首页> 外文期刊>Journal of Neuroimmunology: Official Bulletin of the Research Committee on Neuroimmunology of the World Federation of Neurology >The expression of co-stimulatory and accessory molecules on cultured human muscle cells is not dependent on stimulus by pro-inflammatory cytokines: relevance for the pathogenesis of inflammatory myopathy.
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The expression of co-stimulatory and accessory molecules on cultured human muscle cells is not dependent on stimulus by pro-inflammatory cytokines: relevance for the pathogenesis of inflammatory myopathy.

机译:共刺激分子和辅助分子在培养的人肌肉细胞上的表达不依赖于促炎性细胞因子的刺激:与炎性肌病的发病机理有关。

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摘要

Specific activation of naive T cells requires TCR engagement plus interaction of CD28 on T cells with co-stimulatory B7-1/B7-2 on APCs. Since muscle cells may be directly involved in activating muscle-infiltrating T lymphocytes in polymyositis and inclusion body myositis, we analyzed B7 expression on myoblasts before and after treatment with pro-inflammatory cytokines. We found no expression of B7-1/B7-2, either constitutively or after stimulus with cytokines. Furthermore, myoblasts failed to stimulate alloreactive peripheral blood lymphocytes in mixed lymphocyte reactions. Lack of B7 expression was confirmed by immunostaining of polymyositis patients' muscle: only T and the few B lymphocytes present in inflammation areas expressed B7-1.
机译:幼稚T细胞的特异性激活需要TCR参与,以及T细胞上的CD28与APC上的共刺激B7-1 / B7-2相互作用。由于在多发性肌炎和包涵体性肌炎中,肌肉细胞可能直接参与激活肌肉浸润性T淋巴细胞,因此我们分析了促炎细胞因子治疗前后成肌细胞上B7的表达。我们没有发现B7-1 / B7-2的表达,无论是组成型还是细胞因子刺激后。此外,成肌细胞未能刺激混合淋巴细胞反应中的同种异体外周血淋巴细胞。多发性肌炎患者肌肉的免疫染色证实了B7表达的缺乏:炎症区域中仅T和少量B淋巴细胞表达B7-1。

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