SNP Analysis in Primary Biliary Cirrhosis
Author Information
Author(s): SABINE OERTELT, THOMAS P. KENNY, CARLO SELMI, PIETRO INVERNIZZI, MAURO PODDA, M. ERIC GERSHWIN
Primary Institution: University of California at Davis and University of Milan
Hypothesis
Single nucleotide polymorphisms (SNPs) of genes involved in lymphocyte proliferation would be responsible for uncontrolled expansion of T cells and autoreactivity.
Conclusion
The study found a significant decrease in homozygosity for the CTLA-4 allele in patients with primary biliary cirrhosis compared to controls.
Supporting Evidence
- A significant association was found between the CTLA-4 allele and anti-mitochondrial antibody serum negativity.
- Decreased homozygosity of the A allele in patients with PBC was observed.
- LYP*T allele was associated with serum AMA negativity.
Takeaway
Researchers looked at genes that might cause problems in the immune system of people with a liver disease called primary biliary cirrhosis, and found some genetic differences between sick people and healthy ones.
Methodology
DNA from 154 patients with primary biliary cirrhosis and 166 healthy controls was genotyped for SNPs of five candidate genes using a TaqMan assay.
Potential Biases
Potential bias due to the small sample size of specific subgroups.
Limitations
The study had a limited number of AMA-negative subjects, which may affect the generalizability of the findings.
Participant Demographics
154 patients with primary biliary cirrhosis (142 females, 12 males) and 166 healthy controls (160 females, 6 males), average age 66 years.
Statistical Information
P-Value
0.0411
Confidence Interval
0.2807-0.8784
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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