Cardioprotection and lifespan extension by the natural polyamine spermidine

Eisenberg T, Knauer H, Schauer A, Büttner S, Ruckenstuhl C, Carmona-Gutierrez D, Ring J, Schroeder S, Magnes C, Antonacci L, Fussi H, Deszcz L, Hartl R, Schraml E, Criollo A, Megalou E, Weiskopf D, Laun P, Heeren G, Breitenbach M, Grubeck-Loebenstein B, Herker E, Fahrenkrog B, Fröhlich KU, Sinner F, Tavernarakis N, Minois N, Kroemer G, Madeo F

Published in Nature Medicine

Abstract

Landmark study showing spermidine supplementation extends lifespan across multiple species and protects against cardiovascular disease through autophagy induction. Demonstrates cardioprotection in aged mice and epidemiological benefits in humans.

Methodology

Multi-species preclinical study combining lifespan assays, rodent cardiac phenotyping and autophagy-deficient controls, plus analysis of a human population cohort.

Key Findings

Dietary spermidine extended lifespan in yeast, flies, worms and mice, and in aged mice it preserved cardiac diastolic function, reduced hypertrophy and lowered blood pressure. Benefits required intact autophagy and were absent in autophagy-deficient animals. Human cohort data (Bruneck study) linked higher spermidine intake to lower cardiovascular mortality.

Conclusions

Spermidine is cardioprotective and lifespan-extending in animal models through an autophagy-dependent mechanism, with supportive epidemiological signals in humans awaiting randomised confirmation.

Limitations

Primary evidence is preclinical; the human component is observational and diet-confounded, and effective human dosing has not been established in outcome trials.