The Study
Excess membrane cholesterol alters human gallbladder muscle contractility and membrane fluidity.
This study looked at gallbladder tissue from people with gallstones and found that their cell membranes had more cholesterol and didn't squeeze as well. But it didn't test if the cholesterol caused the problem — it just saw that both things happened together.
Analysis score
Maximum 44 for a cross-sectional study.
Where the score came from
When there's too much cholesterol in the gallbladder muscle cells, the cells get stiff and can't squeeze well. Taking out the extra cholesterol makes them squeeze again.
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 520 / 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 — if the gallbladder can't squeeze, it can't empty bile properly, which may cause pain and stones.
- 2Membrane cholesterol doubled relative to phospholipids; muscle couldn't contract properly; fixing cholesterol fixed contraction.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Gastroenterology
Year
1999
Authors
Qian Chen, J. Amaral, P. Biancani, J. Behar
Related Content
Claims (3)
Cholesterol makes up about half of the fatty material in the outer layer of your body's cells, and it helps keep that layer flexible, strong, and able to control what comes in and out.
When doctors remove extra cholesterol from the muscle cells in the gallbladder of people with gallstones, the gallbladder starts contracting better again—this means the amount of cholesterol in those cells can be turned up or down to fix how well the gallbladder works.
People with gallstones made of cholesterol have stiffer cell membranes in their gallbladder muscles, which might make the gallbladder less able to squeeze and empty properly.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.