Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
SHR Neuro Krebs Kardio Lipid Stoffw Microb
Schroeder, S; Hofer, SJ; Zimmermann, A; Pechlaner, R; Dammbrueck, C; Pendl, T; Marcello, GM; Pogatschnigg, V; Bergmann, M; Müller, M; Gschiel, V; Ristic, S; Tadic, J; Iwata, K; Richter, G; Farzi, A; Üçal, M; Schäfer, U; Poglitsch, M; Royer, P; Mekis, R; Agreiter, M; Tölle, RC; Sótonyi, P; Willeit, J; Mairhofer, B; Niederkofler, H; Pallhuber, I; Rungger, G; Tilg, H; Defrancesco, M; Marksteiner, J; Sinner, F; Magnes, C; Pieber, TR; Holzer, P; Kroemer, G; Carmona-Gutierrez, D; Scorrano, L; Dengjel, J; Madl, T; Sedej, S; Sigrist, SJ; Rácz, B; Kiechl, S; Eisenberg, T; Madeo, F.
Dietary spermidine improves cognitive function.
Cell Rep. 2021; 35(2):108985-108985
Doi: 10.1016/j.celrep.2021.108985
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- Führende Autor*innen der Med Uni Graz
- Eisenberg Tobias
- Co-Autor*innen der Med Uni Graz
- Agreiter Marlene
- Farzi Aitak
- Holzer Peter
- Madl Tobias
- Pieber Thomas
- Pogatschnigg Viktoria
- Richter Gesa Lucia
- Schäfer Ute
- Sedej Simon
- Sinner Frank Michael
- Tadic Jelena
- Ücal Muammer
- Zimmermann Andreas
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- Abstract:
- Decreased cognitive performance is a hallmark of brain aging, but the underlying mechanisms and potential therapeutic avenues remain poorly understood. Recent studies have revealed health-protective and lifespan-extending effects of dietary spermidine, a natural autophagy-promoting polyamine. Here, we show that dietary spermidine passes the blood-brain barrier in mice and increases hippocampal eIF5A hypusination and mitochondrial function. Spermidine feeding in aged mice affects behavior in homecage environment tasks, improves spatial learning, and increases hippocampal respiratory competence. In a Drosophila aging model, spermidine boosts mitochondrial respiratory capacity, an effect that requires the autophagy regulator Atg7 and the mitophagy mediators Parkin and Pink1. Neuron-specific Pink1 knockdown abolishes spermidine-induced improvement of olfactory associative learning. This suggests that the maintenance of mitochondrial and autophagic function is essential for enhanced cognition by spermidine feeding. Finally, we show large-scale prospective data linking higher dietary spermidine intake with a reduced risk for cognitive impairment in humans. Copyright © 2021 The Authors. Published by Elsevier Inc. All rights reserved.