ArticleItalian journal of pediatrics2025
SVseq discloses the genomic complexity of different prenatal, de novo, apparently balanced chromosome rearrangements detected by CMA and karyotype.
Article in Italian journal of pediatrics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- Genetic Analysis and Reproductive Intervention in a Duchenne Muscular Dystrophy Family With Cryptic Complex Chromosomal Rearrangement Identified by Structural Variation Sequencing.Human mutation · 2026Article
- Genetic analysis ofFrontiers in medicine · 2026Article
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7 authors.
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Abstract
backgroundBalanced chromosomal rearrangements (BCRs) are common structural variations (SVs), but only a small number of individuals with BCRs exhibit abnormalities. To better understand the different phenotypes in children diagnosed with BCRs during the prenatal period, we plan to thoroughly investigate the SVs and evaluate their pathogenicity in five children with BCRs.
methodsFive children with BCRs detected through karyotyping and chromosome microarray analysis (CMA) during prenatal diagnoses were analyzed using SVseq technology. A mate-pair library was sequenced on the DNBSEQ-T7 platform. Copy number variations (CNVs) and SVs were then analyzed with paired-end sequencing files. Furthermore, we performed whole-genome sequencing (WGS) on case 4 at a coverage rate of 30X. The pathogenicities of the findings were evaluated according to the American College of Medical Genetics (ACMG) guidelines. Clinical examinations and follow-up assessments were also carried out for these children.
resultsThe results from the SVseq analysis indicated the presence of BCRs in two cases, while the other three exhibited complex chromosomal rearrangements (CCR). Overall, the SVs identified in all five children led to gene disruptions. Cases 1, 2, 3, and 5 affected either an autosomal recessive (AR) gene or a non-loss-of-function (non-LOF) autosomal dominant (AD) gene; notably, no abnormal phenotypes were observed in these four cases during the follow-up period. In contrast, Case 4 involved a pathogenic disruption of the CYLD gene and showed clinical abnormalities, including developmental delays in intelligence, language, and motor skills. Additionally, this case was analyzed using WGS (30X), excluding other pathogenic or likely pathogenic SNVs/Indels that could explain the patient's abnormal phenotype.
conclusionThe SVseq method has a higher positive detection rate for BCRs than conventional techniques. It is crucial to provide BCR individuals, especially fetuses, with SV validation, genetic counseling, and clinical evaluation.
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