Abstract
Betalain-rich extracts have been used for many years by their nutraceutical potential. However, the study of their bioactivities has always been hampered by their difficult obtention. To explain their mode of action, seventeen pure betalains were tested in vivo using the animal model C. elegans. Four betalains, named indicaxanthin, indoline carboxylic acid-betacyanin, phenylalanine-betaxanthin, and dopaxanthin, behaved as extraordinary in vivo antioxidants and anti-aging compounds, by increasing the lifespan of C. elegans up to 16.82%, 16.65%, 16.53%, and 12.93%, respectively. The first microarrays performed with betalains and biological confirmation with different mutant strains showed that this life extension is due to a reduction of oxidative stress and the activation of the transcription factors DAF-16/FOXO and SKN-1/Nrf2. They are involved in longevity and oxidative stress resistance pathways and lead to overexpression of HSPs genes, involved in resistance to cancer and Alzheimer's, opening novel research lines in the search for effective plant-based treatments.
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