Abstract:
:D-Glucosamine (GlcN) is a freely available and commonly used dietary supplement potentially promoting cartilage health in humans, which also acts as an inhibitor of glycolysis. Here we show that GlcN, independent of the hexosamine pathway, extends Caenorhabditis elegans life span by impairing glucose metabolism that activates AMP-activated protein kinase (AMPK/AAK-2) and increases mitochondrial biogenesis. Consistent with the concept of mitohormesis, GlcN promotes increased formation of mitochondrial reactive oxygen species (ROS) culminating in increased expression of the nematodal amino acid-transporter 1 (aat-1) gene. Ameliorating mitochondrial ROS formation or impairment of aat-1-expression abolishes GlcN-mediated life span extension in an NRF2/SKN-1-dependent fashion. Unlike other calorie restriction mimetics, such as 2-deoxyglucose, GlcN extends life span of ageing C57BL/6 mice, which show an induction of mitochondrial biogenesis, lowered blood glucose levels, enhanced expression of several murine amino-acid transporters, as well as increased amino-acid catabolism. Taken together, we provide evidence that GlcN extends life span in evolutionary distinct species by mimicking a low-carbohydrate diet.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Weimer S,Priebs J,Kuhlow D,Groth M,Priebe S,Mansfeld J,Merry TL,Dubuis S,Laube B,Pfeiffer AF,Schulz TJ,Guthke R,Platzer M,Zamboni N,Zarse K,Ristow Mdoi
10.1038/ncomms4563subject
Has Abstractpub_date
2014-04-08 00:00:00pages
3563issn
2041-1723pii
ncomms4563journal_volume
5pub_type
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