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Reprogramming Mouse Embryonic Fibroblasts with Transcription Factors to Induce a Hemogenic Program
Published on: December 16, 2016
MicroRNAs are indispensable for reprogramming mouse embryonic fibroblasts into induced stem cell-like cells
Byeong-Moo Kim1, Marc-Christian Thier, Sangnam Oh
1Department of Medicine/GI Unit, Massachusetts General Hospital, Boston, Massachusetts, United States of America.
Plos One
|June 28, 2012
Summary
MicroRNAs are essential for cellular reprogramming. Studies show that without functional microRNAs, mouse embryonic fibroblasts (MEFs) cannot be reprogrammed into embryonic stem cells (ESCs), highlighting microRNAs' indispensable role.
Area of Science:
- Molecular Biology
- Stem Cell Biology
- Genetics
Background:
- MicroRNAs (miRNAs) are crucial regulators of cellular processes like maintenance, proliferation, and differentiation.
- miRNAs are implicated in disease pathogenesis and cellular reprogramming.
- While miRNAs influence reprogramming, their absolute necessity remains unestablished.
Purpose of the Study:
- To determine if microRNAs are indispensable for cellular reprogramming.
- To investigate the role of microRNAs in dedifferentiation using Dicer-null cells.
Main Methods:
- Attempted reprogramming of Dicer-null mouse embryonic fibroblasts (MEFs) lacking functional miRNAs using defined transcription factors.
- Utilized lentiviral or piggyBac transposon vectors for factor transduction.
- Restored Dicer expression in Dicer-null MEFs to assess reprogramming rescue.
Main Results:
- Reprogramming failed in Dicer-null MEFs, indicating a lack of functional miRNAs prevents dedifferentiation into embryonic stem cell-like cells.
- Reintroduction of human Dicer into Dicer-null MEFs restored their capacity for reprogramming.
- These findings demonstrate that miRNAs are critical for the reprogramming process.
Conclusions:
- MicroRNAs are indispensable for dedifferentiation reprogramming.
- The absence of functional miRNAs completely abolishes the ability to reprogram cells.
- This study establishes a fundamental requirement for microRNAs in cellular reprogramming.
