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Nguyen TN, Koga Y, Wakasugi T, Kitamura T, Suzuki H. Nasal polyps show decreased mucociliary transport despite vigorous ciliary beating. Braz J Otorhinolaryngol 2024; 90:101377. [PMID: 38232516 PMCID: PMC10827508 DOI: 10.1016/j.bjorl.2023.101377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 11/21/2023] [Accepted: 12/04/2023] [Indexed: 01/19/2024] Open
Abstract
OBJECTIVE Mucociliary transport function in the airway mucosa is essential for maintaining a clean mucosal surface. This function is impaired in upper and lower airway diseases. Nasal polyps are a noticeable pathological feature that develop in some of the patients with chronic rhinosinusitis. Like ordinary nasal mucosae, nasal polyps have a ciliated pseudostratified epithelium with vigorous ciliary beating. We measured ex vivo Mucociliary Transport Velocity (MCTV) and Ciliary Beat Frequency (CBF) and explored the expressions of Planar Cell Polarity (PCP) proteins in nasal polyps in comparison with turbinate mucosae. METHODS Inferior turbinates and nasal polyps were surgically collected from patients with chronic rhinosinusitis. Ex vivo MCTV and CBF were measured using a high-speed digital imaging system. Expressions of PCP proteins were explored by fluorescence immunohistochemistry and quantitative RT-PCR. RESULTS The MCTV of nasal polyps was significantly lower than that of the turbinates (7.43 ± 2.01 vs. 14.56 ± 2.09 μm/s; p = 0.0361), whereas CBF did not differ between the two tissues. The MCTV vector was pointed to the posteroinferior direction in all turbinates with an average inclination angle of 41.0 degrees. Immunohistochemical expressions of Dishevelled-1, Dishevelled-3, Frizzled3, Frizzled6, Prickle2 and Vangl2 were lower in the nasal polyps than in the turbinates. Confocal laser scanning microscopy showed that Frizzled3 was localized along the cell junction on the apical surface. The expression levels of mRNAs for Dishevelled-1, Dishevelled-3 and Frizzled3 in the nasal polyps were also decreased in comparison with the turbinates. CONCLUSION These results indicate that muco ciliary transport in nasal polyps is impaired although vigorous ciliary beating is maintained, and that the impairment may be caused by a decrease in Dishevelled/Frizzled proteins and resultant PCP disarrangement. LEVEL OF EVIDENCE Level 3.
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Affiliation(s)
- Thi Nga Nguyen
- University of Occupational and Environmental Health, School of Medicine, Department of Otorhinolaryngology-Head and Neck Surgery, Kitakyushu, Japan; Vinh Medical University, Faculty of Public Health, Vinh City, Vietnam
| | - Yuma Koga
- University of Occupational and Environmental Health, School of Medicine, Department of Otorhinolaryngology-Head and Neck Surgery, Kitakyushu, Japan
| | - Tetsuro Wakasugi
- University of Occupational and Environmental Health, School of Medicine, Department of Otorhinolaryngology-Head and Neck Surgery, Kitakyushu, Japan
| | - Takuro Kitamura
- University of Occupational and Environmental Health, School of Medicine, Department of Otorhinolaryngology-Head and Neck Surgery, Kitakyushu, Japan
| | - Hideaki Suzuki
- University of Occupational and Environmental Health, School of Medicine, Department of Otorhinolaryngology-Head and Neck Surgery, Kitakyushu, Japan.
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Hollenhorst MI, Husnik T, Zylka M, Duda N, Flockerzi V, Tschernig T, Maxeiner S, Krasteva-Christ G. Human airway tuft cells influence the mucociliary clearance through cholinergic signalling. Respir Res 2023; 24:267. [PMID: 37925434 PMCID: PMC10625704 DOI: 10.1186/s12931-023-02570-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 10/20/2023] [Indexed: 11/06/2023] Open
Abstract
BACKGROUND Airway tuft cells, formerly called brush cells have long been described only morphologically in human airways. More recent RNAseq studies described a chemosensory cell population, which includes tuft cells, by a distinct gene transcription signature. Yet, until which level in the tracheobronchial tree in native human airway epithelium tuft cells occur and if they function as regulators of innate immunity, e.g., by regulating mucociliary clearance, remained largely elusive. METHODS We performed immunohistochemistry, RT-PCR and immunoblotting analyses for various tuft cell markers to confirm the presence of this cell type in human tracheal samples. Immunohistochemistry was conducted to study the distribution of tuft cells along the intrapulmonary airways in humans. We assessed the influence of bitter substances and the taste transduction pathway on mucociliary clearance in mouse and human tracheal samples by measuring particle transport speed. RESULTS Tuft cells identified by the expression of their well-established marker POU class 2 homeobox 3 (POU2F3) were present from the trachea to the bronchioles. We identified choline acetyltransferase in POU2F3 expressing cells as well as the transient receptor potential melastatin 5 (TRPM5) channel in a small population of tracheal epithelial cells with morphological appearance of tuft cells. Application of bitter substances, such as denatonium, led to an increase in mucociliary clearance in human tracheal preparations. This was dependent on activation of the TRPM5 channel and involved cholinergic and nitric oxide signalling, indicating a functional role for human tuft cells in the regulation of mucociliary clearance. CONCLUSIONS We were able to detect tuft cells in the tracheobronchial tree down to the level of the bronchioles. Moreover, taste transduction and cholinergic signalling occur in the same cells and regulate mucociliary clearance. Thus, tuft cells are potentially involved in the regulation of innate immunity in human airways.
