Forty percent and eighty percent methionine restriction decrease mitochondrial ROS generation and oxidative stress in rat liver

被引:91
作者
Caro, Pilar [1 ]
Gomez, Jose [1 ]
Lopez-Torres, Monica [1 ]
Sanchez, Ines [1 ]
Naudi, Alba [2 ]
Jove, Mariona [2 ]
Pamplona, Reinald [2 ]
Barja, Gustavo [1 ]
机构
[1] Univ Complutense, Fac Ciencias Biol, Dept Fisiol Anim II, E-28040 Madrid, Spain
[2] Univ Lleida IRBLLEIDA, Dept Expt Med, Lleida 25008, Spain
关键词
mitochondria; caloric restriction; aging; oxygen radicals; longevity; protein damage; fatty acids; respiratory complexes;
D O I
10.1007/s10522-008-9130-1
中图分类号
R592 [老年病学]; C [社会科学总论];
学科分类号
03 ; 0303 ; 100203 ;
摘要
Dietary restriction (DR) lowers mitochondrial reactive oxygen species (ROS) generation and oxidative damage and increases maximum longevity in rodents. Protein restriction (PR) or methionine restriction (MetR), but not lipid or carbohydrate restriction, also cause those kinds of changes. However, previous experiments of MetR were performed only at 80% MetR, and substituting dietary methionine with glutamate in the diet. In order to clarify if MetR can be responsible for the lowered ROS production and oxidative stress induced by standard (40%) DR, Wistar rats were subjected to 40% or 80% MetR without changing other dietary components. It was found that both 40% and 80% MetR decrease mitochondrial ROS generation and percent free radical leak in rat liver mitochondria, similarly to what has been previously observed in 40% PR and 40% DR. The concentration of complexes I and III, apoptosis inducing factor, oxidative damage to mitochondrial DNA, five different markers of protein oxidation, glycoxidation or lipoxidation and fatty acid unsaturation were also lowered. The results show that 40% isocaloric MetR is enough to decrease ROS production and oxidative stress in rat liver. This suggests that the lowered intake of methionine is responsible for the decrease in oxidative stress observed in DR.
引用
收藏
页码:183 / 196
页数:14
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