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Spermidine-induced hypusination preserves mitochondrial and cognitive function during aging.

Sebastian J Hofer^1,2,3, YongTian Liang⁴, Andreas Zimmermann^1,2,3

¹Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria.

|June 9, 2021

Summary

Dietary spermidine supplementation, found in foods like wheat germ and nuts, extends lifespan and improves brain function in aging fruit flies and mice by boosting cellular repair processes.

Keywords:

Autophagy Drosophila Pink1 hypusination learning memory mitophagy polyamines spermidine

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Area of Science:

Cellular Biology
Neuroscience
Aging Research

Background:

Spermidine, a natural polyamine, is vital for cellular homeostasis and promotes autophagy.
Dietary sources include aged cheese, wheat germ, nuts, and fermented foods.
Spermidine levels decline with age, impacting cellular functions.

Purpose of the Study:

To investigate the effects of dietary spermidine supplementation on aging models.
To explore spermidine's impact on eEF5/EIF5A hypusination and cerebral mitochondrial function.
To assess spermidine's influence on cognitive function in aging organisms.

Main Methods:

Supplementation of drinking water with spermidine in aging *Drosophila melanogaster* and mice.
Analysis of eEF5/EIF5A hypusination levels.
Assessment of cerebral mitochondrial function.
Cognitive performance tests.

Main Results:

Dietary spermidine enhanced eEF5/EIF5A hypusination in both fruit flies and mice.
Improved mitochondrial function in the brains of aging mice.
Positive effects on cognitive function observed in aging models.

Conclusions:

Dietary spermidine supplementation is a promising strategy to counteract age-related decline.
Spermidine enhances key cellular processes, including autophagy and mitochondrial function.
Further research into spermidine's therapeutic potential for aging is warranted.