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Diagnostic Utility of Genome-wide DNA Methylation Testing in Genetically Unsolved Individuals with Suspected Hereditary Conditions.
Aref-Eshghi, Erfan; Bend, Eric G; Colaiacovo, Samantha; Caudle, Michelle; Chakrabarti, Rana; Napier, Melanie; Brick, Lauren; Brady, Lauren; Carere, Deanna Alexis; Levy, Michael A; Kerkhof, Jennifer; Stuart, Alan; Saleh, Maha; Beaudet, Arthur L; Li, Chumei; Kozenko, Maryia; Karp, Natalya; Prasad, Chitra; Siu, Victoria Mok; Tarnopolsky, Mark A; Ainsworth, Peter J; Lin, Hanxin; Rodenhiser, David I; Krantz, Ian D; Deardorff, Matthew A; Schwartz, Charles E; Sadikovic, Bekim.
Afiliação
  • Aref-Eshghi E; Department of Pathology and Laboratory Medicine, Western University, London, ON N6A 3K7, Canada; Molecular Genetics Laboratory, Molecular Diagnostics Division, London Health Sciences Centre, London, ON N6A 5W9, Canada.
  • Bend EG; Greenwood Genetic Center, Greenwood, SC 29646, USA.
  • Colaiacovo S; Medical Genetics Program of Southwestern Ontario, London Health Sciences Centre, London, ON N6A 5W9, Canada.
  • Caudle M; Medical Genetics Program of Southwestern Ontario, London Health Sciences Centre, London, ON N6A 5W9, Canada.
  • Chakrabarti R; Medical Genetics Program of Southwestern Ontario, London Health Sciences Centre, London, ON N6A 5W9, Canada.
  • Napier M; Medical Genetics Program of Southwestern Ontario, London Health Sciences Centre, London, ON N6A 5W9, Canada.
  • Brick L; Department of Pediatrics, McMaster University, Hamilton, ON L8S 4L8, Canada.
  • Brady L; Department of Pediatrics, McMaster University, Hamilton, ON L8S 4L8, Canada.
  • Carere DA; Molecular Genetics Laboratory, Molecular Diagnostics Division, London Health Sciences Centre, London, ON N6A 5W9, Canada.
  • Levy MA; Department of Pathology and Laboratory Medicine, Western University, London, ON N6A 3K7, Canada; Molecular Genetics Laboratory, Molecular Diagnostics Division, London Health Sciences Centre, London, ON N6A 5W9, Canada.
  • Kerkhof J; Molecular Genetics Laboratory, Molecular Diagnostics Division, London Health Sciences Centre, London, ON N6A 5W9, Canada.
  • Stuart A; Molecular Genetics Laboratory, Molecular Diagnostics Division, London Health Sciences Centre, London, ON N6A 5W9, Canada.
  • Saleh M; Medical Genetics Program of Southwestern Ontario, London Health Sciences Centre, London, ON N6A 5W9, Canada.
  • Beaudet AL; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA.
  • Li C; Department of Pediatrics, McMaster University, Hamilton, ON L8S 4L8, Canada.
  • Kozenko M; Department of Pediatrics, McMaster University, Hamilton, ON L8S 4L8, Canada.
  • Karp N; Medical Genetics Program of Southwestern Ontario, London Health Sciences Centre, London, ON N6A 5W9, Canada.
  • Prasad C; Medical Genetics Program of Southwestern Ontario, London Health Sciences Centre, London, ON N6A 5W9, Canada.
  • Siu VM; Medical Genetics Program of Southwestern Ontario, London Health Sciences Centre, London, ON N6A 5W9, Canada.
  • Tarnopolsky MA; Department of Pediatrics, McMaster University, Hamilton, ON L8S 4L8, Canada.
  • Ainsworth PJ; Department of Pathology and Laboratory Medicine, Western University, London, ON N6A 3K7, Canada; Molecular Genetics Laboratory, Molecular Diagnostics Division, London Health Sciences Centre, London, ON N6A 5W9, Canada.
  • Lin H; Department of Pathology and Laboratory Medicine, Western University, London, ON N6A 3K7, Canada; Molecular Genetics Laboratory, Molecular Diagnostics Division, London Health Sciences Centre, London, ON N6A 5W9, Canada.
  • Rodenhiser DI; Department of Pediatrics, Biochemistry and Oncology, Western University, London, ON N6A 3K7, Canada.
  • Krantz ID; The University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA.
  • Deardorff MA; The University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA.
  • Schwartz CE; Greenwood Genetic Center, Greenwood, SC 29646, USA.
  • Sadikovic B; Department of Pathology and Laboratory Medicine, Western University, London, ON N6A 3K7, Canada; Molecular Genetics Laboratory, Molecular Diagnostics Division, London Health Sciences Centre, London, ON N6A 5W9, Canada. Electronic address: bekim.sadikovic@lhsc.on.ca.
Am J Hum Genet ; 104(4): 685-700, 2019 04 04.
Article em En | MEDLINE | ID: mdl-30929737
ABSTRACT
Conventional genetic testing of individuals with neurodevelopmental presentations and congenital anomalies (ND/CAs), i.e., the analysis of sequence and copy number variants, leaves a substantial proportion of them unexplained. Some of these cases have been shown to result from DNA methylation defects at a single locus (epi-variants), while others can exhibit syndrome-specific DNA methylation changes across multiple loci (epi-signatures). Here, we investigate the clinical diagnostic utility of genome-wide DNA methylation analysis of peripheral blood in unresolved ND/CAs. We generate a computational model enabling concurrent detection of 14 syndromes using DNA methylation data with full accuracy. We demonstrate the ability of this model in resolving 67 individuals with uncertain clinical diagnoses, some of whom had variants of unknown clinical significance (VUS) in the related genes. We show that the provisional diagnoses can be ruled out in many of the case subjects, some of whom are shown by our model to have other diseases initially not considered. By applying this model to a cohort of 965 ND/CA-affected subjects without a previous diagnostic assumption and a separate assessment of rare epi-variants in this cohort, we identify 15 case subjects with syndromic Mendelian disorders, 12 case subjects with imprinting and trinucleotide repeat expansion disorders, as well as 106 case subjects with rare epi-variants, a portion of which involved genes clinically or functionally linked to the subjects' phenotypes. This study demonstrates that genomic DNA methylation analysis can facilitate the molecular diagnosis of unresolved clinical cases and highlights the potential value of epigenomic testing in the routine clinical assessment of ND/CAs.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Anormalidades Congênitas / Metilação de DNA / Estudo de Associação Genômica Ampla / Doenças Genéticas Inatas Tipo de estudo: Diagnostic_studies / Etiology_studies / Incidence_studies / Observational_studies / Prognostic_studies / Risk_factors_studies Limite: Humans Idioma: En Revista: Am J Hum Genet Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Canadá

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Anormalidades Congênitas / Metilação de DNA / Estudo de Associação Genômica Ampla / Doenças Genéticas Inatas Tipo de estudo: Diagnostic_studies / Etiology_studies / Incidence_studies / Observational_studies / Prognostic_studies / Risk_factors_studies Limite: Humans Idioma: En Revista: Am J Hum Genet Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Canadá