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Genetics in medicine : official journal of the American College of Medical Genetics · 2020

Genotype-phenotype correlations in recessive titinopathies.

СтатьяПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод пока не подготовлен
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Savarese Marco, Vihola Anna, Oates Emily C, Barresi Rita, Fiorillo Chiara, Tasca Giorgio, Jokela Manu, Sarkozy Anna, Luo Sushan, Díaz-Manera Jordi, Ehrstedt Christoffer, Rojas-García Ricardo, Sáenz Amets, Muelas Nuria, Lonardo Fortunato, Fodstad Heidi, Qureshi Talha, Johari Mridul, Välipakka Salla, Luque Helena, Petiot Philippe, de Munain Adolfo López, Pane Marika, Mercuri Eugenio, Torella Annalaura, Nigro Vincenzo, Astrea Guja, Santorelli Filippo Maria, Bruno Claudio, Kuntzer Thierry, Illa Isabel, Vílchez Juan J, Julien Cedric, Ferreiro Ana, Malandrini Alessandro, Zhao Chong-Bo, Casar-Borota Olivera, Davis Mark, Muntoni Francesco, Hackman Peter, Udd Bjarne

Аннотация

PURPOSE: High throughput sequencing analysis has facilitated the rapid analysis of the entire titin (TTN) coding sequence. This has resulted in the identification of a growing number of recessive titinopathy patients. The aim of this study was to (1) characterize the causative genetic variants and clinical features of the largest cohort of recessive titinopathy patients reported to date and (2) to evaluate genotype-phenotype correlations in this cohort.

METHODS: We analyzed clinical and genetic data in a cohort of patients with biallelic pathogenic or likely pathogenic TTN variants. The cohort included both previously reported cases (100 patients from 81 unrelated families) and unreported cases (23 patients from 20 unrelated families).

RESULTS: Overall, 132 causative variants were identified in cohort members. More than half of the cases had hypotonia at birth or muscle weakness and a delayed motor development within the first 12 months of life (congenital myopathy) with causative variants located along the entire gene. The remaining patients had a distal or proximal phenotype and a childhood or later (noncongenital) onset. All noncongenital cases had at least one pathogenic variant in one of the final three TTN exons (362-364).

CONCLUSION: Our findings suggest a novel association between the location of nonsense variants and the clinical severity of the disease.

Предметные рубрики MeSH

ИП Урсолов Владлен Сергеевич

ИНН 500118482352 · ОГРНИП 314500117700049

Реквизиты и контакты