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Cytotoxic T Lymphocyte Antigen–4 +49A/G polymorphism does not affect susceptibility to autoimmune hepatitis
Author(s) -
Gerven Nicole M. F.,
Boer Ynto S.,
Zwiers Antonie,
Hoek Bart,
Erpecum Karel J.,
Beuers Ulrich,
Buuren Henk R.,
Drenth Joost P. H.,
den Ouden Jannie W.,
Verdonk Robert C.,
Koek Ger H.,
Brouwer Johannes T.,
Guichelaar Maureen M. J.,
Vrolijk Jan M.,
Kraal G.,
Mulder Chris J. J.,
Nieuwkerk Carin. M. J.,
Bouma Gerd
Publication year - 2013
Publication title -
liver international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.873
H-Index - 110
eISSN - 1478-3231
pISSN - 1478-3223
DOI - 10.1111/liv.12157
Subject(s) - single nucleotide polymorphism , genotype , autoimmune hepatitis , immunology , cytotoxic t cell , allele , medicine , snp , allele frequency , cohort , biology , hepatitis , genetics , gene , in vitro
Background & Aims Single nucleotide polymorphisms ( SNP ) in the Cytotoxic T lymphocyte antigen‐4 gene ( CTLA ‐4 ) have been associated with several autoimmune diseases including autoimmune Hepatitis ( AIH ). In this chronic idiopathic inflammatory liver disease, conflicting results have been reported on the association with a SNP at position +49 in the CTLA ‐4 gene in small patient cohorts. Here, we established the role of this SNP in a sufficiently large cohort of AIH patients. Methods The study population consisted of 672 AIH patients derived from academic and regional hospitals in the Netherlands and was compared with 500 controls selected from the ‘Genome of the Netherlands’ project cohort. Genotype frequencies were assessed by PCR for patients and by whole genome sequencing for controls. Results No significant differences in allele frequencies were found between patients and controls (G Allele: 40% vs 39%, P = 0.7). Similarly, no significant differences in genotype frequencies between patients and controls were found. Finally, there was no relation between disease activity and the G allele or AG and GG genotypes. Conclusion The Cytotoxic T Lymphocyte Antigen‐4 +49 A/G polymorphism does not represent a major susceptibility risk allele for AIH in Caucasians and is not associated with disease severity at presentation.