title: Temperature affects longevity and age-related locomotor and cognitive decay in the short-lived fish Nothobranchius furzeri.
abstract: Temperature variations are known to modulate aging and life-history traits in poikilotherms as different as worms, flies and fish. In invertebrates, temperature affects lifespan by modulating the slope of age-dependent acceleration in death rate, which is thought to reflect the rate of age-related damage accumulation. Here, we studied the effects of temperature on aging kinetics, aging-related behavioural deficits, and age-associated histological markers of senescence in the short-lived fish Nothobranchius furzeri. This species shows a maximum captive lifespan of only 3 months, which is tied with acceleration in growth and expression of aging biomarkers. These biological peculiarities make it a very convenient animal model for testing the effects of experimental manipulations on life-history traits in vertebrates. Here, we show that (i) lowering temperature from 25 degrees C to 22 degrees C increases both median and maximum lifespan; (ii) life extension is due to reduction in the slope of the age-dependent acceleration in death rate; (iii) lowering temperature from 25 degrees C to 22 degrees C retards the onset of age-related locomotor and learning deficits; and (iv) lowering temperature from 25 degrees C to 22 degrees C reduces the accumulation of the age-related marker lipofuscin. We conclude that lowering water temperature is a simple experimental manipulation which retards the rate of age-related damage accumulation in this short-lived species.
authors.affiliation: Scuola Normale Superiore, Pisa, Italy.
authors.forename: Dario R
authors.initials: DR
authors.lastname: Valenzano
authors.forename: Eva
authors.initials: E
authors.lastname: Terzibasi
authors.forename: Antonino
authors.initials: A
authors.lastname: Cattaneo
authors.forename: Luciano
authors.initials: L
authors.lastname: Domenici
authors.forename: Alessandro
authors.initials: A
authors.lastname: Cellerino
mesh_terms: D000375:Aging / Q000502:physiology*; D000818:Animals; D003071:Cognition / Q000502:physiology*; D003532:Cyprinodontiformes / Q000502:physiology*; D008099:Liver / Q000166:cytology; D008136:Longevity / Q000502:physiology*; D009043:Motor Activity / Q000502:physiology*; D013696:Temperature; D013997:Time Factors