Can aging oral stem cells be rejuvenated to restore tissue regeneration?

A new Review published in the open-access journal Ageing and Cancer Research & Treatment highlights emerging strategies to rejuvenate aging oral stem cells (OSCs), offering new perspectives for regenerative medicine and the treatment of age-related craniofacial diseases. Rather than viewing stem cell aging as an irreversible process, the authors propose that targeted rejuvenation of OSCs may restore tissue repair, improve oral health, and advance precision regenerative therapies.

In the article, "Oral stem cell aging: From mechanisms to therapeutic rejuvenation" Qianhui Ren, Xinyu Liu, Professor Songtao Shi, and colleagues provide a comprehensive overview of the molecular mechanisms driving oral stem cell aging and examine emerging therapeutic approaches designed to restore their regenerative potential. The Review integrates recent advances in stem cell biology, aging research, and tissue engineering, outlining a roadmap for translating stem cell rejuvenation into future clinical applications.

Oral stem cells are a unique population of mesenchymal stem cell-like cells residing in dental and craniofacial tissues, where they are responsible for maintaining tissue homeostasis and supporting lifelong regeneration. However, as these cells age, they progressively lose their capacity for self-renewal and multilineage differentiation while acquiring genomic instability, mitochondrial dysfunction, chronic inflammatory signaling, and a senescence-associated secretory phenotype (SASP). These changes contribute directly to periodontal degeneration, impaired dentin-pulp regeneration, alveolar bone loss, and delayed oral wound healing.

The Review examines the complex molecular mechanisms underlying OSC aging, including DNA damage accumulation, metabolic dysregulation, epigenetic remodeling, mitochondrial dysfunction, and persistent inflammation. Rather than acting independently, these processes interact to establish a self-reinforcing cycle that progressively impairs stem cell function and compromises the regenerative microenvironment. The authors further propose that oral stem cell aging should be viewed as a dynamic continuum, ranging from potentially reversible functional decline to irreversible regenerative exhaustion, highlighting opportunities for therapeutic intervention before permanent dysfunction occurs.

Beyond elucidating the mechanisms of stem cell aging, the Review summarizes a new generation of rejuvenation strategies aimed at restoring OSC function. These approaches include epigenetic reprogramming, metabolic interventions, senotherapeutics that selectively eliminate or modulate senescent cells, extracellular vesicle-based therapies, and biomaterial-assisted niche engineering. Collectively, these emerging technologies seek not only to rejuvenate aged stem cells themselves but also to reconstruct the surrounding regenerative microenvironment, providing a multifaceted strategy for tissue repair.

The authors also discuss key challenges that remain before these strategies can be translated into clinical practice. Cellular heterogeneity, donor-to-donor variability, age-related alterations in extracellular vesicles, and the need for standardized rejuvenation protocols all present important obstacles to therapeutic development. Addressing these issues will be critical for realizing the full regenerative potential of oral stem cells in aging populations.

Rather than relying on broad anti-aging interventions, the authors envision a future of precision rejuvenation, in which targeted modulation of molecular pathways restores oral stem cell function while preserving tissue-specific identity. By integrating advances in stem cell biology, aging research, and regenerative medicine, this Review provides a conceptual framework for developing next-generation therapies to combat age-related craniofacial degeneration and improve healthy aging.