We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Molecular Etiology Disclosed by Array CGH in Patients With Silver–Russell Syndrome or Similar Phenotypes.
- Authors
Crippa, Milena; Bonati, Maria Teresa; Calzari, Luciano; Picinelli, Chiara; Gervasini, Cristina; Sironi, Alessandra; Bestetti, Ilaria; Guzzetti, Sara; Bellone, Simonetta; Selicorni, Angelo; Mussa, Alessandro; Riccio, Andrea; Ferrero, Giovanni Battista; Russo, Silvia; Larizza, Lidia; Finelli, Palma
- Abstract
Introduction: Silver–Russell syndrome (SRS) is an imprinting disorder primarily caused by genetic and epigenetic aberrations on chromosomes 11 and 7. SRS is a rare growth retardation disorder often misdiagnosed due to its heterogeneous and non-specific clinical features. The Netchine–Harbison clinical scoring system (NH-CSS) is the recommended tool for differentiating patients into clinical SRS or unlikely SRS. However, the clinical diagnosis is molecularly confirmed only in about 60% of patients, leaving the remaining substantial proportion of SRS patients with unknown genetic etiology. Materials and Methods: A cohort of 34 Italian patients with SRS or SRS-like features scored according to the NH-CSS and without any SRS-associated (epi)genetic alterations was analyzed by high-resolution array-based comparative genomic hybridization (CGH) in order to identify potentially pathogenic copy number variants (CNVs). Results and Discussion: In seven patients, making up 21% of the initial cohort, five pathogenic and two potentially pathogenic CNVs were found involving distinct genomic regions either previously associated with growth delay conditions (1q24.3-q25.3, 17p13.3, 17q22, and 22q11.2-q11.22) and with SRS spectrum (7p12.1 and 7p15.3-p14.3) or outlined for the first time (19q13.42), providing a better definition of reported and as yet unreported SRS overlapping syndromes. All the variants involve genes with a defined role in growth pathways, and for two genes mapping at 7p, IGF2BP3 and GRB10 , the association with SRS turns out to be reinforced. The deleterious effect of the two potentially pathogenic variants, comprising GRB10 and ZNF331 genes, was explored by targeted approaches, though further studies are needed to validate their pathogenic role in the SRS etiology. In conclusion, we reconfirm the utility of performing a genome-wide scan to achieve a differential diagnosis in patients with SRS or similar features and to highlight novel chromosome alterations associated with SRS and growth retardation disorders.
- Subjects
UNITED States. National Security Agency/Central Security Service; DNA copy number variations; COMPARATIVE genomic hybridization; CHROMOSOME abnormalities; ETIOLOGY of diseases; GROWTH disorders; EPIGENETICS
- Publication
Frontiers in Genetics, 2019, p1
- ISSN
1664-8021
- Publication type
Article
- DOI
10.3389/fgene.2019.00955