, Zhejiang, Peoples R China

Wenzhou Med Univ, Affiliated Cangnan Hosp, Wenzhou, Zhejiang, Peoples R China

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2021

10.1016/j.taap.2021.115465

Toxicology and Applied Pharmacology

Toxicology and Applied Pharmacology

SCI
ISSN：0041-008X
年,卷(期)：2021.416
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