Anti transglutaminase antibodies cause ataxia in mice.

Anti transglutaminase antibodies cause ataxia in mice.
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DOI:
10.1371/journal.pone.0009698
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发表时间:
2010-03-15
期刊:
影响因子:
3.7
通讯作者:
Tongiorgi E
Tongiorgi E
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Boscolo S;Lorenzon A;Sblattero D;Florian F;Stebel M;Marzari R;Not T;Aeschlimann D;Ventura A;Hadjivassiliou M;Tongiorgi E

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乳糜泻(CD)是一种自身免疫性胃肠道疾病,其特征在于存在抗转氨酶2(TG 2)和抗麦胶蛋白抗体。在与CD相关的神经功能障碍中,共济失调是最常见的一种。我们用免疫组化方法分析了20例CD患者血清中的抗神经反应性。为了确定抗TG 2抗体在共济失调中的作用,从噬菌体展示伊加抗体库中分离的两个抗TG 2单链可变片段(scFv)通过免疫组织化学和ELISA进行表征,并注射小鼠以研究其对运动协调的影响。我们发现,75%的CD患者人群没有神经系统受累的证据,有循环抗神经伊加和/或IgG抗体。从一名CD患者克隆的两个抗TG 2 scFv染色血管,但只有一个与神经元反应。该抗TG 2抗体显示与转氨酶同工酶TG 3和TG 6的交叉反应性。脑室内注射抗TG 2或抗TG 2/3/6交叉反应性scFv在小鼠中引起短暂的、同等强度的共济失调。CD患者的血清中含有抗TG 2、TG 3和TG 6抗体,可能会导致共济失调。
Celiac disease (CD) is an autoimmune gastrointestinal disorder characterized by the presence of anti-transglutaminase 2 (TG2) and anti-gliadin antibodies. Amongst the neurological dysfunctions associated with CD, ataxia represents the most common one. We analyzed by immunohistochemistry, the anti-neural reactivity of the serum from 20 CD patients. To determine the role of anti-TG2 antibodies in ataxia, two anti-TG2 single chain variable fragments (scFv), isolated from a phage-display IgA antibody library, were characterized by immunohistochemistry and ELISA, and injected in mice to study their effects on motor coordination. We found that 75% of the CD patient population without evidence of neurological involvement, has circulating anti-neural IgA and/or IgG antibodies. Two anti-TG2 scFvs, cloned from one CD patient, stained blood vessels but only one reacted with neurons. This anti-TG2 antibody showed cross reactivity with the transglutaminase isozymes TG3 and TG6. Intraventricular injection of the anti-TG2 or the anti-TG2/3/6 cross-reactive scFv provoked transient, equally intensive ataxia in mice. The serum from CD patients contains anti-TG2, TG3 and TG6 antibodies that may potentially cause ataxia.
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发表时间: 2009-01-01
期刊: INTERNAL MEDICINE
影响因子: 1.2
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