Researchers investigated the effects of reducing STAUFEN-1 protein levels in human neurons, which were generated from induced pluripotent stem cells (iPSC-derived neurons).
The study aimed to identify findings that could be applicable to patients. Initial gene expression analysis indicated that reducing STAUFEN-1 levels changed the activity of over 3,000 genes, with a decrease observed in many cell death-related genes.
Subsequent experiments involved exposing neurons to compounds like etoposide, which activate p53 and typically induce extensive cell death by causing DNA breaks. Under normal conditions, cells often fail to repair these breaks, leading to widespread death.
When STAUFEN-1 levels were reduced, neurons exhibited prevented DNA damage and increased survival. This protection is considered significant given that DNA breaks are a common occurrence in various neurodegenerative diseases.