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Ciliary dyskinesia

Gen Kano, Hisashi Tsujii, Kazuhiko Takeuchi, Kaname Nakatani, Makoto Ikejiri, Satoru Ogawa, Hisami Kubo, Mizuho Nagao, Takao Fujisawa
Primary ciliary dyskinesia (PCD) is a rare genetic disorder caused by structural and/or functional impairment of cilia throughout the whole body. Early diagnosis of PCD is important for the prevention of long‑term sequelae, however early diagnosis is a challenge due to the phenotypic heterogeneity of PCD. In the current study, the patient with PCD was diagnosed at nine years old following several efforts to control intractable airway symptoms. The patient experienced a chronic productive cough beginning in early childhood and had multiple episodes of pneumonia and otitis media with effusion and sinusitis...
October 21, 2016: Molecular Medicine Reports
Celine Kempeneers, Claire Seaton, Mark A Chilvers
BACKGROUND: Digital high speed videomicroscopy(DHSV) allows analysis of ciliary beat frequency(CBF) and pattern(CBP) of respiratory cilia in 3 planes. Normal reference data use a sideways edge to evaluate ciliary dyskinesia, and calculate CBF using the time for a cilium to complete 10 beat cycles. Variability in CBF within respiratory epithelium has been described, but data concerning variation of CBP is limited in healthy epithelium. This study aims to document variability of CBP within normal samples, to compare ciliary function in 3 profiles, and CBF calculated over 5 or 10 beat cycles...
September 29, 2016: Chest
Revital Abitbul, Israel Amirav, Hannah Blau, Soliman Alkrinawi, Micha Aviram, David Shoseyov, Lea Bentur, Avraham Avital, Chaim Springer, Moran Lavie, Dario Prais, Husein Dabbah, Nael Elias, Arnon Elizur, Shmuel Goldberg, Avigdor Hevroni, Eitan Kerem, Anthony Luder, Yehudah Roth, Malena Cohen-Cymberknoh, Marta Ben Ami, Avigdor Mandelberg, Galit Livnat, Elie Picard, Joseph Rivlin, Moshe Rotschild, Ruth Soferman, Niki T Loges, Heike Olbrich, Claudius Werner, Alexander Wolter, Martina Herting, Julia Wallmeier, Johanna Raidt, Heymut Omran, Huda Mussaffi
BACKGROUND: Primary Ciliary Dyskinesia (PCD) is rare and its features in Israel have not been described. AIMS: to assess prevalence utilizing state-of-the-art diagnostic techniques, and describe clinical features, diagnostic and management practices in Israel. METHODS: A national multicenter study from 2012 to 2013 recruited patients diagnosed or suspected of having PCD. Diagnosis was verified using: nasal Nitric Oxide (nNO); High-speed Video Microscope Analysis (HVMA); Transmission Electron Microscopy (TEM) of cilia; Immuno-fluorescence staining (IF) for ciliary proteins, and genetic analysis...
October 2016: Respiratory Medicine
Irina Sedykh, Jessica J TeSlaa, Rose L Tatarsky, Abigail N Keller, Kimberly A Toops, Aparna Lakkaraju, Molly K Nyholm, Marc A Wolman, Yevgenya Grinblat
Cilia are cell surface organelles with key roles in a range of cellular processes, including generation of fluid flow by motile cilia. The axonemes of motile cilia and immotile kinocilia contain 9 peripheral microtubule doublets, a central microtubule pair, and 9 connecting radial spokes. Aberrant radial spoke components RSPH1, 3, 4a and 9 have been linked with primary ciliary dyskinesia (PCD), a disorder characterized by ciliary dysmotility; yet, radial spoke functions remain unclear. Here we show that zebrafish Rsph9 is expressed in cells bearing motile cilia and kinocilia, and localizes to both 9 + 2 and 9 + 0 ciliary axonemes...
