Related Experiment Video
Updated: May 15, 2025

LDL Cholesterol Uptake Assay Using Live Cell Imaging Analysis with Cell Health Monitoring
Published on: November 17, 2018
HDL cholesterol esters mediate the genetic link between sedentary behavior and urological cancers: Insights from
Junhao Chen1, Junxian Zhao2, Jieming Zuo1
1Department of Urology, The Second Affiliated Hospital of Kunming Medical University, Kunming, China.
Abstract:
This study explores the causal relationship between sedentary behavior and urological cancers, focusing on bladder cancer (BC), prostate cancer, and kidney cancer, using Bayesian Mendelian randomization and mediation analysis. A two-sample Mendelian randomization (MR) framework was employed, using genetic variants as instrumental variables. Bayesian and multivariate MR assessed causal effects of sedentary behaviors (TV watching, computer use, driving) on urological cancers. Sensitivity analyses (MR-Egger, MR-PRESSO, and Cochran Q) ensured robustness. Mediation analysis identified high-density lipoprotein (HDL) cholesterol ester levels as a primary mediator, validated through meta-analysis. Prolonged TV watching was significantly associated with increased BC risk (OR = 2.908; 95% CI = 1.221-6.930; P = .015). Mediation analysis showed small HDL cholesterol ester levels mediated 17.5% of this effect. No causal relationships were observed between computer use or driving and the cancers. Sensitivity analyses confirmed robust findings without heterogeneity or pleiotropy. Prolonged TV watching increases BC risk, mediated by small HDL cholesterol ester levels. Sedentary behavior is a modifiable risk factor, highlighting the importance of lifestyle interventions in prevention.
Related Concept Videos
Cholesterol: Significance and Regulation
Considering cholesterol and...
Cancer Prevention
Some...
Cancer
Lipid-Lowering Drugs: Statins and Miscellaneous Agents
Blood Studies for Cardiovascular System III: Serum Lipid Profile
Serum lipids are fats and fatty substances in the blood and are crucial for various bodily functions, including energy storage, cellular structure, and hormone production. Serum lipids consist of cholesterol, triglycerides, and phospholipids.
Cholesterol is a soft, fat-like substance found in all body cells. It is crucial for producing hormones, vitamin D, and substances that aid...
Internal Receptors

