Defective epithelial barrier in chronic rhinosinusitis: The regulation of tight junctions by IFN-γ and IL-4 Michael B. Soyka, MD, Paulina Wawrzyniak,

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Presentation transcript:

Defective epithelial barrier in chronic rhinosinusitis: The regulation of tight junctions by IFN-γ and IL-4 Michael B. Soyka, MD, Paulina Wawrzyniak, MSc, Thomas Eiwegger, MD, David Holzmann, MD, Angela Treis, MSc, Kerstin Wanke, MSc, Jeannette I. Kast, BSc, Cezmi A. Akdis, MD Journal of Allergy and Clinical Immunology Volume 130, Issue 5, Pages 1087-1096.e10 (November 2012) DOI: 10.1016/j.jaci.2012.05.052 Copyright © 2012 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig 1 TJ integrity and barrier function is disturbed in patients with CRSwNP: A and B, Trans-tissue resistance (TTR) measured with an Ussing chamber in biopsy specimens (Fig 1, A) and TER measured in ALI cultures from control subjects and patients with CRS (Fig 1, B; mean ± SEM). C and D, Immunohistochemistry for occludin and ZO-1 in biopsy specimens (Fig 1, C) and ALI cultures (Fig 1, D) from control subjects and patients with CRS. Fig 1, A and C, Same effects for at least 4 biopsy specimens in each group. Fig 1, B and D, control subjects, n = 9; patients with CRSwNP, n = 6; and patients with CRSsNP, n = 5 cultures. DAPI, 4′-6-Diamidino-2-phenylindole dihydrochloride. ∗P ≤ .05. Journal of Allergy and Clinical Immunology 2012 130, 1087-1096.e10DOI: (10.1016/j.jaci.2012.05.052) Copyright © 2012 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig 2 Low expression of TJ mRNA and proteins in patients with CRSwNP: A, mRNA expression for claudin-1, claudin-4, occludin, ZO-1, and ZO-2 in biopsy specimens reveals a significantly higher expression of claudin-4 and occludin in control subjects than in patients with CRS (control subjects, n = 17; patients with CRSwNP, n = 14; patients with CRSsNP, n = 15). B, Western blot showing a specific occludin band or cleaved occludin in all control biopsy specimens and in 1 patient with CRSsNP, whereas it is not detectable in patients with CRSwNP (n = 4 per group). GAPDH, Glyceraldehyde-3-phosphate dehydrogenase. ∗P ≤ .05. Journal of Allergy and Clinical Immunology 2012 130, 1087-1096.e10DOI: (10.1016/j.jaci.2012.05.052) Copyright © 2012 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig 3 TJ mRNA expression is increased in ALI cultures of patients with CRSwNP: A, Relative mRNA expression for claudin-1, claudin-4, occludin, ZO-1, and ZO-2 in ALI cultures shows higher levels in patients with CRSwNP compared with that seen in control subjects, with a significant difference for claudin-4 (control subjects, n = 6; patients with CRSwNP, n = 4; and patients with CRSsNP, n = 3). B, Cell proliferation was measured based on Ki67 mRNA expression in a subgroup of ALI cultures (control subjects, n = 5; patients with CRS, n = 4). EF1α, Elongation factor 1α. ∗P ≤ .05. Journal of Allergy and Clinical Immunology 2012 130, 1087-1096.e10DOI: (10.1016/j.jaci.2012.05.052) Copyright © 2012 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig 4 Proinflammatory cytokines regulate TER in ALI cultures: A, Relative TER in ALI cultures during 48 hours after stimulation compared with the starting point. Significantly decreased TER by IFN-γ and IL-4 but not by IL-17 was shown. B, Immunofluorescence staining for occludin and ZO-1 in stimulated ALI cultures. IFN-γ leads to epithelial stratification (white arrows). The IL-4–stimulated culture shows disruption of the TJ stands. DAPI, 4′-6-Diamidino-2-phenylindole dihydrochloride. C, TER negatively correlates with FITC-dextran permeability in ALI cultures (12 and 24 hours' incubation of FITC-dextran). ∗P ≤ .05. Journal of Allergy and Clinical Immunology 2012 130, 1087-1096.e10DOI: (10.1016/j.jaci.2012.05.052) Copyright © 2012 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig 5 IFN-γ upregulates claudin-4 and ZO-2 mRNA expression in ALI cultures: A, Relative mRNA expression of claudin-1, claudin-4, occludin, ZO-1, and ZO-2 compared with that seen in nonstimulated (NS) ALI cultures. IFN-γ leading to a significant upregulation of claudin-4 and ZO-2 mRNAs is shown (n = 11). B, Divided according to the disease, no changes in TJ mRNA expression for IL-4– and IL-17–stimulated ALI cultures were found. IFN-γ–stimulated ALI cultures from patients with CRSwNP seem to have higher TJ mRNA expression than those of control subjects. ∗P ≤ .05, ∗∗P ≤ .01. Journal of Allergy and Clinical Immunology 2012 130, 1087-1096.e10DOI: (10.1016/j.jaci.2012.05.052) Copyright © 2012 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig E1 Cell purity of HSECs was confirmed by using cytokeratin and vimentin costaining: HSEC monolayer staining for vimentin and cytokeratin was performed for all isolated epithelial cell lines. Purity was found to be greater than 95% in all HSEC cell lines based on cytokeratin positivity and the absence of vimentin. Isotype and positive controls for vimentin with human bronchial smooth muscle cells are provided. DAPI, 4′-6-Diamidino-2-phenylindole dihydrochloride. Journal of Allergy and Clinical Immunology 