Antidiabetic drug metformin alleviates endotoxin-induced fulminant liver injury in mice

International Immunopharmacology
Hongmei YuanLi Zhang

Abstract

Metformin is a first-line antidiabetic drug in type 2 diabetes for its hypoglycemic activity, but recently researches also revealed the anti-inflammatory properties of metformin. In the present study, the pharmacological efficiency of metformin in lipopolysaccharide (LPS)-induced hepatic injury in D-galactosamine (D-Gal)-sensitized mice was investigated. We found that pretreatment with metformin significantly decreased serum ALT and AST levels in LPS/D-Gal-exposed mice. These were accomplished with improved histological alterations in liver sections, decreased myeloperoxidase (MPO) activity, reduced malondialdehyde (MDA) content in liver homogenates and increased survival rate of experimental animals. Metformin also markedly reduced hepatic TNF-α mRNA content and blood TNF-α level. Additional experiment showed that metformin significantly attenuated LPS/D-Gal-induced hepatic apoptosis as evidenced by decreased caspase activities in liver tissues and reduced number of TUNEL-positive cells in liver sections. Furthermore, therapeutic administration of metformin after LPS/D-Gal challenge also improved the survival rate of experimental animal. These results indicated that the hypoglycemic reagent metformin could also provide therape...Continue Reading

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