Abstract Title:

The protective role of liquiritin in high fructose-induced myocardial fibrosis via inhibiting NF-κB and MAPK signaling pathway.

Abstract Source:

Biomed Pharmacother. 2016 Dec ;84:1337-1349. Epub 2016 Nov 1. PMID: 27810791

Abstract Author(s):

Yuan Zhang, Lei Zhang, Yi Zhang, Jin-Jin Xu, Li-Li Sun, Shuang-Zhan Li

Article Affiliation:

Yuan Zhang


Diabetic cardiomyopathy has been known as an important complication of diabetes and characterized by persistent diastolic dysfunction, resulting in myocardial fibrosis, which is associated inflammatory response and oxidative stress. Liquiritin is a major constituent of Glycyrrhiza Radix, possessing various pharmacological activities and exhibiting various positive biological effects, including anti-cancer, anti-oxidative and neuroprotective effects. Here, we investigated the anti-inflammatory properties and protective effects of lquiritin in high fructose-induced mice and cardiomyocytes to clarify the potential mechanism. The mice were divided into the control mice, 30% high fructose-induced mice, 10mg/kg liquiritin-treaed mice after fructose feeding and 20mg/kg liquiritin-treaed mice after fructose feeding. Liquiritin effectively reduced the lipid accumulation and insulin resistance induced by fructose feeding. In comparison to high fructose-feeding control mice, liquiritin-treated mice developed less myocardial fibrosis with lower expression of Collagen type I, Collagen type II and alpha smooth muscle-actin (α-SMA). In addition, liquiritin significantly reduced the inflammatory cytokine release and NF-κB phosphorylation through IKKα/IκBα signaling pathway suppression. Further, Mitogen-activated protein kinases (MAPKs), including p38, ERK1/2 and JNK, was up-regulated for fructose stimulation, whichwas inactivated by liquiritin treatment in vivo and in vitro studies. Our data indicates that liquiritin has a protective effect against high fructose-induced myocardial fibrosis via suppression of NF-κB and MAPKs signaling pathways, and liquiritin may be a promising candidate for diabetes-relatedmyocardial fibrosis treatment.

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