Cytoprotective effect of hydroxytyrosyl alkyl ether derivatives after oral administration to rats in a model of glucose-oxygen deprivation in brain slices.
This study was designed to determine whether the oral administration of hydroxytyrosol (HT) alkyl ether derivatives has a neuroprotective effect in rats. The animals were treated for 7 days with HT or ethyl, butyl, hexyl, octyl, and dodecyl HT ether. A method of in vitro hypoxia-reoxygenation in brain slices was used. Hexyl, octyl, and dodecyl HT derivatives reduced brain cell death (LDH efflux). Lipid peroxidation and nitrite concentrations were inhibited most by hexyl, octyl, and dodecyl derivatives. Concentrations of 3-nitrotyrosine were reduced by HT butyl, hexyl, octyl, and dodecyl ether derivatives. Interleukin-1β was significantly reduced in brain slices from rats treated with all HT ether derivatives. LDH efflux showed a linear correlation with brain concentrations of lipid peroxides, nitrites plus nitrates, and interleukin 1β. The reduction in oxidative and nitrosative stress and decreased production of pro-inflammatory interleukins may be the basis for the observed neuroprotective effects.
Laboratorio de Investigaciones Antitrombóticas e Isquemia Tisular (LIAIT), 29071 Málaga, Spain.
Javier
J
Muñoz-Marín
José Pedro
JP
De La Cruz
Ana
A
Guerrero
Inmaculada
I
López-Leiva
Juan Antonio
JA
López-Villodres
José Julio
JJ
Reyes
José Luis
JL
Espartero
Andrés
A
Madrona
María Teresa
MT
Labajos
José Antonio
JA
González-Correa
D000818:Animals; D017209:Apoptosis / Q000187:drug effects; D001921:Brain / Q000187:drug effects / Q000378:metabolism*; D019610:Cytoprotection; D004987:Ethers / Q000008:administration & dosage*; D005947:Glucose / Q000378:metabolism*; D006801:Humans; D000860:Hypoxia / Q000188:drug therapy* / Q000378:metabolism*; D008297:Male; D008954:Models, Biological; D018696:Neuroprotective Agents / Q000008:administration & dosage*; D018384:Oxidative Stress / Q000187:drug effects; D010100:Oxygen / Q000378:metabolism*; D051381:Rats; D017208:Rats, Wistar
D004987:Ethers; D018696:Neuroprotective Agents; D005947:Glucose; D010100:Oxygen