Environmental changes could enhance the biological effect of Hop J pollens on human airway epithelial cells Seung Ihm Lee, PhD, Le Duy Pham, MD, Yoo.

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Environmental changes could enhance the biological effect of Hop J pollens on human airway epithelial cells Seung Ihm Lee, PhD, Le Duy Pham, MD, Yoo Seob Shin, MD, PhD, Dong Hyeon Suh, BS, Hae-Sim Park, MD, PhD Journal of Allergy and Clinical Immunology Volume 134, Issue 2, Pages 470-472.e1 (August 2014) DOI: 10.1016/j.jaci.2014.01.034 Copyright © 2014 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig 1 Effects of Hop J pollen extracts on transepithelial permeability and occludin degradation in airway epithelial cells. A, Transepithelial permeability of Calu-3 cells induced by the 2 pollen extracts. Data are shown as mean ± SEM. **P < .01; ***P < .001 vs control. B, The disruption of tight junctions induced by the 2 pollen extracts visualized under a fluorescent microscope. C, Occludin degradations induced by Hop J pollen extracts. D, Integrity of occludin was visualized by immunocytochemistry. The arrows indicate examples of occludin degradation. Controls were conducted using serum-free media. DAPI, 4′-6-Diamidino-2-phenylindole, dihydrochloride; 98, the 98 extracts; 09, the 09 extracts. Journal of Allergy and Clinical Immunology 2014 134, 470-472.e1DOI: (10.1016/j.jaci.2014.01.034) Copyright © 2014 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig 2 Hop J pollen extracts induced occludin degradation and upregluated PAR2 and TSLP expressions via ROS production. A, ROS production induced by the 98 and 09 extracts. Data are showed as mean ± SEM. *P < .05; **P < .01 vs control. B, NAC inhibited pollen-induced ROS productions. C, Expressions of PAR2 and TSLP upregulated by Hop J pollen extracts. D, NAC treatment inhibited the degradation of occludin as well as the upregulated expressions of PAR2 and TSLP induced by Hop J pollen extracts. Controls were conducted using serum-free media. 98, The 98 extracts; 09, the 09 extracts. Journal of Allergy and Clinical Immunology 2014 134, 470-472.e1DOI: (10.1016/j.jaci.2014.01.034) Copyright © 2014 American Academy of Allergy, Asthma & Immunology Terms and Conditions