Association Between HLA Haplotypes and Increased Serum Levels of IgG4 in Patients With Primary Sclerosing Cholangitis.
case_control · Level III
Where this comes from
- Record sourced from PubMed, PMID 25655558.
- Also identified by DOI 10.1053/j.gastro.2015.01.041 and PMC identifier 4409500.
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Abstract
Increased serum levels of IgG4 have been reported in 9%-15% of patients with primary sclerosing cholangitis (PSC); it is not clear whether this increase contributes to pathogenesis. We performed genetic analyses of the HLA complex in patients with PSC from Norway, Sweden, and from the United States. We found an association between levels of IgG4 above the upper reference limit and specific HLA haplotypes. These patients had a significantly lower frequency of the strongest PSC risk factor, HLA-B*08, than patients without increased IgG4, and significantly higher frequencies of HLA-B*07 and HLA-DRB1*15. HLA genotype therefore might affect the serum concentration of IgG4, and increased IgG4 might be a marker of a distinct phenotype of PSC.
Medical subject headings
- Cholangitis, Sclerosing
- HLA Antigens
- Haplotypes
- Immunoglobulin G