1
|
Abo M, Imamura K, Hosogi S, Kobayashi T, Takeda Y, Kase K, Koba H, Watanabe S, Ohkura N, Hara J, Yano S. Comparing region of interest selection and whole-field analysis for measurement of ciliary beat frequency in high-speed video analysis. Respir Investig 2024; 62:419-425. [PMID: 38489921 DOI: 10.1016/j.resinv.2024.02.016] [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: 07/13/2023] [Revised: 12/05/2023] [Accepted: 02/23/2024] [Indexed: 03/17/2024]
Abstract
BACKGROUND Ciliary beat frequency (CBF) is crucial in mucociliary clearance. High-speed video analysis (HSVA) is commonly used to measure CBF but lacks standardization. We compared visual observation and computer-assisted calculation using fast Fourier transformation (FFT) in freshly collected bronchial ciliary epithelial cells and cultured cells. METHODS Bronchial epithelial cells were obtained from 12 patients who required bronchoscopic examination. Eighty-five videos of ciliary movement of freshly collected and cultured cells were recorded and used to calculate CBF using manual observation, region of interest (ROI) selection, and whole-field analysis. RESULTS CBF measured by the ROI selection method strongly correlated with that measured using manual observation, especially in freshly collected cells. However, 27.8% of the manual observation method values were doubled in the ROI selection method, probably because a round trip of cilia was calculated as two cycles and needed to be corrected to 1/2 value. Upon increasing the number of ROIs, the results of the ROI selection method came closer to that of WFA. CONCLUSIONS Computer-assisted calculation using FFT can aid in measuring CBF; however, current methods require visual confirmation. Further automated evaluation techniques are needed to establish more standardized and generalized CBF measurement methods using HSVA.
Collapse
Affiliation(s)
- Miki Abo
- Kanazawa University Health Service Center, Kakuma-machi, Kanazawa, Ishikawa, 920-1192, Japan; Department of Respiratory Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan.
| | - Kousuke Imamura
- Department of Electrical, Information and Communication Engineering, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa, 920-1192, Japan
| | - Shigekuni Hosogi
- Department of Clinical and Translational Physiology, Kyoto Pharmaceutical University, Kyoto, 607-8414, Japan
| | - Takafumi Kobayashi
- Division of Medical Oncology, Cancer Research Institute, Kanazawa University, Kanazawa, Ishikawa, 920-0934, Japan
| | - Yoshihiro Takeda
- Department of Respiratory Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Kazumasa Kase
- Department of Respiratory Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Hayato Koba
- Department of Respiratory Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Satoshi Watanabe
- Department of Respiratory Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Noriyuki Ohkura
- Department of Respiratory Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Johsuke Hara
- Department of Respiratory Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Seiji Yano
- Department of Respiratory Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan; Division of Medical Oncology, Cancer Research Institute, Kanazawa University, Kanazawa, Ishikawa, 920-0934, Japan; Nano Life Science Institute (WPI-NanoLSI), Kanazawa University, Kanazawa, Ishikawa, 920-1192, Japan
| |
Collapse
|
2
|
Baz-Redón N, Sánchez-Bellver L, Fernández-Cancio M, Rovira-Amigo S, Burgoyne T, Ranjit R, Aquino V, Toro-Barrios N, Carmona R, Polverino E, Cols M, Moreno-Galdó A, Camats-Tarruella N, Marfany G. Primary Ciliary Dyskinesia and Retinitis Pigmentosa: Novel RPGR Variant and Possible Modifier Gene. Cells 2024; 13:524. [PMID: 38534367 DOI: 10.3390/cells13060524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 03/09/2024] [Accepted: 03/13/2024] [Indexed: 03/28/2024] Open
Abstract
We report a novel RPGR missense variant co-segregated with a familial X-linked retinitis pigmentosa (XLRP) case. The brothers were hemizygous for this variant, but only the proband presented with primary ciliary dyskinesia (PCD). Thus, we aimed to elucidate the role of the RPGR variant and other modifier genes in the phenotypic variability observed in the family and its impact on motile cilia. The pathogenicity of the variant on the RPGR protein was evaluated by in vitro studies transiently transfecting the mutated RPGR gene, and immunofluorescence analysis on nasal brushing samples. Whole-exome sequencing was conducted to identify potential modifier variants. In vitro studies showed that the mutated RPGR protein could not localise to the cilium and impaired cilium formation. Accordingly, RPGR was abnormally distributed in the siblings' nasal brushing samples. In addition, a missense variant in CEP290 was identified. The concurrent RPGR variant influenced ciliary mislocalisation of the protein. We provide a comprehensive characterisation of motile cilia in this XLRP family, with only the proband presenting PCD symptoms. The variant's pathogenicity was confirmed, although it alone does not explain the respiratory symptoms. Finally, the CEP290 gene may be a potential modifier for respiratory symptoms in patients with RPGR mutations.
Collapse
Affiliation(s)
- Noelia Baz-Redón
- Growth and Development Research Group, Vall d'Hebron Research Institute (VHIR), Hospital Universitari Vall d'Hebron, 08035 Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Laura Sánchez-Bellver
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Departament de Genètica, Microbiologia i Estadística, Universitat de Barcelona, 08028 Barcelona, Spain
| | - Mónica Fernández-Cancio
- Growth and Development Research Group, Vall d'Hebron Research Institute (VHIR), Hospital Universitari Vall d'Hebron, 08035 Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Sandra Rovira-Amigo
- Growth and Development Research Group, Vall d'Hebron Research Institute (VHIR), Hospital Universitari Vall d'Hebron, 08035 Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Department of Paediatrics, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, 08035 Barcelona, Spain
| | - Thomas Burgoyne
- Royal Brompton Hospital, Guy's and St Thomas' NHS Foundation Trust, London SW3 6NP, UK
- Institute of Ophthalmology, University College London, London EC1V 9EL, UK
| | - Rai Ranjit
- Royal Brompton Hospital, Guy's and St Thomas' NHS Foundation Trust, London SW3 6NP, UK
| | - Virginia Aquino
- Plataforma Andaluza de Medicina Computacional, Fundación Pública Andaluza Progreso y Salud, 41092 Sevilla, Spain
| | - Noemí Toro-Barrios
- Plataforma Andaluza de Medicina Computacional, Fundación Pública Andaluza Progreso y Salud, 41092 Sevilla, Spain
| | - Rosario Carmona
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Plataforma Andaluza de Medicina Computacional, Fundación Pública Andaluza Progreso y Salud, 41092 Sevilla, Spain
| | - Eva Polverino
- Pneumology Research Group, Vall d'Hebron Research Institute (VHIR), Hospital Universitari Vall d'Hebron, 08035 Barcelona, Spain
- Pneumology Department, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, 08035 Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Maria Cols
- Paediatric Pulmonology Department and Cystic Fibrosis Unit, Hospital Sant Joan de Déu, 08950 Esplugues de Llobregat, Spain
| | - Antonio Moreno-Galdó
- Growth and Development Research Group, Vall d'Hebron Research Institute (VHIR), Hospital Universitari Vall d'Hebron, 08035 Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Department of Paediatrics, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, 08035 Barcelona, Spain
- Department of Paediatrics, Obstetrics, Gynecology, Preventive Medicine and Public Health, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Núria Camats-Tarruella
- Growth and Development Research Group, Vall d'Hebron Research Institute (VHIR), Hospital Universitari Vall d'Hebron, 08035 Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Gemma Marfany
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Departament de Genètica, Microbiologia i Estadística, Universitat de Barcelona, 08028 Barcelona, Spain
- Institute of Biomedicine (IBUB-IRSJD), Universitat de Barcelona, 08028 Barcelona, Spain
| |
Collapse
|
3
|
Zhao X, Ge H, Xu W, Cheng C, Zhou W, Xu Y, Fan J, Liu Y, Tian X, Xu KF, Zhang X. Lack of CFAP54 causes primary ciliary dyskinesia in a mouse model and human patients. Front Med 2023; 17:1236-1249. [PMID: 37725231 DOI: 10.1007/s11684-023-0997-7] [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: 09/23/2022] [Accepted: 03/06/2023] [Indexed: 09/21/2023]
Abstract
Primary ciliary dyskinesia (PCD) is a highly heterogeneous recessive inherited disorder. FAP54, the homolog of CFAP54 in Chlamydomonas reinhardtii, was previously demonstrated as the C1d projection of the central microtubule apparatus of flagella. A Cfap54 knockout mouse model was then reported to have PCD-relevant phenotypes. Through whole-exome sequencing, compound heterozygous variants c.2649_2657delinC (p. E883Dfs*47) and c.7312_7313insCGCAGGCTGAATTCTTGG (p. T2438delinsTQAEFLA) in a new suspected PCD-relevant gene, CFAP54, were identified in an individual with PCD. Two missense variants, c.4112A>C (p. E1371A) and c.6559C>T (p. P2187S), in CFAP54 were detected in another unrelated patient. In this study, a minigene assay was conducted on the frameshift mutation showing a reduction in mRNA expression. In addition, a CFAP54 in-frame variant knock-in mouse model was established, which recapitulated the typical symptoms of PCD, including hydrocephalus, infertility, and mucus accumulation in nasal sinuses. Correspondingly, two missense variants were deleterious, with a dramatic reduction in mRNA abundance from bronchial tissue and sperm. The identification of PCD-causing variants of CFAP54 in two unrelated patients with PCD for the first time provides strong supportive evidence that CFAP54 is a new PCD-causing gene. This study further helps expand the disease-associated gene spectrum and improve genetic testing for PCD diagnosis in the future.
