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- W2974124960 abstract "Abstract Supplementation with the NAD + precursor nicotinamide riboside (NR) ameliorates and prevents a broad array of metabolic and aging disorders in mice. However, little is known about the physiological role of endogenous NR metabolism. We have previously shown that NR kinase 1 (NRK1) is rate-limiting and essential for NR-induced NAD + synthesis in hepatic cells. To understand the relevance of hepatic NR metabolism, we generated whole body and liver-specific NRK1 knockout mice. Here, we show that NRK1 deficiency leads to decreased gluconeogenic potential and impaired mitochondrial function. Upon high-fat feeding, NRK1 deficient mice develop glucose intolerance, insulin resistance and hepatosteatosis. Furthermore, they are more susceptible to diet-induced liver DNA damage, due to compromised PARP1 activity. Our results demonstrate that endogenous NR metabolism is critical to sustain hepatic NAD + levels and hinder diet-induced metabolic damage, highlighting the relevance of NRK1 as a therapeutic target for metabolic disorders." @default.
- W2974124960 created "2019-09-26" @default.
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- W2974124960 date "2019-09-20" @default.
- W2974124960 modified "2023-10-06" @default.
- W2974124960 title "Endogenous nicotinamide riboside metabolism protects against diet-induced liver damage" @default.
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- W2974124960 doi "https://doi.org/10.1038/s41467-019-12262-x" @default.
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