scholarly journals The composition of house dust mite is critical for mucosal barrier dysfunction and allergic sensitisation

Thorax ◽  
2011 ◽  
Vol 67 (6) ◽  
pp. 488-495 ◽  
Author(s):  
S Post ◽  
M C Nawijn ◽  
T L Hackett ◽  
M Baranowska ◽  
R Gras ◽  
...  



Allergy ◽  
2013 ◽  
pp. n/a-n/a ◽  
Author(s):  
S. Post ◽  
M. C. Nawijn ◽  
M. R. Jonker ◽  
N. Kliphuis ◽  
M. van den Berge ◽  
...  


2021 ◽  
Vol 25 (8) ◽  
pp. 675-676
Author(s):  
I. Annesi-Maesano ◽  
S. Banerjee ◽  
N. Pham-Thi ◽  
on behalf of the French 6 City Study Group






2017 ◽  
Vol 7 (5) ◽  
pp. 536-541 ◽  
Author(s):  
Nyall R. London ◽  
Anuj Tharakan ◽  
Andrew P. Lane ◽  
Shyam Biswal ◽  
Murugappan Ramanathan


2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Tsutomu Saito ◽  
Tomohiro Ichikawa ◽  
Tadahisa Numakura ◽  
Mitsuhiro Yamada ◽  
Akira Koarai ◽  
...  

An amendment to this paper has been published and can be accessed via the original article.



2020 ◽  
Author(s):  
Tsutomu Saito ◽  
Tomohiro Ichikawa ◽  
Tadahisa Numakura ◽  
Mitsuhiro Yamada ◽  
Akira Koarai ◽  
...  

Abstract Background: The airway epithelial barrier function is disrupted in the airways of asthmatic patients. Abnormal mitochondrial biogenesis is reportedly involved in the pathogenesis of asthma. However, the role of mitochondrial biogenesis in the airway barrier dysfunction has not been elucidated yet. This study aimed to clarify whether the peroxisome proliferator-activated receptor γ coactivator-1alpha (PGC-1α), a central regulator of mitochondrial biogenesis, is involved in the disruption of the airway barrier function induced by aeroallergens. Methods: BEAS-2B cells were exposed to house dust mite (HDM) and the expressions of PGC-1α and E-cadherin, a junctional protein, were examined by immunoblotting. The effect of SRT1720, a PGC-1α activator, was investigated by immunoblotting, immunocytochemistry, and measuring the transepithelial electrical resistance (TEER) on the HDM-induced reduction in mitochondrial biogenesis markers and junctional proteins in airway bronchial epithelial cells. Furthermore,the effects of protease activated receptor 2 (PAR2) inhibitor, GB83, Toll-like receptor 4 (TLR4) inhibitor, lipopolysaccharide from Rhodobacter sphaeroides (LPS-RS), protease inhibitors including E64 and 4-(2-Aminoethyl) benzenesulfonyl fluoride hydrochloride (AEBSF) on the HDM-induced barrier dysfunction were investigated. Results: The amounts of PGC-1α and E-cadherin in the HDM-treated cells were significantly decreased compared to the vehicle-treated cells. SRT1720 restored the expressions of PGC-1α and E-cadherin reduced by HDM in BEAS-2B cells. Treatment with SRT1720 also significantly ameliorated the HDM-induced reduction in TEER. In addition, GB83, LPS-RS, E64 and AEBSF prevented the HDM-induced reduction in the expression of PGC1α and E-cadherin. Conclusions: The current study demonstrated that HDM disrupted the airway barrier function through the PAR2/TLR4/PGC-1α-dependent pathway. The modulation of this pathway could be a new approach for the treatment of asthma.



2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Tsutomu Saito ◽  
Tomohiro Ichikawa ◽  
Tadahisa Numakura ◽  
Mitsuhiro Yamada ◽  
Akira Koarai ◽  
...  

Abstract Background The airway epithelial barrier function is disrupted in the airways of asthmatic patients. Abnormal mitochondrial biogenesis is reportedly involved in the pathogenesis of asthma. However, the role of mitochondrial biogenesis in the airway barrier dysfunction has not been elucidated yet. This study aimed to clarify whether the peroxisome proliferator-activated receptor γ coactivator-1alpha (PGC-1α), a central regulator of mitochondrial biogenesis, is involved in the disruption of the airway barrier function induced by aeroallergens. Methods BEAS-2B cells were exposed to house dust mite (HDM) and the expressions of PGC-1α and E-cadherin, a junctional protein, were examined by immunoblotting. The effect of SRT1720, a PGC-1α activator, was investigated by immunoblotting, immunocytochemistry, and measuring the transepithelial electrical resistance (TEER) on the HDM-induced reduction in mitochondrial biogenesis markers and junctional proteins in airway bronchial epithelial cells. Furthermore,the effects of protease activated receptor 2 (PAR2) inhibitor, GB83, Toll-like receptor 4 (TLR4) inhibitor, lipopolysaccharide from Rhodobacter sphaeroides (LPS-RS), protease inhibitors including E64 and 4-(2-Aminoethyl) benzenesulfonyl fluoride hydrochloride (AEBSF) on the HDM-induced barrier dysfunction were investigated. Results The amounts of PGC-1α and E-cadherin in the HDM-treated cells were significantly decreased compared to the vehicle-treated cells. SRT1720 restored the expressions of PGC-1α and E-cadherin reduced by HDM in BEAS-2B cells. Treatment with SRT1720 also significantly ameliorated the HDM-induced reduction in TEER. In addition, GB83, LPS-RS, E64 and AEBSF prevented the HDM-induced reduction in the expression of PGC1α and E-cadherin. Conclusions The current study demonstrated that HDM disrupted the airway barrier function through the PAR2/TLR4/PGC-1α-dependent pathway. The modulation of this pathway could be a new approach for the treatment of asthma.



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