Collapse
Affiliation(s)
- Xinyue Zhao
- McKusick-Zhang Center for Genetic Medicine, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100005, China
| | - Haijun Ge
- McKusick-Zhang Center for Genetic Medicine, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100005, China
| | - Wenshuai Xu
- McKusick-Zhang Center for Genetic Medicine, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100005, China
| | - Chongsheng Cheng
- Department of Pulmonary and Critical Care Medicine, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100730, China
| | - Wangji Zhou
- Department of Pulmonary and Critical Care Medicine, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100730, China
| | - Yan Xu
- Department of Pulmonary and Critical Care Medicine, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100730, China
| | - Junping Fan
- Department of Pulmonary and Critical Care Medicine, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100730, China
| | - Yaping Liu
- McKusick-Zhang Center for Genetic Medicine, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100005, China.
| | - Xinlun Tian
- Department of Pulmonary and Critical Care Medicine, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100730, China.
| | - Kai-Feng Xu
- Department of Pulmonary and Critical Care Medicine, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100730, China
| | - Xue Zhang
- McKusick-Zhang Center for Genetic Medicine, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100005, China
| |
Collapse
|
4
|
Schneiter M, Tschanz SA, Escher A, Müller L, Frenz M. The Cilialyzer - A freely available open-source software for the analysis of mucociliary activity in respiratory cells. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2023; 241:107744. [PMID: 37598471 DOI: 10.1016/j.cmpb.2023.107744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 07/12/2023] [Accepted: 08/02/2023] [Indexed: 08/22/2023]
Abstract
BACKGROUND AND OBJECTIVE Primary ciliary dyskinesia (PCD) is a rare genetic disorder causing a defective ciliary structure, which predominantly leads to an impaired mucociliary clearance and associated airway disease. As there is currently no single diagnostic gold standard test, PCD is diagnosed by a combination of several methods comprising genetic testing and the examination of the ciliary structure and function. Among the approved diagnostic methods, only high-speed video microscopy (HSVM) allows to directly observe the ciliary motion and therefore, to directly assess ciliary function. In the present work, we present our recently developed freely available open-source software - termed "Cilialyzer", which has been specifically designed to support and facilitate the analysis of the mucociliary activity in respiratory epithelial cells captured by high-speed video microscopy. METHODS In its current state, the Cilialyzer software enables clinical PCD analysts to load, preprocess and replay recorded image sequences as well as videos with a feature-rich replaying module facilitating the commonly performed qualitative visual assessment of ciliary function (including the assessment of the ciliary beat pattern). The image processing methods made accessible through an intuitive user interface allow clinical specialists to comfortably compute the ciliary beating frequency (CBF), the activity map and the "frequency correlation length" - an observable getting newly introduced. Furthermore, the Cilialyzer contains a simple-to-use particle tracking interface to determine the mucociliary transport speed. RESULTS Cilialyzer is fully written in the Python programming language and freely available under the terms of the MIT license. The proper functioning of the computational analysis methods constituting the Cilialyzer software is demonstrated by using simulated and representative sample data from clinical practice. Additionally, the software was used to analyze high-speed videos showing samples obtained from healthy controls and genetically confirmed PCD cases (DNAI1 and DNAH11 mutations) to show its clinical applicability. CONCLUSIONS Cilialyzer serves as a useful clinical tool for PCD analysts and provides new quantitative information awaiting to be clinically evaluated using cohorts of PCD. As Cilialyzer is freely available under the terms of a permissive open-source license, it serves as a ground frame for further development of computational methods aiming at the quantification and automation of the analysis of mucociliary activity captured by HSVM.
Collapse
Affiliation(s)
- Martin Schneiter
- Institute of Applied Physics, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland; Institute of Anatomy, University of Bern, Baltzerstrasse 2, 3012 Bern, Switzerland.
| | - Stefan A Tschanz
- Institute of Anatomy, University of Bern, Baltzerstrasse 2, 3012 Bern, Switzerland
| | - Anaïs Escher
- Department of Paediatrics, Inselspital Bern, University Hospital, University of Bern, 3010 Bern, Switzerland; Department of BioMedical Research, University of Bern, 3008 Bern, Switzerland
| | - Loretta Müller
- Department of Paediatrics, Inselspital Bern, University Hospital, University of Bern, 3010 Bern, Switzerland; Department of BioMedical Research, University of Bern, 3008 Bern, Switzerland
| | - Martin Frenz
- Institute of Applied Physics, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland.
| |
Collapse
|
5
|
Bricmont N, Bonhiver R, Benchimol L, Louis B, Papon JF, Monseur J, Donneau AF, Moermans C, Schleich F, Calmès D, Poirrier AL, Louis R, Seghaye MC, Kempeneers C. Temporal Stability of Ciliary Beating Post Nasal Brushing, Modulated by Storage Temperature. Diagnostics (Basel) 2023; 13:2974. [PMID: 37761341 PMCID: PMC10527713 DOI: 10.3390/diagnostics13182974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 08/31/2023] [Accepted: 09/09/2023] [Indexed: 09/29/2023] Open
Abstract
Primary ciliary dyskinesia is a heterogeneous, inherited motile ciliopathy in which respiratory cilia beat abnormally, and some ultrastructural ciliary defects and specific genetic mutations have been associated with particular ciliary beating alterations. Ciliary beating can be evaluated using digital high-speed videomicroscopy (DHSV). However, normal reference values, essential to assess ciliary beating in patients referred for a PCD diagnostic, vary between centres, as minor variations in protocols might influence ciliary beating. Consequently, establishment of normal values is essential for each PCD diagnostic centre. We aimed to evaluate whether delay after sampling, and temperature for conservation of respiratory ciliated samples, might modify assessments of ciliary beating. In total, 37 healthy nasal brushing samples of respiratory ciliated epithelia were collected. Video sequences were recorded at 37 °C immediately using DHSV. Then, the samples were divided and conserved at 4 °C or at room temperature (RT). Ciliated beating edges were then recorded at 37 °C, at 3 h and at 9 h post sampling. In six samples, recordings were continued up to 72 h after sampling. Ciliary beating was assessed manually by ciliary beat frequency (CBFM) and ciliary beat pattern (CBP). A semi-automatic software was used for quantitative analysis. Both CBF and CBP evaluated manually and by a semi-automated method were stable 9 h after sampling. CBFM was higher when evaluated using samples stored at RT than at 4 °C. CBP and the semi-automated evaluation of ciliary beating were not affected by storage temperature. When establishing normal references values, ciliary beating can be evaluated at 37 °C up to 9 h after nasal brushing, but the storage temperature modifies ciliary beating and needs to be controlled.
Collapse
Affiliation(s)
- Noemie Bricmont
- Pneumology Laboratory, I3 Group, GIGA Research Center, University of Liège, 4000 Liège, Belgium; (R.B.); (C.M.); (F.S.); (R.L.); (C.K.)
- Division of Respirology, Department of Pediatrics, University Hospital Liège, 4000 Liège, Belgium
| | - Romane Bonhiver
- Pneumology Laboratory, I3 Group, GIGA Research Center, University of Liège, 4000 Liège, Belgium; (R.B.); (C.M.); (F.S.); (R.L.); (C.K.)
- Division of Respirology, Department of Pediatrics, University Hospital Liège, 4000 Liège, Belgium
| | - Lionel Benchimol
- Department of ENT, University Hospital Liège, 4000 Liège, Belgium; (L.B.); (A.-L.P.)
| | - Bruno Louis
- Institut Mondor de Recherche Biomédicale, INSERM-UPEC UMR 955, CNRS ERL7000, 94010 Créteil, France; (B.L.); (J.-F.P.)
| | - Jean-François Papon
- Institut Mondor de Recherche Biomédicale, INSERM-UPEC UMR 955, CNRS ERL7000, 94010 Créteil, France; (B.L.); (J.-F.P.)
