ArticleMolecular genetics & genomic medicine2025
Characterization of Variants of Uncertain Significance in ACADVL Gene From a Very-Long-Chain Acyl-CoA Dehydrogenase Deficiency Patient.
Article in Molecular genetics & genomic medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Characterization of Variants of Uncertain Significance in ACADVL Gene From a Very-Long-Chain Acyl-CoA Dehydrogenase Deficiency Patient.Molecular genetics & genomic medicine · 2025Article
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6 authors.
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Abstract
backgroundVery-long-chain acyl-CoA dehydrogenase deficiency (VLCADD) is a rare disorder of long-chain mitochondrial fatty acid oxidation (FAO) caused by biallelic mutations in the acyl-CoA dehydrogenase very-long-chain (ACADVL) gene with autosomal recessive (AR) inheritance. Currently, the ACADVL gene has over 350 VUSs in the ClinVar database that require characterization to determine potential pathogenicity.
methodsIn this study, we performed functional studies and three-dimensional protein structure analysis to identify the pathogenicity of two ACADVL VUSs in a Chinese VLCADD patient with severe clinical symptoms.
resultsBiallelic variants in ACADVL gene c.1055T>C (p.Met352Thr) and c.1269G>A (p.Ser423=) were identified by whole-genome sequencing (WGS) and confirmed using Sanger sequencing. Both variants were recorded in ClinVar database with "conflicting interpretation of its pathogenicity" and need appropriate evidence for reclassification to guide family reproductive planning. Synonymous variant p.Ser423= could result in skipping of exon 12 through mini-gene splicing experiment testing. Further functional studies reveal that both variants yield a mild-to-severe decrease in ACADVL mRNA and protein expression in vitro.
conclusionIn this study, we determined the pathogenicity of ACADVL variants c.1055T>C (p.Met352Thr) and c.1269G>A (p.Ser423=) via experimental and in silico analysis. The findings contribute to expanding the variant spectrum in the ACADVL gene, and exploring the pathogenicity of VUS may provide us with further understanding of the disease.
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