RNA exosome activity suppresses toxic protein production linked to C9orf72 ALS
Original source
RAN Translation-Coupled Decay of the C9orf72 GGGGCC Repeat Transcript by the RNA Exosome Suppresses Dipeptide Repeat Production. (opens in a new tab)Compass summarised this from the study's abstract.
Study details
- Studied in
- Human, Cells
Related topics
A study found that repeat-associated non-AUG (RAN) translation of expanded C9orf72 RNA triggers its rapid breakdown by the RNA exosome. Increasing EXOSC3, a component of this complex, reduced production of toxic dipeptide-repeat proteins, while lowering EXOSC3 blocked RNA breakdown in lab-grown neurons.
Why this matters
The findings clarify how cells may limit toxic protein production associated with C9orf72-related amyotrophic lateral sclerosis and frontotemporal dementia. They were made in experimental systems, including induced pluripotent stem cell-derived neurons, and do not yet change treatment or show a benefit for people living with ALS.
Limitations and context
The supplied source is a primary research article abstract. It does not provide study sizes, detailed methods, or evidence from people or clinical treatment. Whether targeting EXOSC3 or the RNA exosome is safe and effective as a therapy remains to be shown.