Cell and Cell-Free Therapies to Counteract Human Premature and Physiological Aging: MSCs Come to Light

Area of Science:

• Gerontology and Regenerative Medicine
• Stem Cell Biology
• Tissue Engineering

Background:

• Aging leads to progressive loss of tissue regenerative capacity, driven by factors like cellular senescence and stem cell exhaustion.
• Mesenchymal stem cells (MSCs), crucial for mesenchymal tissues (bone, cartilage, fat), are particularly affected by aging, exhibiting reduced proliferation and impaired differentiation/secretion.
• Senescent MSCs contribute to diminished tissue function and homeostasis disruption.

Purpose of the Study:

• To review the potential of Mesenchymal Stem Cell (MSC)-based therapies for counteracting age-related tissue degeneration.
• To assess both cell-based and cell-free (e.g., extracellular vesicles) therapeutic strategies.
• To explore mechanisms of action and methods for enhancing MSC therapy efficacy.

Main Methods:

• Literature review of pre-clinical and clinical data on MSC-based therapies for aging.
• Analysis of mechanisms underlying MSC senescence and function in aging.
• Evaluation of strategies to enhance MSC therapeutic potential, including exposure to niche-relevant signals.

Main Results:

• MSC-based therapies, utilizing young allogeneic MSCs and their derivatives like extracellular vesicles (EVs), demonstrate significant potential in pre-clinical and clinical studies.
• These therapies aim to counteract age-related functional decline in mesenchymal tissues.
• Enhancing MSCs through exposure to niche-relevant signals may further boost their clinical efficacy.

Conclusions:

• MSC-based cell and cell-free therapies offer a promising avenue to combat age-related tissue dysfunction and improve healthspan.
• Understanding and modulating MSC behavior in aging is key to developing effective regenerative strategies.
• Further research into optimizing MSC therapies, potentially by mimicking the stem cell niche, is warranted.