TY - JOUR
T1 - Biological Significance of the Suppression of Oxidative Phosphorylation in Induced Pluripotent Stem Cells
AU - Zhang, Cheng
AU - Skamagki, Maria
AU - Liu, Zhong
AU - Ananthanarayanan, Aparna
AU - Zhao, Rui
AU - Li, Hu
AU - Kim, Kitai
N1 - Publisher Copyright:
© 2017 The Authors
PY - 2017/11/21
Y1 - 2017/11/21
N2 - We discovered that induced pluripotent stem cell (iPSC) clones generated from aged tissue donors (A-iPSCs) fail to suppress oxidative phosphorylation. Compared to embryonic stem cells (ESCs) and iPSCs generated from young donors (Y-iPSCs), A-iPSCs show poor expression of the pluripotent stem cell-specific glucose transporter 3 (GLUT3) and impaired glucose uptake, making them unable to support the high glucose demands of glycolysis. Persistent oxidative phosphorylation in A-iPSCs generates higher levels of reactive oxygen species (ROS), which leads to excessive elevation of glutathione (a ROS-scavenging metabolite) and a blunted DNA damage response. These phenotypes were recapitulated in Y-iPSCs by inhibiting pyruvate dehydrogenase kinase (PDK) or supplying citrate to activate oxidative phosphorylation. In addition, oxidative phosphorylation in A-iPSC clones depletes citrate, a nuclear source of acetyl group donors for histone acetylation; this consequently alters histone acetylation status. Expression of GLUT3 in A-iPSCs recovers the metabolic defect, DNA damage response, and histone acetylation status. Zhang et al. demonstrate that GLUT3 suppresses somatic cell-specific oxidative phosphorylation in pluripotent stem cells. Low GLUT3 results in higher glutathione, blunting the DNA damage response, and citrate depletion, reducing histone acetylation. Expression of GLUT3 restores regulation.
AB - We discovered that induced pluripotent stem cell (iPSC) clones generated from aged tissue donors (A-iPSCs) fail to suppress oxidative phosphorylation. Compared to embryonic stem cells (ESCs) and iPSCs generated from young donors (Y-iPSCs), A-iPSCs show poor expression of the pluripotent stem cell-specific glucose transporter 3 (GLUT3) and impaired glucose uptake, making them unable to support the high glucose demands of glycolysis. Persistent oxidative phosphorylation in A-iPSCs generates higher levels of reactive oxygen species (ROS), which leads to excessive elevation of glutathione (a ROS-scavenging metabolite) and a blunted DNA damage response. These phenotypes were recapitulated in Y-iPSCs by inhibiting pyruvate dehydrogenase kinase (PDK) or supplying citrate to activate oxidative phosphorylation. In addition, oxidative phosphorylation in A-iPSC clones depletes citrate, a nuclear source of acetyl group donors for histone acetylation; this consequently alters histone acetylation status. Expression of GLUT3 in A-iPSCs recovers the metabolic defect, DNA damage response, and histone acetylation status. Zhang et al. demonstrate that GLUT3 suppresses somatic cell-specific oxidative phosphorylation in pluripotent stem cells. Low GLUT3 results in higher glutathione, blunting the DNA damage response, and citrate depletion, reducing histone acetylation. Expression of GLUT3 restores regulation.
KW - DNA damage response
KW - ROS
KW - histone acetylation
KW - homeostatic balance
KW - induced pluripotent stem cells
KW - oxidative phosphorylation
KW - reactive oxygen species
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U2 - 10.1016/j.celrep.2017.10.098
DO - 10.1016/j.celrep.2017.10.098
M3 - Article
C2 - 29166598
AN - SCOPUS:85034812063
SN - 2211-1247
VL - 21
SP - 2058
EP - 2065
JO - Cell reports
JF - Cell reports
IS - 8
ER -