A novel GHS-R1a antagonist blocked ghrelin-induced GH secretion but paradoxically stimulated appetite, revealing complex receptor pharmacology where blocking the receptor for one function doesn't block all functions.
Key findingA novel GHS-R1a antagonist blocked ghrelin-induced GH release but paradoxically increased food intake, suggesting inverse agonism or biased antagonism
What the researchers found
A novel GHS-R1a antagonist blocked ghrelin-induced GH release but paradoxically increased food intake, suggesting inverse agonism or biased antagonism at the constitutively active receptor — complex pharmacology where blocking one ghrelin function doesn't block another.
Why it matters
Relevant for ghrp, weight-loss, hormone-optimization, receptor-signaling.
How the study worked
animal-study study on ghrp, weight-loss.
What this study cannot tell us
See abstract.
How to read the evidence
moderate evidence.
When this study was published
Published in 2005.
The bigger picture
Advances peptide research with clinical implications.
Questions still open
- Further research needed.
- Clinical translation to evaluate.
Common questions
What was studied?
What was found?
Read the original research
A novel growth hormone secretagogue-1a receptor antagonist that blocks ghrelin-induced growth hormone secretion but induces increased body weight gain.
Neuroendocrinology, 81(5), 339-49
Citation
Halem, Heather A; Taylor, John E; Dong, Jesse Z; Shen, Yeelana; Datta, Rakesh; Abizaid, Alfonso; Diano, Sabrina; Horvath, Tamas L; Culler, Michael D. (2005). A novel growth hormone secretagogue-1a receptor antagonist that blocks ghrelin-induced growth hormone secretion but induces increased body weight gain.. Neuroendocrinology, 81(5), 339-49.