TRAF7 mutations stabilize K/NRAS and hyperactivate MAPK signaling to cause CAFDADD neurodevelopmental defects.

TRAF7 mutations cause neurodevelopmental defects by stabilizing RAS proteins and hyperactivating MAPK signaling, leading to CAFDADD syndrome in mice and humans.

• Why it matters: Understanding how TRAF7 mutations disrupt neurodevelopment is crucial because the pathway's hyperactivation underlies many neurodevelopmental disorders, yet its molecular mechanisms remain unclear.
• What they did: Researchers created a Traf7 R654Q/+ mouse model and patient-derived human cortical organoids with the R655Q mutation, analyzing their growth, neurogenesis, and molecular interactions, especially with RAS proteins.
• The result: Mutant models showed growth and neurobehavioral issues, with increased RAS stability and MAPK pathway activation; MEK inhibition partially rescued defects, highlighting potential therapeutic targets.