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van den Akker WMR, Brummelman I, Martis LM, Timmermans RN, Pfundt R, Kleefstra T, Willemsen MH, Gerkes EH, Herkert JC, van Essen AJ, Rump P, Vansenne F, Terhal PA, van Haelst MM, Cristian I, Turner CE, Cho MT, Begtrup A, Willaert R, Fassi E, van Gassen KLI, Stegmann APA, de Vries BBA, Schuurs-Hoeijmakers JHM. De novo variants in CDK13 associated with syndromic ID/DD: Molecular and clinical delineation of 15 individuals and a further review. Clin Genet 2019; 93:1000-1007. [PMID: 29393965 DOI: 10.1111/cge.13225] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 01/03/2018] [Accepted: 01/24/2018] [Indexed: 01/06/2023]
Abstract
De novo variants in the gene encoding cyclin-dependent kinase 13 (CDK13) have been associated with congenital heart defects and intellectual disability (ID). Here, we present the clinical assessment of 15 individuals and report novel de novo missense variants within the kinase domain of CDK13. Furthermore, we describe 2 nonsense variants and a recurrent frame-shift variant. We demonstrate the synthesis of 2 aberrant CDK13 transcripts in lymphoblastoid cells from an individual with a splice-site variant. Clinical characteristics of the individuals include mild to severe ID, developmental delay, behavioral problems, (neonatal) hypotonia and a variety of facial dysmorphism. Congenital heart defects were present in 2 individuals of the current cohort, but in at least 42% of all known individuals. An overview of all published cases is provided and does not demonstrate an obvious genotype-phenotype correlation, although 2 individuals harboring a stop codons at the end of the kinase domain might have a milder phenotype. Overall, there seems not to be a clinically recognizable facial appearance. The variability in the phenotypes impedes an à vue diagnosis of this syndrome and therefore genome-wide or gene-panel driven genetic testing is needed. Based on this overview, we provide suggestions for clinical work-up and management of this recently described ID syndrome.
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Affiliation(s)
- W M R van den Akker
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - I Brummelman
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - L M Martis
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - R N Timmermans
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - R Pfundt
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - T Kleefstra
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - M H Willemsen
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - E H Gerkes
- Department of Genetics, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - J C Herkert
- Department of Genetics, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - A J van Essen
- Department of Genetics, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - P Rump
- Department of Genetics, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - F Vansenne
- Department of Genetics, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - P A Terhal
- Department of Genetics, University Medical Centre Utrecht, Utrecht, The Netherlands
| | - M M van Haelst
- Department of Genetics, University Medical Centre Utrecht, Utrecht, The Netherlands.,Department of Clinical Genetics, AMC/VUmc, Amsterdam, The Netherlands
| | - I Cristian
- Division of Genetics and Metabolism, Department of Pediatrics, Nemours Children's Hospital Orlando, Orlando, Florida
| | - C E Turner
- Department of Genetics, Walter Reed National Military Medical Center, Bethesda, Maryland
| | - M T Cho
- GeneDx, Gaithersburg, Maryland
| | | | | | - E Fassi
- Division of Genetics and Genomic Medicine, Department of Pediatrics, Washington University School of Medicine, St Louis, Missouri
| | - K L I van Gassen
- Department of Genetics, University Medical Centre Utrecht, Utrecht, The Netherlands
| | - A P A Stegmann
- Department of Human Genetics, Maastricht University Hospital, Maastricht, The Netherlands
| | - B B A de Vries
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands
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van der Linde IHM, Hiemstra YL, Bökenkamp R, van Mil AM, Breuning MH, Ruivenkamp C, Ten Broeke SW, Veldkamp RF, van Waning JI, van Slegtenhorst MA, van Spaendonck-Zwarts KY, Lekanne Deprez RH, Herkert JC, Boven L, van der Zwaag PA, Jongbloed JDH, Bootsma M, Barge-Schaapveld DQCM. A Dutch MYH7 founder mutation, p.(Asn1918Lys), is associated with early onset cardiomyopathy and congenital heart defects. Neth Heart J 2017; 25:675-681. [PMID: 28864942 PMCID: PMC5691818 DOI: 10.1007/s12471-017-1037-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 08/22/2017] [Indexed: 02/07/2023] Open
Abstract
