Modifier loci condition autoimmunity provoked by Aire deficiency.

Modifier loci condition autoimmunity provoked by Aire deficiency.
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DOI:
10.1084/jem.20050693
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发表时间:
2005-09-19
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Benoist C
Benoist C
中科院分区:
其他
文献类型:
--
作者:
Jiang W;Anderson MS;Bronson R;Mathis D;Benoist C

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自身免疫性多内分泌病-念珠菌病-外胚层营养不良患者和突变小鼠的自身免疫调节(Aire)基因的功能突变丧失导致自身免疫表现,这些表现作为单基因特征分离,但在靶器官的谱上有广泛的变化。为了研究这种变异的原因,将Aire基因敲除突变回交到不同遗传背景的小鼠身上。背景基因座强烈影响被靶向器官的模式(胃、眼、胰腺、肝脏、卵巢、甲状腺和唾液腺)和靶向的严重程度(在非肥胖糖尿病背景中尤其强烈,但在C57BL/6背景中非常轻微)。自身抗体模仿疾病模式,对几种抗原的寡克隆反应性在缺乏空气的菌株之间有所不同。同源分析和全基因组扫描显示,对每个器官的自身免疫具有独特的遗传控制模式,并确定了几个控制靶向模式的区域,包括主要的组织相容性复合体和Chr1和Chr3区域,这些区域先前在控制1型糖尿病中被发现。
Loss of function mutations in the autoimmune regulator (Aire) gene in autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy patients and mutant mice lead to autoimmune manifestations that segregate as a monogenic trait, but with wide variation in the spectrum of organs targeted. To investigate the cause of this variability, the Aire knockout mutation was backcrossed to mice of diverse genetic backgrounds. The background loci strongly influenced the pattern of organs that were targeted (stomach, eye, pancreas, liver, ovary, thyroid, and salivary gland) and the severity of the targeting (particularly strong on the nonobese diabetic background, but very mild on the C57BL/6 background). Autoantibodies mimicked the disease pattern, with oligoclonal reactivity to a few antigens that varied between Aire-deficient strains. Congenic analysis and a whole genome scan showed that autoimmunity to each organ had a distinctive pattern of genetic control and identified several regions that controlled the pattern of targeting, including the major histocompatibility complex and regions of Chr1 and Chr3 previously identified in controlling type 1 diabetes.
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