A novel IgM-H-ficolin complement pathway to attack allogenic cancer cells in vitro.
A novel IgM-H-ficolin complement pathway to attack allogenic cancer cells in vitro.
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DOI:
10.1038/srep07824
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发表时间:
2015-01-16
影响因子:
4.6
通讯作者:
Yang J
中科院分区:
文献类型:
--
作者:
Lei X;Liu C;Azadzoi K;Li C;Lu F;Xiang A;Sun J;Guo Y;Zhao Q;Yan Z;Yang J
The pentameric serum IgMs are critical to immune defense and surveillance through cytotoxicity against microbes and nascent cancer cells. Ficolins, a group of oligomeric lectins with an overall structure similar to C1q and mannose-binding lectin (MBL) participate in microbe infection and apoptotic cell clearance by activating the complement lectin pathway or a primitive opsonophagocytosis. It remains unknown whether serum IgMs interplay with ficolins in cancer immunosurveillance. Here we report a natural cancer killing of different types of cancer cells by sera from a healthy human population mediated by a novel IgM–H-ficolin complement activation pathway. We demonstrate for the first time that H-ficolin bound to a subset of IgMs in positive human sera and IgM–H-ficolin deposited on cancer cells to activate complement attack in cancer cells. Our data suggest that the IgM–H-ficolin -mediated complement activation pathway may be another defensive strategy for human cancer immunosurveillance.
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