Role of bone marrow maturity, insulin-like growth factor 1 receptor, and forkhead box protein N1 in thymic involution and rejuvenation

M. Tasaki, V. Villani, A. Shimizu, M. Sekijima, R. Yamada, I. M. Hanekamp, J. S. Hanekamp, T. A. Cormack, S. G. Moran, A. Kawai, D. H. Sachs, Kazuhiko Yamada

研究成果: Article査読

5 被引用数 (Scopus)

抄録

Thymic involution is associated with age-related changes of the immune system. Utilizing our innovative technique of transplantation of a thymus as an isolated vascularized graft in MHC-inbred miniature swine, we have previously demonstrated that aged thymi are rejuvenated after transplantation into juvenile swine. Here we have studied the role of insulinlike growth factor (IGF) and forkhead-box protein-N1 (FOXN1) as well as bone marrow (BM) in thymic rejuvenation and involution. We examined thymic rejuvenation and involution by means of histology and flow cytometry. Thymic function was assessed by the ability to induce tolerance of allogeneic kidneys. Aged thymi were rejuvenated in a juvenile environment, and successfully induced organ tolerance, while juvenile thymi in aged recipients involuted and had a limited ability to induce tolerance. However, juvenile BM inhibited the involution process of juvenile thymi in aged recipients. An elevated expression of both FOXN1 and IGF1 receptors (IGF-1R) was observed in juvenile thymi and rejuvenated thymi. Juvenile BM plays a role in promoting the local thymic milieu as indicated by its ability to inhibit thymic involution in aged animals. The expression of FOXN1 and IGF-1R was noted to increase under conditions that stimulated rejuvenation, suggesting that these factors are involved in thymic recovery.

本文言語English
ページ(範囲)2877-2891
ページ数15
ジャーナルAmerican Journal of Transplantation
16
10
DOI
出版ステータスPublished - 01-10-2016
外部発表はい

All Science Journal Classification (ASJC) codes

  • 免疫アレルギー学
  • 移植
  • 薬理学(医学)

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