Abstract:
:Sarcoidosis is known to be a systemic granulomatous disorder characterized by a cell-mediated Th1-type inflammatory response. To identify a key genetic factor in the pathogenesis of sarcoidosis, we investigated single nucleotide polymorphisms within 10 candidate genes involved in type 1 immune process ( IFNA17, IFNB, IFNG, IFNGR1, IFNGR2, IL12B, IL12RB1, IL12RB2, ETA-1, and NRAMP1) in an association-based study of 102 Japanese patients with sarcoidosis, 114 with tuberculosis, and 110 control subjects. After correction for multiple testing, an IFNA17 polymorphism (551T-->G) was found to be associated with susceptibility to sarcoidosis (odds ratio 3.27 [95% CI: 1.44-7.46], P=0.004, P(c)=0.04), but not to tuberculosis. We observed no significant associations with the other polymorphisms of the Th1-related genes. We further typed another IFNA polymorphism ( IFNA10 60T-->A) and confirmed two major haplotypes of the IFNA gene, viz., allele 1: IFNA10 [60T]- IFNA17 [551T] and allele 2: IFNA10 [60A]- IFNA17 [551G], in the Japanese population. In healthy subjects, IFNA allele 2, which is over-represented in patients with sarcoidosis, was significantly associated with increased IFN-alpha and IL-12p70 production induced by Sendai virus in vitro. This study suggests that possession of the IFNA allele with higher levels of IFN-alpha significantly increases the risk of sarcoidosis.
journal_name
Hum Genetjournal_title
Human geneticsauthors
Akahoshi M,Ishihara M,Remus N,Uno K,Miyake K,Hirota T,Nakashima K,Matsuda A,Kanda M,Enomoto T,Ohno S,Nakashima H,Casanova JL,Hopkin JM,Tamari M,Mao XQ,Shirakawa Tdoi
10.1007/s00439-004-1099-5keywords:
subject
Has Abstractpub_date
2004-04-01 00:00:00pages
503-9issue
5eissn
0340-6717issn
1432-1203journal_volume
114pub_type
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