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| Paediatric or syndromic cardiomyopathy v2.8 | CRLS1 | Achchuthan Shanmugasundram Classified gene: CRLS1 as Amber List (moderate evidence) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Paediatric or syndromic cardiomyopathy v2.8 | CRLS1 | Achchuthan Shanmugasundram Added comment: Comment on list classification: This gene should be rated AMBER as there are two cases with cardiac defects and they harbour the same homozygous variant. In addition, functional studies from patient fibroblasts showed that these variants impair mitochondrial function. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Paediatric or syndromic cardiomyopathy v2.8 | CRLS1 | Achchuthan Shanmugasundram Gene: crls1 has been classified as Amber List (Moderate Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Paediatric or syndromic cardiomyopathy v2.7 | CRLS1 |
Achchuthan Shanmugasundram gene: CRLS1 was added gene: CRLS1 was added to Cardiomyopathies - including childhood onset. Sources: Literature Mode of inheritance for gene: CRLS1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: CRLS1 were set to 35147173 Phenotypes for gene: CRLS1 were set to Combined oxidative phosphorylation deficiency 57, OMIM:620167 Review for gene: CRLS1 was set to AMBER Added comment: Three individuals from two unrelated families were identified with the same homozygous variant in CRLS1 (p.Ile109Asn). They presented with a mitochondrial disorder characterized by an evolving pattern of cardiomyopathy, encephalopathy, bilateral auditory neuropathy spectrum disorder, bull’s eye maculopathy, diabetes insipidus, autonomic instability and low complex IV activity in skeletal muscle. Of these, patient from family 1 had left ventricular noncompaction and biventricular systolic dysfunction, as diagnosed by echocardiogram at 2 days of life, which evolved to hypertrophic cardiomyopathy by 7 weeks of age. The ECG of second patient from family 2 (patient II:3) demonstrated evere biventricular dysfunction, which subsequently improved, while the other patient from the same family with the variant did not exhibit any cardiac phenotype./ A fourth individual was identified with a compound heterozygous CRLS1 variant (p.Ala172Asp/ p.Leu217Phe) that presented with developmental regression beginning in late infancy, with acquired microcephaly, sensorineural hearing loss and impaired vision. This patient did not show any cardiac phenotype. Functional studies using patient-derived fibroblasts provide evidence that CRLS1 variants cause mitochondrial disease. Sources: Literature |
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