Puerarin Mitigates Diabetic Hepatic Steatosis and Fibrosis by Inhibiting TGF-β Signaling Pathway Activation in Type 2 Diabetic Rats

Author:

Hou Biyu12,Zhao Yuerong23,Qiang Guifen2ORCID,Yang Xiuying2,Xu Chunyang24,Chen Xi2,Liu Chenge2,Wang Xiaobo23,Zhang Li12ORCID,Du Guanhua12ORCID

Affiliation:

1. State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences, and Peking Union Medical College, Beijing 100050, China

2. Beijing Key Laboratory of Drug Target Identification and Drug Screening, Institute of Materia Medica, Chinese Academy of Medical Sciences, & Peking Union Medical College, Beijing 100050, China

3. School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, China

4. College of Pharmacy, Harbin University of Commerce, Harbin 510006, China

Abstract

Lipid metabolism disorder and inflammation are essential promoters in pathogenesis of liver injury in type 2 diabetes. Puerarin (PUR) has been reported to exert beneficial effects on many diabetic cardiovascular diseases and chemical-induced liver injuries, but its effects on diabetic liver injury and its mechanism are still unclear. The current study was designed to explore the therapeutic effect and mechanism of PUR on liver injury in a type 2 diabetic rat model induced by a high-fat diet combined with low-dose streptozotocin. The diabetic rats were treated with or without PUR (100 mg/kg/day) by gavaging for 8 weeks, and biochemical and histological changes in liver were examined. Results showed that treatment with PUR significantly attenuated hepatic steatosis by regulating blood glucose and ameliorating lipid metabolism disorder. Liver fibrosis was relieved by PUR treatment. PUR inhibited oxidative stress and inflammation which was associated with inactivation of NF-κB signaling, thereby blocking the upregulation of proinflammatory cytokines (IL-1β, TNF-α) and chemokine (MCP-1). This protection of PUR on diabetic liver injury is possibly related with inhibition on TGF-β/Smad signaling. In conclusion, the present study provides evidence that PUR attenuated type 2 diabetic liver injury by inhibiting NF-κB-driven liver inflammation and the TGF-β/Smad signaling pathway.

Funder

National Natural Science Foundation of China

Publisher

Hindawi Limited

Subject

Cell Biology,Aging,General Medicine,Biochemistry

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