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Clinical whole-exome sequencing for the diagnosis of rare disorders with congenital anomalies and/or intellectual disability: substantial interest of prospective annual reanalysis

Sophie Nambot 1, 2, 3 Julien Thévenon 1, 2, 3 Paul Kuentz 2, 3 Yannis Duffourd 2, 3 Emilie Tisserant 3, 2 Ange-Line Bruel 3, 2 Anne-Laure Mosca-Boidron 3, 2 Alice Masurel-Paulet 1, 2 Daphné Lehalle 1 Nolwenn Jean-Marçais 1, 2 Mathilde Lefebvre 1 Pierre Vabres 3, 2 Salima El Chehadeh-Djebbar 1 Christophe Philippe 3 Frederic Tran Mau-Them 3 Judith St-Onge 3 Thibaud Jouan 3, 2 Martin Chevarin 3, 2 Charlotte Poe 3, 2 Virginie Carmignac 3 Antonio Vitobello 3, 2 Patrick Callier 3, 2 Jean-Baptiste Rivière 2, 3 Laurence Faivre 1, 3, 2, * Christel Thauvin-Robinet 1, 3, 2, *
* Auteur correspondant
1 Centre de génétique - Centre de référence des maladies rares, anomalies du développement et syndromes malformatifs (CHU de Dijon)
2 FHU TRANSLAD
3 Equipe GAD (LNC - U1231)
LNC - Lipides - Nutrition - Cancer [Dijon - U1231]
Abstract : Purpose Congenital anomalies and intellectual disability (CA/ID) are a major diagnostic challenge in medical genetics—50% of patients still have no molecular diagnosis after a long and stressful diagnostic “odyssey.” Solo clinical whole-exome sequencing (WES) was applied in our genetics center to improve diagnosis in patients with CA/ID. Methods This retrospective study examined 416 consecutive tests performed over 3 years to demonstrate the effectiveness of periodically reanalyzing WES data. The raw data from each nonpositive test was reanalyzed at 12 months with the most recent pipeline and in the light of new data in the literature. The results of the reanalysis for patients enrolled in the third year are not yet available. Results Of the 416 patients included, data for 156 without a diagnosis were reanalyzed. We obtained 24 (15.4%) additional diagnoses: 12 through the usual diagnostic process (7 new publications, 4 initially misclassified, and 1 copy-number variant), and 12 through translational research by international data sharing. The final yield of positive results was 27.9% through a strict diagnostic approach, and 2.9% through an additional research strategy. Conclusion This article highlights the effectiveness of periodically combining diagnostic reinterpretation of clinical WES data with translational research involving data sharing for candidate genes.
Keywords : Whole-exome sequencing Intellectual disability Clinical WES data Congenital anomalies
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https://hal-univ-bourgogne.archives-ouvertes.fr/hal-01635326
Contributeur : Lnc - Université de Bourgogne <>
Soumis le : mercredi 15 novembre 2017 - 09:11:41
Dernière modification le : dimanche 25 octobre 2020 - 07:07:23

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UNIV-BOURGOGNE | LNC-UMR866 | LNC-GAD | POLITIQUES-PUBLIQUES

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Sophie Nambot, Julien Thévenon, Paul Kuentz, Yannis Duffourd, Emilie Tisserant, et al.. Clinical whole-exome sequencing for the diagnosis of rare disorders with congenital anomalies and/or intellectual disability: substantial interest of prospective annual reanalysis. Genetics in Medicine, Nature Publishing Group, 2018, 20 (6), pp.645-654. ⟨10.1038/gim.2017.162⟩. ⟨hal-01635326⟩

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