mRNA m⁶A modifications and the RNA-binding protein YTHDF1 affect translational control in both normal and...

Area of Science:

• Neuroscience
• Molecular Biology
• Genetics

Background:

• Neural plasticity enables adaptation but can lead to maladaptive outcomes in neurological and psychiatric disorders.
• Consolidating learning necessitates new protein synthesis, a process influenced by molecular mechanisms.
• Understanding these mechanisms is key to harnessing neural plasticity for disease prevention and treatment.

Purpose of the Study:

• To investigate the role of mRNA m⁶A modifications and the RNA-binding protein YTHDF1 in neural adaptation and learning.
• To determine if YTHDF1 is essential for molecular, cellular, and behavioral adaptations.
• To explore YTHDF1 as a therapeutic target for pathological plasticity.

Main Methods:

• Investigated the function of YTHDF1 in dopamine receptor-expressing neurons using cell-type-specific deletion models.
• Assessed molecular, cellular, and behavioral adaptations in response to environmental changes.
• Examined the impact of YTHDF1 deficiency on cAMP-induced protein synthesis.

Main Results:

• mRNA m⁶A modifications and YTHDF1 are essential for adaptation to environmental changes.
• Deletion of YTHDF1 in specific neuronal populations impaired corresponding D1 or D2 receptor-dependent learning.
• YTHDF1 deficiency blocked cAMP-induced protein synthesis and learning in striatal neurons.
• YTHDF1 acts as a key mediator of m⁶A-dependent regulation in the striatum.

Conclusions:

• YTHDF1 is a critical regulator of adaptive and maladaptive learning through m⁶A-modified transcripts.
• YTHDF1 plays a cell-type-specific role in mediating learning.
• YTHDF1 represents a promising therapeutic target for preventing or treating pathological plasticity associated with neurological and psychiatric disorders.