Background Mutations in the myosin heavy chain 7 (MYH7) gene commonly cause cardiomyopathy but are less frequently associated with congenital heart defects. Methods In this study, we describe a mutation in the MYH7 gene, c. 5754C > G; p. (Asn1918Lys), present in 15 probands and 65 family members. Results Of the 80 carriers (age range 0–88 years), 46 (57.5%) had cardiomyopathy (mainly dilated cardiomyopathy (DCM)) and seven (8.8%) had a congenital heart defect. Childhood onset of cardiomyopathy was present in almost 10% of carriers. However, in only a slight majority (53.7%) was the left ventricular ejection fraction reduced and almost no arrhythmias or conduction disorders were noted. Moreover, only one carrier required heart transplantation and nine (11.3%) an implantable cardioverter defibrillator. In addition, the standardised mortality ratio for MYH7 carriers was not significantly increased. Whole exome sequencing in several cases with paediatric onset of DCM and one with isolated congenital heart defects did not reveal additional known disease-causing variants. Haplotype analysis suggests that the MYH7 variant is a founder mutation, and is therefore the first Dutch founder mutation identified in the MYH7 gene. The mutation appears to have originated in the western region of the province of South Holland between 500 and 900 years ago. Conclusion Clinically, the p. (Asn1918Lys) mutation is associated with congenital heart defects and/or cardiomyopathy at young age but with a relatively benign course. Electronic supplementary material The online version of this article (10.1007/s12471-017-1037-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- I H M van der Linde
- Department of Clinical Genetics, Leiden University Medical Centre, Leiden, The Netherlands
| | - Y L Hiemstra
- Department of Cardiology, Leiden University Medical Centre, Leiden, The Netherlands
| | - R Bökenkamp
- Department of Paediatric Cardiology, Leiden University Medical Centre, Leiden, The Netherlands
| | - A M van Mil
- Department of Clinical Genetics, Leiden University Medical Centre, Leiden, The Netherlands
| | - M H Breuning
- Department of Clinical Genetics, Leiden University Medical Centre, Leiden, The Netherlands
| | - C Ruivenkamp
- Department of Clinical Genetics, Leiden University Medical Centre, Leiden, The Netherlands
| | - S W Ten Broeke
- Department of Clinical Genetics, Leiden University Medical Centre, Leiden, The Netherlands
| | - R F Veldkamp
- Department of Cardiology, Haaglanden Medical Centre, The Hague, The Netherlands
| | - J I van Waning
- Department of Clinical Genetics, Erasmus Medical Centre, Rotterdam, The Netherlands
| | - M A van Slegtenhorst
- Department of Clinical Genetics, Erasmus Medical Centre, Rotterdam, The Netherlands
| | | | - R H Lekanne Deprez
- Department of Clinical Genetics, Academic Medical Centre, Amsterdam, The Netherlands
| | - J C Herkert
- University Medical Centre Groningen, Department of Genetics, University of Groningen, Groningen, The Netherlands
| | - L Boven
- University Medical Centre Groningen, Department of Genetics, University of Groningen, Groningen, The Netherlands
| | - P A van der Zwaag
- University Medical Centre Groningen, Department of Genetics, University of Groningen, Groningen, The Netherlands
| | - J D H Jongbloed
- University Medical Centre Groningen, Department of Genetics, University of Groningen, Groningen, The Netherlands
| | - M Bootsma
- Department of Cardiology, Leiden University Medical Centre, Leiden, The Netherlands
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Roberts JD, Herkert JC, Rutberg J, Nikkel SM, Wiesfeld ACP, Dooijes D, Gow RM, van Tintelen JP, Gollob MH. Detection of genomic deletions ofPKP2in arrhythmogenic right ventricular cardiomyopathy. Clin Genet 2012; 83:452-6. [DOI: 10.1111/j.1399-0004.2012.01950.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Revised: 08/07/2012] [Accepted: 08/07/2012] [Indexed: 11/27/2022]
Affiliation(s)
- JD Roberts
- Inherited Arrhythmia Clinic and the Arrhythmia Research Laboratory; University of Ottawa Heart Institute; Ottawa; Ontario; Canada
| | - JC Herkert
- Department of Genetics, University Medical Center Groningen; University of Groningen; Groningen; the Netherlands
| | - J Rutberg
- Inherited Arrhythmia Clinic and the Arrhythmia Research Laboratory; University of Ottawa Heart Institute; Ottawa; Ontario; Canada
| | - SM Nikkel
- Department of Pediatrics, The Children's Hospital of Eastern Ontario; University of Ottawa; Ottawa; Ontario; Canada
| | - ACP Wiesfeld
- Department of Cardiology, University Medical Center Groningen; University of Groningen; Groningen; the Netherlands
| | - D Dooijes
- Department of Medical Genetics; University Medical Center Utrecht; Utrecht; the Netherlands
| | - RM Gow
- Division of Cardiology, Inherited Arrhythmia Clinic; The Childrens Hospital of Eastern Ontario; Ottawa; Ontario; Canada
| | - JP van Tintelen
- Department of Genetics, University Medical Center Groningen; University of Groningen; Groningen; the Netherlands
| | - MH Gollob
- Inherited Arrhythmia Clinic and the Arrhythmia Research Laboratory; University of Ottawa Heart Institute; Ottawa; Ontario; Canada
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Herkert JC, Blaauwwiekel EE, Hoek A, Veenstra-Knol HE, Kema IP, Arlt W, Kerstens MN. A rare cause of congenital adrenal hyperplasia: Antley-Bixler syndrome due to POR deficiency. Neth J Med 2011; 69:281-283. [PMID: 21868813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Cytochrome P450 oxidoreductase (POR) deficiency is a recently discovered new variant of congenital adrenal hyperplasia. Distinctive features of POR deficiency are the presence of disorders of sexual development in both sexes, glucocorticoid deficiency and skeletal malformations similar to those observed in the Antley-Bixler syndrome.
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Affiliation(s)
- J C Herkert
- Department of Genetics, University Medical Centre Groningen, University of Groningen, the Netherlands.
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