September 30, 2016: Scientific Reports
Eleonora Dehlink, Claire Hogg, Siobhan B Carr, Andrew Bush
INTRODUCTION: Primary ciliary dyskinesia (PCD) is a rare, mostly autosomal-recessive disorder of motile cilia, characterized by chronic lung disease, rhinosinusitis, hearing impairment, and subfertility. PCD is still often missed or diagnosed late since symptoms overlap with common respiratory complaints, but should be considered if one or more of the cardinal clues are present. AREAS COVERED: We provide an overview on clinical presentations of PCD and clues for when to consider PCD, these include unexplained neonatal respiratory distress, persistent rhinitis from the first days of life, situs anomalies, or otorrhoea following tympanostomy tube insertion...
September 28, 2016: Expert Review of Respiratory Medicine
Francesca Boaretto, Deborah Snijders, Cecilia Salvoro, Ambra Spalletta, Maria Luisa Mostacciuolo, Mirella Collura, Salvatore Cazzato, Donatella Girosi, Michela Silvestri, Giovanni Arturo Rossi, Angelo Barbato, Giovanni Vazza
Primary ciliary dyskinesia (PCD) is a rare genetic disorder that alters mucociliary clearance, with consequent chronic disease of upper and lower airways. Diagnosis of PCD is challenging, and genetic testing is hampered by the high heterogeneity of the disease, because autosomal recessive causative mutations were found in 34 different genes. In this study, we clinically and molecularly characterized a cohort of 51 Italian patients with clinical signs of PCD. A custom next-generation sequencing panel that enables the affordable and simultaneous screening of 24 PCD genes was developed for genetic analysis...
September 13, 2016: Journal of Molecular Diagnostics: JMD
Tobias Nicolai Andersen, Mikkel Christian Alanin, Christian von Buchwald, Lars Holme Nielsen
INTRODUCTION: Primary ciliary dyskinesia (PCD) is an autosomal recessive genetic disease, which primarily manifests with oto-sino-pulmonary symptoms. Otitis media with effusion (OME) is common from early childhood. The existing literature on OME management in PCD is conflicting. The goals of the present study were firstly to evaluate the long-term hearing in PCD patients and secondly to determine the influence of ventilation tube (VT) insertion on hearing and postoperative otorrhoea. METHODS: A longitudinal retrospective study extracting the hearing level (pure tone average (0...
October 2016: International Journal of Pediatric Otorhinolaryngology
Zuzanna Bukowy-Bieryllo, Maciej Dabrowski, Michał Witt, Ewa Zietkiewicz
Translational readthrough of premature termination codons (PTCs) induced by pharmacological compounds has proven to be an effective way of restoring functional protein expression and reducing symptoms in several genetic disorders. We tested the potential of different concentrations of several aminoglycosides (AAGs) for promoting PTC-readthrough in 5 genes involved in the pathogenesis of primary ciliary dyskinesia, an inherited disorder caused by the dysfunction of motile cilia and flagella. The efficiency of readthrough stimulation of PTCs cloned in dual reporter vectors was examined in 2 experimental settings: in vitro (transcription/translation system) and ex vivo (transiently transfected epithelial cell line)...
August 12, 2016: RNA Biology
Matthias Griese, Gerhard Scheuch
Treatment with exogenous alpha-1 antitrypsin (AAT), a potent serine protease inhibitor, was developed originally for chronic obstructive pulmonary disease associated with AAT deficiency; however, other lung conditions involving neutrophilic inflammation and proteolytic tissue injury related to neutrophil elastase and other serine proteases may also be considered for AAT therapy. These conditions include bronchiectasis caused by primary ciliary dyskinesia, cystic fibrosis, and other diseases associated with an increased free elastase activity in the airways...
August 2016: Annals of the American Thoracic Society
Michael R Knowles, Maimoona Zariwala, Margaret Leigh
Primary ciliary dyskinesia (PCD) is a recessive genetically heterogeneous disorder of motile cilia with chronic otosinopulmonary disease and organ laterality defects in ∼50% of cases. The prevalence of PCD is difficult to determine. Recent diagnostic advances through measurement of nasal nitric oxide and genetic testing has allowed rigorous diagnoses and determination of a robust clinical phenotype, which includes neonatal respiratory distress, daily nasal congestion, and wet cough starting early in life, along with organ laterality defects...
