Evaluating CHARGE syndrome in congenital hypogonadotropic hypogonadism patients harboring CHD7 variants.

Xu, Cheng; Cassatella, Daniele; van der Sloot, Almer M; Quinton, Richard; Hauschild, Michael; De Geyter, Christian; Flück Pandey, Christa Emma; Feller, Katrin Madeleine; Bartholdi, Deborah; Nemeth, Attila; Halperin, Irene; Pekic Djurdjevic, Sandra; Maeder, Philippe; Papadakis, Georgios; Dwyer, Andrew A; Marino, Laura; Favre, Lucie; Pignatelli, Duarte; Niederländer, Nicolas J; Acierno, James; ... (2018). Evaluating CHARGE syndrome in congenital hypogonadotropic hypogonadism patients harboring CHD7 variants. Genetics in medicine, 20(8), pp. 872-881. Palgrave Macmillan 10.1038/gim.2017.197

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PurposeCongenital hypogonadotropic hypogonadism (CHH), a rare genetic disease caused by gonadotropin-releasing hormone deficiency, can also be part of complex syndromes (e.g., CHARGE syndrome). CHD7 mutations were reported in 60% of patients with CHARGE syndrome, and in 6% of CHH patients. However, the definition of CHD7 mutations was variable, and the associated CHARGE signs in CHH were not systematically examined.MethodsRare sequencing variants (RSVs) in CHD7 were identified through exome sequencing in 116 CHH probands, and were interpreted according to American College of Medical Genetics and Genomics guidelines. Detailed phenotyping was performed in CHH probands who were positive for CHD7 RSVs, and genotype-phenotype correlations were evaluated.ResultsOf the CHH probands, 16% (18/116) were found to harbor heterozygous CHD7 RSVs, and detailed phenotyping was performed in 17 of them. Of CHH patients with pathogenic or likely pathogenic CHD7 variants, 80% (4/5) were found to exhibit multiple CHARGE features, and 3 of these patients were reclassified as having CHARGE syndrome. In contrast, only 8% (1/12) of CHH patients with nonpathogenic CHD7 variants exhibited multiple CHARGE features (P = 0.01).ConclusionPathogenic or likely pathogenic CHD7 variants rarely cause isolated CHH. Therefore a detailed clinical investigation is indicated to clarify the diagnosis (CHH versus CHARGE) and to optimize clinical management.Genetics in Medicine advance online publication, 16 November 2017; doi:10.1038/gim.2017.197.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Gynaecology, Paediatrics and Endocrinology (DFKE) > Clinic of Endocrinology, Diabetology and Clinical Nutrition
04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR) > Unit Childrens Hospital > Forschungsgruppe Humangenetik
04 Faculty of Medicine > Department of Gynaecology, Paediatrics and Endocrinology (DFKE) > Clinic of Paediatric Medicine
04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR) > Unit Childrens Hospital > Forschungsgruppe Endokrinologie / Diabetologie / Metabolik (Pädiatrie)
04 Faculty of Medicine > Department of Gynaecology, Paediatrics and Endocrinology (DFKE)

UniBE Contributor:

Flück Pandey, Christa Emma; Feller, Katrin Madeleine and Bartholdi, Deborah

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0047-2506

Publisher:

Palgrave Macmillan

Language:

English

Submitter:

André Schaller

Date Deposited:

09 Feb 2018 16:35

Last Modified:

21 Sep 2018 01:30

Publisher DOI:

10.1038/gim.2017.197

PubMed ID:

29144511

BORIS DOI:

10.7892/boris.109627

URI:

https://boris.unibe.ch/id/eprint/109627

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