Nat Immuno:干扰素β/IFNAR1激活免疫机制

2013-07-23 koo bio360

日前,来自澳洲莫纳什大学的科学家们通过研究获得了关于免疫反应早期阶段的新见解,这为从多发性硬化症到癌症等许多疾病开发治疗提供了一些新的途径。这项刊登在《自然免疫学》(Nature Immunology)杂志上的研究首次确定了,β干扰素(interferon beta, IFNβ)蛋白结合细胞并激活免疫反应的机制特征。 当身体检测到病毒或细菌感染时,干扰素β就会产生。对于身体的抵御能力来说,干

日前,来自澳洲莫纳什大学的科学家们通过研究获得了关于免疫反应早期阶段的新见解,这为从多发性硬化症到癌症等许多疾病开发治疗提供了一些新的途径。这项刊登在《自然免疫学》(Nature Immunology)杂志上的研究首次确定了,β干扰素(interferon beta, IFNβ)蛋白结合细胞并激活免疫反应的机制特征。

当身体检测到病毒或细菌感染时,干扰素β就会产生。对于身体的抵御能力来说,干扰素蛋白是至关重要的,它们激活了免疫细胞,例如巨噬细胞,能够干扰病毒的复制,刺激细胞对感染的抵抗。另外,它们还能促进身体对癌症和其它压力的免疫反应。

我们知道,在免疫反应的不同阶段,至少有20种干扰素亚型在免疫反应的不同阶段生成。它们似乎具有不同的功能,目前对于这些功能及其它们的触发因子还不是很清楚。绘制INFβ-细胞互作图谱是该领域的一个突破。

研究人员表示,确定干扰素的功能对于开发以及改进治疗诸如红斑狼疮和多发性硬化症等无法治愈的疾病具有重要的意义。

研究人员指出,干扰素可用于治疗许多的疾病,然而这些疗法具有剂量限制副作用。此外,干扰素似乎驱动了一些自身免疫性疾病,提升了用干扰素阻断剂进行疾病治疗的前景。当研究人员越是深入地了解干扰素的功能,就越是能够制定出效应增高的治疗方法,或是促进或是阻断它们的作用。

这项研究在分子水平上确定了IFNβ与IFNAR1的相互作用,为理性设计药物提供了一些新的途径。

研究人员表示,发现当IFNβ与细胞结合时,会传送IFNAR1–IFN-β这一不同寻常的信号,其似乎与干扰素治疗的某些毒副作用,例如败血症有关。这为更具选择性的激活干扰素作用提供了一条有前景的途径。

Nicole A de Weerd, Julian P Vivian, Thao K Nguyen, Niamh E Mangan, Jodee A Gould, Susie-Jane Braniff, Leyla Zaker-Tabrizi, Ka Yee Fung, Samuel C Forster, Travis Beddoe, Hugh H Reid, Jamie Rossjohn, Paul J Hertzog. Structural basis of a unique interferon-β signaling axis mediated via the receptor IFNAR1. Nature Immunology, 21 July 2013; DOI:10.1038/ni.2667

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    2013-11-28 passed water
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    2014-05-27 liye789132251
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    2013-07-25 bugit
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