Stimulation of endogenous pulsatile growth hormone secretion by activation of growth hormone secretagogue receptor reduces the fat accumulation and improves the insulin sensitivity in obese mice.
Quick Facts
What This Study Found
Hexarelin (10.56 mcg/day continuous infusion) increased pulsatile GH secretion in MC4RKO obese mice, reducing visceral fat and liver triglycerides while improving insulin sensitivity without altering IGF-1 or insulin levels.
Key Numbers
10.56 mcg/day hexarelin; 3-4 weeks; increased pulsatile GH; reduced visceral fat; reduced liver TG; improved insulin sensitivity; no IGF-1/insulin change
How They Did This
MC4R knockout obese mice pair-fed and infused continuously with hexarelin (10.56 mcg/day) or vehicle via osmotic pump for 3-4 weeks. Pulsatile GH secretion, lipolysis, lipid oxidation, de novo lipogenesis, insulin sensitivity, glucose tolerance, and GH signaling gene expression measured.
Why This Research Matters
Obesity reduces GH secretion, creating a vicious cycle of more fat storage. Restoring pulsatile GH release with a small peptide could break this cycle without the side effects of direct GH injection (which raises IGF-1 and can worsen insulin resistance).
What This Study Doesn't Tell Us
Mouse model (MC4RKO, not typical human obesity). Pair-fed design controls for food intake but limits ecological validity. Continuous hexarelin infusion via pump is not practical for human use. Only 3-4 weeks of treatment. Hexarelin is not FDA-approved.
Trust & Context
- Original Title:
- Stimulation of endogenous pulsatile growth hormone secretion by activation of growth hormone secretagogue receptor reduces the fat accumulation and improves the insulin sensitivity in obese mice.
- Published In:
- FASEB journal : official publication of the Federation of American Societies for Experimental Biology, 35(1), e21269 (2021)
- Authors:
- Huang, Zhengxiang, Lu, Xuehan, Huang, Lili, Zhang, Chunhong, Veldhuis, Johannes D, Cowley, Michael A, Chen, Chen
- Database ID:
- RPEP-05455
Evidence Hierarchy
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Cite This Study
https://rethinkpeptides.com/research/RPEP-05455APA
Huang, Zhengxiang; Lu, Xuehan; Huang, Lili; Zhang, Chunhong; Veldhuis, Johannes D; Cowley, Michael A; Chen, Chen. (2021). Stimulation of endogenous pulsatile growth hormone secretion by activation of growth hormone secretagogue receptor reduces the fat accumulation and improves the insulin sensitivity in obese mice.. FASEB journal : official publication of the Federation of American Societies for Experimental Biology, 35(1), e21269. https://doi.org/10.1096/fj.202001924RR
MLA
Huang, Zhengxiang, et al. "Stimulation of endogenous pulsatile growth hormone secretion by activation of growth hormone secretagogue receptor reduces the fat accumulation and improves the insulin sensitivity in obese mice.." FASEB journal : official publication of the Federation of American Societies for Experimental Biology, 2021. https://doi.org/10.1096/fj.202001924RR
RethinkPeptides
RethinkPeptides Research Database. "Stimulation of endogenous pulsatile growth hormone secretion..." RPEP-05455. Retrieved from https://rethinkpeptides.com/research/huang-2021-stimulation-of-endogenous-pulsatile
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.