Genetic ablation of Nrf2 enhances susceptibility to cigarette smoke-induced emphysema in mice

Tirumalai Rangasamy, Chung Y. Cho, Rajesh K. Thimmulappa, Lijie Zhen, Sorachai S. Srisuma, Thomas W. Kensler, Masayuki Yamamoto, Irina Petrache, Rubin M. Tuder, Shyam Biswal

Research output: Contribution to journalArticle

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Abstract

Although inflammation and protease/antiprotease imbalance have been postulated to be critical in cigarette smoke-induced (CS-induced) emphysema, oxidative stress has been suspected to play an important role in chronic obstructive pulmonary diseases. Susceptibility of the lung to oxidative injury, such as that originating from inhalation of CS, depends largely on its upregulation of antioxidant systems. Nuclear factor, erythroid-derived 2, like 2 (Nrf2) is a redox-sensitive basic leucine zipper protein transcription factor that is involved in the regulation of many detoxification and antioxidant genes. Disruption of the Nrf2 gene in mice led to earlier-onset and more extensive CS-induced emphysema than was found in wild-type littermates. Emphysema in Nrf2-deficient mice exposed to CS for 6 months was associated with more pronounced bronchoalveolar inflammation; with enhanced alveolar expression of 8-oxo-7,8-dihydro-2′-deoxyguanosine, a marker of oxidative stress; and with an increased number of apoptotic alveolar septal cells - predominantly endothelial and type II epithelial cells - as compared with wild-type mice. Microarray analysis identified the expression of nearly 50 Nrf2-dependent antioxidant and cytoprotective genes in the lung that may work in concert to counteract CS-induced oxidative stress and inflammation. The responsiveness of the Nrf2 pathway may act as a major determinant of susceptibility to tobacco smoke-induced emphysema by upregulating antioxidant defenses and decreasing lung inflammation and alveolar cell apoptosis.

Original languageEnglish (US)
Pages (from-to)1248-1259
Number of pages12
JournalJournal of Clinical Investigation
Volume114
Issue number9
DOIs
StatePublished - Nov 2004
Externally publishedYes

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Emphysema
Smoke
Tobacco Products
Antioxidants
Alveolar Epithelial Cells
Oxidative Stress
Inflammation
Basic-Leucine Zipper Transcription Factors
Genes
Lung
Microarray Analysis
Protease Inhibitors
Chronic Obstructive Pulmonary Disease
Inhalation
Oxidation-Reduction
Tobacco
Pneumonia
Peptide Hydrolases
Up-Regulation
Epithelial Cells

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Rangasamy, T., Cho, C. Y., Thimmulappa, R. K., Zhen, L., Srisuma, S. S., Kensler, T. W., ... Biswal, S. (2004). Genetic ablation of Nrf2 enhances susceptibility to cigarette smoke-induced emphysema in mice. Journal of Clinical Investigation, 114(9), 1248-1259. https://doi.org/10.1172/JCI200421146

Genetic ablation of Nrf2 enhances susceptibility to cigarette smoke-induced emphysema in mice. / Rangasamy, Tirumalai; Cho, Chung Y.; Thimmulappa, Rajesh K.; Zhen, Lijie; Srisuma, Sorachai S.; Kensler, Thomas W.; Yamamoto, Masayuki; Petrache, Irina; Tuder, Rubin M.; Biswal, Shyam.

In: Journal of Clinical Investigation, Vol. 114, No. 9, 11.2004, p. 1248-1259.

Research output: Contribution to journalArticle

Rangasamy, T, Cho, CY, Thimmulappa, RK, Zhen, L, Srisuma, SS, Kensler, TW, Yamamoto, M, Petrache, I, Tuder, RM & Biswal, S 2004, 'Genetic ablation of Nrf2 enhances susceptibility to cigarette smoke-induced emphysema in mice', Journal of Clinical Investigation, vol. 114, no. 9, pp. 1248-1259. https://doi.org/10.1172/JCI200421146
Rangasamy, Tirumalai ; Cho, Chung Y. ; Thimmulappa, Rajesh K. ; Zhen, Lijie ; Srisuma, Sorachai S. ; Kensler, Thomas W. ; Yamamoto, Masayuki ; Petrache, Irina ; Tuder, Rubin M. ; Biswal, Shyam. / Genetic ablation of Nrf2 enhances susceptibility to cigarette smoke-induced emphysema in mice. In: Journal of Clinical Investigation. 2004 ; Vol. 114, No. 9. pp. 1248-1259.
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