NDLI: ICOS-Expressing Lymphocytes Promote Resolution of CD8-Mediated Lung Injury in a Mouse Model of Lung Rejection

Content Provider	PubMed Central
Author	Qiang, Wu Gardiner, Gail J. Berry, Elizabeth Wagner, Sarah R. Tiffany, Lu Clay, Bryan S. Moore, Tamson V. Ferreira, Caroline M. Williams, Jesse W. Luster, Andrew D. Medoff, Benjamin D. Cannon, Judy L. Sperling, Anne I. Shilling, Rebecca A.
Editor	Lucienne, Chatenoud
Copyright Year	2013
Abstract	Acute rejection, a common complication of lung transplantation, may promote obliterative bronchiolitis leading to graft failure in lung transplant recipients. During acute rejection episodes, CD8+ T cells can contribute to lung epithelial injury but the mechanisms promoting and controlling CD8-mediated injury in the lung are not well understood. To study the mechanisms regulating CD8+ T cell–mediated lung rejection, we used a transgenic model in which adoptively transferred ovalbumin (OVA)-specific cytotoxic T lymphocytes (CTL) induce lung injury in mice expressing an ovalbumin transgene in the small airway epithelium of the lungs (CC10-OVA mice). The lung pathology is similar to findings in humans with acute lung transplant. In the presence of an intact immune response the inflammation resolves by day 30. Using CC10-OVA.RAG-/- mice, we found that CD4+ T cells and ICOS+/+ T cells were required for protection against lethal lung injury, while neutrophil depletion was not protective. In addition, CD4+Foxp3 + ICOS+ T cells were enriched in the lungs of animals surviving lung injury and ICOS+/+ Tregs promoted survival in animals that received ICOS-/- T cells. Direct comparison of ICOS-/- Tregs to ICOS+/+ Tregs found defects in vitro but no differences in the ability of ICOS-/- Tregs to protect from lethal lung injury. These data suggest that ICOS affects Treg development but is not necessarily required for Treg effector function.
Related Links	http://dx.doi.org/10.1371/journal.pone.0072955
Starting Page	72955
File Format	PDF
ISSN	19326203
e-ISSN	19326203
Journal	PLoS ONE
Issue Number	8
Volume Number	8
Language	English
Publisher	Public Library of Science
Publisher Date	2013-08-01
Access Restriction	Open
Rights Holder	Public Library of Science
Subject Keyword	Biochemistry, Genetics and Molecular Biology(all) Agricultural and Biological Sciences(all) Medicine(all) Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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