Transfer of Aging: Implications for Pediatric Solid Organ Transplantation

Area of Science:

• Transplantation immunology
• Gerontology
• Pediatric medicine

Background:

• Solid organ transplantation (SOT) is crucial for pediatric end-stage organ failure.
• Limited pediatric donor organs lead to increased use of older, age-mismatched donor organs.
• Older donor organs carry risks of heightened immunogenicity, rejection, and poorer long-term outcomes.

Purpose of the Study:

• To review the role of cellular senescence in pediatric organ transplantation.
• To discuss the potential transfer of senescence from aged donor organs to pediatric recipients.
• To explore strategies for mitigating the impact of senescence in pediatric transplant recipients.

Main Methods:

• Review of emerging evidence on cellular senescence in aged donor organs.
• Analysis of animal models demonstrating senescence transfer and its effects.
• Discussion of potential therapeutic interventions targeting senescence.

Main Results:

• Aged donor organs may transfer senescence, accelerating aging-like processes (frailty, cognitive decline, organ dysfunction) in pediatric recipients.
• Senescence induction could exacerbate pediatric conditions like chronic kidney disease and juvenile idiopathic arthritis.
• Animal studies confirm that older donor organs induce immune dysfunction and impairments in young recipients.

Conclusions:

• Cellular senescence is a significant factor in pediatric organ transplantation outcomes.
• Senolytic therapies represent a promising strategy to improve outcomes for pediatric recipients of aged donor organs.
• Further human studies are essential to validate findings and guide clinical practice, balancing donor pool expansion with age-matched transplantation.