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Affiliation(s)
| | - Thomas Husnik
- Institute of Anatomy and Cell Biology, Saarland University, Homburg, Germany
| | - Malin Zylka
- Institute of Anatomy and Cell Biology, Saarland University, Homburg, Germany
| | - Nele Duda
- Institute of Anatomy and Cell Biology, Saarland University, Homburg, Germany
| | - Veit Flockerzi
- Institute for Experimental and Clinical Pharmacology and Toxicology, Preclinical Center for Molecular Signaling, Saarland University, Homburg, Germany
| | - Thomas Tschernig
- Institute of Anatomy and Cell Biology, Saarland University, Homburg, Germany
| | - Stephan Maxeiner
- Institute of Anatomy and Cell Biology, Saarland University, Homburg, Germany
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Clinical potential of pupillary light reflex parameters as objective indicators reflecting chronic rhinosinusitis-specific quality of life: a 12-month prospective longitudinal study. Sci Rep 2021; 11:21586. [PMID: 34732808 PMCID: PMC8566598 DOI: 10.1038/s41598-021-01153-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 10/25/2021] [Indexed: 11/09/2022] Open
Abstract
Pupillary light reflex (PLR) and heart rate variability (HRV) parameters can be objective indicators of chronic rhinosinusitis (CRS) status from the viewpoint of autonomic nervous system activity. This study aimed to establish objective indicators for CRS using the 22-item Sino-Nasal Outcome Test (SNOT-22) and PLR/HRV parameters. Sixty-seven patients were prospectively and longitudinally followed up after surgical treatment. We investigated changes in SNOT-22 scores, representing CRS-specific quality of life (QOL). We prepared two models: linear regression model adjusting clinical factors as predictor variables (model 1) and linear mixed-effects model adjusting clinical factors and among-individual variability (model 2). We compared Akaike's information criterion (AIC) values and regression coefficients. The model with lower AIC values was defined as the better-fit model. Model 2 showed lower AIC values in all parameters (better-fit model). Three parameters showed opposite results between the two models. The better-fit models showed significances in the five PLR parameters but not in any HRV parameters. Among these PLR parameters, constriction latency can be the most robust indicator because of the narrowest 95% confidence intervals. Adjusting the among-individual variability while investigating clinical potential of PLR/HRV parameters to reflect CRS-specific QOL can improve the model fit, thereby reaching robust conclusions from obtained data.
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Nguyen TN, Suzuki H, Yoshida Y, Ohkubo JI, Wakasugi T, Kitamura T. Decreased CFTR/PPARγ and increased transglutaminase 2 in nasal polyps. Auris Nasus Larynx 2021; 49:964-972. [PMID: 34728118 DOI: 10.1016/j.anl.2021.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 09/27/2021] [Accepted: 10/13/2021] [Indexed: 10/19/2022]
Abstract
OBJECTIVE Transglutaminase (TGM)2 and peroxisome proliferator-activated receptor (PPAR)γ are thought to participate in the pathogenesis of nasal polyp formation in cystic fibrosis (CF). We herein investigated expressions of cystic fibrosis transmembrane conductance regulator (CFTR), TGM2, PPARγ and isopeptide bonds, a reaction product of TGM, in non-CF nasal polyps. METHODS Nasal polyps and inferior turbinates were collected from chronic rhinosinusitis patients without CF during transnasal endoscopic sinonasal surgery. Expressions of CFTR, TGM2, isopeptide bonds and PPARγ were examined by fluorescence immunohistochemistry and quantitative RT-PCR. Expression of CFTR was also analyzed by Western blot. RESULTS Immunohistochemical fluorescence of the nasal polyp was significantly lower for CFTR and PPARγ, and significantly higher for TGM2 and isopeptide bonds than that of the turbinate mucosa. Lower expression of CFTR in the nasal polyp than in the turbinate mucosa was also observed in Western blot. Expression of PPARG mRNA was significantly lower in the nasal polyp than in the turbinate mucosa, whereas expressions of CFTR mRNA or TGM2 mRNA did not differ between the two tissues. Immunohistochemical fluorescence for CFTR showed significant negative correlation with that for TGM2 and isopeptide bonds, and significant positive correlation with that for PPARγ. The fluorescence for TGM2 was positively correlated with that for isopeptide bonds and negatively correlated with that for PPARγ. The fluorescence for isopeptide bonds tended to be negatively correlated with that for PPARγ. CONCLUSIONS These results suggest a possible role of the CFTR-TGM2-PPARγ cascade in the pathogenesis of nasal polyp formation in non-CF patients as in CF patients.
