Cellular senescence limits regenerative capacity and allograft survival
Long-term graft survival after kidney transplantation remains unsatisfactory and unpredictable. Interstitial fibrosis and tubular atrophy are major contributors to late graft loss; features of tubular cell senescence, such as increased p16INK4a expression, associate with these tubulointerstitial cha...
Gespeichert in:
| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2012
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| In: |
Journal of the American Society of Nephrology
Year: 2012, Jahrgang: 23, Heft: 9, Pages: 1467-1473 |
| ISSN: | 1533-3450 |
| DOI: | 10.1681/ASN.2011100967 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1681/ASN.2011100967 Verlag, kostenfrei, Volltext: http://jasn.asnjournals.org/content/23/9/1467 
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| Verfasserangaben: | Heidi Braun, Bernhard M. W. Schmidt, Mirja Raiss, Arpita Baisantry, Dan Mircea-Constantin, Shijun Wang, Marie-Luise Gross, Manuel Serrano, Roland Schmitt, and Anette Melk |
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| 245 | 1 | 0 | |a Cellular senescence limits regenerative capacity and allograft survival |c Heidi Braun, Bernhard M. W. Schmidt, Mirja Raiss, Arpita Baisantry, Dan Mircea-Constantin, Shijun Wang, Marie-Luise Gross, Manuel Serrano, Roland Schmitt, and Anette Melk |
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| 520 | |a Long-term graft survival after kidney transplantation remains unsatisfactory and unpredictable. Interstitial fibrosis and tubular atrophy are major contributors to late graft loss; features of tubular cell senescence, such as increased p16INK4a expression, associate with these tubulointerstitial changes, but it is unknown whether the relationship is causal. Here, loss of the INK4a locus in mice, which allows escape from p16INK4a-dependent senescence, significantly reduced interstitial fibrosis and tubular atrophy and associated with improved renal function, conservation of nephron mass, and transplant survival. Compared with wild-type controls, kidneys from INK4a−/− mice developed significantly less interstitial fibrosis and tubular atrophy after ischemia-reperfusion injury. Consistently, mice that received kidney transplants from INK4a/ARF−/− donors had significantly better survival 21 days after life-supporting kidney transplantation and developed less tubulointerstitial changes. This correlated with higher proliferative rates of tubular cells and significantly fewer senescent cells. Taken together, these data suggest a pathogenic role of renal cellular senescence in the development of interstitial fibrosis and tubular atrophy and kidney graft deterioration by preventing the recovery from injury. Inhibiting premature senescence could have therapeutic benefit in kidney transplantation but has to be balanced against the risks of suspending antitumor defenses. | ||
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