Mitochondrial dysfunction in cardiac aging
نویسندگان
چکیده
منابع مشابه
Cardiac reperfusion injury: aging, lipid peroxidation, and mitochondrial dysfunction.
Cardiac reperfusion and aging are associated with increased rates of mitochondrial free radical production. Mitochondria are therefore a likely site of reperfusion-induced oxidative damage, the severity of which may increase with age. 4-Hydroxy-2-nonenal (HNE), a major product of lipid peroxidation, increases in concentration upon reperfusion of ischemic cardiac tissue, can react with and inact...
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(mtDNA) disease and the frequency of cardiac involvement, at least 1 in 10–15,000 of the general population will be affected.4 In 1991, the first mtDNA point mutation in the MT-TL1 gene associated with an MCM was described.5 Since then, several mutations, mostly in mitochondrial tRNA genes, have been associated with different MCM phenotypes. At the end of the 20th century, mutations in several ...
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Hippocampus mitochondrial dysfunction with impaired electron transfer and increased oxidative damage was observed upon rat aging. Hippocampal mitochondria of aged (12 mo) and senescent (20 mo) rats showed, compared with young (4 mo) rats, marked decreases in the rate of state 3 respiration with NAD-dependent substrates (32-51%) and in the activities of mitochondrial complexes I (57-73%) and IV ...
متن کاملMitochondrial DNA, mitochondrial dysfunction, and cardiac manifestations.
Mitochondria, are the powerhouses of cells, have their own DNA (mtDNA), regulate the transport of metabolites and ions, and impact cell physiology, survival, and death. Mitochondrial dysfunction, including impaired oxidative phosphorylation, preferentially affects heart function due to an imbalance of energy supply and demand. Recently, mitochondrial mutations and associated mitochondrial dysfu...
متن کاملOxidative Stress, Mitochondrial Dysfunction, and Aging
Aging is an intricate phenomenon characterized by progressive decline in physiological functions and increase in mortality that is often accompanied by many pathological diseases. Although aging is almost universally conserved among all organisms, the underlying molecular mechanisms of aging remain largely elusive. Many theories of aging have been proposed, including the free-radical and mitoch...
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ژورنال
عنوان ژورنال: Biochimica et Biophysica Acta (BBA) - Bioenergetics
سال: 2015
ISSN: 0005-2728
DOI: 10.1016/j.bbabio.2015.07.009