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Mediators of Inflammation
Volume 2014, Article ID 195290, 10 pages
http://dx.doi.org/10.1155/2014/195290
Research Article

Blockade of ICAM-1 Improves the Outcome of Polymicrobial Sepsis via Modulating Neutrophil Migration and Reversing Immunosuppression

1Department of Anesthesiology and Intensive Care, Changhai Hospital, Second Military Medical University, 168 Changhai Road, Shanghai 200433, China
2Department of Anesthesiology and Intensive Care, Shanghai Ninth People’s Hospital, Shanghai Jiaotong University, 639 Zhizaoju Road, Shanghai 200011, China

Received 10 January 2014; Revised 13 April 2014; Accepted 14 April 2014; Published 6 May 2014

Academic Editor: Martin Hoenigl

Copyright © 2014 Yan-jun Zhao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Intercellular adhesion molecule-1 (ICAM-1) is a key adhesion molecule mediating neutrophil migration and infiltration during sepsis. But its role in the outcome of sepsis remains contradictory. The current study was performed to investigate the role of anti-ICAM-1 antibody in the outcome of polymicrobial sepsis and sepsis-induced immune disturbance. Effect of anti-ICAM-1 antibody on outcome of sepsis induced by cecal ligation and puncture (CLP) was evaluated by the survival analysis, bacterial clearance, and lung injury. Its influence on neutrophil migration and infiltration, as well as lymphocyte status, in thymus and spleen was also investigated. The results demonstrated that ICAM-1 mRNA was upregulated in lung, thymus, and spleen of CLP mice. Anti-ICAM-1 antibody improved survival and bacterial clearance in CLP mice and attenuated lung injury. Migration of neutrophils to peritoneal cavity was enhanced while their infiltration into lung, thymus, and spleen was hampered by ICAM-1 blockade. Anti-ICAM-1 antibody also prevented sepsis-induced apoptosis in thymus and spleen. Positive costimulatory molecules including CD28, CD80, and CD86 were upregulated, while negative costimulatory molecules including PD-1 and PD-L1 were downregulated following anti-ICAM-1 antibody administration. In conclusion, ICAM-1 blockade may improve outcome of sepsis. The rationale may include the modulated neutrophil migration and the reversed immunosuppression.