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pubmed:abstractText |
Recent studies of 2 complex diseases, rheumatoid arthritis (RA) and Crohn's disease (CD), showed associations with genes mapping to the cytokine gene cluster on 5q31. In particular, a functional single-nucleotide polymorphism (SNP) mapping to intron 1 of the organic cation transporter 1 (OCTN1; SLC22A4) gene was associated with RA in a Japanese population, and a haplotype of a different SNP in the same gene and one in an adjacent gene, OCTN2 (SLC22A5), was associated with CD. The purpose of this study was to investigate the association between the OCTN locus and RA in a Caucasian population.
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