The autophagy inducer spermidine reverses arterial aging
LaRocca TJ, Gioscia-Ryan RA, Hearon CM Jr, Seals DR
Published in Mechanisms of Ageing and Development
Abstract
Study demonstrating that spermidine supplementation improves arterial function in old mice through autophagy activation, reducing arterial stiffness and improving endothelial function comparable to caloric restriction.
Methodology
Preclinical study in young and old mice given spermidine in drinking water, with ex vivo assessment of aortic endothelium-dependent dilation, arterial stiffness (pulse wave velocity), oxidative stress and autophagy markers; complemented by cultured endothelial cell work.
Key Findings
Spermidine supplementation restored endothelium-dependent dilation and reduced aortic stiffness in old mice toward levels seen in young animals. Improvements were accompanied by increased markers of autophagy, reduced arterial oxidative stress and lower superoxide production; blocking autophagy abolished the benefit.
Conclusions
In mice, spermidine reverses key features of arterial ageing through autophagy activation and reduced oxidative stress, providing a mechanistic rationale for studying spermidine as a vascular ageing intervention.
Limitations
Animal study only; no human vascular outcome data. Dosing in drinking water does not map to human dietary or supplemental intake, and human spermidine trials to date have measured surrogate markers rather than arterial ageing outcomes.
Supplements Studied
Spermidine supplementation restored endothelium-dependent dilation and reduced aortic stiffness in old mice toward levels seen in young animals. Improvements were accompanied by increased markers of autophagy, reduced arterial oxidative stress and lower superoxide production; blocking autophagy abolished the benefit.
Outcomes Measured
Spermidine supplementation improves arterial function in old mice through autophagy activation, reducing arterial stiffness comparable to caloric restriction.
Study Details
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