Galanin
Overview
Galanin is a 29 or 30 amino acid neuropeptide widely distributed throughout the central and peripheral nervous systems. It acts through three G protein-coupled receptor subtypes (GAL1, GAL2, and GAL3) to modulate neurotransmission, particularly in cholinergic, serotonergic, and noradrenergic pathways.
Mechanism of Action
The peptide has been implicated in cognitive processes, mood regulation, feeding behavior, and neuroprotection, making it a target of interest for neurodegenerative and psychiatric conditions.
Research Summary & Key Findings
Preclinical studies in rodent models have demonstrated that galanin modulates hippocampal acetylcholine release and affects performance in spatial learning tasks. Elevated galanin expression has been observed in postmortem brain tissue from patients with Alzheimer's disease, though the functional significance remains under investigation. No galanin-based therapeutics have advanced to late-stage clinical trials in cognitive disorders to date.
Clinical Status
Galanin is in the research phase with limited clinical data in humans. Current evidence is primarily derived from preclinical (animal or in vitro) studies.
Administration Routes
References
Primary literature
- PubMed — "Galanin"
Peer-reviewed literature indexed by the National Library of Medicine.
- ClinicalTrials.gov — "Galanin"
Registered interventional and observational studies, including status and phase.
- PubChem — "Galanin"
Chemical structure, molecular properties, and bioactivity data.
Study-level citations for this compound are being verified against the primary sources before publication. The database queries above return the current indexed literature in the meantime.
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