NDLI: Hormetic effects of repeated exposures to cold at young age on longevity, aging and resistance to heat or cold shocks in Drosophila melanogaster

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Hormetic effects of repeated exposures to cold at young age on longevity, aging and resistance to heat or cold shocks in Drosophila melanogaster

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Hormetic effects of repeated exposures to cold at young age on longevity, aging and resistance to heat or cold shocks in Drosophila melanogaster

Content Provider	Springer Nature Link
Author	Le Bourg, Éric
Copyright Year	2007
Abstract	Exposing young flies to hypergravity has hormetic effects on aging, longevity and resistance to heat stress. The present experiments tested whether cold shocks at young age could also have hormetic effects. Flies were cold-shocked at 0°C daily for 60 min during two periods of 5 days separated by 2 days, starting at 5 days of age. This cold stress increased longevity, resistance to a lethal heat stress or to cold up to 6 weeks of age, resistance to a non-lethal heat stress at middle age, and delayed behavioral aging. Cold and hypergravity exposure at young age have thus similar effects, excepting on resistance to cold stress, which is not increased after exposure to hypergravity. Mild heat stress has also been shown to slightly increase longevity and resistance to a lethal heat stress, but not to delay behavioral aging. Since there are thus at least two mild stresses with large hormetic effects at old age in flies, i.e. cold and hypergravity, hormetic effects in flies are not stress-specific. Therefore, it could be hypothetized that hormetic effects of mild stress on aging and longevity are a general phenomenon and that they could also be observed in other species such as rodents.
Starting Page	431
Ending Page	444
Page Count	14
File Format	PDF
ISSN	13895729
Journal	Biogerontology
Volume Number	8
Issue Number	4
e-ISSN	15736768
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2007-02-23
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Aging Longevity Cold shock Behavior Hormesis Stress Drosophila melanogaster Developmental Biology Geriatrics/Gerontology Cell Biology
Content Type	Text
Resource Type	Article
Subject	Aging Gerontology Geriatrics and Gerontology

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