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Zanotti, Simona; Magri, Francesca; Salani, Sabrina; Napoli, Laura; Ripolone, Michela; Ronchi, Dario; Fortunato, Francesco; Ciscato, Patrizia; Velardo, Daniele; D'Angelo, Maria Grazia; Gualandi, Francesca; Nigro, Vincenzo; Sciacco, Monica; Corti, Stefania; Comi, Giacomo Pietro; Piga, Daniela
International journal of molecular sciences, 03/2023, Letnik: 24, Številka: 6Journal Article
Collagen VI is a heterotrimeric protein expressed in several tissues and involved in the maintenance of cell integrity. It localizes at the cell surface, creating a microfilamentous network that links the cytoskeleton to the extracellular matrix. The heterotrimer consists of three chains encoded by , and genes. Recessive and dominant molecular defects cause two main disorders, the severe Ullrich congenital muscular dystrophy and the relatively mild and slowly progressive Bethlem myopathy. We analyzed the clinical aspects, pathological features and mutational spectrum of 15 COL6-mutated patients belonging to our cohort of muscular dystrophy probands. Patients presented a heterogeneous phenotype ranging from severe forms to mild adult-onset presentations. Molecular analysis by NGS detected 14 different pathogenic variants, three of them so far unreported. Two changes, localized in the triple-helical domain of COL6A1, were associated with a more severe phenotype. Histological, immunological and ultrastructural techniques were employed for the validation of the genetic variants; they documented the high variability in COL6 distribution and the extracellular matrix disorganization, highlighting the clinical heterogeneity of our cohort. The combined use of these different technologies is pivotal in the diagnosis of COL6 patients.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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