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Updated: Jul 24, 2025
09:14
Evaluation of Injury-induced Senescence and In Vivo Reprogramming in the Skeletal Muscle
Published on: October 26, 2017
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Partial cellular reprogramming stably restores the stemness of senescent epidermal stem cells
1State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China. wangzhichong@gzzoc.com.
Summary
Partial reprogramming using OSKM factors rejuvenates senescent stem cells, restoring self-renewal and proliferation without losing cell identity. This approach shows promise for treating age-associated diseases.
Area of Science:
- Stem cell biology
- Aging research
- Regenerative medicine
Background:
- Adult stem cell senescence drives organismal aging and age-associated diseases.
- Restoring stem cell self-renewal offers therapeutic targets for healthspan extension.
- Partial cellular reprogramming via OSKM factors can ameliorate age-related hallmarks in somatic cells.
Purpose of the Study:
- To investigate the effects of partial reprogramming on senescent epidermal stem cells (ESCs).
- To determine if transient OSKM expression can restore self-renewal and youthful characteristics in aged ESCs.
- To explore the impact of partial reprogramming on cellular identity and DNA methylation patterns.
Main Methods:
- Senescent Integrin-α6highCD71high ESCs were treated with transient OSKM expression.
- Self-renewal ability was assessed by secondary clone generation and proliferation assays.
- Stem cell markers (p63, Ki67) and epidermal cell markers were analyzed.
- DNA methylation age (eAge) and DNA methyltransferase activity were evaluated.
Main Results:
- Partial reprogramming restored youthful self-renewal and proliferation in senescent ESCs.
- Epithelial cellular identity was preserved post-reprogramming.
- Rejuvenation effects were maintained for 2 weeks after OSKM withdrawal.
- Partial reprogramming counteracted accelerated eAge in senescent ESCs, with DNMT1 playing a potential role.
Conclusions:
- Partial reprogramming effectively rejuvenates senescent adult stem cells.
- This method holds significant therapeutic potential for treating age-associated diseases.
- It offers a novel strategy for reversing stem cell aging and extending healthspan.
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