help button home button
AJRCCM
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Published ahead of print on January 25, 2007, doi:10.1164/rccm.200509-1527OC
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow All Versions of this Article:
200509-1527OCv1
175/8/829    most recent
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Cho, H.-Y.
Right arrow Articles by Kleeberger, S. R.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Cho, H.-Y.
Right arrow Articles by Kleeberger, S. R.
American Journal of Respiratory and Critical Care Medicine Vol 175. pp. 829-839, (2007)
© 2007 American Thoracic Society
doi: 10.1164/rccm.200509-1527OC

Original Article

Signal Transduction Pathways of Tumor Necrosis Factor–mediated Lung Injury Induced by Ozone in Mice

Hye-Youn Cho1, Daniel L. Morgan2, Alison K. Bauer1,* and Steven R. Kleeberger1

1 Laboratory of Respiratory Biology, 2 Laboratory of Molecular Toxicology, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina

Correspondence and requests for reprints should be addressed to Hye-Youn Cho, Ph.D., Laboratory of Respiratory Biology, National Institute of Environmental Health Sciences, National Institutes of Health, 111 TW Alexander Drive, Building 101, MD D-201, Research Triangle Park, NC 27709. E-mail: cho2{at}niehs.nih.gov

Rationale: Increasing evidence suggests that tumor necrosis factor (TNF)-{alpha} plays a key role in pulmonary injury caused by environmental ozone (O3) in animal models and human subjects. We previously determined that mice genetically deficient in TNF response are protected from lung inflammation and epithelial injury after O3 exposure.

Objectives: The present study was designed to determine the molecular mechanisms of TNF receptor (TNF-R)–mediated lung injury induced by O3.

Methods: TNF-R knockout (Tnfr–/–) and wild-type (Tnfr+/+) mice were exposed to 0.3 ppm O3 or air (for 6, 24, or 48 h), and lung RNA and proteins were prepared. Mice deficient in p50 nuclear factor (NF)-{kappa}B (Nfkb1–/–) or c-Jun–NH2 terminal kinase 1 (Jnk1–/–) and wild-type controls (Nfkb1+/+, Jnk1+/+) were exposed to O3 (48 h), and the role of NF-{kappa}B and mitogen-activated protein kinase (MAPK) as downstream effectors of lung injury was analyzed by bronchoalveolar lavage analyses.

Results: O3-induced early activation of TNF-R adaptor complex formation was attenuated in Tnfr–/– mice compared with Tnfr+/+ mice. O3 significantly activated lung NF-{kappa}B in Tnfr+/+ mice before the development of lung injury. Basal and O3-induced NF-{kappa}B activity was suppressed in Tnfr–/– mice. Compared with Tnfr+/+ mice, MAPKs and activator protein (AP)-1 were lower in Tnfr–/– mice basally and after O3. Furthermore, inflammatory cytokines, including macrophage inflammatory protein-2, were differentially expressed in Tnfr–/– and Tnfr+/+ mice after O3. O3-induced lung injury was significantly reduced in Nfkb1–/– and Jnk1–/– mice relative to respective control animals.

Conclusions: Results suggest that NF-{kappa}B and MAPK/AP-1 signaling pathways are essential in TNF-R–mediated pulmonary toxicity induced by O3.

Key Words: tumor necrosis factor receptor • knockout • nuclear factor-{kappa}B • mitogen-activated protein kinase • activator protein-1


AT A GLANCE COMMENTARY

Scientific Knowledge on the Subject
Nuclear factor-{kappa}B and MAPK/AP-1 signaling pathways are essential in tumor necrosis factor receptor–mediated pulmonary toxicity induced by ozone.

What This Study Adds to the Field
NF-{kappa}B and MAPK/AP-1 signaling pathways are essential in TNF receptor–mediated lung injury induced by ozone.

 



This article has been cited by other articles:


Home page
 Am. J. Respir. Crit. Care Med.Home page
S.-B. Hong, Y. Huang, L. Moreno-Vinasco, S. Sammani, J. Moitra, J. W. Barnard, S.-F. Ma, T. Mirzapoiazova, C. Evenoski, R. R. Reeves, et al.
Essential Role of Pre-B-Cell Colony Enhancing Factor in Ventilator-induced Lung Injury
Am. J. Respir. Crit. Care Med., September 15, 2008; 178(6): 605 - 617.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Respir. Cell Mol. Bio.Home page
C. B. Manning, T. Sabo-Attwood, R. F. Robledo, M. B. MacPherson, M. Rincon, P. Vacek, D. Hemenway, D. J. Taatjes, P. J. Lee, and B. T. Mossman
Targeting the MEK1 Cascade in Lung Epithelium Inhibits Proliferation and Fibrogenesis by Asbestos
Am. J. Respir. Cell Mol. Biol., May 1, 2008; 38(5): 618 - 626.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Respir. Crit. Care Med.Home page
T. S. Nawrot, E. Alfaro-Moreno, and B. Nemery
Update in Occupational and Environmental Respiratory Disease 2007
Am. J. Respir. Crit. Care Med., April 1, 2008; 177(7): 696 - 700.
[Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Proc. Am. Thorac. Soc. Am. J. Respir. Cell Mol. Biol.
Copyright © 2007 American Thoracic Society 		  ATS State of the Art Course 2008