Do Growth Hormone Peptides Work by Also Making the Stomach Release Ghrelin?
GHRP-6 and the oral GHS NN703 were concentrated in gastric tissue (where ghrelin is produced), raising the possibility that GH secretagogues partly work by stimulating endogenous ghrelin release from the stomach.
Quick Facts
What This Study Found
GHRP-6 and the oral GHS NN703 concentrated in rat gastric tissue containing ghrelin-producing cells, suggesting GH secretagogues may act partly by stimulating endogenous ghrelin release as a secondary mechanism.
Key Numbers
How They Did This
Animal study using radiolabeled GHRP-6 and NN703 for tissue distribution analysis in rats, focusing on gastric tissue accumulation relative to ghrelin-producing cell localization.
Why This Research Matters
If GH secretagogues stimulate the body's own ghrelin release, their effects would be more physiological and sustained than simple receptor mimicry, changing how we understand their mechanism.
The Bigger Picture
Understanding the full mechanism of GH secretagogues matters for optimizing therapy. If they work partly through ghrelin release, their effects depend on stomach function — which varies between patients.
What This Study Doesn't Tell Us
Tissue distribution doesn't prove ghrelin release stimulation. The stomach accumulation could reflect metabolism or excretion rather than receptor-mediated targeting. Ghrelin release was not directly measured.
Questions This Raises
- ?Does stomach GH secretagogue accumulation actually trigger ghrelin release?
- ?Would gastric bypass surgery reduce GH secretagogue effectiveness?
- ?Can this mechanism be exploited to develop better ghrelin-releasing agents?
Trust & Context
- Key Stat:
- Stomach accumulation Both GHRP-6 and oral NN703 concentrated in gastric tissue containing ghrelin cells — suggesting a ghrelin-releasing secondary mechanism
- Evidence Grade:
- Preliminary animal evidence from tissue distribution studies providing an intriguing but unproven mechanistic hypothesis.
- Study Age:
- Published in 2001. The question of whether GH secretagogues stimulate endogenous ghrelin remains active in the field.
- Original Title:
- Do growth hormone-releasing peptides act as ghrelin secretagogues?
- Published In:
- Endocrine, 14(1), 133-5 (2001)
- Authors:
- Ahnfelt-Rønne, I, Nowak, J(2), Olsen, U B
- Database ID:
- RPEP-00640
Evidence Hierarchy
Tests effects in animals (usually mice or rats), not humans.
What do these levels mean? →Frequently Asked Questions
Do GH peptides make your stomach release ghrelin?
This study suggests they might. Both GHRP-6 and an oral GH secretagogue concentrated in the stomach where ghrelin is produced. If they stimulate ghrelin release, their effects would be more natural and sustained.
Does this affect people who've had stomach surgery?
Potentially. If GH secretagogues partly work by triggering ghrelin release from the stomach, gastric bypass or sleeve surgery could reduce their effectiveness — an important clinical consideration.
Read More on RethinkPeptides
Cite This Study
https://rethinkpeptides.com/research/RPEP-00640APA
Ahnfelt-Rønne, I; Nowak, J; Olsen, U B. (2001). Do growth hormone-releasing peptides act as ghrelin secretagogues?. Endocrine, 14(1), 133-5.
MLA
Ahnfelt-Rønne, I, et al. "Do growth hormone-releasing peptides act as ghrelin secretagogues?." Endocrine, 2001.
RethinkPeptides
RethinkPeptides Research Database. "Do growth hormone-releasing peptides act as ghrelin secretag..." RPEP-00640. Retrieved from https://rethinkpeptides.com/research/ahnfelt-ronne-2001-do-growth-hormonereleasing-peptides
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkPeptides research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.