Large-scale genetic profiling of hereditary ataxias in China: implications for a stepwise molecular diagnostic strategy

Description

Jin-Yang Yu and eleven colleagues profiled the genetics of inherited ataxias across more than two thousand Chinese patients, building the HARMONY cohort from two Yangtze River Delta centers. These coordination disorders come in dozens of flavors, and the local mix shapes how testing should be ordered. The team combined diagnoses with systematic testing and sorted results as definitive, probable, unclear, or undiagnosed.

Nearly eighty-five percent of the 2,096 patients received a molecular answer. One subtype towered over the rest: spinocerebellar ataxia type 3 accounted for about sixty percent, trailed by types 2 and 1 in single digits. Beyond those giants stretched a long tail of rare causes, and five candidate genes turned up empty. The authors convert the landscape into a stepwise testing algorithm tuned for their region, testing the common expansions first. They argue such maps speed diagnosis, sharpen counseling, and point therapy developers to the subtypes that matter most.

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Source: https://europepmc.org/article/MED/PMC13621623