Reprogramming transcription factor networks with a HOX inhibitor to address Huntington's disease biology beyond mutant huntingtin

HOX transcription factors show large, significant functional dominance in vulnerable neurons across each Huntington’s disease donor brain, with CC magnitude linked to age at onset and rising with disease grade and CAG-Age Product.

• Why it matters: Onset variability in Huntington’s disease is only partly explained by inherited CAG-repeat length and somatic instability, implying additional transcriptional mechanisms that persist beyond mutant huntingtin.
• What they did: Using Core Coefficient (CC) network-decoding on >100 post-mortem neuronal transcriptomes, the study quantified HOX TF dominance and tested whether HOX inhibition with COR-H800 could reset TF-network hierarchy in zQ175 and R6/2 mice.
• The result: HOX dominance persists despite transient attenuation after abrogating mutant huntingtin production, while COR-H800 restored wild-type-like TF hierarchy and improved disease-relevant phenotypes in R6/2 mice.

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