- ENT Department, Assistance Publique-Hôpitaux de Paris (AP-HP), Université Paris-Saclay, Hôpital Bicêtre, 94270 Le Kremlin-Bicêtre, France
| | - Justine Monseur
- Biostatistics and Research Method Center-Public Health Department, University of Liège, 4000 Liège, Belgium; (J.M.); (A.-F.D.)
| | - Anne-Françoise Donneau
- Biostatistics and Research Method Center-Public Health Department, University of Liège, 4000 Liège, Belgium; (J.M.); (A.-F.D.)
| | - Catherine Moermans
- Pneumology Laboratory, I3 Group, GIGA Research Center, University of Liège, 4000 Liège, Belgium; (R.B.); (C.M.); (F.S.); (R.L.); (C.K.)
- Department of Pneumology, University Hospital Liège, 4000 Liège, Belgium;
| | - Florence Schleich
- Pneumology Laboratory, I3 Group, GIGA Research Center, University of Liège, 4000 Liège, Belgium; (R.B.); (C.M.); (F.S.); (R.L.); (C.K.)
- Department of Pneumology, University Hospital Liège, 4000 Liège, Belgium;
| | - Doriane Calmès
- Department of Pneumology, University Hospital Liège, 4000 Liège, Belgium;
| | - Anne-Lise Poirrier
- Department of ENT, University Hospital Liège, 4000 Liège, Belgium; (L.B.); (A.-L.P.)
| | - Renaud Louis
- Pneumology Laboratory, I3 Group, GIGA Research Center, University of Liège, 4000 Liège, Belgium; (R.B.); (C.M.); (F.S.); (R.L.); (C.K.)
- Department of Pneumology, University Hospital Liège, 4000 Liège, Belgium;
| | - Marie-Christine Seghaye
- Division of Cardiology, Department of Pediatrics, University Hospital Liège, University of Liège, 4000 Liège, Belgium;
| | - Céline Kempeneers
- Pneumology Laboratory, I3 Group, GIGA Research Center, University of Liège, 4000 Liège, Belgium; (R.B.); (C.M.); (F.S.); (R.L.); (C.K.)
- Division of Respirology, Department of Pediatrics, University Hospital Liège, 4000 Liège, Belgium
| |
Collapse
|
6
|
Kempeneers C, Bonhiver R, Bricmont N, Pirotte M, Engelskirchen S, Benchimol L, Calmes D, Guissard F, Moermans C, Seghaye MC, Louis R, Schleich F. Ciliary dyskinesia in severe asthma is not affected by chronic mucus hypersecretion. ERJ Open Res 2023; 9:00220-2023. [PMID: 37868147 PMCID: PMC10588802 DOI: 10.1183/23120541.00220-2023] [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: 04/16/2023] [Accepted: 07/09/2023] [Indexed: 10/24/2023] Open
Abstract
Chronic mucus hypersecretion (CMH) is linked to increased asthma severity. Ciliary dyskinesia is present in severe asthma but CMH was not associated with a worse ciliary dysfunction, suggesting another mechanism to explain chronic cough and phlegm. https://bit.ly/3JNUgGr.
Collapse
Affiliation(s)
- Céline Kempeneers
- Division of Respirology, Department of Pediatrics, University Hospital Liège, Liège, Belgium
- Pneumology laboratory, I3 Group, GIGA Research Center, University of Liège, Liège, Belgium
| | - Romane Bonhiver
- Division of Respirology, Department of Pediatrics, University Hospital Liège, Liège, Belgium
- Pneumology laboratory, I3 Group, GIGA Research Center, University of Liège, Liège, Belgium
| | - Noëmie Bricmont
- Division of Respirology, Department of Pediatrics, University Hospital Liège, Liège, Belgium
- Pneumology laboratory, I3 Group, GIGA Research Center, University of Liège, Liège, Belgium
| | - Maud Pirotte
- Division of Respirology, Department of Pediatrics, University Hospital Liège, Liège, Belgium
| | - Sara Engelskirchen
- Division of Respirology, Department of Pediatrics, University Hospital Liège, Liège, Belgium
- Pneumology laboratory, I3 Group, GIGA Research Center, University of Liège, Liège, Belgium
| | | | - Doriane Calmes
- Department of Pneumology, University Hospital Liège, Liège, Belgium
| | | | - Catherine Moermans
- Pneumology laboratory, I3 Group, GIGA Research Center, University of Liège, Liège, Belgium
- Department of Pneumology, University Hospital Liège, Liège, Belgium
| | - Marie-Christine Seghaye
- Pneumology laboratory, I3 Group, GIGA Research Center, University of Liège, Liège, Belgium
- Division of Cardiology, Department of Pediatrics, University Hospital Liège and University of Liège, Liège, Belgium
| | - Renaud Louis
- Pneumology laboratory, I3 Group, GIGA Research Center, University of Liège, Liège, Belgium
- Department of Pneumology, University Hospital Liège, Liège, Belgium
| | - Florence Schleich
- Pneumology laboratory, I3 Group, GIGA Research Center, University of Liège, Liège, Belgium
- Department of Pneumology, University Hospital Liège, Liège, Belgium
| |
Collapse
|
7
|
Marthin JK, Nielsen KG, Mortensen J. Quantitative 99mTc-albumin colloid nasal mucociliary clearance as an outcome in primary ciliary dyskinesia. ERJ Open Res 2023; 9:00345-2023. [PMID: 37701364 PMCID: PMC10493710 DOI: 10.1183/23120541.00345-2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Accepted: 06/05/2023] [Indexed: 09/14/2023] Open
Abstract
Background Primary ciliary dyskinesia (PCD) is an inherited disorder in which dyskinetic cilia cause impaired mucociliary clearance of upper and lower airways. Airway ciliary movement can be indirectly tested in vivo after administration of a radiolabelled tracer to the lower airways for assessment of pulmonary mucociliary clearance or to the nose for assessing nasal mucociliary clearance (NMC). With this study, we investigated NMC as a quantifiable study outcome parameter in patients with PCD. Material and methods This single centre proof-of-concept study on NMC velocity investigated patients with PCD across different genotypes and nasal nitric oxide (nasal NO) levels. Healthy controls were used for comparison. NMC was determined as velocity in mm·min-1 of a nasally applied 99mTc-albumin colloid tracer. Using a gamma camera, repeated dynamic series of images each lasting 30 s were acquired during a 10-minute period and digitally stored. Results NMC velocity was investigated in seven patients with PCD (aged 9-31 years) and five adult healthy controls. Mean NMC velocity in healthy controls (8.5 mm·min-1) was significantly higher compared with people with PCD (0.00 mm·min-1, p<0.0001). NMC was completely absent in all included patients with PCD across different PCD genotypes and regardless of nasal NO values. The success rate of the test was 100% in both groups. Conclusion NMC velocity discriminated highly significantly between patients with PCD and healthy controls. We suggest here a fast and feasible set up for NMC measurements that is easily applicable for any clinical trial involving PCD medication aimed for the nasal compartment, a step before or parallel to conducting clinical trials investigating whole-lung ciliary function in PCD.
Collapse
Affiliation(s)
- June K. Marthin
- Danish PCD Centre, Paediatric Pulmonary Service, ERN Accredited, Department of Paediatric and Adolescent Medicine, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Kim G. Nielsen
- Danish PCD Centre, Paediatric Pulmonary Service, ERN Accredited, Department of Paediatric and Adolescent Medicine, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Shared senior authorship
| | - Jann Mortensen
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Department of Clinical Physiology and Nuclear Medicine, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
- Department of Medicine, The National Hospital, Torshavn, The Faroe Islands
- Shared senior authorship
| |
Collapse
|
8
|
Fawcett LK, Turgutoglu N, Allan KM, Belessis Y, Widger J, Jaffe A, Waters SA. Comparing Cytology Brushes for Optimal Human Nasal Epithelial Cell Collection: Implications for Airway Disease Diagnosis and Research. J Pers Med 2023; 13:jpm13050864. [PMID: 37241034 DOI: 10.3390/jpm13050864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Revised: 05/17/2023] [Accepted: 05/17/2023] [Indexed: 05/28/2023] Open
Abstract
Primary nasal epithelial cells and culture models are used as important diagnostic, research and drug development tools for several airway diseases. Various instruments have been used for the collection of human nasal epithelial (HNE) cells but no global consensus yet exists regarding the optimal tool. This study compares the efficiency of two cytology brushes (Olympus (2 mm diameter) and Endoscan (8 mm diameter)) in collecting HNE cells. The study involved two phases, with phase one comparing the yield, morphology and cilia beat frequency (CBF) of cells collected from paediatric participants using each of the two brushes. Phase two compared nasal brushing under general anaesthetic and in the awake state, across a wide age range, via the retrospective audit of the use of the Endoscan brush in 145 participants. Results indicated no significant difference in CBF measurements between the two brushes, suggesting that the choice of brush does not compromise diagnostic accuracy. However, the Endoscan brush collected significantly more total and live cells than the Olympus brush, making it a more efficient option. Importantly, the Endoscan brush is more cost-effective, with a notable price difference between the two brushes.
