biostudies-literatureLiu Ythe Key-Area Research and Development Program of Guangdong ProvinceGuangdong Basic and Applied Basic Research Foundation3548https://www.ebi.ac.uk/biostudies/studies/S-EPMC12562963biostudies-literatureUnknown14(20)Microbial fermentation diversely modulates the bioactivity of green tea extracts (GTE), but its effects on anti-aging potential remain under-explored. This study investigated the effects of liquid-state fermentation by <i>Aspergillus niger</i> RAF106 on the anti-aging properties of GTE from Biluochun and identified its longevity-promoting metabolites. The unfermented GTE used herein showed no or limited effects, but the four-day fermented tea extracts (GTE-A4) significantly extended the mean lifespan in <i>Caenorhabditis elegans</i>, enhanced motility and stress resistance, and improved mitochondrial function and antioxidant properties, while reducing lipid accumulation and oxidative damage. The pro-longevity effect depended on insulin/IGF-1, MAPK, and p53 pathways and required transcription factors DAF-16 and HSF-1. Fermentation periods shorter or longer than 4 days led to reduced efficacy. Fermentation with RAF106 dynamically altered chemical composition and induced the enrichment of various longevity-promoting metabolites in GTE-A4, including proanthocyanidin A2, aromadendrin, and dalbergioidin-all newly identified as anti-aging agents. These findings demonstrate that RAF106 fermentation improves the anti-aging potential of green tea and provides a scientific basis for using precision fermentation to develop advanced anti-aging functional ingredients from tea extracts.Foods (Basel, Switzerland)Enhancing the Anti-Aging Potential of Green Tea Extracts Through Liquid-State Fermentation with <i>Aspergillus niger</i> RAF106.PMC125629632022B02020400022020B0202260082023A1515030059Liu XYang XLiao ZLiu YFang XZhang XLi RWang JfalseEnhancing the Anti-Aging Potential of Green Tea Extracts Through Liquid-State Fermentation with <i>Aspergillus niger</i> RAF106.Microbial fermentation diversely modulates the bioactivity of green tea extracts (GTE), but its effects on anti-aging potential remain under-explored. This study investigated the effects of liquid-state fermentation by <i>Aspergillus niger</i> RAF106 on the anti-aging properties of GTE from Biluochun and identified its longevity-promoting metabolites. The unfermented GTE used herein showed no or limited effects, but the four-day fermented tea extracts (GTE-A4) significantly extended the mean lifespan in <i>Caenorhabditis elegans</i>, enhanced motility and stress resistance, and improved mitochondrial function and antioxidant properties, while reducing lipid accumulation and oxidative damage. The pro-longevity effect depended on insulin/IGF-1, MAPK, and p53 pathways and required transcription factors DAF-16 and HSF-1. Fermentation periods shorter or longer than 4 days led to reduced efficacy. Fermentation with RAF106 dynamically altered chemical composition and induced the enrichment of various longevity-promoting metabolites in GTE-A4, including proanthocyanidin A2, aromadendrin, and dalbergioidin-all newly identified as anti-aging agents. These findings demonstrate that RAF106 fermentation improves the anti-aging potential of green tea and provides a scientific basis for using precision fermentation to develop advanced anti-aging functional ingredients from tea extracts.2025-01-01T00:00:00Z2025 Oct2026-05-14T03:16:14.053Z2026-05-14T03:11:57.103ZS-EPMC125629634115408410.3390/foods14203548