6533b7cffe1ef96bd1258662

RESEARCH PRODUCT

Prevention of 7-ketocholesterol-induced side effects by natural compounds

Wiem MeddebWiem MeddebAmira ZarroukGérard LizardLila Boulekbache-makhloufRanda SghaierRanda SghaierBoubker NasserThomas NuryFatiha BrahmiAnne VejuxIham BadreddineDominique Vervandier-fasseurLeila RezigAline YammineAline YammineAmira NamsiKhouloud SassiKhouloud SassiKhodir Madani

subject

Programmed cell deathOxysterol030309 nutrition & dieteticsTocopherolsInflammationPharmacologymedicine.disease_causeAntioxidantsIndustrial and Manufacturing Engineering03 medical and health scienceschemistry.chemical_compound0404 agricultural biotechnologymedicineHumansNoncommunicable DiseasesKetocholesterolsInflammation0303 health sciencesCholesterolFatty AcidsPolyphenols04 agricultural and veterinary sciencesGeneral Medicine040401 food scienceCytoprotectionOxidative StressMetabolic pathwaychemistryHepatic stellate cellmedicine.symptomOxidation-ReductionOxidative stressFood Science

description

Cholesterol oxidation products, also named oxysterols, can be formed either by cholesterol auto-oxidation, enzymatically or both. Among these oxysterols, 7-ketocholesterol (7KC) is mainly formed during radical attacks that take place on the carbon 7 of cholesterol. As increased levels of 7KC have been found in the tissues, plasma and/or cerebrospinal fluid of patients with major diseases, especially age-related diseases (cardiovascular diseases, eye diseases, neurodegenerative diseases), some cancers, and chronic inflammatory diseases, it is suspected that 7KC, could contribute to their development. Since 7KC, provided by the diet or endogenously formed, is not or little efficiently metabolized, except in hepatic cells, its cellular accumulation can trigger numerous side effects including oxidative stress, inflammation and cell death. To counteract 7KC-induced side effects, it is necessary to characterize the metabolic pathways activated by this oxysterol to identify potential targets for cytoprotection and geroprotection. Currently, several natural compounds (tocopherols, fatty acids, polyphenols, etc) or mixtures of compounds (oils) used in traditional medicine are able to inhibit the deleterious effects of 7KC. The different molecules identified could be valued in different ways (functional foods, recombinant molecules, theranostic) to prevent or treat diseases associated with 7KC.

https://doi.org/10.1080/10408398.2018.1491828