Related Experiment Video
Updated: May 5, 2026
04:38
Partial Bile Duct Ligation in the Mouse: A Controlled Model of Localized Obstructive Cholestasis
Published on: March 28, 2018
15.5K
Genome-wide association analysis in primary sclerosing cholangitis
Tom H Karlsen1, Andre Franke, Espen Melum
1Medical Department, Rikshospitalet University Hospital and University of Oslo, 0027 Oslo, Norway. t.h.karlsen@klinmed.uio.no
Gastroenterology
|December 1, 2009
Summary
This study identifies key genetic factors contributing to primary sclerosing cholangitis (PSC) susceptibility. Strong associations near HLA-B and other inflammatory genes highlight the complex genetic architecture of PSC.
Area of Science:
- Genetics
- Immunology
- Gastroenterology
Background:
- Primary sclerosing cholangitis (PSC) is a chronic liver disease with a significant genetic component.
- Understanding the genetic susceptibility to PSC is crucial for developing targeted therapies.
Purpose of the Study:
- To characterize the genetic susceptibility to primary sclerosing cholangitis (PSC).
- To identify single nucleotide polymorphism (SNP) markers associated with PSC risk through genome-wide association analysis.
Main Methods:
- Genome-wide association analysis of 443,816 SNPs in 285 Norwegian PSC patients and 298 controls.
- Replication of associations in independent case-control cohorts from Scandinavia, Belgium/The Netherlands, and Germany.
- Functional investigation of candidate genes using lentiviral silencing in cholangiocytes.
Main Results:
- Strongest associations detected near HLA-B at chromosome 6p21 (e.g., rs3099844, rs2844559) with significant odds ratios.
- Significant association found at chromosome 13q31 (rs9524260), with glypican 6 upregulation observed upon silencing.
- Replication of associations at chromosomes 2q35 and 3p21, suggesting roles for G-protein-coupled bile acid receptor 1 and macrophage-stimulating 1.
Conclusions:
- Genetic susceptibility to PSC is significantly influenced by HLA region associations.
- Genes involved in bile homeostasis and other inflammatory conditions are key components of PSC's genetic architecture.
- These findings provide insights into the underlying mechanisms of PSC and potential therapeutic targets.
Related Concept Videos
01:11Genome-wide Association Studies-GWAS
12.6K
Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
GWAS does not require the identification of the target gene involved in...
12.6K
01:20Cholecystitis
29
Cholecystitis is inflammation of the gallbladder, most commonly caused by obstruction of the cystic duct. This blockage prevents bile from draining, leading to gallbladder distension, inflammation, and potentially serious complications. This condition may present acutely or chronically and can happen with or without gallstones.EtiologyAbout 95% of cholecystitis cases are calculous, caused by gallstones blocking the cystic duct, leading to bile accumulation and inflammation of the gallbladder...
29