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Article Abstract

Mutations in the non-coding RNA gene RNU4ATAC are associated with growth restriction and complications related to antibody deficiency. Here, we report that innate immune dysfunction is a previously unrecognised feature of this disorder. In particular, painful chilblain-like lesions are common in RNU4ATAC patients and are linked to dysregulated type I interferon signalling.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC12104551PMC
http://dx.doi.org/10.1002/eji.202451518DOI Listing

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Mutations in the non-coding RNA gene RNU4ATAC are associated with growth restriction and complications related to antibody deficiency. Here, we report that innate immune dysfunction is a previously unrecognised feature of this disorder. In particular, painful chilblain-like lesions are common in RNU4ATAC patients and are linked to dysregulated type I interferon signalling.

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RNA-sequencing has improved the diagnostic yield of individuals with rare diseases. Current analyses predominantly focus on identifying outliers in single genes that can be attributed to cis-acting variants within the gene locus. This approach overlooks causal variants with trans-acting effects on splicing transcriptome-wide, such as variants impacting spliceosome function.

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Article Synopsis
  • * The condition is characterized by microcephaly, short stature, and hypotonia, and may be one of the most common single-gene causes of neurodevelopmental issues.
  • * Identifying affected individuals can be done through recognizable facial features, which is important for diagnosis in areas with limited access to advanced genetic testing.
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Underdiagnosed Roifman syndrome manifested as non-ischaemic cardiomyopathy: a case report.

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Roifman syndrome is a rare congenital disorder characterized by growth retardation, cognitive delay, spondyloepiphyseal dysplasia, immunodeficiency, and retinal dystrophy. However, very rarely, with only one case reported to date, a patient with Roifman syndrome may develop cardiomyopathy in their lifetime. We reported a case with underdiagnosed Roifman syndrome confirmed by whole genome sequencing, manifested as non-ischaemic cardiomyopathy, which has broadened the association between non-ischaemic cardiomyopathy and the genetic disorder Roifman syndrome.

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Purpose: To characterize the retinal phenotype in RNU4ATAC-associated Roifman syndrome.

Methods: Ten patients (including 8 males) with molecularly confirmed Roifman syndrome underwent detailed ophthalmologic evaluation including fundus imaging, fundus autofluorescence (FAF) imaging, spectral-domain optical coherence tomography (SD-OCT), and electroretinography (ERG). Six patients had follow-up eye exams.

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