Antibody fucosylation predicts disease severity in secondary dengue infection.

Antibody fucosylation predicts disease severity in secondary dengue infection.
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DOI:
10.1126/science.abc7303
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发表时间:
2021-06-04
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Ravetch JV
Ravetch JV
中科院分区:
其他
文献类型:
--
作者:
Bournazos S;Vo HTM;Duong V;Auerswald H;Ly S;Sakuntabhai A;Dussart P;Cantaert T;Ravetch JV

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虽然抗病毒抗体通常具有保护功能,但抗登革热病毒(DENV)的抗体却与疾病易感性增加有关。抗体可通过Fcγ受体介导登革热病毒对白细胞的感染,这可能是登革热疾病发病机制的原因之一。为了确定这种机制是否能解释疾病严重程度的差异,我们检测了感染前后以及具有不同疾病结果的患者的抗登革热病毒抗体的Fab和Fc结构。在登革热病毒感染人群中,抗体滴度和中和活性都与疾病严重程度无关。相反,登革热病毒感染导致IgG1岩藻糖基化特异性增加,而且岩藻糖基化IgG1的水平可预测登革热疾病的严重程度。因此,IgG1岩藻糖基化状态是登革热疾病的一种可靠的预后工具,突显了Fc聚糖结构在登革热发病机制中的关键作用。 二次感染期间的抗体Fc聚糖结构决定了对重症登革热疾病的易感性。
While anti-viral antibodies generally confer protective functions, antibodies against dengue virus (DENV) are associated with enhanced disease susceptibility. Antibodies can mediate DENV infection of leukocytes via Fcγ receptors, likely contributing to dengue disease pathogenesis. To determine if this mechanism accounts for variable disease severity, we examined Fab and Fc structures of anti-DENV antibodies from patients pre- and post-infection and with variable disease outcomes. Neither antibody titers nor neutralizing activity correlated with disease severity in DENV-infected populations. Rather, DENV infection induced a specific increase in IgG1 afucosylation and the levels of afucosylated IgG1 were predictive of dengue disease severity. Thus, the IgG1 fucosylation status represents a robust prognostic tool for dengue disease, highlighting the key role of the Fc glycan structure in dengue pathogenesis. The antibody Fc glycan structure during secondary infection determines susceptibility to severe dengue disease.
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