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PHLDA3 impedes somatic cell reprogramming by activating Akt-GSK3β pathway

Mengran Qiao1, Mian Wu2, Ronghua Shi3

  • 1CAS Key Laboratory of Innate Immunity and Chronic Disease, CAS Center for Excellence in Cell and Molecular Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, University of Science & Technology of China, Hefei, 230027, China.

Scientific Reports
|June 8, 2017
PubMed

Insights

PHLDA3, a p53 target gene, blocks induced pluripotent stem cell (iPSC) generation by activating the Akt-GSK3β pathway. Oct4 also regulates PHLDA3, revealing its role in the somatic cell reprogramming network.

Area of Science:

  • Stem cell biology
  • Molecular biology
  • Cancer research

Background:

  • Somatic cell reprogramming into induced pluripotent stem cells (iPSCs) is crucial for regenerative medicine.
  • The tumor suppressor p53 and its target genes are known regulators of this process.
  • Understanding the molecular mechanisms governing reprogramming efficiency is essential for clinical applications.

Purpose of the Study:

  • To investigate the role of PHLDA3, a p53 target gene, in induced pluripotent stem cell generation.
  • To elucidate the molecular pathway through which PHLDA3 affects reprogramming.
  • To identify novel regulatory factors within the somatic cell reprogramming network.

Main Methods:

  • Utilized molecular biology techniques to study PHLDA3 expression and function during reprogramming.
  • Investigated the interaction between PHLDA3, p53, Oct4, and the Akt-GSK3β pathway.
  • Assessed the impact of PHLDA3 modulation on the efficiency of induced pluripotent stem cell generation.

Main Results:

  • PHLDA3 was identified as a functional blocker of induced pluripotent stem cell generation.
  • PHLDA3 activates the Akt-GSK3β pathway, inhibiting reprogramming.
  • PHLDA3 is transcriptionally regulated by Oct4, a key pluripotency factor.

Conclusions:

  • PHLDA3 acts as a novel inhibitory factor in the somatic cell reprogramming process.
  • The findings highlight PHLDA3's role in the intricate regulatory network controlling pluripotency.
  • Targeting PHLDA3 may offer a strategy to enhance induced pluripotent stem cell generation for therapeutic purposes.

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