TARPγ2-Derived Peptide Enhances Early-Phase Long-Term Potentiation and Impairs Memory Retention in Male Rats

Area of Science:

• Neuroscience
• Molecular Biology
• Pharmacology

Background:

• Disrupted AMPAR trafficking impairs synaptic plasticity and memory in neurological disorders.
• Arc protein interacts with TARPγ2, influencing AMPAR mobility and synaptic stability.

Purpose of the Study:

• Investigate the in vivo effects of the Arc-TARPγ2 interfering peptide RIPSYR.
• Analyze RIPSYR's protein interactions and functional impact on synaptic plasticity and memory.

Main Methods:

• In vivo electrophysiology and spatial memory assessments in male rats.
• Proteomic analysis (LC-MS) of peptide-protein interactions in synaptosome lysates.
• In silico docking to evaluate candidate binding partners.

Main Results:

• RIPSYR administration altered early-phase long-term potentiation at CA3 synapses.
• Impaired spatial memory retrieval after 24 h, indicating systemic effects on plasticity.
• Identified additional candidate binding partners for RIPSYR, suggesting broader modulatory roles.

Conclusions:

• RIPSYR impacts synaptic electrophysiology and spatial memory retrieval in vivo.
• The peptide's molecular interactions may extend beyond TARPγ2, influencing broader neural functions.
• Further investigation is required to elucidate the mechanisms underlying RIPSYR's effects.