Collapse
Affiliation(s)
- Laura K Fawcett
- Discipline of Paediatrics and Child Health, School of Clinical Medicine, Faculty of Medicine and Health, UNSW Sydney, Sydney, NSW 2052, Australia
- Department of Respiratory Medicine, Sydney Children's Hospital, Sydney, NSW 2031, Australia
| | - Nihan Turgutoglu
- Discipline of Paediatrics and Child Health, School of Clinical Medicine, Faculty of Medicine and Health, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Katelin M Allan
- Discipline of Paediatrics and Child Health, School of Clinical Medicine, Faculty of Medicine and Health, UNSW Sydney, Sydney, NSW 2052, Australia
- School of Biomedical Sciences, Faculty of Medicine and Health, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Yvonne Belessis
- Discipline of Paediatrics and Child Health, School of Clinical Medicine, Faculty of Medicine and Health, UNSW Sydney, Sydney, NSW 2052, Australia
- Department of Respiratory Medicine, Sydney Children's Hospital, Sydney, NSW 2031, Australia
| | - John Widger
- Discipline of Paediatrics and Child Health, School of Clinical Medicine, Faculty of Medicine and Health, UNSW Sydney, Sydney, NSW 2052, Australia
- Department of Respiratory Medicine, Sydney Children's Hospital, Sydney, NSW 2031, Australia
| | - Adam Jaffe
- Discipline of Paediatrics and Child Health, School of Clinical Medicine, Faculty of Medicine and Health, UNSW Sydney, Sydney, NSW 2052, Australia
- Department of Respiratory Medicine, Sydney Children's Hospital, Sydney, NSW 2031, Australia
| | - Shafagh A Waters
- Discipline of Paediatrics and Child Health, School of Clinical Medicine, Faculty of Medicine and Health, UNSW Sydney, Sydney, NSW 2052, Australia
- Department of Respiratory Medicine, Sydney Children's Hospital, Sydney, NSW 2031, Australia
- School of Biomedical Sciences, Faculty of Medicine and Health, UNSW Sydney, Sydney, NSW 2052, Australia
| |
Collapse
|
9
|
Arora S, Rana M, Sachdev A, D’Souza JS. Appearing and disappearing acts of cilia. J Biosci 2023. [DOI: 10.1007/s12038-023-00326-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
|
10
|
The RSPH4A Gene in Primary Ciliary Dyskinesia. Int J Mol Sci 2023; 24:ijms24031936. [PMID: 36768259 PMCID: PMC9915723 DOI: 10.3390/ijms24031936] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 12/29/2022] [Accepted: 01/16/2023] [Indexed: 01/21/2023] Open
Abstract
The radial spoke head protein 4 homolog A (RSPH4A) gene is one of more than 50 genes that cause Primary ciliary dyskinesia (PCD), a rare genetic ciliopathy. Genetic mutations in the RSPH4A gene alter an important protein structure involved in ciliary pathogenesis. Radial spoke proteins, such as RSPH4A, have been conserved across multiple species. In humans, ciliary function deficiency caused by RSPH4A pathogenic variants results in a clinical phenotype characterized by recurrent oto-sino-pulmonary infections. More than 30 pathogenic RSPH4A genetic variants have been associated with PCD. In Puerto Rican Hispanics, a founder mutation (RSPH4A (c.921+3_921+6delAAGT (intronic)) has been described. The spectrum of the RSPH4A PCD phenotype does not include laterality defects, which results in a challenging diagnosis. PCD diagnostic tools can combine transmission electron microscopy (TEM), nasal nitric oxide (nNO), High-Speed Video microscopy Analysis (HSVA), and immunofluorescence. The purpose of this review article is to provide a comprehensive overview of current knowledge about the RSPH4A gene in PCD, ranging from basic science to human clinical phenotype.
Collapse
|
11
|
Arora S, Rana M, Sachdev A, D'Souza JS. Appearing and disappearing acts of cilia. J Biosci 2023; 48:8. [PMID: 36924208 PMCID: PMC10005925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
The past few decades have seen a rise in research on vertebrate cilia and ciliopathy, with interesting collaborations between basic and clinical scientists. This work includes studies on ciliary architecture, composition, evolution, and organelle generation and its biological role. The human body has cells that harbour any of the following four types of cilia: 9+0 motile, 9+0 immotile, 9+2 motile, and 9+2 immotile. Depending on the type, cilia play an important role in cell/fluid movement, mating, sensory perception, and development. Defects in cilia are associated with a wide range of human diseases afflicting the brain, heart, kidneys, respiratory tract, and reproductive system. These are commonly known as ciliopathies and affect millions of people worldwide. Due to their complex genetic etiology, diagnosis and therapy have remained elusive. Although model organisms like Chlamydomonas reinhardtii have been a useful source for ciliary research, reports of a fascinating and rewarding translation of this research into mammalian systems, especially humans, are seen. The current review peeks into one of the complex features of this organelle, namely its birth, the common denominators across the formation of both 9+0 and 9+2 ciliary types, the molecules involved in ciliogenesis, and the steps that go towards regulating their assembly and disassembly.
Collapse
Affiliation(s)
- Shashank Arora
- School of Biological Sciences, UM-DAE Centre for Excellence in Basic Sciences, Kalina Campus, Santacruz (E), Mumbai 400098, India
| | | | | | | |
Collapse
|
12
|
Jackson CL, Bottier M. Methods for the assessment of human airway ciliary function. Eur Respir J 2022; 60:13993003.02300-2021. [PMID: 35595315 DOI: 10.1183/13993003.02300-2021] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 04/19/2022] [Indexed: 11/05/2022]
Affiliation(s)
- Claire L Jackson
- Primary Ciliary Dyskinesia Centre, NIHR Biomedical Research Centre, University Hospital Southampton NHS Foundation Trust, Southampton, UK .,School of Clinical and Experimental Sciences, University of Southampton Faculty of Medicine, Southampton, UK
| | - Mathieu Bottier
- Division of Molecular and Clinical Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee, UK
| |
Collapse
|
13
|
Nussbaumer M, Kieninger E, Tschanz SA, Savas ST, Casaulta C, Goutaki M, Blanchon S, Jung A, Regamey N, Kuehni CE, Latzin P, Müller L. Diagnosis of primary ciliary dyskinesia: discrepancy according to different algorithms. ERJ Open Res 2021; 7:00353-2021. [PMID: 34729370 PMCID: PMC8558472 DOI: 10.1183/23120541.00353-2021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 07/26/2021] [Indexed: 11/08/2022] Open
Abstract
Background Diagnosis of primary ciliary dyskinesia (PCD) is challenging since there is no gold standard test. The European Respiratory (ERS) and American Thoracic (ATS) Societies developed evidence-based diagnostic guidelines with considerable differences. Objective We aimed to compare the algorithms published by the ERS and the ATS with each other and with our own PCD-UNIBE algorithm in a clinical setting. Our algorithm is similar to the ERS algorithm with additional immunofluorescence staining. Agreement (Cohen's κ) and concordance between the three algorithms were assessed in patients with suspicion of PCD referred to our diagnostic centre. Results In 46 out of 54 patients (85%) the final diagnosis was concordant between all three algorithms (30 PCD negative, 16 PCD positive). In eight patients (15%) PCD diagnosis differed between the algorithms. Five patients (9%) were diagnosed as PCD only by the ATS, one (2%) only by the ERS and PCD-UNIBE, one (2%) only by the ATS and PCD-UNIBE, and one (2%) only by the PCD-UNIBE algorithm. Agreement was substantial between the ERS and the ATS (κ=0.72, 95% CI 0.53–0.92) and the ATS and the PCD-UNIBE (κ=0.73, 95% CI 0.53–0.92) and almost perfect between the ERS and the PCD-UNIBE algorithms (κ=0.92, 95% CI 0.80–1.00). Conclusion The different diagnostic algorithms lead to a contradictory diagnosis in a considerable proportion of patients. Thus, an updated, internationally harmonised and standardised PCD diagnostic algorithm is needed to improve diagnostics for these discordant cases. There is no gold standard test for diagnosing PCD. The use of existing diagnostic algorithms leads to contradicting results in many patients (15% in this study). Thus, an updated and internationally harmonised diagnostic guideline is needed.https://bit.ly/2U19Vvq
