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- W2964804972 abstract "Abstract Aging is associated with reduced capacity for tissue repair, perhaps the most critical of which is a decline in the ability of aged neurons to recover after injury. Identifying factors that improve the regenerative ability of aging neurons is a prerequisite for therapy design and remains an enormous challenge, yet many of the genes that play a role in regeneration of youthful axons do not regulate axon regeneration in older animals 2,9 , highlighting the need to identify aging-specific regeneration mechanisms. Previously, we found that increased DAF-16/FOXO activity enhances the regenerative ability of mechanosensory axons in aged animals 9 . Here we show that DAF-16/FOXO mediates its pro-regenerative effects by upregulating folate metabolism genes via the ZIP-5 bZIP transcription factor. Remarkably, dietary folic acid supplementation improves the regeneration of aging C. elegans axons. Enzymes regulating folate metabolism are also up-regulated in regenerating zebrafish fins, and we show that dietary folic acid supplementation post-amputation enhances fin regrowth in aging zebrafish. Our results demonstrate that boosting folate metabolism is a conserved and non-invasive approach to increase the regenerative capacity of aging neurons and tissues. Given that lower folate status has been linked with reduced cognition in the elderly 17 , maintaining optimal folate metabolism may be a general strategy to achieve healthy brain aging." @default.
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- W2964804972 date "2019-08-06" @default.
- W2964804972 modified "2023-09-23" @default.
- W2964804972 title "ZIP-5/bZIP transcription factor regulation of folate metabolism is critical for aging axon regeneration" @default.
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- W2964804972 doi "https://doi.org/10.1101/727719" @default.
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