September 2016: Clinics in Chest Medicine
Laura Behan, Audrey Dunn Galvin, Bruna Rubbo, Sarah Masefield, Fiona Copeland, Michele Manion, Bernhard Rindlisbacher, Beatrice Redfern, Jane S Lucas
Primary ciliary dyskinesia (PCD) is a rare genetic disorder characterised by progressive sino-pulmonary disease, with symptoms starting soon after birth. A European Respiratory Society (ERS) Task Force aims to address disparities in diagnostics across Europe by providing evidence-based clinical practice guidelines. We aimed to identify challenges faced by patients when referred for PCD diagnostic testing.A patient survey was developed by patient representatives and healthcare specialists to capture experience...
October 2016: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
Myrofora Goutaki, Anna Bettina Meier, Florian S Halbeisen, Jane S Lucas, Sharon D Dell, Elisabeth Maurer, Carmen Casaulta, Maja Jurca, Ben D Spycher, Claudia E Kuehni
Few original studies have described the prevalence and severity of clinical symptoms of primary ciliary dyskinesia (PCD). This systematic review and meta-analysis aimed to identify all published studies on clinical manifestations of PCD patients, and to describe their prevalence and severity stratified by age and sex.We searched PubMed, Embase and Scopus for studies describing clinical symptoms of ≥10 patients with PCD. We performed meta-analyses and meta-regression to explain heterogeneity.We included 52 studies describing a total of 1970 patients (range 10-168 per study)...
October 2016: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
Elma El Khouri, Lucie Thomas, Ludovic Jeanson, Emilie Bequignon, Benoit Vallette, Philippe Duquesnoy, Guy Montantin, Bruno Copin, Florence Dastot-Le Moal, Sylvain Blanchon, Jean François Papon, Patrick Lorès, Li Yuan, Nathalie Collot, Sylvie Tissier, Catherine Faucon, Gérard Gacon, Catherine Patrat, Jean Philippe Wolf, Emmanuel Dulioust, Bruno Crestani, Estelle Escudier, André Coste, Marie Legendre, Aminata Touré, Serge Amselem
Primary ciliary dyskinesia (PCD) is an autosomal-recessive disease due to functional or ultra-structural defects of motile cilia. Affected individuals display recurrent respiratory-tract infections; most males are infertile as a result of sperm flagellar dysfunction. The great majority of the PCD-associated genes identified so far encode either components of dynein arms (DAs), which are multiprotein-ATPase complexes essential for ciliary motility, or proteins involved in DA assembly. To identify the molecular basis of a PCD phenotype characterized by central complex (CC) defects but normal DA structure, a phenotype found in ∼15% of cases, we performed whole-exome sequencing in a male individual with PCD and unexplained CC defects...
August 4, 2016: American Journal of Human Genetics
Julia Wallmeier, Hidetaka Shiratori, Gerard W Dougherty, Christine Edelbusch, Rim Hjeij, Niki T Loges, Tabea Menchen, Heike Olbrich, Petra Pennekamp, Johanna Raidt, Claudius Werner, Katsura Minegishi, Kyosuke Shinohara, Yasuko Asai, Katsuyoshi Takaoka, Chanjae Lee, Matthias Griese, Yasin Memari, Richard Durbin, Anja Kolb-Kokocinski, Sascha Sauer, John B Wallingford, Hiroshi Hamada, Heymut Omran
Multiprotein complexes referred to as outer dynein arms (ODAs) develop the main mechanical force to generate the ciliary and flagellar beat. ODA defects are the most common cause of primary ciliary dyskinesia (PCD), a congenital disorder of ciliary beating, characterized by recurrent infections of the upper and lower airways, as well as by progressive lung failure and randomization of left-right body asymmetry. Using a whole-exome sequencing approach, we identified recessive loss-of-function mutations within TTC25 in three individuals from two unrelated families affected by PCD...
August 4, 2016: American Journal of Human Genetics
Claudia E Kuehni, Myrofora Goutaki, Mary Carroll, Jane S Lucas
No abstract text is available yet for this article.
