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Abstract

Aging Kidney Transplantation

VOLUME 68 - NUMBER 2 / March - April (Review articles)

Carlos G. Musso, Nephrology Division and Ageing Biology Unit, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
María C. Giordani, Nephrology Division, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
Nora Imperiali, Nephrology Division, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina

There are several immunological and non-immunological factors related to renal graft deterioration, and histological lesions such as interstitial fibrosis and tubular atrophy overlap with those observed in aging kidneys. Consequently, it has been proposed that kidney transplant senescence could contribute to graft loss. The process of cell senescence displays characteristics such as an increased expression of specific aging suppressor genes, shortened telomeres, mitochondrial changes, increased expression of negative regulators of the cell cycle, and immunological senescence. Additionally, tubular frailty characterizes the aged kidney, making it more susceptible to ischemia, reperfusion, toxic injury, and consequently, to inflammation. Moreover, renal tissue injury predisposes the older graft not only to progressive deterioration due to glomerular hyperfiltration, but also triggers acute rejection due to increased immunogenicity. In conclusion, renal graft senescence is a complex process, and its better understanding will help the nephrologist in its management in order to achieve a longer graft survival.

Keywords: Aging. Senescence. Kidney. Transplant.

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