CD4-blockade can induce protection from peanut-induced anaphylaxis.

CD4-blockade can induce protection from peanut-induced anaphylaxis.
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DOI:
10.3389/fimmu.2011.00056
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发表时间:
2011
影响因子:
7.3
通讯作者:
Graca L
Graca L
中科院分区:
医学2区
文献类型:
--
作者:
Duarte J;Caridade M;Graca L

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单克隆抗体(mAb)已被证明在一系列自身免疫、变态反应和移植的动物模型中有效诱导免疫耐受。我们研究了是否CD4阻断,有效诱导移植耐受,可以防止导致过敏反应的全身免疫反应。我们发现,用非消耗性抗CD4单克隆抗体治疗可以预防花生诱导的过敏反应,随后全身暴露于粗花生提取物(CPE)。此外,CD4阻断的效果不干扰总体免疫能力,因为抗CD4处理的小鼠仍然完全有能力对不相关的抗原作出反应。过敏反应的保护与Foxp3+调节性T细胞(Treg)的频率增加相关,并在Treg耗竭后被废除。综上所述,我们的数据表明,在CD4阻断存在下,CPE激活T细胞导致Treg扩增,可以预防花生诱导的过敏反应。
Monoclonal antibodies (mAb) have been shown effective in inducing immune tolerance in a range of animal models of autoimmunity, allergy, and transplantation. We investigated whether CD4-blockade, effective in inducing transplantation tolerance, could prevent systemic immune responses leading to anaphylaxis. We found that treatment with a non-depleting anti-CD4 mAb could prevent peanut-induced anaphylaxis following subsequent systemic exposure to crude peanut extract (CPE). Furthermore, the effect of CD4-blockade did not interfere with overall immune competence, as anti-CD4 treated mice remained fully competent to respond to unrelated antigens. Protection from anaphylaxis correlated with increased frequency of Foxp3+ regulatory T cells (Treg), and was abrogated following Treg depletion. Taken together our data suggest that activation of T cells by CPE in presence of CD4-blockade leads to Treg expansion that can prevent peanut-induced anaphylaxis.
DOI: 10.1371/journal.pone.0010558
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