Abstract
Reduced generation of multiple motile cilia (RGMC) is a rare mucociliary clearance disorder. Affected persons suffer from recurrent infections of upper and lower airways because of highly reduced numbers of multiple motile respiratory cilia. Here we report recessive loss-of-function and missense mutations in MCIDAS-encoding Multicilin, which was shown to promote the early steps of multiciliated cell differentiation in Xenopus. MCIDAS mutant respiratory epithelial cells carry only one or two cilia per cell, which lack ciliary motility-related proteins (DNAH5; CCDC39) as seen in primary ciliary dyskinesia. Consistent with this finding, FOXJ1-regulating axonemal motor protein expression is absent in respiratory cells of MCIDAS mutant individuals. CCNO, when mutated known to cause RGMC, is also absent in MCIDAS mutant respiratory cells, consistent with its downstream activity. Thus, our findings identify Multicilin as a key regulator of CCNO/FOXJ1 for human multiciliated cell differentiation, and highlight the 5q11 region containing CCNO and MCIDAS as a locus underlying RGMC.
| Original language | English |
|---|---|
| Article number | 4418 |
| Journal | Nature Communications |
| Volume | 5 |
| DOIs | |
| State | Published - 22 Jul 2014 |
Bibliographical note
Publisher Copyright:© 2014 Macmillan Publishers Limited. All rights reserved.
Funding
We thank all the affected patients, their families and their care givers for the participation in the study. We are grateful for the help of the German patient support group ‘Kartagener Syndrom und Primaere Ciliaere Dyskinesie’. We thank Cordula Wester-mann, Cordula Vorspohl, Laura Overkamp, Martina Herting, Simone Helms, Valerie Vlaeminck and Franz-Josef Seesing for their technical assistance. We kindly thank Mitali Patel and Alexandros Onoufriadis for their work. H.M. acknowledges funding from Action Medical Research (GN2101) and the Milena Carvajal Pro-Kartagener Foundation. Work in H. Omran’s lab was funded by the Deutsche Forschungsgemeinschaft (DFG Om 6/4, DFG Om 6/5), by the Interdisziplinaeres Zentrum für Klinische Forschung (IZKF Om2/009/12) Muenster (H. Omran), by the European Community’s Seventh Framework Programme FP7/2009, under grant agreement 241955, SYSCILIA (H. Omran), and BESTCILIA, under grant agreement 305404 (H. Omran), the Schroeder Stiftung (H. Omran) and Kindness for Kids (H. Omran). Work reported here was also supported by grants 2011-R10150-003 (Koning Boudewijnstichting, Fonds Alphonse en Jean Forton), IWT O&O 100500 to H.C., and a NIH grant, GM096021, to C.K.
| Funders | Funder number |
|---|---|
| BESTCILIA | 305404 |
| Fonds Alphonse en Jean Forton | |
| Interdisziplinaeres Zentrum für Klinische Forschung | IZKF Om2/009/12 |
| Kindness for Kids | 2011-R10150-003 |
| Schroeder Stiftung | |
| National Institutes of Health | |
| National Institute of General Medical Sciences | R01GM096021 |
| Action Medical Research | GN2101 |
| Deutsche Forschungsgemeinschaft | Om 6/5, DFG Om 6/4 |
| Agentschap voor Innovatie door Wetenschap en Technologie | O&O 100500 |
| Fondation Milena Carvajal - Pro-Kartagener | |
| Seventh Framework Programme | 241955 |
| Koning Boudewijnstichting |