In vitro evaluation of antiatherogenic potential of Origanum × paniculatum, Lippia alba, Clinopodium nepeta, and Eucalyptus globulus essential oils

CASTRO, MARÍA AGUSTINA; GIROTTI, JUAN ROBERTO; DUMRAUF, BÁRBARA; RODENAK-KLADNIEW, BORIS; ZARO, MARÍA JOSÉ; OTERO, CAMILA MARIEL; MONTERO-VILLEGAS, SANDRA; DE BRAVO, MARGARITA GARCÍA; VIÑA, SONIA ZULMA; CRESPO, ROSANA

Journal of Herbal Medicine

Urban und Fischer Verlag Jena

Año: 2023

2210-8033

Introduction: Essential oils (EOs) are mixtures of secondary plant metabolism compounds withpotential lipid-lowering activity and antioxidant properties. They may therefore be consideredas add-on therapy for the prevention and treatment of cardiovascular diseases.Methods: EOs of Origanum × paniculatum (OpEO), Lippia alba (chemotype linalool) (LaLEO),Clinopodium nepeta (CnEO) and Eucalyptus globulus (EgEO), were evaluated on THP-1 foamcell macrophages as a cellular model of atherogenesis. Cell viability was determined by theMTT assay, lipid content by thin-layer chromatography, and Oil Red O staining. Antioxidantactivity was evaluated by TBARS on low-density lipoprotein lipid peroxidation, and byABTS•+, DPPH•, and FRAP assays. EOs were characterized by gas chromatography–massspectrometry and a predictive multivariate data analysis was performed by partial least squareregression (PLS) to identify the components related to antiatherogenic potential.Results: OpEO reduced foam cell viability (IC50= 45 µL/L) and cholesterol and triacylglycerolcontent and demonstrated antioxidant activity. In contrast, LaLEO increased lipid content andshowed a prooxidant capacity with low reduction of cell viability (IC50=340 µL/L). CnEOshowed prooxidant activity and reduction of cell viability (IC50=130 µL/L) without changes inlipid content. EgEO showed antioxidant activity, lipid increase, and low cytotoxicity(IC50=770 µL/L). PLS analysis suggests that cis-sabinene hydrate is responsible for cellviability inhibition, thymol and β-cis-terpineol decrease lipid content and possess antioxidantactivity, and linalool increases lipid levels and has prooxidant capacity.Conclusions: OpEO is a promising natural product for therapy against atherosclerosis, with cissabinene hydrate, thymol, and β-cis-terpineol as potential active principles