Cellular Models of Aging and Senescence

Area of Science:

• Gerontology and Cellular Biology
• Biomedical Research and Disease Modeling

Background:

• Aging is a primary risk factor for numerous chronic diseases, necessitating research into its cellular underpinnings.
• Understanding the biological mechanisms of aging is crucial for developing interventions to extend human health span.

Purpose of the Study:

• To review the utility of in vitro models in aging research, from foundational discoveries to advanced stem cell applications.
• To examine strategies for manipulating cellular aging and discuss the translation of in vitro findings to organism-wide healthspan interventions.

Main Methods:

• Discussion of key in vitro models including immortalized cell lines and human induced pluripotent stem cells (iPSCs).
• Exploration of methods to induce senescence and differentiate between chronological and biological aging.
• Analysis of experimental strategies such as senolytics, epigenetic reprogramming, and modulation of proteostasis and mitochondrial function.

Main Results:

• In vitro models, despite limitations, are invaluable for dissecting specific mechanistic questions in aging.
• Various experimental strategies show promise in manipulating cellular aging phenotypes.
• Human induced pluripotent stem cells (iPSCs) offer transformative potential for aging and rejuvenation studies.

Conclusions:

• In vitro systems are critical for discovery and therapeutic testing in aging research.
• Translating cellular aging insights into effective organism-wide strategies remains a significant challenge.