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Reprogramming of mouse somatic cells into pluripotent stem-like cells using a combination of small molecules

Phil Jun Kang1, Jai-Hee Moon1, Byung Sun Yoon2

  • 1Laboratory of Cell Function Regulation, Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 136-701, Republic of Korea.

Biomaterials
|June 3, 2014
PubMed

Insights

Small molecules can reprogram somatic cells into induced pluripotent stem cell-like cells (iPSLCs) without genetic modification. This chemical reprogramming bypasses concerns associated with traditional methods, offering a safer alternative for potential clinical applications.

Area of Science:

  • Stem Cell Biology
  • Epigenetics
  • Chemical Biology

Background:

  • Induced pluripotent stem cells (iPSCs) are generated using transcription factor overexpression, raising clinical concerns.
  • Alternative reprogramming methods are needed to overcome the limitations of genetic manipulation.

Purpose of the Study:

  • To develop a method for generating iPS-like cells (iPSLCs) from somatic cells using small molecule compounds.
  • To investigate the sufficiency of specific small molecules and pathways in cellular reprogramming.

Main Methods:

  • Two-step reprogramming of mouse astrocytes using Bmi1 to generate induced epiblast stem cell-like cells (iEpiSCLCs).
  • Further differentiation of iEpiSCLCs into iPSLCs using MEK/ERK and GSK3 pathway inhibitors with leukemia inhibitory factor.
  • Replacement of Bmi1 with Shh activators (oxysterol, purmorphamine) for direct chemical reprogramming.

Main Results:

  • Bmi1 successfully reprogrammed astrocytes into intermediate iEpiSCLCs with stem cell characteristics.
  • Chemical inhibitors and factors converted iEpiSCLCs into iPSLCs resembling mouse embryonic stem cells (mESCs).
  • Shh activators replaced Bmi1, enabling direct reprogramming of somatic cells into chemically induced pluripotent stem cell-like cells (ciPSLCs).

Conclusions:

  • Small molecules can effectively reprogram somatic cells into iPSLCs, offering a safer alternative to genetic methods.
  • The study demonstrates the potential of chemical reprogramming for generating pluripotent stem cells for clinical use.
Keywords:
Bmi1Induced pluripotent stem cell (iPSC)ReprogrammingSmall molecule compounds

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