A study linked genetic variants to age of onset in semantic-variant primary progressive aphasia
Original source
Clinical characteristics of semantic variant of primary progressive aphasia with TDP-43- and tau-related gene variants. (opens in a new tab)Compass summarised this from the study's abstract.
Study details
- Study type
- Case report
- Studied in
- Human
People with tau-related gene variants developed semantic-variant primary progressive aphasia at a younger average age than those with TDP-43-related gene variants. The analysis included 76 patients, including one newly reported case, and found that MAPT and TARDBP variants were common in this group. [S1]
Why this matters
The findings may help researchers understand how genetic variants relate to this form of progressive language impairment. They do not establish a treatment benefit or change treatment for people with ALS/MND, because the study examined semantic-variant primary progressive aphasia rather than ALS/MND. [S1]
Limitations and context
This was a case report combined with a review of previously published cases, not a prospective clinical trial. The analysis covered 76 patients drawn from 31 reports, so the reported mutation frequencies may not represent all people with semantic-variant primary progressive aphasia. The study did not test a treatment or report ALS/MND outcomes.