Blood:HSP110通过稳定MyD88维持ABL-DLBCL的NF-κB信号

2018-06-06 MedSci MedSci原创

中心点:HSP110通过稳定MyD88维持ABL-DLBCL的NF-κB信号。HSP110在ABL-DLBCL患者的淋巴结细胞中高表达,与MyD88的表达水平相关。摘要:激活的B细胞弥漫性大B细胞淋巴瘤(ABL-DLBCL)是一种侵袭性的淋巴增殖性疾病,涉及慢性NF-κB激活。BCR和MyD88信号通路组分的几个突变,如MyD88 L265P,均与上述异常激活相关。其中,热休克蛋白——HSP110

中心点:

HSP110通过稳定MyD88维持ABL-DLBCL的NF-κB信号。

HSP110在ABL-DLBCL患者的淋巴结细胞中高表达,与MyD88的表达水平相关。

摘要:

激活的B细胞弥漫性大B细胞淋巴瘤(ABL-DLBCL)是一种侵袭性的淋巴增殖性疾病,涉及慢性NF-κB激活。BCR和MyD88信号通路组分的几个突变,如MyD88 L265P,均与上述异常激活相关。其中,热休克蛋白——HSP110,已被证实在多种癌症中发挥促存活和(或)增殖因子的作用,但其在ABC-DLBCL的存活机制中的作用尚不明确。

Christophe Boudesco等研究人员发现用shRNA介导沉默HSP110可减少多个ABC-DLBCL细胞系的存活、降低IgM-MyD88共定位信号和NF-κB信号。与之相反,在ABC-DLBCL或非DLBCL细胞系中过表达HSP110可增强NF-κB信号,提示HSP110与NF-κB信号通路之间存在密切的互作。

通过免疫沉淀,研究人员还发现HSP110与野生型MyD88和MyD88 L265P突变型均有相互作用。HSP110对MyD88的两种类型均具有稳定作用,而且对MyD88 L265P的稳定作用更强,从而导致慢性NF-κB激活。

最后,HSP110在ABC-DLBCL患者活检淋巴结中的表达水平高于正常反应淋巴结的,而且研究人员发现,HSP110与MyD88之间存在强相关性。

总而言之,本研究表明在ABC-DLBCL中,HSP110通过稳定MyD88调控NF-κB信号,提示HSP110可作为ABC-DLBCL的新的治疗靶点。

原始出处:

Christophe Boudesco,et al.HSP110 sustains chronic NF-κB signaling in activated B cell diffuse large B cell lymphoma through MyD88 stabilization. Blood  2018  :blood-2017-12-819706;  doi: https://doi.org/10.1182/blood-2017-12-819706

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    2018-06-08 cathymary
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    2018-06-06 changjiu

    学习一下谢谢

    0

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    2018-06-06 1e145228m78(暂无匿称)

    学习了.谢谢作者分享!

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    2018-06-06 wqkm

    ^_^^_^^_^

    0

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