title: Methionine restriction and life-span control.
abstract: Dietary restriction (DR) without malnutrition is associated with longevity in various organisms. However, it has also been shown that reduced calorie intake is often ineffective in extending life span. Selecting optimal dietary regimens for DR studies is complicated, as the same regimen may lead to different outcomes depending on genotype and environmental factors. Recent studies suggested that interventions such as moderate protein restriction with or without adequate nutrition (e.g., particular amino acids or carbohydrates) may have additional beneficial effects mediated by certain metabolic and hormonal factors implicated in the biology of aging, regardless of total calorie intake. In particular, it was shown that restriction of a single amino acid, methionine, can mimic the effects of DR and extend life span in various model organisms. We discuss the beneficial effects of a methionine-restricted diet, the molecular pathways involved, and the use of this regimen in longevity interventions.
authors.affiliation: College of Life Sciences and Biotechnology, Korea University, Seoul, South Korea.
authors.forename: Byung Cheon
authors.initials: BC
authors.lastname: Lee
authors.affiliation: Division of Genetics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts.
authors.forename: Alaattin
authors.initials: A
authors.lastname: Kaya
authors.affiliation: Division of Genetics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts.
authors.forename: Vadim N
authors.initials: VN
authors.lastname: Gladyshev
mesh_terms: D000375:Aging; D000818:Animals; D031204:Caloric Restriction; D004032:Diet; D018753:Diet, Protein-Restricted; D006262:Health; D006801:Humans; D008136:Longevity; D008715:Methionine / Q000378:metabolism*; D015398:Signal Transduction; D058570:TOR Serine-Threonine Kinases / Q000378:metabolism
chemical_list: D008715:Methionine; D058570:TOR Serine-Threonine Kinases
keywords: dietary restriction; life-span extension; methionine restriction; protein restriction