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Details

Autor(en) / Beteiligte
Titel
Diagnostic Yield of Next-Generation Sequencing in Very Early-Onset Inflammatory Bowel Diseases: A Multicenter Study
Ist Teil von
  • Journal of Crohn's and colitis, 2018-09, Vol.12 (9), p.1104-1112
Ort / Verlag
Elsevier - Oxford University Press
Erscheinungsjahr
2018
Link zum Volltext
Quelle
Oxford Journals 2020 Medicine
Beschreibungen/Notizen
  • Background and Aims: An expanding number of monogenic defects have been identified as causative of severe forms of very early-onset inflammatory bowel diseases (VEO-IBD). The present study aimed at defining how next-generation sequencing (NGS) methods can be used to improve identification of known molecular diagnosis and adapt treatment. Methods: 207 children were recruited in 45 Paediatric centres through an international collaborative network (ESPGHAN GENIUS working group) with a clinical presentation of severe VEO-IBD (n=185) or an anamnesis suggestive of a monogenic disorder (n=22). Patients were divided at inclusion into three phenotypic subsets: predominantly small bowel inflammation, colitis with perianal lesions, and colitis only. Methods to obtain molecular diagnosis included functional tests followed by specific Sanger sequencing, custom-made targeted NGS, and in selected cases whole exome sequencing (WES) of parents-child trios. Genetic findings were validated clinically and/or functionally. Results: Molecular diagnosis was achieved in 66/207 children (32%): 61% with small bowel inflammation, 39% with colitis and perianal lesions and 18% with colitis only. Targeted NGS pinpointed gene mutations causative of atypical presentations and identified large exonic copy number variations previously missed by WES. Conclusions: Our results lead us to propose an optimised diagnostic strategy to identify known monogenic causes of severe IBD.
Sprache
Englisch
Identifikatoren
ISSN: 1873-9946
eISSN: 1876-4479
DOI: 10.1093/ecco-jcc/jjy068
Titel-ID: cdi_hal_primary_oai_HAL_hal_02320500v2

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