Collapse
Affiliation(s)
- Mirjam Nussbaumer
- Division of Paediatric Respiratory Medicine and Allergology, Dept of Paediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,Dept of BioMedical Research (DBMR), University of Bern, Bern, Switzerland
| | - Elisabeth Kieninger
- Division of Paediatric Respiratory Medicine and Allergology, Dept of Paediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,Dept of BioMedical Research (DBMR), University of Bern, Bern, Switzerland
| | | | - Sibel T Savas
- Division of Paediatric Respiratory Medicine and Allergology, Dept of Paediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,Dept of BioMedical Research (DBMR), University of Bern, Bern, Switzerland
| | - Carmen Casaulta
- Division of Paediatric Respiratory Medicine and Allergology, Dept of Paediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,Dept of BioMedical Research (DBMR), University of Bern, Bern, Switzerland
| | - Myrofora Goutaki
- Division of Paediatric Respiratory Medicine and Allergology, Dept of Paediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
| | - Sylvain Blanchon
- Dept Woman-Mother-Child, Service of Pediatrics, Pediatric Pulmonology and Cystic Fibrosis Unit, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Andreas Jung
- Division of Respiratory Medicine, University Children's Hospital Zurich, Zurich, Switzerland
| | - Nicolas Regamey
- Division of Paediatric Pulmonology, Children's Hospital Lucerne, Lucerne, Switzerland
| | - Claudia E Kuehni
- Division of Paediatric Respiratory Medicine and Allergology, Dept of Paediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
| | - Philipp Latzin
- Division of Paediatric Respiratory Medicine and Allergology, Dept of Paediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,Dept of BioMedical Research (DBMR), University of Bern, Bern, Switzerland
| | - Loretta Müller
- Division of Paediatric Respiratory Medicine and Allergology, Dept of Paediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,Dept of BioMedical Research (DBMR), University of Bern, Bern, Switzerland
| |
Collapse
|
14
|
Bricmont N, Alexandru M, Louis B, Papon JF, Kempeneers C. Ciliary Videomicroscopy: A Long Beat from the European Respiratory Society Guidelines to the Recognition as a Confirmatory Test for Primary Ciliary Dyskinesia. Diagnostics (Basel) 2021; 11:diagnostics11091700. [PMID: 34574040 PMCID: PMC8471803 DOI: 10.3390/diagnostics11091700] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 09/08/2021] [Accepted: 09/08/2021] [Indexed: 11/16/2022] Open
Abstract
Primary ciliary dyskinesia (PCD) is a rare inherited ciliopathy in which respiratory cilia are stationary or dyskinetic. The clinical presentation of PCD is highly non-specific since it includes infections and disorders of the upper (otitis and rhinosinusitis) and lower (neonatal respiratory distress, bronchitis, pneumonia and bronchiectasis) airways, starting in early life. Clinical examination alone does not allow a PCD diagnosis, which relies on several concordant tests, since none are sensitive or specific enough alone. Despite being the most sensitive and specific test to diagnose PCD, digital high-speed videomicroscopy (DHSV) is not sufficiently standardized, preventing its use with complete confidence as a confirmatory diagnostic test for PCD, or its inclusion in a diagnostic algorithm. Since the 2017 ERS recommendations for PCD diagnosis, three main issues remain to be solved in order to optimize DHSV ciliary beating evaluation: the problem in defining an accurate sensitivity and specificity as there is no gold standard method to diagnose all PCD cases, a lack of standardization in the operating procedure for processing respiratory samples, and in the choice of measured parameters (self-operating or not). The development of new automated analysis approaches is promising and will require full clinical validation.
Collapse
Affiliation(s)
- Noemie Bricmont
- Pneumology Laboratory, I3 Group, GIGA Research Center, University of Liège, 4000 Liège, Belgium;
- Correspondence:
| | - Mihaela Alexandru
- ENT Department, Assistance Publique-Hôpitaux de Paris (AP-HP), Université Paris-Saclay, Hôpital Bicêtre, 94270 Le Kremlin-Bicêtre, France; (M.A.); (J.-F.P.)
| | - Bruno Louis
- Institut Mondor de Recherche Biomédicale INSERM-UPEC UMR 955, CNRS ERL7000, 94010 Créteil, France;
| | - Jean-François Papon
- ENT Department, Assistance Publique-Hôpitaux de Paris (AP-HP), Université Paris-Saclay, Hôpital Bicêtre, 94270 Le Kremlin-Bicêtre, France; (M.A.); (J.-F.P.)
- Institut Mondor de Recherche Biomédicale INSERM-UPEC UMR 955, CNRS ERL7000, 94010 Créteil, France;
| | - Céline Kempeneers
- Pneumology Laboratory, I3 Group, GIGA Research Center, University of Liège, 4000 Liège, Belgium;
- Division of Respirology, Department of Pediatrics, University Hospital Liège, 4000 Liège, Belgium
| |
Collapse
|
15
|
Ancel J, Belgacemi R, Diabasana Z, Perotin JM, Bonnomet A, Dewolf M, Launois C, Mulette P, Deslée G, Polette M, Dormoy V. Impaired Ciliary Beat Frequency and Ciliogenesis Alteration during Airway Epithelial Cell Differentiation in COPD. Diagnostics (Basel) 2021; 11:diagnostics11091579. [PMID: 34573921 PMCID: PMC8469815 DOI: 10.3390/diagnostics11091579] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 08/25/2021] [Accepted: 08/27/2021] [Indexed: 12/19/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a frequent respiratory disease. However, its pathophysiology remains partially elucidated. Epithelial remodeling including alteration of the cilium is a major hallmark of COPD, but specific assessments of the cilium have been rarely investigated as a diagnostic tool in COPD. Here we explore the dysregulation of the ciliary function (ciliary beat frequency (CBF)) and differentiation (multiciliated cells formation in air-liquid interface cultures) of bronchial epithelial cells from COPD (n = 17) and non-COPD patients (n = 15). CBF was decreased by 30% in COPD (11.15 +/- 3.37 Hz vs. 7.89 +/- 3.39 Hz, p = 0.037). Ciliary differentiation was altered during airway epithelial cell differentiation from COPD patients. While the number of multiciliated cells decreased (p < 0.005), the number of primary ciliated cells increased (p < 0.05) and primary cilia were shorter (p < 0.05). Altogether, we demonstrate that COPD can be considered as a ciliopathy through both primary non-motile cilia modifications (related to airway epithelial cell repair and remodeling) and motile cilia function impairment (associated with decrease sputum clearance and clinical respiratory symptoms). These observations encourage considering cilia-associated features in the complex COPD physiopathology and highlight the potential of cilia-derived biomarkers for diagnosis.
Collapse
Affiliation(s)
- Julien Ancel
- Inserm UMR-S1250, P3Cell, Université de Reims Champagne Ardenne, SFR CAP-SANTE, 51092 Reims, France; (J.A.); (R.B.); (Z.D.); (J.-M.P.); (A.B.); (P.M.); (G.D.); (M.P.)
- Department of Respiratory Diseases, Centre Hospitalier Universitaire de Reims, Hôpital Maison Blanche, 51092 Reims, France; (M.D.); (C.L.)
| | - Randa Belgacemi
- Inserm UMR-S1250, P3Cell, Université de Reims Champagne Ardenne, SFR CAP-SANTE, 51092 Reims, France; (J.A.); (R.B.); (Z.D.); (J.-M.P.); (A.B.); (P.M.); (G.D.); (M.P.)
| | - Zania Diabasana
- Inserm UMR-S1250, P3Cell, Université de Reims Champagne Ardenne, SFR CAP-SANTE, 51092 Reims, France; (J.A.); (R.B.); (Z.D.); (J.-M.P.); (A.B.); (P.M.); (G.D.); (M.P.)
| | - Jeanne-Marie Perotin
- Inserm UMR-S1250, P3Cell, Université de Reims Champagne Ardenne, SFR CAP-SANTE, 51092 Reims, France; (J.A.); (R.B.); (Z.D.); (J.-M.P.); (A.B.); (P.M.); (G.D.); (M.P.)
- Department of Respiratory Diseases, Centre Hospitalier Universitaire de Reims, Hôpital Maison Blanche, 51092 Reims, France; (M.D.); (C.L.)
| | - Arnaud Bonnomet
- Inserm UMR-S1250, P3Cell, Université de Reims Champagne Ardenne, SFR CAP-SANTE, 51092 Reims, France; (J.A.); (R.B.); (Z.D.); (J.-M.P.); (A.B.); (P.M.); (G.D.); (M.P.)
