title: Plant-derived phenolics inhibit the accrual of structurally characterised protein and lipid oxidative modifications.
abstract: Epidemiological data suggest that plant-derived phenolics beneficial effects include an inhibition of LDL oxidation. After applying a screening method based on 2,4-dinitrophenyl hydrazine-protein carbonyl reaction to 21 different plant-derived phenolic acids, we selected the most antioxidant ones. Their effect was assessed in 5 different oxidation systems, as well as in other model proteins. Mass-spectrometry was then used, evidencing a heterogeneous effect on the accumulation of the structurally characterized protein carbonyl glutamic and aminoadipic semialdehydes as well as for malondialdehyde-lysine in LDL apoprotein. After TOF based lipidomics, we identified the most abundant differential lipids in Cu(++)-incubated LDL as 1-palmitoyllysophosphatidylcholine and 1-stearoyl-sn-glycero-3-phosphocholine. Most of selected phenolic compounds prevented the accumulation of those phospholipids and the cellular impairment induced by oxidized LDL. Finally, to validate these effects in vivo, we evaluated the effect of the intake of a phenolic-enriched extract in plasma protein and lipid modifications in a well-established model of atherosclerosis (diet-induced hypercholesterolemia in hamsters). This showed that a dietary supplement with a phenolic-enriched extract diminished plasma protein oxidative and lipid damage. Globally, these data show structural basis of antioxidant properties of plant-derived phenolic acids in protein oxidation that may be relevant for the health-promoting effects of its dietary intake.
authors.affiliation: Departament of Food Technology, CeRTA-TPV, Escola Tècnica Superior d' Enginyeria Agrària, Universitat de Lleida, Lleida, Spain.
authors.forename: Arantza
authors.initials: A
authors.lastname: Soler-Cantero
authors.forename: Mariona
authors.initials: M
authors.lastname: Jové
authors.forename: Daniel
authors.initials: D
authors.lastname: Cacabelos
authors.forename: Jordi
authors.initials: J
authors.lastname: Boada
authors.forename: Alba
authors.initials: A
authors.lastname: Naudí
authors.forename: Maria-Paz
authors.initials: MP
authors.lastname: Romero
authors.forename: Anna
authors.initials: A
authors.lastname: Cassanyé
authors.forename: José C E
authors.initials: JC
authors.lastname: Serrano
authors.forename: Lluis
authors.initials: L
authors.lastname: Arola
authors.forename: Josep
authors.initials: J
authors.lastname: Valls
authors.forename: Maria Josep
authors.initials: MJ
authors.lastname: Bellmunt
authors.forename: Joan
authors.initials: J
authors.lastname: Prat
authors.forename: Reinald
authors.initials: R
authors.lastname: Pamplona
authors.forename: Manuel
authors.initials: M
authors.lastname: Portero-Otin
authors.forename: Maria-José
authors.initials: MJ
authors.lastname: Motilva
mesh_terms: D000447:Aldehydes / Q000737:chemistry; D000821:Animal Feed; D000818:Animals; D000975:Antioxidants / Q000737:chemistry; D002470:Cell Survival; D003300:Copper / Q000737:chemistry; D006224:Cricetinae; D006801:Humans; D008055:Lipids / Q000737:chemistry*; D008077:Lipoproteins, LDL / Q000737:chemistry; D008239:Lysine / Q000737:chemistry; D008297:Male; D008315:Malondialdehyde / Q000737:chemistry; D013058:Mass Spectrometry / Q000379:methods*; D008647:Mesocricetus; D010100:Oxygen / Q000737:chemistry*; D019800:Phenol / Q000737:chemistry*; D010743:Phospholipids / Q000737:chemistry; D010936:Plant Extracts / Q000494:pharmacology*; D010944:Plants / Q000378:metabolism*
chemical_list: D000447:Aldehydes; D000975:Antioxidants; D008055:Lipids; D008077:Lipoproteins, LDL; D010743:Phospholipids; D010936:Plant Extracts; D019800:Phenol; D008315:Malondialdehyde; D003300:Copper; D008239:Lysine; D010100:Oxygen