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Mapping the Most Common Founder Variant in RSPH9 That Causes Primary Ciliary Dyskinesia in Multiple Consanguineous Families of Bedouin Arabs

Introduction: Primary ciliary dyskinesia (PCD) is a congenital thoracic disorder caused by dysfunction of motile cilia, resulting in insufficient mucociliary clearance of the lungs. The overall aim of this study is to identify causative defective genes in PCD-affected individuals in the Kuwaiti popu...

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Autores principales: Al-Mutairi, Dalal A., Alsabah, Basel H., Pennekamp, Petra, Omran, Heymut
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10607267/
https://www.ncbi.nlm.nih.gov/pubmed/37892643
http://dx.doi.org/10.3390/jcm12206505
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author Al-Mutairi, Dalal A.
Alsabah, Basel H.
Pennekamp, Petra
Omran, Heymut
author_facet Al-Mutairi, Dalal A.
Alsabah, Basel H.
Pennekamp, Petra
Omran, Heymut
author_sort Al-Mutairi, Dalal A.
collection PubMed
description Introduction: Primary ciliary dyskinesia (PCD) is a congenital thoracic disorder caused by dysfunction of motile cilia, resulting in insufficient mucociliary clearance of the lungs. The overall aim of this study is to identify causative defective genes in PCD-affected individuals in the Kuwaiti population. Methods: A cohort of multiple consanguineous PCD families was identified from Kuwaiti patients and genomic DNA from the family members was isolated using standard procedures. The DNA samples from all affected individuals were analyzed by whole exome sequencing (WES). Transmission electron microscopy (TEM) and immunofluorescent analysis (IF) were performed on samples obtained by nasal brushings to identify specific structural abnormalities within ciliated cells. Results: Here, we present six multiplex families with 11 patients who all presented with typical PCD symptoms. Ten out of eleven patients inherited a 3 bp homozygous deletion of GAA in RSPH9, whereas the eleventh patients inherited this variant in trans with a frameshift deletion in RSPH9. Genetic results were confirmed by segregation analysis. The in-frame deletion of GAA in RSPH9 has previously been published as pathogenic in both annotated RSPH9 transcript variants (1 and 2). In contrast, the previously unpublished RSPH9 frameshift deletion identified in KU-15.IV2 impacts only RSPH9 transcript variant two. Regarding all 11 PCD individuals analyzed, IF results demonstrated absence of RSPH9 protein and TEM analysis showed the typical findings in RSPH9 mutant individuals. Conclusions: We present the largest cohort of PCD individuals affected by the founder in-frame deletion GAA in RSPH9. This founder variant is the most common PCD-causing variant in Bedouin Arabs in Kuwait.
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spelling pubmed-106072672023-10-28 Mapping the Most Common Founder Variant in RSPH9 That Causes Primary Ciliary Dyskinesia in Multiple Consanguineous Families of Bedouin Arabs Al-Mutairi, Dalal A. Alsabah, Basel H. Pennekamp, Petra Omran, Heymut J Clin Med Article Introduction: Primary ciliary dyskinesia (PCD) is a congenital thoracic disorder caused by dysfunction of motile cilia, resulting in insufficient mucociliary clearance of the lungs. The overall aim of this study is to identify causative defective genes in PCD-affected individuals in the Kuwaiti population. Methods: A cohort of multiple consanguineous PCD families was identified from Kuwaiti patients and genomic DNA from the family members was isolated using standard procedures. The DNA samples from all affected individuals were analyzed by whole exome sequencing (WES). Transmission electron microscopy (TEM) and immunofluorescent analysis (IF) were performed on samples obtained by nasal brushings to identify specific structural abnormalities within ciliated cells. Results: Here, we present six multiplex families with 11 patients who all presented with typical PCD symptoms. Ten out of eleven patients inherited a 3 bp homozygous deletion of GAA in RSPH9, whereas the eleventh patients inherited this variant in trans with a frameshift deletion in RSPH9. Genetic results were confirmed by segregation analysis. The in-frame deletion of GAA in RSPH9 has previously been published as pathogenic in both annotated RSPH9 transcript variants (1 and 2). In contrast, the previously unpublished RSPH9 frameshift deletion identified in KU-15.IV2 impacts only RSPH9 transcript variant two. Regarding all 11 PCD individuals analyzed, IF results demonstrated absence of RSPH9 protein and TEM analysis showed the typical findings in RSPH9 mutant individuals. Conclusions: We present the largest cohort of PCD individuals affected by the founder in-frame deletion GAA in RSPH9. This founder variant is the most common PCD-causing variant in Bedouin Arabs in Kuwait. MDPI 2023-10-13 /pmc/articles/PMC10607267/ /pubmed/37892643 http://dx.doi.org/10.3390/jcm12206505 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Al-Mutairi, Dalal A.
Alsabah, Basel H.
Pennekamp, Petra
Omran, Heymut
Mapping the Most Common Founder Variant in RSPH9 That Causes Primary Ciliary Dyskinesia in Multiple Consanguineous Families of Bedouin Arabs
title Mapping the Most Common Founder Variant in RSPH9 That Causes Primary Ciliary Dyskinesia in Multiple Consanguineous Families of Bedouin Arabs
title_full Mapping the Most Common Founder Variant in RSPH9 That Causes Primary Ciliary Dyskinesia in Multiple Consanguineous Families of Bedouin Arabs
title_fullStr Mapping the Most Common Founder Variant in RSPH9 That Causes Primary Ciliary Dyskinesia in Multiple Consanguineous Families of Bedouin Arabs
title_full_unstemmed Mapping the Most Common Founder Variant in RSPH9 That Causes Primary Ciliary Dyskinesia in Multiple Consanguineous Families of Bedouin Arabs
title_short Mapping the Most Common Founder Variant in RSPH9 That Causes Primary Ciliary Dyskinesia in Multiple Consanguineous Families of Bedouin Arabs
title_sort mapping the most common founder variant in rsph9 that causes primary ciliary dyskinesia in multiple consanguineous families of bedouin arabs
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10607267/
https://www.ncbi.nlm.nih.gov/pubmed/37892643
http://dx.doi.org/10.3390/jcm12206505
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