- Platform of Cellular and Tissular Imaging (PICT), Université de Reims Champagne Ardenne, 51097 Reims, France
| | - Maxime Dewolf
- Department of Respiratory Diseases, Centre Hospitalier Universitaire de Reims, Hôpital Maison Blanche, 51092 Reims, France; (M.D.); (C.L.)
| | - Claire Launois
- Department of Respiratory Diseases, Centre Hospitalier Universitaire de Reims, Hôpital Maison Blanche, 51092 Reims, France; (M.D.); (C.L.)
| | - Pauline Mulette
- Inserm UMR-S1250, P3Cell, Université de Reims Champagne Ardenne, SFR CAP-SANTE, 51092 Reims, France; (J.A.); (R.B.); (Z.D.); (J.-M.P.); (A.B.); (P.M.); (G.D.); (M.P.)
- Department of Respiratory Diseases, Centre Hospitalier Universitaire de Reims, Hôpital Maison Blanche, 51092 Reims, France; (M.D.); (C.L.)
| | - Gaëtan Deslée
- Inserm UMR-S1250, P3Cell, Université de Reims Champagne Ardenne, SFR CAP-SANTE, 51092 Reims, France; (J.A.); (R.B.); (Z.D.); (J.-M.P.); (A.B.); (P.M.); (G.D.); (M.P.)
- Department of Respiratory Diseases, Centre Hospitalier Universitaire de Reims, Hôpital Maison Blanche, 51092 Reims, France; (M.D.); (C.L.)
| | - Myriam Polette
- Inserm UMR-S1250, P3Cell, Université de Reims Champagne Ardenne, SFR CAP-SANTE, 51092 Reims, France; (J.A.); (R.B.); (Z.D.); (J.-M.P.); (A.B.); (P.M.); (G.D.); (M.P.)
- Department of Biopathology, Centre Hospitalier Universitaire de Reims, Hôpital Maison Blanche, 51092 Reims, France
| | - Valérian Dormoy
- Inserm UMR-S1250, P3Cell, Université de Reims Champagne Ardenne, SFR CAP-SANTE, 51092 Reims, France; (J.A.); (R.B.); (Z.D.); (J.-M.P.); (A.B.); (P.M.); (G.D.); (M.P.)
- Correspondence:
| |
Collapse
|
16
|
Müller L, Savas ST, Tschanz SA, Stokes A, Escher A, Nussbaumer M, Bullo M, Kuehni CE, Blanchon S, Jung A, Regamey N, Haenni B, Schneiter M, Ingold J, Kieninger E, Casaulta C, Latzin P. A Comprehensive Approach for the Diagnosis of Primary Ciliary Dyskinesia-Experiences from the First 100 Patients of the PCD-UNIBE Diagnostic Center. Diagnostics (Basel) 2021; 11:1540. [PMID: 34573882 PMCID: PMC8466881 DOI: 10.3390/diagnostics11091540] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 08/13/2021] [Accepted: 08/17/2021] [Indexed: 11/17/2022] Open
Abstract
Primary ciliary dyskinesia (PCD) is a rare genetic disease characterized by dyskinetic cilia. Respiratory symptoms usually start at birth. The lack of diagnostic gold standard tests is challenging, as PCD diagnostics requires different methods with high expertise. We founded PCD-UNIBE as the first comprehensive PCD diagnostic center in Switzerland. Our diagnostic approach includes nasal brushing and cell culture with analysis of ciliary motility via high-speed-videomicroscopy (HSVM) and immunofluorescence labeling (IF) of structural proteins. Selected patients undergo electron microscopy (TEM) of ciliary ultrastructure and genetics. We report here on the first 100 patients assessed by PCD-UNIBE. All patients received HSVM fresh, IF, and cell culture (success rate of 90%). We repeated the HSVM with cell cultures and conducted TEM in 30 patients and genetics in 31 patients. Results from cell cultures were much clearer compared to fresh samples. For 80 patients, we found no evidence of PCD, 17 were diagnosed with PCD, two remained inconclusive, and one case is ongoing. HSVM was diagnostic in 12, IF in 14, TEM in five and genetics in 11 cases. None of the methods was able to diagnose all 17 PCD cases, highlighting that a comprehensive approach is essential for an accurate diagnosis of PCD.
Collapse
Affiliation(s)
- Loretta Müller
- Division of Paediatric Respiratory Medicine and Allergology, Department of Paediatrics, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; (S.T.S.); (A.S.); (A.E.); (M.N.); (M.B.); (C.E.K.); (E.K.); (C.C.); (P.L.)
- Department of BioMedical Research (DBMR), University of Bern, 3008 Bern, Switzerland
| | - Sibel T. Savas
- Division of Paediatric Respiratory Medicine and Allergology, Department of Paediatrics, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; (S.T.S.); (A.S.); (A.E.); (M.N.); (M.B.); (C.E.K.); (E.K.); (C.C.); (P.L.)
- Department of BioMedical Research (DBMR), University of Bern, 3008 Bern, Switzerland
| | - Stefan A. Tschanz
- Institute of Anatomy, University of Bern, 3012 Bern, Switzerland; (B.H.); (M.S.); (J.I.)
| | - Andrea Stokes
- Division of Paediatric Respiratory Medicine and Allergology, Department of Paediatrics, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; (S.T.S.); (A.S.); (A.E.); (M.N.); (M.B.); (C.E.K.); (E.K.); (C.C.); (P.L.)
- Department of BioMedical Research (DBMR), University of Bern, 3008 Bern, Switzerland
| | - Anaïs Escher
- Division of Paediatric Respiratory Medicine and Allergology, Department of Paediatrics, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; (S.T.S.); (A.S.); (A.E.); (M.N.); (M.B.); (C.E.K.); (E.K.); (C.C.); (P.L.)
- Department of BioMedical Research (DBMR), University of Bern, 3008 Bern, Switzerland
| | - Mirjam Nussbaumer
- Division of Paediatric Respiratory Medicine and Allergology, Department of Paediatrics, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; (S.T.S.); (A.S.); (A.E.); (M.N.); (M.B.); (C.E.K.); (E.K.); (C.C.); (P.L.)
- Department of BioMedical Research (DBMR), University of Bern, 3008 Bern, Switzerland
| | - Marina Bullo
- Division of Paediatric Respiratory Medicine and Allergology, Department of Paediatrics, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; (S.T.S.); (A.S.); (A.E.); (M.N.); (M.B.); (C.E.K.); (E.K.); (C.C.); (P.L.)
- Department of BioMedical Research (DBMR), University of Bern, 3008 Bern, Switzerland
| | - Claudia E. Kuehni
- Division of Paediatric Respiratory Medicine and Allergology, Department of Paediatrics, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; (S.T.S.); (A.S.); (A.E.); (M.N.); (M.B.); (C.E.K.); (E.K.); (C.C.); (P.L.)
- Institute of Social and Preventive Medicine, University of Bern, 3012 Bern, Switzerland
| | - Sylvain Blanchon
- Pediatric Pulmonology and Cystic Fibrosis Unit, Service of Pediatrics, Department Woman–Mother–Child, Lausanne University Hospital, University of Lausanne, 1011 Lausanne, Switzerland;
| | - Andreas Jung
- Division of Respiratory Medicine, University Children’s Hospital Zurich, 8032 Zurich, Switzerland;
| | - Nicolas Regamey
- Division of Paediatric Pulmonology, Children’s Hospital Lucerne, 6000 Lucerne, Switzerland;
| | - Beat Haenni
- Institute of Anatomy, University of Bern, 3012 Bern, Switzerland; (B.H.); (M.S.); (J.I.)
| | - Martin Schneiter
- Institute of Anatomy, University of Bern, 3012 Bern, Switzerland; (B.H.); (M.S.); (J.I.)
- Institute of Applied Physics, University of Bern, 3012 Bern, Switzerland
| | - Jonas Ingold
- Institute of Anatomy, University of Bern, 3012 Bern, Switzerland; (B.H.); (M.S.); (J.I.)
| | - Elisabeth Kieninger
- Division of Paediatric Respiratory Medicine and Allergology, Department of Paediatrics, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; (S.T.S.); (A.S.); (A.E.); (M.N.); (M.B.); (C.E.K.); (E.K.); (C.C.); (P.L.)
- Department of BioMedical Research (DBMR), University of Bern, 3008 Bern, Switzerland
| | - Carmen Casaulta
- Division of Paediatric Respiratory Medicine and Allergology, Department of Paediatrics, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; (S.T.S.); (A.S.); (A.E.); (M.N.); (M.B.); (C.E.K.); (E.K.); (C.C.); (P.L.)
- Department of BioMedical Research (DBMR), University of Bern, 3008 Bern, Switzerland
| | - Philipp Latzin
- Division of Paediatric Respiratory Medicine and Allergology, Department of Paediatrics, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; (S.T.S.); (A.S.); (A.E.); (M.N.); (M.B.); (C.E.K.); (E.K.); (C.C.); (P.L.)
