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Mesenteric IL-10-producing CD5+ regulatory B cells suppress cow’s milk casein-induced allergic responses in mice

机译:产生肠系膜IL-10的CD5 + 调节性B细胞抑制牛奶中酪蛋白引起的小鼠过敏反应

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Food allergy is a hypersensitive immune reaction to food proteins. We have previously demonstrated the presence of IL-10-producing CD5+ B cells and suggested their potential role in regulating cow’s milk casein allergy in humans and IgE-mediated anaphylaxis in mice. In this study, we determined whether IL-10-producing CD5+ regulatory B cells control casein-induced food allergic responses in mice and, if so, the underlying mechanisms. The induction of oral tolerance (OT) by casein suppressed casein-induced allergic responses including the decrease of body temperature, symptom score, diarrhea, recruitment of mast cells and eosinophils into jejunum, and other biological parameters in mice. Notably, the population of IL-10-producing CD5+ B cells was increased in mesenteric lymph node (MLN), but not in spleen or peritoneal cavity (PeC) in OT mice. The adoptive transfer of CD5+ B cells from MLN, but not those from spleen and PeC, suppressed the casein-induced allergic responses in an allergen-specific and IL-10-dependent manner. The inhibitory effect of IL-10-producing CD5+ B cells on casein-induced allergic response was dependent on Foxp3+ regulatory T cells. Taken together, mesenteric IL-10-producing regulatory B cells control food allergy via Foxp3+ regulatory T cells and could potentially act as a therapeutic regulator for food allergy.
机译:食物过敏是对食物蛋白质的超敏免疫反应。我们先前已经证明了产生IL-10的CD5 + B细胞的存在,并暗示了它们在调节人乳酪蛋白过敏症和IgE介导的小鼠过敏反应中的潜在作用。在这项研究中,我们确定了产生IL-10的CD5 + 调节性B细胞是否能控制酪蛋白诱导的小鼠食物过敏反应,如果是这样,还可能是其潜在机制。酪蛋白诱导的口服耐受性(OT)抑制了酪蛋白诱导的过敏反应,包括体温降低,症状评分,腹泻,肥大细胞和嗜酸性粒细胞募集进入空肠以及小鼠中的其他生物学参数。值得注意的是,OT小鼠中,产生IL-10的CD5 + B细胞的数量在肠系膜淋巴结(MLN)中增加,但在脾脏或腹膜腔(PeC)中却没有增加。来自MLN的CD5 + B细胞(而非脾脏和PeC的CD5 + B细胞)的过继转移以过敏原特异性和IL-10依赖性方式抑制了酪蛋白诱导的过敏反应。产生IL-10的CD5 + B细胞对酪蛋白过敏反应的抑制作用取决于Foxp3 + 调节性T细胞。总之,产生肠系膜IL-10的调节性B细胞通过Foxp3 + 调节性T细胞控制食物过敏,并有可能作为食物过敏的治疗调节剂。

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