Journal
CELL REPORTS
Volume 14, Issue 8, Pages 1883-1891Publisher
CELL PRESS
DOI: 10.1016/j.celrep.2016.02.003
Keywords
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Categories
Funding
- St George's University of London Enterprize Fund
- ERC [260862]
- NC3Rs [NC/L001780/1]
- MINECO [SAF2013-41177-R]
- ISCIII [RD12/0043/0021]
- EU-SP3-People-MC-ITN [608381]
- NIH/NIDA [1R21DA037678-01]
- Action Medical Research
- Henry Smith Charity [GN2158]
- Barts
- London Charity [417/2088]
- EU [666918]
- BBSRC [BB/L020874/1] Funding Source: UKRI
- MRC [MC_PC_14118] Funding Source: UKRI
- Action Medical Research [2158] Funding Source: researchfish
- Barts Charity [MGU0313] Funding Source: researchfish
- Biotechnology and Biological Sciences Research Council [BB/L020874/1] Funding Source: researchfish
- Fight for Sight [1558/59] Funding Source: researchfish
- Medical Research Council [MC_PC_14118] Funding Source: researchfish
- National Centre for the Replacement, Refinement and Reduction of Animals in Research (NC3Rs) [NC/L001780/1] Funding Source: researchfish
- Versus Arthritis [19207] Funding Source: researchfish
- European Research Council (ERC) [260862] Funding Source: European Research Council (ERC)
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The potential of induced pluripotent stem cells (iPSCs) in disease modeling and regenerative medicine is vast, but current methodologies remain inefficient. Understanding the cellular mechanisms underlying iPSC reprogramming, such as the metabolic shift from oxidative to glycolytic energy production, is key to improving its efficiency. We have developed a lentiviral reporter system to assay longitudinal changes in cell signaling and transcription factor activity in living cells throughout iPSC reprogramming of human dermal fibroblasts. We reveal early NF-kappa B, AP-1, and NRF2 transcription factor activation prior to a temporal peak in hypoxia inducible factor alpha (HIF alpha) activity. Mechanistically, we show that an early burst in oxidative phosphorylation and elevated reactive oxygen species generation mediates increased NRF2 activity, which in turn initiates the HIF alpha-mediated glycolytic shift and may modulate glucose redistribution to the pentose phosphate pathway. Critically, inhibition of NRF2 by KEAP1 overexpression compromises metabolic reprogramming and results in reduced efficiency of iPSC colony formation.
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