Antibody responses to influenza A(H1N1)pdm infection.

Antibody responses to influenza A(H1N1)pdm infection.
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DOI:
10.1016/j.vaccine.2020.04.069
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发表时间:
2020-06-02
期刊:
影响因子:
5.5
通讯作者:
Gordon A
Gordon A
中科院分区:
医学3区
文献类型:
--
作者:
Wraith S;Nachbagauer R;Balmaseda A;Stadlbauer D;Ojeda S;Rajabhathor A;Lopez R;Guglia AF;Sanchez N;Amanat F;Gresh L;Kuan G;Krammer F;Gordon A

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我们调查了甲型H1N1pdm流感病毒感染的体液免疫反应,发现通过PCR鉴定的感染者中有32人(22%)未能产生≥4倍的血凝素抑制测定(HAI)反应;其中 18 人 (56%) 产生了替代抗体反应(针对全长 HA、HA 茎或神经氨酸酶)。这些人原有的 HAI 抗体滴度较低,且病情较轻。另外 14 名患者 (44%) 没有产生替代抗体反应,具有较高的针对全长和茎 HA 的预先存在的抗体滴度,并且病情较轻。这些发现表明,一些人对流感感染产生了替代抗体反应。为了设计更广泛的保护性流感疫苗,针对这些替代位点可能是有用的。这些发现表明,目前仅通过 HAI 检测就漏掉了一些流感病例,导致低估了全球流感感染的负担。
We investigated humoral immune response to influenza A(H1N1)pdm infection and found 32 (22%) of the infected individuals identified by PCR failed to produce a ≥4-fold hemagglutinin inhibition assay (HAI) response; a subset of 18 (56%) produced an alternate antibody response (against full-length HA, HA stalk, or neuraminidase). These individuals had lower pre-existing HAI antibody titers and showed a pattern of milder illness. An additional subset of 14 (44%) did not produce an alternate antibody response, had higher pre-existing antibody titers against full-length & stalk HA, and were less sick. These findings demonstrate that some individuals mount an alternate antibody response to influenza infection. In order to design more broadly protective influenza vaccines it may be useful to target these alternate sites. These findings support that there are influenza cases currently being missed by solely implementing HAI assays, resulting in an underestimation of the global burden of influenza infection.
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