Obestatin
Overview
Obestatin is a 23-amino acid peptide hormone derived from post-translational processing of the ghrelin gene product preproghrelin. It was initially proposed to oppose ghrelin's orexigenic effects by binding to the GPR39 receptor and promoting satiety, though this mechanism remains controversial.
Mechanism of Action
The peptide has been investigated for potential roles in regulating food intake, gastrointestinal motility, and metabolic homeostasis.
Research Summary & Key Findings
Initial reports in 2005 suggested anorectic activity in rodents, but subsequent replication studies yielded inconsistent results and questioned the GPR39 binding hypothesis. Multiple independent laboratories have failed to confirm the original satiety effects, and the physiological role of obestatin remains unclear. Current evidence does not support a clinically meaningful role in appetite regulation.
Clinical Status
Obestatin 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 — "Obestatin"
Peer-reviewed literature indexed by the National Library of Medicine.
- ClinicalTrials.gov — "Obestatin"
Registered interventional and observational studies, including status and phase.
- PubChem — "Obestatin"
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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