Orphan receptor GPR158 controls stress-induced depression

Area of Science:

• Neuroscience
• Molecular Biology
• Psychiatry

Background:

• Chronic stress is linked to depression and anxiety, but underlying molecular mechanisms remain unclear.
• The prefrontal cortex (PFC) plays a crucial role in stress-responsive behaviors and mood regulation.

Purpose of the Study:

• To identify novel molecular regulators linking chronic stress to depression.
• To investigate the role of the orphan receptor GPR158 in the PFC in the context of depression.

Main Methods:

• Measured GPR158 levels in human subjects with major depressive disorder and in mice exposed to chronic stress.
• Utilized viral overexpression and gene ablation techniques in mice to assess GPR158 function in the PFC.
• Examined the impact of GPR158 on synaptic strength and AMPA receptor activity.

Main Results:

• GPR158 was significantly upregulated in the PFC of individuals with major depressive disorder.
• Chronic stress increased PFC GPR158 protein levels in a glucocorticoid-dependent manner.
• GPR158 overexpression induced depressive-like behaviors, while ablation produced antidepressant-like effects and stress resilience, mediated by altered AMPA receptor activity.

Conclusions:

• GPR158 is a novel regulator in the PFC that connects chronic stress to depression.
• GPR158 modulation of synaptic plasticity is a key mechanism in mood regulation.
• GPR158 represents a potential pharmacological target for the development of novel depression therapies.