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08:01
A Two-Step Strategy that Combines Epigenetic Modification and Biomechanical Cues to Generate Mammalian Pluripotent Cells
Published on: August 29, 2020
A combined epigenetic and non-genetic approach for reprogramming human somatic cells
Jinnuo Han1, Perminder S Sachdev, Kuldip S Sidhu
1Faculty of Medicine, University of New South Wales, Sydney, Australia.
Plos One
|September 3, 2010
Summary
This study introduces a novel epigenetic reprogramming method using DNA methyltransferase (DNMT) and histone deacetylase (HDAC) inhibitors combined with human embryonic stem cell (hESC) extracts. This approach enhances somatic cell reprogramming efficiency without exogenous materials.
Area of Science:
- Cell Biology
- Epigenetics
- Stem Cell Research
Background:
- Somatic cell reprogramming is crucial for regenerative medicine but often requires exogenous materials and has low efficiency.
- Existing methods for somatic cell reprogramming, including somatic cell nuclear transfer (SCNT) and induced pluripotent stem (iPS) cell generation, face challenges with efficiency and the need for foreign substances.
Purpose of the Study:
- To investigate a novel combined epigenetic and non-genetic approach for reprogramming somatic cells.
- To evaluate the efficiency of using DNA methyltransferase (DNMT) and histone deacetylase (HDAC) inhibitors combined with human embryonic stem cell (hESC) extracts for somatic cell reprogramming.
- To determine the role of epigenetic modifications and hESC extracts in enhancing reprogramming efficiency.
Main Methods:
- Somatic cells were pretreated with DNMT and HDAC inhibitors.
- Pretreated cells were exposed to hESC (MEL1) extracts.
- Morphological analysis was used to assess hESC-like colony formation.
- Quantitative PCR (qPCR) was employed to measure the expression of pluripotency genes.
- Changes in DNA methylation and histone acetylation levels were analyzed.
Main Results:
- Pretreatment with epigenetic inhibitors significantly increased the rate of hESC-like colony formation compared to untreated cells or cells treated with hESC extracts alone.
- Quantitative PCR confirmed upregulation of pluripotency genes in pretreated cells.
- Analysis indicated that epigenetic states influence reprogramming efficiency induced by hESC extracts.
- KnockOut serum replacement (KOSR) medium positively influenced pluripotency gene expression.
Conclusions:
- hESC extracts offer a promising alternative for reprogramming somatic cells without introducing exogenous materials.
- Epigenetic pre-treatment of somatic cells can significantly improve the efficiency of reprogramming processes.
- The reprogrammed cells demonstrated potential for transdifferentiation, exhibiting neuronal differentiation capabilities, although full reprogramming was not achieved.
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