2012 130, 1087-1096.e10DOI: (10.1016/j.jaci.2012.05.052) Copyright © 2012 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig E2 ALI cultures from healthy control subjects and patients with CRSwNP show the same thickness and are able to develop cilia: ALI cultures were embedded in paraffin and cut perpendicularly into 10-μm sections on a microtome. Hematoxylin and eosin staining of ALI culture cross-sections shows the same height for cultures from patients with CRSwNP and healthy control subjects, confirming the similar assembly of cells in both cultures. Ciliation is detectable on some parts of the ALI cultures. Journal of Allergy and Clinical Immunology 2012 130, 1087-1096.e10DOI: (10.1016/j.jaci.2012.05.052) Copyright © 2012 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig E3 TJ expression is altered in biopsy specimens from patients with CRS: Immunohistochemistry for the TJ protein occludin and the associated protein ZO-1 in biopsy specimens from healthy control subjects and patients with CRS from Fig 1, B, is shown. Single-color staining for occludin and ZO-1, including isotype controls and hematoxylin and eosin (HE) staining, is provided. In the control biopsy specimen both occludin and ZO-1 are regularly expressed and show a tight pattern. In both CRS samples, the expression is disrupted and less intense for occludin, especially in patients with CRSwNP. The results represent the faulty TJ arrangement in patients with CRS, indicating leaky epithelium. Hematoxylin and eosin staining shows a preserved epithelium in all samples. DAPI, 4′-6-Diamidino-2-phenylindole dihydrochloride. Journal of Allergy and Clinical Immunology 2012 130, 1087-1096.e10DOI: (10.1016/j.jaci.2012.05.052) Copyright © 2012 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig E4 Specific mRNA expression pattern in biopsy specimens from patients with CRS of TJs, desmosomes, adherens, and gap junctions, as well as associated proteins: Microfluidic card PCR was performed in biopsy specimens from patients with CRS for a total of 62 TJs and related genes. A, Different expression patterns for TJ mRNA. B, Desmosomal, adherens, and gap junctional mRNA expression. C, Associated protein gene expression. The differences between disease subtypes were quantified by using RT-PCR for a selection of genes and are shown in the main text. Control subjects, n = 4; patients with CRSwNP, n = 3; and patients with CRSsNP, n = 3. Journal of Allergy and Clinical Immunology 2012 130, 1087-1096.e10DOI: (10.1016/j.jaci.2012.05.052) Copyright © 2012 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig E5 TJ mRNA expression tends to be decreased in patients with CRS compared with that seen in healthy control subjects in epithelial scrapings/curettage: mRNA analysis by using real-time PCR of epithelial scrapings/curettage of patients with CRS and control subjects shows a trend toward lower expression levels of claudin-1, claudin-4, occludin, and ZO-2 in patients with CRS compared with those seen in control subjects. Because of the low number of samples of epithelium only, statistical significance could not be reached. In analogy to the results from Fig 2, A, this indicates that TJ mRNA expression shows the same results in full-thickness biopsy specimens and samples of epithelial only. Therefore it is not the subepithelial TJ-carrying cells that influence our measurements. Healthy control subjects, n = 5; patients with CRS, n = 3. Journal of Allergy and Clinical Immunology 2012 130, 1087-1096.e10DOI: (10.1016/j.jaci.2012.05.052) Copyright © 2012 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig E6 ECP and IFN-γ mRNAs negatively correlate with TJ mRNA in biopsy specimens: ECP shows a significant negative correlation with expression of measured TJ mRNAs, and IFN-γ demonstrates a trend-wise negative connection with TJ mRNA expression in whole-tissue biopsy specimens. Therefore the level of inflammation negatively correlates with TJ expression on mRNA level. N = 15; control subjects, n = 6; patients with CRSwNP, n = 5; and patients with CRSsNP, n = 4. Journal of Allergy and Clinical Immunology 2012 130, 1087-1096.e10DOI: (10.1016/j.jaci.2012.05.052) Copyright © 2012 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig E7 Proinflammatory cytokines influence the tightness of ALI cultures: The TER data from Fig 4, A, were analyzed according to the disease type of the originating cell line used in the ALI cultures after 48 hours of stimulation with either IFN-γ, IL-4, or IL-17. TER is indicated as a percentage of the nonstimulated ALI cultures. Again, decrease in TER by IFN-γ and IL-4 is seen without any relevant differences among the 3 groups. In IL-17 the cultures from patients with CRSwNP exerted the highest TER. Therefore the obtained results are not disease specific and can be induced in any sinonasal epithelial cell culture. Control subjects, n = 4; patients with CRSwNP, n = 2; and patients with CRSsNP, n = 2. Journal of Allergy and Clinical Immunology 2012 130, 1087-1096.e10DOI: (10.1016/j.jaci.2012.05.052) Copyright © 2012 American Academy of Allergy, Asthma & Immunology Terms and Conditions