Maintaining good hearing: Calorie restriction, Sirt3, and glutathione

SIRT3 in Calorie Restriction: Can You Hear Me Now?

Caloric restriction decreases oxidative damage and extends life span in many organisms. Someya et al. (2010) show that the sirtuin SIRT3 mediates the protective effects of caloric restriction on age-related hearing loss by promoting the mitochondrial antioxidant system through the regulation of isocitrate dehydrogenase 2 (Idh2).

Calorie Restriction, Longevity and Cognitive Function

Calorie restriction and SIRT3 trigger global reprogramming of the mitochondrial protein acetylome.

Calorie restriction (CR) extends life span in diverse species. Mitochondria play a key role in CR adaptation; however, the molecular details remain elusive. We developed and applied a quantitative mass spectrometry method to probe the liver mitochondrial acetyl-proteome during CR versus control diet in mice that were wild-type or lacked the protein deacetylase SIRT3. Quantification of 3,285 ace...

Calorie Restriction

Calorie restriction, or caloric restriction (CR), is a dietary regimen thought to improve health and slow the aging process in some animals and fungi by limiting dietary energy intake below the average needs. CR is the only dietary intervention which has been documented to increase both the median and maximum lifespan in a variety of species, among them rodents, yeast, fishes and dogs. The life...

Sirt3 Mediates Reduction of Oxidative Damage and Prevention of Age-Related Hearing Loss under Caloric Restriction

Caloric restriction (CR) extends the life span and health span of a variety of species and slows the progression of age-related hearing loss (AHL), a common age-related disorder associated with oxidative stress. Here, we report that CR reduces oxidative DNA damage in multiple tissues and prevents AHL in wild-type mice but fails to modify these phenotypes in mice lacking the mitochondrial deacet...