Genomic dissection and prioritizing of candidate genes of QTL for regulating spontaneous arthritis on chromosome 1 in mice deficient for interleukin-1 receptor antagonist.

Abstract	Rheumatoid arthritis is a heterogeneous disease with clinical and biological polymorphisms. IL-1RN is a protein that binds to interleukin-1 (IL-1) receptors and inhibits the binding of IL-1-alpha and IL-1-beta. IL-1RN levels are elevated in the blood of patients with a variety of infectious, immune, and traumatic conditions. Balb/c mice deficient in IL-1ra (mouse gene of IL-1RN) develop spontaneous autoimmune arthritis while DBA/1 mice deficient in IL-1ra do not. Previously, we identified a major QTL that regulates the susceptibility to arthritis in Balb/c mice with IL-1ra deficiency. In this study, we found that the QTL may contain two peaks that are regulated by two sets of candidate genes. By haplotype analysis, the total genomic regions of candidate genes were reduced from about 19 Mbp to approximately 9 Mbp. The total number of candidate genes was reduced from 208 to 21.
Authors	Yanhong Cao, Jifei Zhang, Yan Jiao, Jian Yan, Feng Jiao, Xiaoyun Liu, Robert W Williams, Karen A Hasty, John M Stuart, Weikuan Gu
Journal	Journal of genetics (J Genet) Vol. 91 Issue 2 Pg. 119-28 (Aug 2012) ISSN: 0973-7731 [Electronic] India
PMID	22942082 (Publication Type: Journal Article, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov't, Research Support, U.S. Gov't, Non-P.H.S.)
Chemical References	Genetic Markers Il1rn protein, mouse Interleukin 1 Receptor Antagonist Protein Pla2g4a protein, mouse Prg4 protein, mouse Proteoglycans Ptgs2 protein, mouse Cyclooxygenase 2 Group IV Phospholipases A2
Topics	Animals Arthritis, Experimental (genetics, immunology) Arthritis, Rheumatoid (genetics, immunology) Chromosome Mapping Chromosomes, Mammalian Cyclooxygenase 2 (genetics, metabolism) Gene Expression Gene Regulatory Networks Genetic Association Studies Genetic Markers Group IV Phospholipases A2 (genetics, metabolism) Interleukin 1 Receptor Antagonist Protein (deficiency, genetics) Mice Mice, Inbred BALB C Mice, Inbred DBA Mice, Knockout Polymorphism, Single Nucleotide Proteoglycans (genetics, metabolism) Quantitative Trait Loci Spleen (metabolism) Transcriptome

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