Come già ripetuto a sfinimento [
], gli omega-3 NON mi convincono. Meglio, molto meglio, olio di cocco e di oliva.
Mitochondrion. 2010 Aug 5. [Epub ahead of print]
Dietary fatty acids and oxidative stress in the heart mitochondria.
Lemieux H, Bulteau AL, Friguet B, Tardif JC, Blier PU.
Laboratoire de Biologie Intégrative, Université du Québec, Rimouski
(Québec), Canada.
Our study compared the effects of different oils on oxidative stress
in rat heart mitochondria, as well as on plasma parameters used as
risk factors for cardiovascular disease. The rats were fed for 16weeks
with coconut, olive, or fish oil diet (saturated, monounsaturated, or
polyunsaturated fatty acids, respectively). The cardiac mitochondria
from rats fed with coconut oil showed the lowest concentration of
oxidized proteins and peroxidized lipids. The fish oil diet leads to
the highest oxidative stress in cardiac mitochondria, an effect that
could be partly prevented by the antioxidant probucol. Total and LDL
cholesterols decreased in plasma of rats fed fish oil, compared to
olive and coconut oils fed rats. A diet enriched in saturated fatty
acids offers strong advantages for the protection against oxidative
stress in heart mitochondria.
PMID: 20691812 [PubMed - as supplied by publisher]
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J Gerontol A Biol Sci Med Sci. 2010 Aug 26. [Epub ahead of print]
Decrease in Mitochondrial Function in Rat Cardiac Permeabilized Fibers Correlates With the Aging Phenotype.
Lemieux H, Vazquez EJ, Fujioka H, Hoppel CL.
Center for Mitochondrial Disease, Department of Pharmacology, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106. charles.hoppel@case.edu.
Abstract
We measured the loss of cardiac mitochondrial function related to aging in males of three rat strains presenting with different longevity and aging phenotypes: the Fischer 344 (F344), the Brown Norway (BN), and the hybrid F344xBN. The F344 rat has a short life span and a approximately 45% decrease in coupled mitochondrial oxidation in the cardiac permeabilized fibers from the old rats compared with the young rats. Citrate synthase activity in the permeabilized fibers (mitochondrial content) did not change significantly with aging. The BN live longer compared with the F344 and have a 15%-18% loss of mitochondrial respiration in the aged rats compared with the young rats. The differences are not significant. In hybrids, more resistant to aging than are the BN and the F344, mitochondrial function is preserved during aging. The difference in longevity of the different strains is correlated with mitochondrial dysfunction in the heart, suggesting the importance of mitochondria in cardiac aging.
PMID: 20801909 [PubMed - as supplied by publisher]