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Journal of Nutritional Biochemistry 2020-Sep

Erica multiflora extract rich in Quercetin-3-O-glucoside and Kaempferol-3-O-glucoside alleviates high fat and fructose diet -induced fatty liver disease by modulating metabolic and inflammatory pathways in Wistar rats

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Rihab Khlifi
Zaineb Dhaouefi
Imène Ben Toumia
Aida Lahmar
Fairouz Sioud
Rim Bouhajeb
Ahlem Bellalah
Leila Chekir-Ghedira

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概要

The wide morbidity of obesity has heightened interest in providing natural and safe compounds to maintain optimal health. The present study was designed to determine the chemical constituents and the effects of methanol leaf extract from Erica multiflora (M-EML) on mitigating high-fat and high-fructose diet (HFFD)-induced metabolic syndrome (MS). LC-MS/MS characterization of M-EML allowed the identification of 14 secondary metabolites and showed that quercetin-3-O-glucoside and kaempferol-3-O-glucoside were the main compounds of our extract. In the in vivo study, the oral administration of M-EML (250 mg/kg) during the last 4 weeks of the experimentation alleviated HFFD-induced obesity, insulin resistance (IR) and cardiovascular diseases. Thus, M-EML treatment significantly normalized body and liver weight, allowed to a sharp decline in plasma levels of TC, TG and LDL-c by 32%, 35% and 66%, respectively. Moreover, hepatic enzymes, total and direct bilirubin, lipase and uric acid levels have been diminished in treated group. Histopathology of the liver confirmed the changes induced by HFFD and the heptoprotective effect of M-EML. The supply of M-EML reduced NO production and cellular lysosomal enzyme activity by 44% and 60%, respectively compared to HFFD. Besides, M-EML showed decreased pro-inflammatory cytokines levels (259.5±47.35 pg/mL and 56.08±1.56 pg/mL) of TNF-α and IL-6, respectively. In addition, M-EML reduced liver malondialdehyde (MDA) content and enhanced superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx) activities. In contrast, these enzymatic activities have been disrupted in HFFD rats. Overall, M-EML prevented obesity through the modulation of metabolic syndrome, reducing inflammation and promoting antioxidant enzymes activities.

Keywords: Erica Multiflora; High-Fat-Fructose Diet; Inflammation; LC–MS/MS; Metabolic Syndrome; Oxidative Stress.

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