Abstract
Protease(s) enhances airway inflammation and allergic cascade. In the present study, effect of a serine protease inhibitor was evaluated in mouse model of airway disease. Mice were sensitized with cockroach extract (CE) or Per a 10 and treated with 4-(2-aminoethyl) benzenesulfonyl fluoride hydrochloride (AEBSF) 1 h before or after challenge to measure airway response. Mice were euthanized to collect bronchoalveolar lavage fluid (BALF), blood, and lung to evaluate inflammation. AEBSF treatment significantly reduced the AHR in allergen-challenged mice in dose-dependent manner (p ≤ 0.01). IgE (p ≤ 0.05) and Th2 cytokines (p ≤ 0.05) were significantly reduced in treated mice. AEBSF treatment lowered total cell (p ≤ 0.05), eosinophil (p ≤ 0.05), and neutrophil (p ≤ 0.05) in BALF and lung tissue. Oxidative stress parameters were impaired on treatment in allergen-challenged mice (p ≤ 0.05). AEBSF had therapeutic effect in allergen-induced airway resistance and underling inflammation and had potential for combination or as add-on therapy for respiratory diseases.
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Abbreviations
- AEBSF :
-
4-(2-Aminoethyl) benzenesulfonyl fluoride hydrochloride
- BAL :
-
Bronchoalveolar lavage
- BALF :
-
Bronchoalveolar lavage fluid
- CE :
-
Cockroach extract
- DCFH-DA :
-
2′,7′-Dichlorfluorescein-diacetate
- MCh :
-
Methacholine
- MFI :
-
Mean fluorescence intensity
- PEEP :
-
Positive end expiratory pressure
- ROS :
-
Reactive oxygen species
- RT :
-
Room temperature
- SEM :
-
Standard error mean
- TMB :
-
3,3′,5,5′-Tetramethylbenzidine
- OPD :
-
o-Phenylenediamin
- PAS :
-
Periodic acid–Schiff
- HRP :
-
Horseradish peroxidase
- NADPH :
-
Nicotinamide adeninedinucleotide phosphate ELISAEnzyme-linked immunosorbent assay
- Ns :
-
Not significant
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Acknowledgments
One of the authors (Sanjay Saw) is a “Junior Research Fellow” from University Grant Commission, Delhi. The authors are thankful to CSIR-network project for financial support to this study.
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The authors have no competing interests.
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Saw, S., Arora, N. Protease Inhibitor Reduces Airway Response and Underlying Inflammation in Cockroach Allergen-Induced Murine Model. Inflammation 38, 672–682 (2015). https://doi.org/10.1007/s10753-014-9976-0
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DOI: https://doi.org/10.1007/s10753-014-9976-0