title: Gender and age-dependent differences in the mitochondrial apoptogenic pathway in Alzheimer's disease.
abstract: Age-related mitochondrial oxidative stress is highly gender dependent. The aim of this study was to determine the role of gender in the mitochondrial contribution to neuronal apoptosis in Alzheimer's disease (AD). We used mitochondria isolated from brains of Wistar rats to study the toxicity of ss-amyloid peptide (Ass), and found that it increases mitochondrial peroxide production, nitration and oxidation of proteins, and release of cytochrome c. The toxic effects occurred in young males and in old females but not in young females, indicating their resistance to Ass. This resistance was abolished with age. These toxic effects of Ass were prevented by heme. Our findings provide a molecular mechanism for the contribution of Abeta to the mitochondrial dysfunction and oxidative stress seen in AD, as well as for the mitochondria-dependent pathway of apoptosis in AD. Gender and age-related differences seen in the development of AD can also be partially explained.
authors.affiliation: Departamento de Fisiología, Facultad de Medicina, Avda. Blasco Ibáñez 15, 46010 Valencia, Spain.
authors.forename: Ana
authors.initials: A
authors.lastname: Lloret
authors.forename: Mari-Carmen
authors.initials: MC
authors.lastname: Badía
authors.forename: Nancy J
authors.initials: NJ
authors.lastname: Mora
authors.forename: Angel
authors.initials: A
authors.lastname: Ortega
authors.forename: Federico V
authors.initials: FV
authors.lastname: Pallardó
authors.forename: Maria-Dolores
authors.initials: MD
authors.lastname: Alonso
authors.forename: Hani
authors.initials: H
authors.lastname: Atamna
authors.forename: Jose
authors.initials: J
authors.lastname: Viña
mesh_terms: D000375:Aging / Q000502:physiology*; D000544:Alzheimer Disease / Q000378:metabolism* / Q000473:pathology; D016229:Amyloid beta-Peptides / Q000502:physiology*; D000818:Animals; D017209:Apoptosis; D045304:Cytochromes c / Q000378:metabolism; D005260:Female; D008297:Male; D008928:Mitochondria / Q000502:physiology*; D009474:Neurons / Q000502:physiology; D018384:Oxidative Stress; D051381:Rats; D017208:Rats, Wistar; D012737:Sex Factors; D015398:Signal Transduction
chemical_list: D016229:Amyloid beta-Peptides; D045304:Cytochromes c