Project/Area Number |
23591450
|
Research Category |
Grant-in-Aid for Scientific Research (C)
|
Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
膠原病・アレルギー・感染症内科学
|
Research Institution | Toin University of Yokohama |
Principal Investigator |
|
Co-Investigator(Kenkyū-buntansha) |
大辻 希樹 桐蔭横浜大学, 医用工学部, 専任講師 (30398664)
|
Co-Investigator(Renkei-kenkyūsha) |
広瀬 幸子 順天堂大学, 医学部, 准教授 (00127127)
|
Project Period (FY) |
2011 – 2013
|
Project Status |
Completed (Fiscal Year 2013)
|
Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2011: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
|
Keywords | 全身性エリテマトーデス / SLE / 全身性自己免疫疾患 / 疾患感受性遺伝子 / 遺伝連鎖解析 / QTL解析 / 多因子疾患 / 免疫寛容 / Fcgr2b / FcgRIIB / MHC class II / 自己免疫疾患 / NZB mice / NZW mice / 自己免役疾患 |
Research Abstract |
In contrast to normal mice, autoimmune-prone New Zealand Black (NZB) mice are defective in susceptibility to tolerance induced by deaggregated bovine gamma globulin (DBGG). Susceptibility loci for this defect were examined by genome-wide analysis using F2 intercross of non-autoimmune C57BL/6 (B6) and NZB mice. One NZB locus on the telomeric chromosome 1, designated Dit (Defective immune tolerance)-1, showed a highly significant linkage. This locus overlapped with t a locus coding for polymorphic Fcgr2b and Slam family genes. The similar defective tolerance was observed in Fcgr2b-deficient mice with autoimmune-type Slam family genes, but not in Fcgr2b-deficient mice with normal C57BL/6-type Slam family genes indicating that epistatic interaction of both polymorphic genes is involved. Thus, this epistatic interaction is likely playing a pivotal role in the genetic predisposition to autoimmunity in NZB and related autoimmune-prone strains inclusing SLE model (NZB x NZW) F1 mice.
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