The Study
In Vitro Metabolic Stability of Exendin-4: Pharmacokinetics and Identification of Cleavage Products
This study is like watching how a medicine breaks down in a test tube filled with mashed-up rat liver and kidney. It shows what happens in the lab, but not in a real animal or person.
Analysis score
Maximum 44 for a cross-sectional study.
Where the score came from
This study looks at how fast a medicine called exendin-4 breaks down in parts of a rat’s body, like the liver and kidney.
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 58 / 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.
- 1Even though the drug breaks down fast in the kidney, its design helps it last longer in the body than similar hormones, which is good for treating diabetes.
- 2In a test tube, exendin-4 lasted 7.8 minutes in kidney goo and 100.9 minutes in liver goo.
- 3The body cuts it at different spots depending on the organ.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
PLoS ONE
Year
2015
Authors
S. Liao, Yuanjun Liang, Zhiwei Zhang, Jinglai Li, Juan Wang, Xiaoying Wang, G. Dou, Zhenqing Zhang, Keliang Liu
Related Content
Claims (6)
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.
When scientists studied a lab-made version of a hormone in rat kidney mixtures, they found it breaks apart at two specific spots, creating two smaller pieces as the first step in its breakdown.
In rats, the body breaks down a substance called exendin-4 differently in the kidneys and liver — the kidneys chop it up in several places early on, while the liver makes one main cut first and then trims the ends.
In rat tissues, certain enzymes probably break down a peptide called exendin-4, and scientists saw that blocking those enzymes slowed the breakdown in lab tests.
In lab tests with rat tissues, a substance called exendin-4 breaks down way faster in the kidney than in the liver — just a few minutes in the kidney versus over an hour and a half in the liver.
When scientists break down the drug exendin-4 in a lab dish using rat liver bits, it mostly gets chopped at one specific spot, making a smaller piece called exendin-4(12–39).
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.