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A Youthful Touch: Reversal of Aging Hallmarks by Cell Reprogramming
Eleni Miliotou1,2, Irene de Lázaro1,2,3
1Department of Biomedical Engineering, NYU Tandon School of Engineering, New York University, New York, New York, USA.
Background:
With the elderly population projected to double by 2050, there is an urgent need to address the increasing prevalence of age-related debilitating diseases and ultimately minimize discrepancies between the rising lifespan and stagnant health span. Cellular reprogramming by overexpression of Oct3/4, Klf4, Sox2, and cMyc (OKSM) transcription factors is gaining attention in this context thanks to demonstrated rejuvenating effects in human cell cultures and live mice, many of which can be uncoupled from dedifferentiation and loss of cell identity.
Summary:
Here, we review current evidence of the impact of cell reprogramming on established aging hallmarks and the underlying mechanisms that mediate these effects. We also provide a critical assessment of the challenges in translating these findings and, overall, cell reprogramming technologies into clinically translatable antiaging interventions.
Key Messages:
Cellular reprogramming has the potential to reverse at least partially some key hallmarks of aging. However, further research is necessary to determine the biological significance and duration of such changes and to ensure the safety of cell reprogramming as a rejuvenation approach. With this review, we hope to stimulate new research directions in the quest to extend health span effectively.
Insights
Cellular reprogramming shows promise for reversing aging hallmarks, potentially extending health span. Further research is crucial to ensure safety and efficacy for clinical anti-aging applications.
Area of Science:
- Biogerontology
- Cellular and Molecular Biology
- Regenerative Medicine
Background:
- Aging population growth necessitates interventions for age-related diseases.
- Cellular reprogramming using Oct3/4, Klf4, Sox2, and cMyc (OKSM) transcription factors demonstrates rejuvenating effects.
- Rejuvenation effects can occur without dedifferentiation or loss of cell identity.
Purpose of the Study:
- Review evidence on cellular reprogramming's impact on aging hallmarks.
- Investigate the mechanisms underlying reprogramming-induced rejuvenation.
- Critically assess challenges for clinical translation of anti-aging interventions.
Main Methods:
- Literature review of cellular reprogramming studies.
- Analysis of mechanisms mediating rejuvenation.
- Assessment of clinical translation challenges.
Main Results:
- Cellular reprogramming can partially reverse key aging hallmarks.
- Mechanisms of action are being elucidated.
- Significant challenges exist in translating reprogramming to clinical practice.
Conclusions:
- Cellular reprogramming holds potential for partial reversal of aging hallmarks.
- Further research is needed to confirm biological significance, duration, and safety.
- Stimulating new research directions for effective health span extension.
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