- Department of BioMedical Research (DBMR), University of Bern, 3008 Bern, Switzerland
| | | |
Collapse
|
17
|
High-Speed Video Microscopy for Primary Ciliary Dyskinesia Diagnosis: A Study of Ciliary Motility Variations with Time and Temperature. Diagnostics (Basel) 2021; 11:diagnostics11071301. [PMID: 34359383 PMCID: PMC8305583 DOI: 10.3390/diagnostics11071301] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 07/14/2021] [Accepted: 07/16/2021] [Indexed: 11/28/2022] Open
Abstract
Primary ciliary dyskinesia (PCD) is a rare disease resulting from a defect in ciliary function that generates, among other issues, chronic upper and lower respiratory tract infections. European guidelines recommend studying ciliary function (pattern (CBP) and frequency (CBF)), together with characteristic clinical symptoms, as one of the definitive tests. However, there is no “gold standard”. The present study aims to use high-speed video microscopy to describe how CBF and CBP alter over time and at different temperatures to reduce the error rate in the diagnosis of PCD. Samples of nasal epithelium from 27 healthy volunteers were studied to assess CBF and CBP at 0, 3, 24, 48, and 72 h, at room temperature and 4 °C. It was observed that CBF increased while CBP became dyskinetic, both at room temperature and at 4 °C, as time passed, especially after 3 h. In order to preserve all ciliary function parameters and to perform a reliable analysis to improve the diagnostic process of PCD, analysis should be performed within the first 3 h of sample collection, preferably in reference centers.
Collapse
|
18
|
Zhao X, Bian C, Liu K, Xu W, Liu Y, Tian X, Bai J, Xu KF, Zhang X. Clinical characteristics and genetic spectrum of 26 individuals of Chinese origin with primary ciliary dyskinesia. Orphanet J Rare Dis 2021; 16:293. [PMID: 34210339 PMCID: PMC8252271 DOI: 10.1186/s13023-021-01840-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Accepted: 04/23/2021] [Indexed: 11/10/2022] Open
Abstract
Background Primary ciliary dyskinesia (PCD) is a rare, highly heterogeneous genetic disorder involving the impairment of motile cilia. With no single gold standard for PCD diagnosis and complicated multiorgan dysfunction, the diagnosis of PCD can be difficult in clinical settings. Some methods for diagnosis, such as nasal nitric oxide measurement and digital high-speed video microscopy with ciliary beat pattern analysis, can be expensive or unavailable. To confirm PCD diagnosis, we used a strategy combining assessment of typical symptoms with whole-exome sequencing (WES) and/or low-pass whole-genome sequencing (WGS) as an unbiased detection tool to identify known pathogenic mutations, novel variations, and copy number variations. Results A total of 26 individuals of Chinese origin with a confirmed PCD diagnosis aged 13 to 61 years (median age, 24.5 years) were included. Biallelic pathogenic mutations were identified in 19 of the 26 patients, including 8 recorded HGMD mutations and 24 novel mutations. The detection rate reached 73.1%. DNAH5 was the most frequently mutated gene, and c.8383C > T was the most common mutated variant, but it is relatively rare in PCD patients from other ethnic groups. Conclusion This study demonstrates the practical clinical utility of combining WES and low-pass WGS as a no-bias detecting tool in adult patients with PCD, showing a clinical characteristics and genetic spectrum of Chinese PCD patients. Supplementary Information The online version contains supplementary material available at 10.1186/s13023-021-01840-2.
Collapse
Affiliation(s)
- Xinyue Zhao
- McKusick-Zhang Center for Genetic Medicine, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100005, China
| | - Chun Bian
- Department of Pulmonary and Critical Care Medicine, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China
| | - Keqiang Liu
- McKusick-Zhang Center for Genetic Medicine, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100005, China
| | - Wenshuai Xu
- Department of Pulmonary and Critical Care Medicine, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China
| | - Yaping Liu
- McKusick-Zhang Center for Genetic Medicine, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100005, China.
| | - Xinlun Tian
- Department of Pulmonary and Critical Care Medicine, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China.
| | - Jing Bai
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Kai-Feng Xu
- Department of Pulmonary and Critical Care Medicine, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China
| | - Xue Zhang
- McKusick-Zhang Center for Genetic Medicine, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100005, China
| |
Collapse
|
19
|
Gower WA, Vece TJ. Pediatric pulmonology 2019 year in review: rare and diffuse lung disease. Pediatr Pulmonol 2021; 56:1324-1331. [PMID: 33559960 DOI: 10.1002/ppul.25297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 12/31/2020] [Accepted: 01/20/2021] [Indexed: 11/07/2022]
Abstract
Pediatric Pulmonology publishes original research, review articles, and case reports on topics related to a wide range of children's respiratory disorders. Here we review manuscripts published in 2019 in this journal and others on (1) anatomic lung, airway, and vascular malformations, (2) children's interstitial lung disease, and (3) primary ciliary dyskinesia and non-cystic fibrosis bronchiectasis.
Collapse
Affiliation(s)
- William A Gower
- Division of Pediatric Pulmonology, Program for Rare and Interstitial Lung Disease, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| | - Timothy J Vece
- Division of Pediatric Pulmonology, Program for Rare and Interstitial Lung Disease, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| |
Collapse
|
20
|
Ma Y, Tian P, Zhong H, Wu F, Zhang Q, Liu X, Dang H, Chen Q, Zou H, Zheng Y. WDPCP Modulates Cilia Beating Through the MAPK/ERK Pathway in Chronic Rhinosinusitis With Nasal Polyps. Front Cell Dev Biol 2021; 8:630340. [PMID: 33598458 PMCID: PMC7882705 DOI: 10.3389/fcell.2020.630340] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 12/31/2020] [Indexed: 01/26/2023] Open
Abstract
Cilia loss and dysfunction is one of the typical pathological features of chronic rhinosinusitis with nasal polyps (CRSwNP). Tryptophan-aspartic acid (W-D) repeat containing planar cell polarity effector (WDPCP) has been proven to be an essential element for ciliogenesis in human nasal epithelium, but its role in the beating of cilia remains unclear. In this study, we sought to investigate the role of WDPCP and its underlying mechanism behind the dysfunction in the beating of cilia in nasal polyp tissue. We demonstrated WDPCP expression in the epithelium of nasal polyps. We also investigated the MAPK/ERK pathway in primary human sinonasal epithelial cells to explore the function of WDPCP. The air–liquid interface culture system was used as a model to verify the role of WDPCP and the MAPK/ERK pathway in the beating of cilia. With the dysfunction of cilia beating, we observed a low expression of WDPCP in the epithelium of nasal polyp tissues. Within the in vitro study, we found that WDPCP was critical for mitochondrial biogenesis and mitochondrial function in human sinonasal epithelial cells, possibly due to the activation of the MAPK/ERK pathway. The mitochondrial dysfunction caused by U0126 or lacking WDPCP could be partially recovered by dexamethasone. The low expression of WDPCP in nasal epithelium could affect mitochondria via the MAPK/ERK pathway, which may contribute to the dysfunction in the beating of cilia in CRSwNP.
Collapse
Affiliation(s)
- Yun Ma
- Department of Otorhinolaryngology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Peng Tian
- Department of Otorhinolaryngology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Hua Zhong
- Department of Otorhinolaryngology, First Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, China
| | - Fan Wu
- Department of Otorhinolaryngology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Qining Zhang
- Department of Otorhinolaryngology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xiang Liu
- Department of Otorhinolaryngology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Hua Dang
- Department of Otorhinolaryngology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Qiujian Chen
- Department of Otorhinolaryngology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Hua Zou
- Department of Otorhinolaryngology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yiqing Zheng
- Department of Otorhinolaryngology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| |
Collapse
|
21
|
G M Al-Allaff R, M Y Al-Taee S, T D Baker S. Some Immunological Impacts of Face Mask Usage During the COVID-19 Pandemic. Pak J Biol Sci 2021; 24:920-927. [PMID: 34585544 DOI: 10.3923/pjbs.2021.920.927] [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] [Indexed: 06/13/2023]
Abstract
<b>Background and Objective:</b> COVID-19 is a fast-spreading worldwide pandemic caused by SARS-CoV-2. The World Health Organization recommended wearing face masks. Masks have become an urgent necessity throughout the pandemic, the study's goal was to track the impact of wearing masks on immunological responses. <b>Materials and Methods:</b> This study was conducted on 40 healthy people who were working in health care at Nineveh Governorate Hospitals from September-December, 2020. They wore face masks at work for more than 8 months for an average of 6 hrs a day. The control sample included 40 healthy individuals, who wore masks for very short periods. All samples underwent immunological and physiological tests to research the effects of wearing masks for extended periods within these parameters. <b>Results:</b> The results showed a significant decrease in total White Blood Count and the absolute number of neutrophils, lymphocytes, monocytes and phagocytic activity. However, there was a significant increase in the absolute number of eosinophils in participants compared with the control. The results also suggested there were no significant differences in IgE, haemoglobin concentration and blood O<sub>2 </sub>saturation in participants who wore masks for more than 6 hrs compared to the control group. The results showed a significant increase in pulse rate in participants who wore masks for more than 6 hrs compared to the control group. The results also showed a strong correlation coefficient between the time of wearing masks and some immunological, haematological parameters. <b>Conclusion:</b> Wearing masks for long periods alters immunological parameters that initiate the immune response, making the body weaker in its resistance to infectious agents.
