Aging refers to the gradual physiological changes that
occur in
an organism after reaching adulthood, resulting in senescence and
a decline in biological functions, ultimately leading to death. Epidemiological
evidence shows that aging is a driving factor in the developing of
various diseases, including cardiovascular diseases, neurodegenerative
diseases, immune system disorders, cancer, and chronic low-grade inflammation.
Natural plant polysaccharides have emerged as crucial food components
in delaying the aging process. Therefore, it is essential to continuously
investigate plant polysaccharides as potential sources of new pharmaceuticals
for aging. Modern pharmacological research indicates that plant polysaccharides
can exert antiaging effects by scavenging free radicals, increasing
telomerase activity, regulating apoptosis, enhancing immunity, inhibiting
glycosylation, improving mitochondrial dysfunction regulating gene
expression, activating autophagy, and modulating gut microbiota. Moreover,
the antiaging activity of plant polysaccharides is mediated by one
or more signaling pathways, including IIS, mTOR, Nrf2, NF-κB,
Sirtuin, p53, MAPK, and UPR signaling pathways. This review summarizes
the antiaging properties of plant polysaccharides and signaling pathways
participating in the polysaccharide-regulating aging process. Finally,
we discuss the structure–activity relationships of antiaging
polysaccharides.