The Study
Endothelin-1 inhibits insulin-stimulated glucose uptake in isolated rat adipocytes.
This study looked at fat cells from rats in a dish and saw that a certain chemical made them less responsive to insulin. It doesn't prove this happens in people or in the body — just in a test tube.
Analysis score
Maximum 58 for a case-control study.
Where the score came from
A chemical called endothelin-1 stops insulin from helping fat cells take in sugar, even though insulin can still bind to its receptor.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 56 / 100
Quality score
Researchers compare people who have a condition (cases) with similar people who do not (controls), looking back in time for differences in exposure. Useful but more prone to bias.
Key takeaways
Summary
Based on the study abstract and findings.
- 1This suggests endothelin-1 might interfere with how fat cells respond to insulin, potentially contributing to insulin resistance.
- 2Endothelin-1 binds to fat cells at 350 pM affinity with 69,000 sites per cell and blocks insulin’s sugar-uptake effect without changing insulin binding.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Biochemical and biophysical research communications
Year
1994
Authors
Y. Chou, J. Perng, C. Juan, S. Jang, C. Kwok, W. Chen, J. Fong, L. Ho
Related Content
Claims (3)
Endothelin-1 reduces the ability of insulin to promote glucose uptake into cells by interfering with the cytoskeletal changes that move GLUT4 transporters to the cell surface.
Endothelin-1 reduces the ability of insulin to promote glucose uptake in fat cells from rats, even though it does not affect how insulin binds to its receptor, meaning the interference occurs after insulin binds.
Rat fat cells contain one type of receptor that binds endothelin-1 with high affinity, at a concentration of 350 picomolar and 69,000 receptors per cell.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.