Clinical Utility of a Unique Genome-Wide DNA Methylation Signature for -Related Syndrome.
Fiche publication
Date publication
février 2022
Journal
International journal of molecular sciences
Auteurs
Membres identifiés du Cancéropôle Est :
Pr FAIVRE Laurence, Pr LEBRE Anne-Sophie
Tous les auteurs :
Foroutan A, Haghshenas S, Bhai P, Levy MA, Kerkhof J, McConkey H, Niceta M, Ciolfi A, Pedace L, Miele E, Genevieve D, Heide S, Alders M, Zampino G, Merla G, Fradin M, Bieth E, Bonneau D, Dieterich K, Fergelot P, Schaefer E, Faivre L, Vitobello A, Maitz S, Fischetto R, Gervasini C, Piccione M, van de Laar I, Tartaglia M, Sadikovic B, Lebre AS
Lien Pubmed
Résumé
Wiedemann-Steiner syndrome (WDSTS) is a Mendelian syndromic intellectual disability (ID) condition associated with hypertrichosis cubiti, short stature, and characteristic facies caused by pathogenic variants in the gene. Clinical features can be inconclusive in mild and unusual WDSTS presentations with variable ID (mild to severe), facies (typical or not) and other associated malformations (bone, cerebral, renal, cardiac and ophthalmological anomalies). Interpretation and classification of rare variants can be challenging. A genome-wide DNA methylation episignature for -related syndrome could allow functional classification of variants and provide insights into the pathophysiology of WDSTS. Therefore, we assessed genome-wide DNA methylation profiles in a cohort of 60 patients with clinical diagnosis for WDSTS or Kabuki and identified a unique highly sensitive and specific DNA methylation episignature as a molecular biomarker of WDSTS. WDSTS episignature enabled classification of variants of uncertain significance in the gene as well as confirmation of diagnosis in patients with clinical presentation of WDSTS without known genetic variants. The changes in the methylation profile resulting from mutations involve global reduction in methylation in various genes, including homeobox gene promoters. These findings provide novel insights into the molecular etiology of WDSTS and explain the broad phenotypic spectrum of the disease.
Mots clés
DNA methylation, KMT2A gene, Wiedemann–Steiner syndrome, epigenetics, episignature, intellectual disability, neurodevelopmental disorders
Référence
Int J Mol Sci. 2022 Feb 5;23(3):