J Rheumatol:滑膜细胞来源的白细胞介素35增强骨关节炎和类风湿性关节炎的B细胞反应

2017-12-26 xiangting MedSci原创

这是首次证实滑膜/外周B细胞表达IL-35R并对IL-35刺激有反应。

白介素35(IL-35)的表达升高与自身免疫性疾病,包括类风湿性关节炎(RA)有关。这项研究旨在确定RA和骨关节炎(OA)患者滑膜中IL-35、B细胞和基质细胞之间的功能相互作用。

采用实时定量PCR(qRT-PCR)和免疫组织化学方法,检测RA和OA滑膜中IL-35(EBI-3 / p35)的表达。通过流式细胞仪测定RA、OA患者和健康供体对照(HC)的滑膜和外周解离的B细胞上的IL-35受体(IL-35R)表达。通过流式细胞仪和qRT-PCR测定IL-4和/或IL-35刺激后B细胞活化的程度。在存在/不存在肿瘤坏死因子-α(TNF-α)和有/无抗IL-35阻断抗体的情况下,将从RA和OA滑膜纯化的滑膜成纤维细胞(SF)与外周HC B细胞进行共培养。

EBI-3 / p35转录物在靠近RA和OA滑膜中的B细胞表达。在从RA/OA患者的滑膜和外周提取的B细胞中表达IL-35R亚基、gp130和IL-27Rα,而不是IL-12Rβ2。值得注意的是,RA滑膜在其细胞表面表达最高水平的IL-27Rα。IL-35在HC B细胞中诱导增殖和IgG产生。将RASF与HC B细胞共培养,而不是OASF,B细胞活化显著升高。B细胞中TNF-α诱导的,RASF依赖性的IgG分泌部分是IL-35依赖性的。

这是首次证实滑膜/外周B细胞表达IL-35R并对IL-35刺激有反应。RA滑膜中的SF可通过IL-35与RA滑膜中的B细胞活化和维持有关。

原始出处:

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    2018-08-24 lisa438
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    2017-12-28 lmm397
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