Sigma-2 receptor ligands: neurobiological effects

Area of Science:

• Neuroscience
• Pharmacology
• Molecular Biology

Background:

• The sigma-2 receptor is a widely distributed protein implicated in cell proliferation and tumor pathogenesis.
• Its role extends to modulating cytosolic Ca2+ concentration, dopaminergic transmission, and addiction behaviors.
• Despite not being cloned, high-affinity ligands have been identified.

Purpose of the Study:

• To review selective sigma-2 receptor ligands.
• To discuss their neuropsychological effects.
• To explore molecular probes for tracing sigma-2 receptors in the central nervous system.

Main Methods:

• Photoaffinity labeling to determine molecular size (approx. 18 kDa).
• Identification and characterization of selective sigma-2 receptor ligands.
• Review of existing literature on ligand effects and molecular probes.

Main Results:

• Tens of high-affinity and selective sigma-2 receptor ligands have been identified.
• Some ligands, like ditolylguanidine and afobazole, exhibit neuroprotective effects.
• Sigma-2 receptor ligands influence addiction behavior and neurotransmission.

Conclusions:

• Selective sigma-2 receptor ligands represent a promising class of compounds for neurological and psychiatric conditions.
• Further research into these ligands and molecular probes can advance understanding and treatment of CNS disorders.
• The sigma-2 receptor's modulation of key cellular and neural processes highlights its therapeutic potential.