Ghrelin Is Essential for the Body's Normal Defense Against Insulin-Induced Low Blood Sugar
Mice lacking acyl-ghrelin had an impaired counterregulatory response to insulin-induced hypoglycemia, showing that ghrelin is permissive for normal blood sugar recovery.
Quick Facts
What This Study Found
Ghrelin knockout mice showed impaired counterregulatory responses to insulin-induced hypoglycemia, demonstrating that acyl-ghrelin is permissive for normal blood sugar recovery during hypoglycemic episodes.
Key Numbers
10-fold higher GIR in ghrelin-KO; blunted corticosterone and GH; HM01 reduced GIR and increased corticosterone and GH
How They Did This
Used ghrelin knockout mice subjected to insulin-induced hypoglycemia. Measured counterregulatory hormone responses, blood glucose recovery, and compared to wild-type controls.
Why This Research Matters
Hypoglycemia is a major risk for diabetic patients on insulin. Understanding ghrelin's role in blood sugar defense could lead to new strategies to prevent dangerous hypoglycemic episodes.
The Bigger Picture
This adds ghrelin to the known components of the body's hypoglycemia defense system (glucagon, epinephrine, cortisol, growth hormone), revealing a more complex regulatory network than previously appreciated.
What This Study Doesn't Tell Us
Mouse study — knockout models may not perfectly predict human ghrelin deficiency. Small sample. Complete ghrelin absence is more extreme than natural variation in ghrelin levels.
Questions This Raises
- ?Do diabetic patients with lower ghrelin levels have worse hypoglycemia awareness?
- ?Could ghrelin agonists help prevent severe hypoglycemia in insulin-treated diabetics?
- ?How does ghrelin interact with other counterregulatory hormones during blood sugar defense?
Trust & Context
- Key Stat:
- Permissive for blood sugar defense Without ghrelin, mice cannot mount a normal counterregulatory response when blood sugar drops dangerously low
- Evidence Grade:
- Moderate — well-designed knockout mouse study with clear physiological endpoints, but small sample and species differences apply.
- Study Age:
- Published in 2020; ghrelin's role in glucose counterregulation continues to be explored.
- Original Title:
- Acyl-ghrelin Is Permissive for the Normal Counterregulatory Response to Insulin-Induced Hypoglycemia.
- Published In:
- Diabetes, 69(2), 228-237 (2020)
- Authors:
- Shankar, Kripa(3), Gupta, Deepali(3), Mani, Bharath K(4), Findley, Brianna G, Lord, Caleb C, Osborne-Lawrence, Sherri, Metzger, Nathan P, Pietra, Claudio, Liu, Chen, Berglund, Eric D, Zigman, Jeffrey M
- Database ID:
- RPEP-05124
Evidence Hierarchy
Frequently Asked Questions
Why is hypoglycemia dangerous?
Severely low blood sugar deprives the brain of fuel, causing confusion, seizures, and potentially death. The body normally has protective mechanisms to prevent this, but they can fail in diabetic patients on insulin.
How could ghrelin help prevent low blood sugar?
Ghrelin helps coordinate the body's emergency response to rising insulin and falling blood sugar. If ghrelin or its signaling could be enhanced during insulin therapy, it might provide an extra safety net against dangerous hypoglycemia.
Read More on RethinkPeptides
Cite This Study
https://rethinkpeptides.com/research/RPEP-05124APA
Shankar, Kripa; Gupta, Deepali; Mani, Bharath K; Findley, Brianna G; Lord, Caleb C; Osborne-Lawrence, Sherri; Metzger, Nathan P; Pietra, Claudio; Liu, Chen; Berglund, Eric D; Zigman, Jeffrey M. (2020). Acyl-ghrelin Is Permissive for the Normal Counterregulatory Response to Insulin-Induced Hypoglycemia.. Diabetes, 69(2), 228-237. https://doi.org/10.2337/db19-0438
MLA
Shankar, Kripa, et al. "Acyl-ghrelin Is Permissive for the Normal Counterregulatory Response to Insulin-Induced Hypoglycemia.." Diabetes, 2020. https://doi.org/10.2337/db19-0438
RethinkPeptides
RethinkPeptides Research Database. "Acyl-ghrelin Is Permissive for the Normal Counterregulatory ..." RPEP-05124. Retrieved from https://rethinkpeptides.com/research/shankar-2020-acylghrelin-is-permissive-for
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.