Lipid peroxidation-induced cell death in Rett syndrome

Area of Science:

• Neuroscience
• Cell Biology
• Genetics

Background:

• Rett Syndrome (RTT) is a rare neurodevelopmental disorder caused by MECP2 gene mutations.
• Ferroptosis, an iron-dependent cell death, is implicated in neurodevelopmental disorders.
• RTT exhibits hallmarks aligning with ferroptosis, including redox imbalance and excess iron.

Purpose of the Study:

• To investigate the role of ferroptosis in Rett Syndrome.
• To determine if RTT cells are more vulnerable to ferroptosis.
• To explore potential therapeutic strategies targeting ferroptosis in RTT.

Main Methods:

• Utilized human primary fibroblasts from healthy and RTT subjects.
• Treated cells with ferroptosis inducers (erastin, RSL3) and inhibitors (Ferrostatin-1).
• Assessed lipid peroxidation, mitochondrial ROS, iron metabolism, and antioxidant defenses.

Main Results:

• RTT cells demonstrated heightened susceptibility to ferroptosis, with increased lipid peroxidation and mtROS.
• Altered iron metabolism and dysregulated ferritinophagy were observed in RTT cells.
• Ferroptosis inducers exacerbated redox imbalance, while inhibitors normalized RTT cell conditions.

Conclusions:

• RTT cells display general dysregulation leading to increased ferroptosis sensitivity.
• Ferroptosis plays a significant role in RTT pathophysiology and progression.
• Targeting ferroptosis presents a promising therapeutic avenue for Rett Syndrome.