August 2016: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
Wesley R Lewis, Erik B Malarkey, Douglas Tritschler, Raqual Bower, Raymond C Pasek, Jonathan D Porath, Susan E Birket, Sophie Saunier, Corinne Antignac, Michael R Knowles, Margaret W Leigh, Maimoona A Zariwala, Anil K Challa, Robert A Kesterson, Steven M Rowe, Iain A Drummond, John M Parant, Friedhelm Hildebrandt, Mary E Porter, Bradley K Yoder, Nicolas F Berbari
Ciliopathies are genetic disorders arising from dysfunction of microtubule-based cellular appendages called cilia. Different cilia types possess distinct stereotypic microtubule doublet arrangements with non-motile or 'primary' cilia having a 9+0 and motile cilia have a 9+2 array of microtubule doublets. Primary cilia are critical sensory and signaling centers needed for normal mammalian development. Defects in their structure/function result in a spectrum of clinical and developmental pathologies including abnormal neural tube and limb patterning...
July 2016: PLoS Genetics
Sharon D Dell, Margaret W Leigh, Jane S Lucas, Thomas W Ferkol, Michael R Knowles, Adrianne Alpern, Laura Behan, Anjana M Morris, Claire Hogg, Audrey DunnGalvin, Alexandra L Quittner
RATIONALE: Primary ciliary dyskinesia (PCD) is a rare disease. There are no available data on disease-specific pediatric patient-reported outcomes. OBJECTIVES: Our objective was to create developmentally appropriate, health-related quality-of-life questionnaires (QOL-PCD) for children (6-12 yr) and adolescents (13-17 yr) with PCD and a parent proxy measure. METHODS: The QOL-PCD was developed using a cross-cultural protocol-driven approach satisfying both North American and European drug regulatory agency guidelines...
October 2016: Annals of the American Thoracic Society
Helene E Kobbernagel, Frederik F Buchvald, Eric G Haarman, Carmen Casaulta, Samuel A Collins, Claire Hogg, Claudia E Kuehni, Jane S Lucas, Heymut Omran, Alexandra L Quittner, Claudius Werner, Kim G Nielsen
BACKGROUND: Clinical management of primary ciliary dyskinesia (PCD) respiratory disease is currently based on improving mucociliary clearance and controlling respiratory infections, through the administration of antibiotics. Treatment practices in PCD are largely extrapolated from more common chronic respiratory disorders, particularly cystic fibrosis, but no randomized controlled trials (RCT) have ever evaluated efficacy and safety of any pharmacotherapeutics used in the treatment of PCD...
2016: BMC Pulmonary Medicine
A Livraghi-Butrico, B R Grubb, K J Wilkinson, A S Volmer, K A Burns, C M Evans, W K O'Neal, R C Boucher
Airway diseases, including cigarette smoke-induced chronic bronchitis, cystic fibrosis, and primary ciliary dyskinesia are associated with decreased mucociliary clearance (MCC). However, it is not known whether a simple reduction in MCC or concentration-dependent mucus adhesion to airway surfaces dominates disease pathogenesis or whether decreasing the concentration of secreted mucins may be therapeutic. To address these questions, Scnn1b-Tg mice, which exhibit airway mucus dehydration/adhesion, were compared and crossed with Muc5b- and Muc5ac-deficient mice...
July 20, 2016: Mucosal Immunology
Justine Frija-Masson, Laurence Bassinet, Isabelle Honoré, Nadine Dufeu, Bruno Housset, André Coste, Jean Francois Papon, Estelle Escudier, Pierre-Régis Burgel, Bernard Maître
INTRODUCTION: Primary ciliary dyskinesia (PCD) is a genetic disease characterised by abnormalities in ciliary function, responsible for chronic pulmonary and sinonasal diseases. Adult clinical features and outcome are poorly described. OBJECTIVES: To assess the clinical characteristics and disease progression in adults with PCD. METHODS: Bicentric retrospective study, focusing on adults (≥18 years) with an asserted diagnosis of PCD based on the presence of bronchiectasis with typical ultrastructural defect of cilia and/or situs inversus (SI)...
July 5, 2016: Thorax
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