Neutralization of the extracellular HMGB1 released by ischaemic damaged renal cells protects against renal ischaemia-reperfusion injury

doi:10.1093/ndt/gfq466

. 2011 Feb;26(2):469-78.

doi: 10.1093/ndt/gfq466. Epub 2010 Aug 2.

Neutralization of the extracellular HMGB1 released by ischaemic damaged renal cells protects against renal ischaemia-reperfusion injury

Junhua Li¹, Quan Gong, Shan Zhong, Lu Wang, Hui Guo, Ying Xiang, Tomas E Ichim, Cong-Yi Wang, Shi Chen, Feili Gong, Gang Chen

Affiliations

Affiliation

¹ Institute of Organ Transplantation, Tongji Hospital, Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.

PMID: 20679140
DOI: 10.1093/ndt/gfq466

Neutralization of the extracellular HMGB1 released by ischaemic damaged renal cells protects against renal ischaemia-reperfusion injury

Junhua Li et al. Nephrol Dial Transplant. 2011 Feb.

. 2011 Feb;26(2):469-78.

doi: 10.1093/ndt/gfq466. Epub 2010 Aug 2.

Authors

Junhua Li¹, Quan Gong, Shan Zhong, Lu Wang, Hui Guo, Ying Xiang, Tomas E Ichim, Cong-Yi Wang, Shi Chen, Feili Gong, Gang Chen

Affiliation

¹ Institute of Organ Transplantation, Tongji Hospital, Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.

PMID: 20679140
DOI: 10.1093/ndt/gfq466

Abstract

Background: Graft quality, comprised of ischaemia-reperfusion injury (IRI) and surgical manipulation, is one of the major factors influencing transplant rejection. High-mobility group box 1 (HMGB1), a known activator of innate immunity, has been associated with tissue-generated immunological 'danger' signals; however, its role in renal IRI is not clear.

Methods: Renal IRI was induced by clamping the left renal pedicle for 60 min in uninephrectomized BALB/c mice. Rabbit anti-mouse HMGB1 antibody was given intraperitoneally 24 h and 30 min before renal ischaemia. Renal HMGB1 expression was assessed by immunohistochemistry and western blot. The therapeutic effect of HMGB1 neutralizing antibody on IRI was evaluated in terms of renal function, histological and immunopathologic examination and terminal deoxynucleotidyl transferase-mediated uridine triphosphate nick end labelling assays.

Results: Ischaemia alone was associated with release of HMGB1, which after reperfusion appeared to induce localization of HMGB1 to renal tubules, peritubular capillaries and glomeruli where the renal cells might be more susceptible to ischaemic insult. Administration of blocking antibody to HMGB1 was associated with reduction in tubular apoptosis and inflammation (TNF-α expression) in situ and in vivo with preservation of renal function.

Conclusions: These data suggest that released HMGB1 by ischaemic renal parenchyma cells may act as an essential early mediator in delayed inflammatory response during IRI, and targeting HMGB1 may represent a potential approach in the prevention of clinical IRI associated with kidney transplantation.

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Neutralization of the extracellular HMGB1 released by ischaemic damaged renal cells protects against renal ischaemia-reperfusion injury

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Neutralization of the extracellular HMGB1 released by ischaemic damaged renal cells protects against renal ischaemia-reperfusion injury

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