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Article Publish Status: FREE
Abstract Title:

Nicotinamide riboside attenuates age-associated metabolic and functional changes in hematopoietic stem cells.

Abstract Source:

Nat Commun. 2021 May 11 ;12(1):2665. Epub 2021 May 11. PMID: 33976125

Abstract Author(s):

Xuan Sun, Benjamin Cao, Marina Naval-Sanchez, Tony Pham, Yu Bo Yang Sun, Brenda Williams, Shen Y Heazlewood, Nikita Deshpande, Jinhua Li, Felix Kraus, James Rae, Quan Nguyen, Hamed Yari, Jan Schröder, Chad K Heazlewood, Madeline Fulton, Jessica Hatwell-Humble, Kaustav Das Gupta, Ronan Kapetanovic, Xiaoli Chen, Matthew J Sweet, Robert G Parton, Michael T Ryan, Jose M Polo, Christian M Nefzger, Susan K Nilsson

Article Affiliation:

Xuan Sun

Abstract:

With age, hematopoietic stem cells (HSC) undergo changes in function, including reduced regenerative potential and loss of quiescence, which is accompanied by a significant expansion of the stem cell pool that can lead to haematological disorders. Elevated metabolic activity has been implicated in driving the HSC ageing phenotype. Here we show that nicotinamide riboside (NR), a form of vitamin B3, restores youthful metabolic capacity by modifying mitochondrial function in multiple ways including reduced expression of nuclear encoded metabolic pathway genes, damping of mitochondrial stress and a decrease in mitochondrial mass and network-size. Metabolic restoration is dependent on continuous NR supplementation and accompanied by a shift of the aged transcriptome towards the young HSC state, more youthful bone marrow cellular composition and an improved regenerative capacity in a transplant setting. Consequently, NR administration could support healthy ageing by re-establishing a more youthful hematopoietic system.

Study Type : In Vitro Study

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