Fto-dependent Vdac3 m6A Modification Regulates Neuronal Ferroptosis Induced by the Post-ICH Mass Effect and...

Area of Science:

• Neuroscience
• Molecular Biology
• Cell Death Pathways

Background:

• Intracerebral hemorrhage (ICH) causes neuronal damage through mass effect and blood toxicity.
• Oxidative stress and iron overload contribute to ferroptosis, a form of programmed cell death, in neurons post-ICH.
• N6-methyladenosine (m6A) modification is crucial in cell death, and Fto (fat mass and obesity-associated protein) demethylase influences neurological disease pathways by altering m6A levels.

Purpose of the Study:

• To investigate the role of Fto protein in regulating ferroptosis during the hyperacute phase of ICH.
• To identify molecular targets involved in Fto-mediated ferroptosis in neurons.
• To explore potential therapeutic strategies for ICH based on Fto and its downstream targets.

Main Methods:

• Utilized nanopore direct RNA sequencing to identify ferroptosis-associated targets.
• Manipulated Fto protein levels in neurons to assess its effect on ferroptosis.
• Analyzed the m6A methylation status of Vdac3 mRNA in relation to Fto activity and ferroptosis.

Main Results:

• Mass effect and transferrin trigger neuronal oxidative stress, iron uptake, and ferroptosis.
• Reducing Fto protein levels in neurons significantly mitigated ferroptosis induced by the mass effect.
• Voltage-dependent anion channel 3 (Vdac3) was identified as a key target, with Fto regulating ferroptosis via m6A methylation of Vdac3 mRNA.

Conclusions:

• Fto plays a critical role in neuronal ferroptosis during the hyperacute phase of ICH.
• The Fto-Vdac3-m6A methylation axis is a key pathway in ICH-induced neuronal death.
• Targeting Fto presents a promising therapeutic avenue for managing intracerebral hemorrhage.