The Study
The C-terminal extension of exendin-4 provides additional metabolic stability when added to GLP-1, while there is minimal effect of truncating exendin-4 in anaesthetized pigs.
This study shows what happened to different versions of a hormone in pigs' bodies, but it doesn't prove that one part caused the changes. It's like watching how fast different toys sink in water — you can see differences, but you can't say for sure why without more testing.
Analysis score
Maximum 44 for a cross-sectional study.
Where the score came from
Scientists tested how long different sugar-control medicines last in pigs. One medicine comes from a lizard's spit and lasts longer than the body's own version. They tried adding a special tail from the lizard medicine to the human version and saw it lasted longer. But cutting off that tail from the lizard medicine didn't make it work faster.
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 514 / 100
Quality score
Snapshots of a population at a single point in time, or descriptions of small groups. Can identify correlations and prevalence, but cannot determine cause and effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes, this matters because longer-lasting medicines mean fewer shots for people with diabetes.
- 2The human medicine lasted about 5 minutes.
- 3With the lizard's tail added, it lasted 19.5 minutes.
- 4The lizard medicine lasted 32 minutes, and even without its tail, it still lasted 28 minutes.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Regulatory peptides
Year
2013
Authors
Lene Simonsen, J. Holst, K. Madsen, C. F. Deacon
Related Content
Claims (4)
In pigs under anesthesia, adding a small piece from a lizard hormone to a blood sugar hormone makes it last much longer in the body.
Cutting off the end of a hormone called exendin-4 doesn’t make it break down faster in anesthetized pigs, so that part probably doesn’t matter much for how long the hormone lasts in their bodies.
A chemical from Gila monster spit lasts longer in the body than a natural hormone because it doesn’t break down as quickly, so it keeps working longer to control blood sugar.
In pigs under anesthesia, certain diabetes-related peptides like exendin-4 are removed from the body only by the kidneys, while others like GLP-1 are cleared by both the kidneys and other body tissues — showing they leave the body in different ways.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.