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SCIENTIFIC LITERATURE · MED

Novel Phenotypes and Deep Intronic Variant Expand TH-Associated Dopa-Responsive Dystonia Spectrum.

Ann Clin Transl Neurol · 2025-03-27

DOI: 10.1002/acn3.70013PMID: 40146714

Open accessbrief-report; Journal Article; Case ReportsOriginal source ↗

Research overview

The text below is the source article’s original abstract under a verified reuse license. cc by

Approximately 20% of dopa-responsive dystonia (DRD) cases remain genetically unresolved. Using whole-genome sequencing, we identified two TH variants in a young DRD patient, including a novel deep intronic variant. Minigene assays confirmed that this variant causes aberrant splicing. The patient exhibited an atypical disease progression compared with typical TH-associated DRD cases, presenting with generalized dystonia, episodic hypotonia, Parkinsonism, and oromandibular dyskinesias. These findings, including the first known documented deep intronic TH variant, expand our understanding of TH-associated DRD's phenotypic and genotypic spectrum, aiding clinical evaluation.

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