Caloric restriction maintains stem cells through niche and regulates stem cell aging

Area of Science:

• Gerontology and Regenerative Medicine
• Cellular Metabolism and Aging
• Stem Cell Biology

Background:

• Functional decline of adult stem cells contributes significantly to aging and age-related diseases.
• Stem cell aging is influenced by intrinsic factors like energy metabolism and extrinsic factors such as the stem cell niche.
• Cellular damage and altered metabolism impair stem cell function and regenerative capacity.

Purpose of the Study:

• To review the stimuli of adult stem cell aging, focusing on energy metabolism and the stem cell niche.
• To discuss the mechanisms by which caloric restriction (CR) impacts adult stem cells and their niches.
• To elucidate how CR can enhance stem cell function and maintain tissue homeostasis.

Main Methods:

• Literature review of studies on adult stem cell aging, energy metabolism, stem cell niche, and caloric restriction.
• Analysis of intrinsic and extrinsic factors affecting stem cell function.
• Synthesis of evidence on the role of CR in modulating stem cell niche and metabolism.

Main Results:

• Caloric restriction (CR) demonstrates beneficial effects on stem cell maintenance and tissue regeneration.
• CR modulates the stem cell niche by reducing energy metabolism, thereby decreasing cellular damage.
• Evidence suggests CR plays a preventive role in stem cell aging.

Conclusions:

• Regulating energy metabolism and maintaining the stem cell niche are critical for stem cell function and tissue homeostasis.
• Caloric restriction emerges as a key intervention for enhancing stem cell resilience and promoting longevity.
• CR's ability to preserve stem cell function through niche modulation offers therapeutic potential for age-related decline.