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Title: Accelerated telomere reduction and hepatocyte senescence in tolerated human liver allografts.
Authors: Aini, Wulamujiang
Miyagawa-Hayashino, Aya
Ozeki, Munetaka  kyouindb  KAKEN_id
Adeeb, Salah
Hirata, Masahiro
Tamaki, Keiji  kyouindb  KAKEN_id
Uemoto, Shinji
Haga, Hironori  kyouindb  KAKEN_id
Author's alias: 宮川, 文
Keywords: Tolerance
Liver transplantation
Real-time PCR
Cyclin-dependent kinase inhibitor p21
Hepatocyte nuclear area
Issue Date: Aug-2014
Publisher: Elsevier B.V.
Journal title: Transplant immunology
Volume: 31
Issue: 2
Start page: 55
End page: 59
Abstract: [Background]In living donor liver transplantation, the biological organ age of the donated allograft is unknown in young patients who receive grafts from older donors. Few studies have focused on the effects of aging on allografts in the state of tolerance. The purpose of this study was to assess the biological organ age of liver grafts.[Methods]In 20 tolerated allografts over a 10-year post-transplant follow-up period, the relative telomere lengths were measured by multiplex quantitative polymerase chain reaction, and hepatocyte nuclear size and cell cycle phase markers were determined by immunohistochemistry. The results were compared with the same measurements that had been obtained prior to transplantation in the recipients' pre-implantation donor livers. Tolerance was defined strictly as a condition in which the allograft functioned normally and showed normal histology without any histological signs of rejection, fibrosis or inflammation in the absence of immunosuppression. [Results]First, telomere length correlated with chronological donor age (n = 41). Accelerated telomere reduction was seen in tolerated grafts compared with the predicted telomere length of each allograft calculated from the regression line of donor livers. Tolerated grafts were associated with higher hepatocyte p21 expression and greater nuclear area than in the donor livers prior to transplantation. [Conclusions]These findings suggest that allografts age more rapidly than in the normal population, and that grafts may reach the limit of proliferative capacity even in the state of tolerance.
Description: This work was supported by a Grant-in-Aid from the Japan Society for the Promotion of Science (23590424) to AM-H.
Rights: © 2014 Elsevier B.V.
この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。This is not the published version. Please cite only the published version.
DOI(Published Version): 10.1016/j.trim.2014.06.008
PubMed ID: 24993398
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