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Affiliation(s)
- Thi Nga Nguyen
- Department of Otorhinolaryngology-Head and Neck Surgery and Department of Immunology and Parasitology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan; Faculty of Public Health, Vinh Medical University, Vinh City, Vietnam
| | - Hideaki Suzuki
- Department of Otorhinolaryngology-Head and Neck Surgery and Department of Immunology and Parasitology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan.
| | - Yasuhiro Yoshida
- Department of Immunology and Parasitology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Jun-Ichi Ohkubo
- Department of Otorhinolaryngology-Head and Neck Surgery and Department of Immunology and Parasitology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Tetsuro Wakasugi
- Department of Otorhinolaryngology-Head and Neck Surgery and Department of Immunology and Parasitology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Takuro Kitamura
- Department of Otorhinolaryngology-Head and Neck Surgery and Department of Immunology and Parasitology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
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Nguyen TN, Do BH, Kitamura T, Ohkubo JI, Wakasugi T, Ohbuchi T, Suzuki H. Expression of Cl - channels/transporters in nasal polyps. Eur Arch Otorhinolaryngol 2020; 277:2263-2270. [PMID: 32333139 DOI: 10.1007/s00405-020-05981-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 04/11/2020] [Indexed: 11/26/2022]
Abstract
PURPOSE Nasal polyp formation is a common sequela of prolonged chronic rhinosinusitis, but the mechanism underlying this disease state is still controversial. We compared the expressions of Cl- channels/transporters in nasal polyps with those in inferior turbinates to explore whether a deficiency in Cl- transport may participate in the pathophysiology of nasal polyp formation as in patients with cystic fibrosis. METHODS Nasal polyps and inferior turbinates were collected from 12 chronic rhinosinusitis patients with hypertrophic rhinitis and/or nasal polyps. Expressions of cystic fibrosis transmembrane conductance regulator (CFTR), pendrin, Na+-K+-2Cl- cotransporter 1 (NKCC1), SLC26A3, TMEM16A and anion exchanger 2 (AE2) were examined by fluorescence immunohistochemistry using Alexa Fluor 488. RESULTS CFTR was weakly expressed on the epithelial surface of the turbinate mucosa whereas the nasal polyps showed almost no fluorescence. Pendrin was mainly expressed on the epithelial surface in both tissues. The fluorescence was moderate in the nasal polyps and strong in the turbinate mucosa. For NKCC1, moderate fluorescence was observed throughout the entire epithelial layer of the nasal polyps, but the turbinate mucosa exhibited almost no fluorescence. On the other hand, no fluorescence for SLC26A3, TMEM16A or AE2 was seen in either tissue. CONCLUSION These results suggest that CFTR, pendrin and NKCC1 may participate in the pathogenesis of nasal mucosal edema and play roles in the mechanism of nasal polyp formation.
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Affiliation(s)
- Thi Nga Nguyen
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, Fukuoka, 807-8555, Japan
| | - Ba Hung Do
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, Fukuoka, 807-8555, Japan
| | - Takuro Kitamura
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, Fukuoka, 807-8555, Japan
| | - Jun-Ichi Ohkubo
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, Fukuoka, 807-8555, Japan
| | - Tetsuro Wakasugi
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, Fukuoka, 807-8555, Japan
| | - Toyoaki Ohbuchi
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, Fukuoka, 807-8555, Japan
| | - Hideaki Suzuki
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, Fukuoka, 807-8555, Japan.
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