Collapse
|
22
|
Immunofluorescence Analysis as a Diagnostic Tool in a Spanish Cohort of Patients with Suspected Primary Ciliary Dyskinesia. J Clin Med 2020; 9:jcm9113603. [PMID: 33182294 PMCID: PMC7695268 DOI: 10.3390/jcm9113603] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/05/2020] [Accepted: 11/06/2020] [Indexed: 12/16/2022] Open
Abstract
Primary ciliary dyskinesia (PCD) is an autosomal recessive rare disease caused by an alteration of ciliary structure. Immunofluorescence, consisting in the detection of the presence and distribution of cilia proteins in human respiratory cells by fluorescence, has been recently proposed as a technique to improve understanding of disease-causing genes and diagnosis rate in PCD. The objective of this study is to determine the accuracy of a panel of four fluorescently labeled antibodies (DNAH5, DNALI1, GAS8 and RSPH4A or RSPH9) as a PCD diagnostic tool in the absence of transmission electron microscopy analysis. The panel was tested in nasal brushing samples of 74 patients with clinical suspicion of PCD. Sixty-eight (91.9%) patients were evaluable for all tested antibodies. Thirty-three cases (44.6%) presented an absence or mislocation of protein in the ciliary axoneme (15 absent and 3 proximal distribution of DNAH5 in the ciliary axoneme, 3 absent DNAH5 and DNALI1, 7 absent DNALI1 and cytoplasmatic localization of GAS8, 1 absent GAS8, 3 absent RSPH9 and 1 absent RSPH4A). Fifteen patients had confirmed or highly likely PCD but normal immunofluorescence results (68.8% sensitivity and 100% specificity). In conclusion, immunofluorescence analysis is a quick, available, low-cost and reliable diagnostic test for PCD, although it cannot be used as a standalone test.
Collapse
|
23
|
Chandrasekaran B, Fernandes S. "Exercise with facemask; Are we handling a devil's sword?" - A physiological hypothesis. Med Hypotheses 2020; 144:110002. [PMID: 32590322 PMCID: PMC7306735 DOI: 10.1016/j.mehy.2020.110002] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 06/14/2020] [Indexed: 12/11/2022]
Abstract
The study demonstrates potential complications associated with facemasks during exercises. N95 respirators induces acidic environment which in turn affects the immune and metabolic systems. Facemasks during exercise may exacerbate the pathology of underlying chronic diseases. Further depression, anxiety induced by poor oxygenation and vasodilatory status when exercising with facemasks. The social exercisers should socially distance during exercise rather than wearing masks.
Straying away from a sedentary lifestyle is essential, especially in these troubled times of a global pandemic to reverse the ill effects associated with the health risks as mentioned earlier. In the view of anticipated effects on immune system and prevention against influenza and Covid-19, globally moderate to vigorous exercises are advocated wearing protective equipment such as facemasks. Though WHO supports facemasks only for Covid-19 patients, healthy “social exercisers” too exercise strenuously with customized facemasks or N95 which hypothesized to pose more significant health risks and tax various physiological systems especially pulmonary, circulatory and immune systems. Exercising with facemasks may reduce available Oxygen and increase air trapping preventing substantial carbon dioxide exchange. The hypercapnic hypoxia may potentially increase acidic environment, cardiac overload, anaerobic metabolism and renal overload, which may substantially aggravate the underlying pathology of established chronic diseases. Further contrary to the earlier thought, no evidence exists to claim the facemasks during exercise offer additional protection from the droplet transfer of the virus. Hence, we recommend social distancing is better than facemasks during exercise and optimal utilization rather than exploitation of facemasks during exercise.
Collapse
Affiliation(s)
- Baskaran Chandrasekaran
- Department of Exercise and Sports Sciences, Manipal College of Health Professions, Manipal Academy of Higher Education, India.
| | - Shifra Fernandes
- Department of Exercise and Sports Sciences, Manipal College of Health Professions, Manipal Academy of Higher Education, India.
| |
Collapse
|
24
|
Yasuda M, Inui TA, Hirano S, Asano S, Okazaki T, Inui T, Marunaka Y, Nakahari T. Intracellular Cl - Regulation of Ciliary Beating in Ciliated Human Nasal Epithelial Cells: Frequency and Distance of Ciliary Beating Observed by High-Speed Video Microscopy. Int J Mol Sci 2020; 21:ijms21114052. [PMID: 32517062 PMCID: PMC7312665 DOI: 10.3390/ijms21114052] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 05/28/2020] [Accepted: 06/03/2020] [Indexed: 12/12/2022] Open
Abstract
Small inhaled particles, which are entrapped by the mucous layer that is maintained by mucous secretion via mucin exocytosis and fluid secretion, are removed from the nasal cavity by beating cilia. The functional activities of beating cilia are assessed by their frequency and the amplitude. Nasal ciliary beating is controlled by intracellular ions (Ca2+, H+ and Cl-), and is enhanced by a decreased concentration of intracellular Cl- ([Cl-]i) in ciliated human nasal epithelial cells (cHNECs) in primary culture, which increases the ciliary beat amplitude. A novel method to measure both ciliary beat frequency (CBF) and ciliary beat distance (CBD, an index of ciliary beat amplitude) in cHNECs has been developed using high-speed video microscopy, which revealed that a decrease in [Cl-]i increased CBD, but not CBF, and an increase in [Cl-]i decreased both CBD and CBF. Thus, [Cl-]i inhibits ciliary beating in cHNECs, suggesting that axonemal structures controlling CBD and CBF may have Cl- sensors and be regulated by [Cl-]i. These observations indicate that the activation of Cl- secretion stimulates ciliary beating (increased CBD) mediated via a decrease in [Cl-]i in cHNECs. Thus, [Cl-]i is critical for controlling ciliary beating in cHNECs. This review introduces the concept of Cl- regulation of ciliary beating in cHNECs.
Collapse
Affiliation(s)
- Makoto Yasuda
- Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan; (T.-a.I.); (S.H.)
- Correspondence: (M.Y.); (T.N.); Tel.: +81-75-251-5603 (M.Y.); +81-77-561-3488 (ext. 7554) (T.N.)
| | - Taka-aki Inui
- Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan; (T.-a.I.); (S.H.)
| | - Shigeru Hirano
- Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan; (T.-a.I.); (S.H.)
| | - Shinji Asano
- Research Unit for Epithelial Physiology, Research Organization of Science and Technology, BKC, Ritsumeikan University, Kusatsu 525-8577, Japan; (S.A.); (T.I.); (Y.M.)
- Department of Molecular Physiology, Faculty of Pharmaceutical Sciences, BKC, Ritsumeikan University, Kusatsu 525-8577, Japan;
| | - Tomonori Okazaki
- Department of Molecular Physiology, Faculty of Pharmaceutical Sciences, BKC, Ritsumeikan University, Kusatsu 525-8577, Japan;
| | - Toshio Inui
- Research Unit for Epithelial Physiology, Research Organization of Science and Technology, BKC, Ritsumeikan University, Kusatsu 525-8577, Japan; (S.A.); (T.I.); (Y.M.)
- Saisei Mirai Clinics, Moriguchi 570-0012, Japan
| | - Yoshinori Marunaka
- Research Unit for Epithelial Physiology, Research Organization of Science and Technology, BKC, Ritsumeikan University, Kusatsu 525-8577, Japan; (S.A.); (T.I.); (Y.M.)
- Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan
- Research Institute for Clinical Physiology, Kyoto Industrial Health Association, Kyoto 604-8472, Japan
| | - Takashi Nakahari
- Research Unit for Epithelial Physiology, Research Organization of Science and Technology, BKC, Ritsumeikan University, Kusatsu 525-8577, Japan; (S.A.); (T.I.); (Y.M.)
- Correspondence: (M.Y.); (T.N.); Tel.: +81-75-251-5603 (M.Y.); +81-77-561-3488 (ext. 7554) (T.N.)
| |
Collapse
|