GluN2D NMDA Receptors: Bridging Physiology and Pathology

Area of Science:

• Neuroscience
• Molecular Biology
• Neuropharmacology

Background:

• NMDA receptors (NMDARs) mediate excitatory neurotransmission and are vital for brain development, synaptic plasticity, learning, and memory.
• NMDAR function is regulated by subunit heterogeneity, particularly different GluN2 subunits, which confer unique properties and fine-tune synaptic responses.
• The GluN2D subunit is less understood than GluN2A and GluN2B but shows distinct developmental and cell-type-specific expression patterns.

Purpose of the Study:

• To review the unique physiological and pharmacological properties of the GluN2D subunit.
• To underscore the growing significance of GluN2D in neuropsychiatric and neurological disorders.
• To highlight recent advances facilitating the study of GluN2D.

Main Methods:

• Review of existing literature on NMDA receptor subunit heterogeneity.
• Analysis of developmental and cell-type-specific expression patterns of GluN2D.
• Examination of recent pharmacological, genetic, and transgenic mouse model studies.

Main Results:

• GluN2D is broadly expressed during early development and becomes restricted to GABAergic interneurons in the adult brain.
• This expression pattern suggests a role for GluN2D in regulating excitatory-inhibitory balance and network activity.
• Recent breakthroughs have enabled detailed investigation into GluN2D's physiological and pathological functions.

Conclusions:

• The GluN2D subunit possesses unique properties that contribute to its specialized roles in the brain.
• Understanding GluN2D is crucial for comprehending normal brain function and the pathophysiology of neurological and psychiatric conditions.
• Further research into GluN2D is warranted due to its emerging significance in disease contexts.