Silencing the mutant allele without compromising gene dosage.

SNP-guided epigenetic repression of mutant alleles can induce compensatory expression from non-targeted alleles, maintaining gene dosage in dominant genetic disorders.

• Why it matters: This approach addresses the challenge of suppressing pathogenic alleles without reducing overall gene expression, which is crucial for preserving normal gene function in therapy.
• What they did: Wang et al. used SNP-guided epigenetic repression to target mutant alleles and observed that non-targeted alleles increased their expression to compensate.
• The result: The findings suggest that allele-specific silencing may preserve gene dosage, informing future therapeutic strategies for dominant genetic disorders.