» Articles » PMID: 21605660

Vitamin E Prevents NRF2 Suppression by Allergens in Asthmatic Alveolar Macrophages in Vivo

Overview
Date 2011 May 25
PMID 21605660
Citations 24
Authors
Affiliations
Soon will be listed here.
Abstract

Asthma is a chronic inflammatory airway disease associated with increased generation of reactive oxidant species and disturbed antioxidant defenses. NRF2 is the master transcription factor that regulates the expression of Phase II antioxidant and detoxifying enzymes. Disruption of NRF2 augments oxidative stress and inflammation in a mouse model of asthma, suggesting a protective role for NRF2 in the lungs in vivo. Yet, little is known about the regulation and function of NRF2 in human asthmatics. Using segmental allergen challenge, a well-established experimental model of IgE-mediated asthma exacerbation in human atopic asthmatics, we investigated the effects of a specific allergen and the modulatory role of vitamin E on NRF2 and a NRF2-target gene, superoxide dismutase, in alveolar macrophages recovered from the airways at 24h after allergen instillation in vivo. Allergen-provoked airway inflammation in sensitive asthmatics caused a profound inhibition of macrophage NRF2 activity and superoxide dismutase, rendering them incapable of responding to the NRF2 inducers. Prolonged treatment with high doses of the antioxidant vitamin E lessened this allergen-induced drop in alveolar macrophage NRF2. These results are the first to demonstrate that NRF2 expression in human asthmatics is compromised upon allergen challenge but can be rescued by vitamin E in vivo.

Citing Articles

Dietary supplementations to mitigate the cardiopulmonary effects of air pollution toxicity: A systematic review of clinical trials.

Ilaghi M, Kafi F, Shafiei M, Zangiabadian M, Nasiri M PLoS One. 2024; 19(6):e0304402.

PMID: 38870164 PMC: 11175466. DOI: 10.1371/journal.pone.0304402.


Macrophages Orchestrate Airway Inflammation, Remodeling, and Resolution in Asthma.

Britt Jr R, Ruwanpathirana A, Ford M, Lewis B Int J Mol Sci. 2023; 24(13).

PMID: 37445635 PMC: 10341920. DOI: 10.3390/ijms241310451.


Protective effects of inhaled antioxidants against air pollution-induced pathological responses.

Schichlein K, Smith G, Jaspers I Respir Res. 2023; 24(1):187.

PMID: 37443038 PMC: 10339523. DOI: 10.1186/s12931-023-02490-7.


The Role of Vitamins in the Pathogenesis of Asthma.

Zajac D, Wojciechowski P Int J Mol Sci. 2023; 24(10).

PMID: 37239921 PMC: 10218465. DOI: 10.3390/ijms24108574.


Clinically proven natural products, vitamins and mineral in boosting up immunity: A comprehensive review.

Al Mahmud A, Siddiqui S, Karim M, Al-Mamun M, Akhter S, Sohel M Heliyon. 2023; 9(4):e15292.

PMID: 37089292 PMC: 10079597. DOI: 10.1016/j.heliyon.2023.e15292.


References
1.
Devereux G, Turner S, Craig L, McNeill G, Martindale S, Harbour P . Low maternal vitamin E intake during pregnancy is associated with asthma in 5-year-old children. Am J Respir Crit Care Med. 2006; 174(5):499-507. DOI: 10.1164/rccm.200512-1946OC. View

2.
Eder W, Ege M, von Mutius E . The asthma epidemic. N Engl J Med. 2006; 355(21):2226-35. DOI: 10.1056/NEJMra054308. View

3.
Bernstein I, Storms W . Practice parameters for allergy diagnostic testing. Joint Task Force on Practice Parameters for the Diagnosis and Treatment of Asthma. The American Academy of Allergy, Asthma and Immunology and the American College of Allergy, Asthma and Immunology. Ann Allergy Asthma Immunol. 1995; 75(6 Pt 2):543-625. View

4.
Zhu H, Jia Z, Zhang L, Yamamoto M, Misra H, Trush M . Antioxidants and phase 2 enzymes in macrophages: regulation by Nrf2 signaling and protection against oxidative and electrophilic stress. Exp Biol Med (Maywood). 2008; 233(4):463-74. DOI: 10.3181/0711-RM-304. View

5.
Wood L, Gibson P . Reduced circulating antioxidant defences are associated with airway hyper-responsiveness, poor control and severe disease pattern in asthma. Br J Nutr. 2009; 103(5):735-41. DOI: 10.1017/S0007114509992376. View