Abstract
This study was undertaken to evaluate the antioxidative and lipid accumulation inhibitory effects in HepG2 cell of 11 Tunisian plants extracts. Total phenolics contents (TPC), and total flavonoid contents (TFC) of 11 plants extracts were measured, and antioxidative activities was analyzed using DPPH, ABTS, FRAP, ORAC and TBA assay. Inhibitory effect of oxidative stress was evaluated by cell viability and lipid peroxidation level in H2O2-treated HepG2 cells. Lipid accumulation inhibitory effect was determined by Oil-Red-O staining and intracellular triglyceride assay in HepG2 cell. M. communis L. (156.73 mgGAE/g) and N. glauca Graham (108.81 mgNAE/g) were the highest TPC and TFC, respectively, among 11 plants. M. communis L. were the highest antioxidant activity in DPPH and ABTS. FRAP and ORAC results revealed that antioxidant activity in 10 species were higher than the positive control. Among the 11 species, 5 species with the lowest malondialdehyde level were selected and HPLC analysis revealed that plants contain caffeic acid, quercetin, and rutin. 5 plants treatment inhibited lipid peroxidation level and protected HepG2 cells from oxidative stress. Moreover 5 plants significantly inhibited the lipid accumulation and triglyceride content. These results imply scientific evidence for the development of functional foods using 11 plants from Tunisia which has oxidative stress and lipid accumulation reduction effects.
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