ArticleActa neuropathologica communications2020
Ovine congenital progressive muscular dystrophy (OCPMD) is a model of TNNT1 congenital myopathy.
Article in Acta neuropathologica communications, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 11 citations in OpenAlex.
- Epidemiological landscape and genetic prospects for marker-assisted selection in Kazakh sheep.Frontiers in veterinary science · 2025Review
- Transcriptomic and metabolomic dissection of skeletal muscle of crossbred Chongming white goats with different meat production performance.BMC genomics · 2024Article
- A rare TNNT1 gene variant causing creatine kinase elevation in nemaline myopathy: c.271_273del (p.Lys91del).Genes & genomics · 2024Article
- WiTNNess: An international natural history study of infantile-onset TNNT1 myopathy.Annals of clinical and translational neurology · 2023Observational
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16 authors at 5 institutions in 2 countries.
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Abstract
Ovine congenital progressive muscular dystrophy (OCPMD) was first described in Merino sheep flocks in Queensland and Western Australia in the 1960s and 1970s. The most prominent feature of the disease is a distinctive gait with stiffness of the hind limbs that can be seen as early as 3 weeks after birth. The disease is progressive. Histopathological examination had revealed dystrophic changes specifically in type I (slow) myofibres, while electron microscopy had demonstrated abundant nemaline bodies. Therefore, it was never certain whether the disease was a dystrophy or a congenital myopathy with dystrophic features. In this study, we performed whole genome sequencing of OCPMD sheep and identified a single base deletion at the splice donor site (+ 1) of intron 13 in the type I myofibre-specific TNNT1 gene (KT218690 c.614 + 1delG). All affected sheep were homozygous for this variant. Examination of TNNT1 splicing by RT-PCR showed intron retention and premature termination, which disrupts the highly conserved 14 amino acid C-terminus. The variant did not reduce TNNT1 protein levels or affect its localization but impaired its ability to modulate muscle contraction in response to Ca
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