Muscular dystrophy and myopathy_Paediatric
Gene: CIAO1
Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal
Phenotypes
Multiple mitochondrial dysfunctions syndrome 10, MIM#620960
PMID:38196629 (note pre-print) describes 4 unrelated patients with core features of progressive muscle weakness, respiratory insufficiency, joint hyperlaxity, ankle tightness, calf pseudohypertrophy, elevated CK, and larning disabilities/difficulties. 2 patients presented with increased iron deposition in the brain. Age of recognition of myopathic symptoms varied from early childhood to adolescence. Muscle biopsy showed variation in fiber size and an increase in internalized nuclei, as well as scattered degenerating/regenerating fibers and a mild to minimal increase in endomysial fibrosis. Electron microscopy revealed morphologically abnormal mitochondria.
PMID: 38411040 reports 2 unrelated patients. Patient 1 was born with microcephaly and borderline hypertonia, and died at 18 months of respiratory failure from bronchiolitis. Patient 2 presented with failure to thrive, a hyperkinetic movement disorder, and autism before deteriorating in late teens with muscle weakness, recurrent pneuomonia with respiratory insufficiency, and eventually death due to multi-organ failure with carnificating pneumonia, septic cardiomyopathy, and intracranial hemorrhages. Immune deficiency was ruled out.
All variants reported were homozygous or compound heterozygous missense variants, with the exception of one large in-frame deletion of exon 7. Cell line studies showed the variants resulted in reduced protein stability and downstream cellular defects which could be rescued by wild-type CIAO1.
Sources: LiteratureCreated: 7 Mar 2024, 2:32 a.m.
Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal
Phenotypes
Neuromuscular disease, CIAO1-related (MONDO:0019056)
Publications
Variants in this GENE are reported as part of current diagnostic practice
Phenotypes for gene: CIAO1 were changed from Neurodegenerative disease, MONDO:0005559, CIAO1-related to Multiple mitochondrial dysfunctions syndrome 10, MIM#620960
Phenotypes for gene: CIAO1 were changed from Neuromuscular disease, CIAO1-related (MONDO:0019056) to Neurodegenerative disease, MONDO:0005559, CIAO1-related
Phenotypes for gene: CIAO1 were changed from Neurodegenerative disease, MONDO:0005559, CIAO1-related to Neuromuscular disease, CIAO1-related (MONDO:0019056)
Gene: ciao1 has been classified as Green List (High Evidence).
Phenotypes for gene: CIAO1 were changed from Neuromuscular disease, CIAO1-related (MONDO:0019056) to Neurodegenerative disease, MONDO:0005559, CIAO1-related
Gene: ciao1 has been classified as Green List (High Evidence).
gene: CIAO1 was added gene: CIAO1 was added to Muscular dystrophy and myopathy_Paediatric. Sources: Literature Mode of inheritance for gene: CIAO1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: CIAO1 were set to 38411040; 38196629 Phenotypes for gene: CIAO1 were set to Neuromuscular disease, CIAO1-related (MONDO:0019056) Penetrance for gene: CIAO1 were set to unknown Review for gene: CIAO1 was set to GREEN gene: CIAO1 was marked as current diagnostic