Haplotype-resolved X-chromosome inactivation analysis using nanopore sequencing reveals cell-type-specific XCI patterns.

Haplotype-resolved X-chromosome inactivation (XCI) analysis using nanopore sequencing, revealing cell-type-specific XCI patterns

This HGG Advances study uses nanopore sequencing for haplotype-resolved X-chromosome inactivation (XCI) analysis without requiring additional family information. Long-read nanopore simultaneously attributes methylation variants (5-methylcytosine, 5-hydroxymethylcytosine) to each haplotype, revealing cell-type-specific XCI patterns inaccessible to short-read methods. These findings have implications for understanding X-linked diseases in female carriers.

Synthesis written by Geno'X. For the full original abstract, please refer to the source publication.

X-chromosome inactivation is a key determinant of X-linked disease expressivity in female carriers — a carrier with XCI skewed toward the pathogenic allele may present like an affected male. The ability to analyze XCI with haplotypic resolution by nanopore, without family markers, is a methodological advance directly applicable to genetic counseling.

Clinical impact: 1/3 · Evidence strength: 2/3 · Novelty: 2/2 · Sample size: 1/1 · Publication status: 1/1 → Total: 7/10