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2015 ; 37
(2
): 31
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Impacts of metformin and aspirin on life history features and longevity of
crickets: trade-offs versus cost-free life extension?
#MMPMID25833406
Hans H
; Lone A
; Aksenov V
; Rollo CD
Age (Dordr)
2015[]; 37
(2
): 31
PMID25833406
show ga
We examined the impacts of aspirin and metformin on the life history of the
cricket Acheta domesticus (growth rate, maturation time, mature body size,
survivorship, and maximal longevity). Both drugs significantly increased
survivorship and maximal life span. Maximal longevity was 136 days for controls,
188 days (138 % of controls) for metformin, and 194 days (143 % of controls) for
aspirin. Metformin and aspirin in combination extended longevity to a lesser
degree (163 days, 120 % of controls). Increases in general survivorship were even
more pronounced, with low-dose aspirin yielding mean longevity 234 % of controls
(i.e., health span). Metformin strongly reduced growth rates of both genders (<60
% of controls), whereas aspirin only slightly reduced the growth rate of females
and slightly increased that of males. Both drugs delayed maturation age relative
to controls, but metformin had a much greater impact (>140 % of controls) than
aspirin (~118 % of controls). Crickets maturing on low aspirin showed no evidence
of a trade-off between maturation mass and life extension. Remarkably, by 100
days of age, aspirin-treated females were significantly larger than controls
(largely reflecting egg complement). Unlike the reigning dietary restriction
paradigm, low aspirin conformed to a paradigm of "eat more, live longer." In
contrast, metformin-treated females were only ~67 % of the mass of controls. Our
results suggest that hormetic agents like metformin may derive significant
trade-offs with life extension, whereas health and longevity benefits may be
obtained with less cost by agents like aspirin that regulate geroprotective
pathways.