Obestatin

Obestatin is a peptide encoded by the ghrelin gene, used in research to investigate its debated role in metabolic and gastrointestinal function.

Length: 23 amino acids
Half-life: Not well characterised
Mechanism: Initially proposed to be a ligand for the G protein-coupled receptor GPR39, though its physiological receptor and function remain subjects of ongoing scientific debate.
Studied in: Utilised in gastroenterology and metabolic research to clarify its controversial role in regulating gut motility, appetite, and cell proliferation.

About Obestatin

Obestatin is a 23-amino acid peptide hormone identified in 2005. It is encoded by the same preproghrelin gene that produces ghrelin, suggesting a related or opposing function in metabolic regulation. Despite being co-expressed with ghrelin, its precise physiological role has been a topic of considerable research and discussion.

The initial report suggested obestatin acted as an antagonist to ghrelin's effects via the orphan receptor GPR39. However, subsequent studies have yielded conflicting results, with many failing to confirm this interaction. Current research uses synthetic obestatin to explore its potential effects on gastric emptying, pancreatic function, and cellular apoptosis, in an effort to finally elucidate its primary mechanism and receptor.

Laboratory notes

The literature on obestatin's mechanism and receptor is conflicting; researchers should critically review primary sources when designing experiments.
As it is derived from the same precursor as ghrelin, comparative studies using both peptides can provide valuable context.
For GPR39 receptor studies, use of cell lines with confirmed, high-level expression of the receptor is critical for reproducible results.

Storage and reconstitution basics: storage guide.

Questions about Obestatin

What is the relationship between obestatin and ghrelin?

Both peptides are produced from the same gene (the preproghrelin gene) through post-translational processing.

What is the accepted receptor for obestatin?

There is no universally accepted receptor. While GPR39 was initially proposed, this link is now considered controversial and unconfirmed by many research groups.

What is the primary focus of current obestatin research?

Current research aims to definitively identify its physiological receptor and clarify its biological functions, which may or may not be related to appetite regulation.

Is Obestatin for human use?

No. It is supplied strictly for in-vitro laboratory research and is not for human or animal consumption.

Related research peptides

All products are sold for laboratory research use only. Not for human consumption, not a medicine, not for diagnosing, treating or preventing any condition.