Abstract
Mutations in the TTN gene have been reported to be responsible for a range of neuromuscular disorders, including recessive distal myopathy and congenital myopathy (CM). Only five splicing mutations have been identified to induce aberrant mRNA splicing in TTN-related neuromuscular disorders. In our study, we described detailed clinical characteristics, muscle pathology and genetic analysis of two probands with TTN-related autosomal recessive neuromuscular disorders. Besides, we identified two novel intronic mutations, c.107377+1 G > C in intron 362 and c.19994-2 A > G in intron 68, in the two probands. Through cDNA analysis, we revealed the c.107377+1 G > C mutation induced retention of the entire intron 362, and the c.19994-2 A > G mutation triggered skipping of the first 11 bp of exon 69. Our study broadens the aberrant splicing spectrum of neuromuscular disorders caused by splicing mutations in the TTN gene.
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References
Bang ML, Centner T, Fornoff F, Geach AJ, Gotthardt M, McNabb M, et al. The complete gene sequence of titin, expression of an unusual approximately 700-kDa titin isoform, and its interaction with obscurin identify a novel Z-line to I-band linking system. Circ Res. 2001;89:1065–72.
Kontrogianni-Konstantopoulos A, Ackermann MA, Bowman AL, Yap SV, Bloch RJ. Muscle giants: molecular scaffolds in sarcomerogenesis. Physiol Rev. 2009;89:1217–67.
Linke WA. Sense and stretchability: the role of titin and titin-associated proteins in myocardial stress-sensing and mechanical dysfunction. Cardiovasc Res. 2008;77:637–48.
Puchner EM, Alexandrovich A, Kho AL, Hensen U, Schafer LV, Brandmeier B, et al. Mechanoenzymatics of titin kinase. Proc Natl Acad Sci USA. 2008;105:13385–90.
Evila A, Vihola A, Sarparanta J, Raheem O, Palmio J, Sandell S, et al. Atypical phenotypes in titinopathies explained by second titin mutations. Ann Neurol. 2014;75:230–40.
Evila A, Palmio J, Vihola A, Savarese M, Tasca G, Penttila S, et al. Targeted next-generation sequencing reveals novel TTN mutations causing recessive distal titinopathy. Mol Neurobiol. 2017;54:7212–23.
Rees M, Nikoopour R, Fukuzawa A, Kho AL, Fernandez-Garcia MA, Wraige E, et al. Making sense of missense variants in TTN-related congenital myopathies. Acta Neuropathol. 2021;141:431–53.
Oates EC, Jones KJ, Donkervoort S, Charlton A, Brammah S, Smith JE 3rd, et al. Congenital titinopathy: comprehensive characterization and pathogenic insights. Ann Neurol. 2018;83:1105–24.
Ceyhan-Birsoy O, Agrawal PB, Hidalgo C, Schmitz-Abe K, DeChene ET, Swanson LC, et al. Recessive truncating titin gene, TTN, mutations presenting as centronuclear myopathy. Neurology .2013;81:1205–14.
Harris E, Topf A, Vihola A, Evila A, Barresi R, Hudson J, et al. A ‘second truncation’ in TTN causes early onset recessive muscular dystrophy. Neuromuscul Disord. 2017;27:1009–17.
Ge L, Fu X, Zhang W, Wang D, Wang Z, Yuan Y, et al. Recessive mutations in proximal I-band of TTN gene cause severe congenital multi-minicore disease without cardiac involvement. Neuromuscul Disord. 2019;29:350–7.
Bryen SJ, Ewans LJ, Pinner J, MacLennan SC, Donkervoort S, Castro D, et al. Recurrent TTN metatranscript-only c.39974-11T>G splice variant associated with autosomal recessive arthrogryposis multiplex congenita and myopathy. Hum Mutat. 2020;41:403–11.
Laddach A, Gautel M, Fraternali F. TITINdb-a computational tool to assess titin’s role as a disease gene. Bioinformatics 2017;33:3482–5.
Peric S, Glumac JN, Topf A, Savic-Pavicevic D, Phillips L, Johnson K, et al. A novel recessive TTN founder variant is a common cause of distal myopathy in the Serbian population. Eur J Hum Genet. 2017;25:572–81.
Yu M, Zhu Y, Xie Z, Zheng Y, Xiao J, Zhang W, et al. Novel TTN mutations and muscle imaging characteristics in congenital titinopathy. Ann Clin Transl Neurol. 2019;6:1311–8.
Richards S, Aziz N, Bale S, Bick D, Das S, Gastier-Foster J, et al. Standards and guidelines for the interpretation of sequence variants: a joint consensus recommendation of the American college of medical genetics and genomics and the association for molecular pathology. Genet Med. 2015;17:405–24.
Udd B, Hackman P. Udd Distal Myopathy – Tibial Muscular Dystrophy. In: Adam MP, Mirzaa GM, Pagon RA, et al., eds. GeneReviews®. Seattle (WA): University of Washington, Seattle; February 17, 2005.
Tasca G, Udd B. Hereditary myopathy with early respiratory failure (HMERF): Still rare, but common enough. Neuromuscul Disord. 2018;28:268–76.
Savarese M, Vihola A, Oates EC, Barresi R, Fiorillo C, Tasca G, et al. Genotype-phenotype correlations in recessive titinopathies. Genet Med. 2020;22:2029–40.
Funding
This study was funded by National Natural Science Foundation of China (Grant No. 82271436), Shandong Provincial Natural Science Foundation (Grant No. ZR2022MH190) and Qingdao Science and Technology Benefit People Demonstration Guide Special Project (Grant/Award Number: 22-8-7-smjk-1-nsh).
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This study was in compliance with the Declaration of Helsinki and approved by the Ethics Committee of Qilu Hospital of Shandong University. Informed consent was provided by the patient and parents.
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Wang, G., Wu, W., Lv, X. et al. Aberrant mRNA processing caused by splicing mutations in TTN-related neuromuscular disorders. J Hum Genet 68, 777–782 (2023). https://doi.org/10.1038/s10038-023-01182-w
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DOI: https://doi.org/10.1038/s10038-023-01182-w