Hepatitis B virus persistence in mice reveals IL-21 and IL-33 as regulators of viral clearance.

Hepatitis B virus persistence in mice reveals IL-21 and IL-33 as regulators of viral clearance.
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乙型肝炎病毒在小鼠体内的持续存在揭示了 IL-21 和 IL-33 作为病毒清除的调节因子

DOI:
10.1038/s41467-017-02304-7
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发表时间:
2017-12-14
影响因子:
16.6
通讯作者:
Liu J
Liu J
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Shen Z;Yang H;Yang S;Wang W;Cui X;Zhou X;Liu W;Pan S;Liu Y;Zhang J;Zhang J;Xie Y;Liu J

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B型肝炎病毒(HBV)通常在免疫功能正常的成人中引起自限性感染,但在一些成人和大多数母体感染的婴儿中建立慢性感染。决定清除率与持久性的因素尚未完全了解。HBV复制子质粒经尾静脉的流体动力学注射(HDI)通常导致免疫活性成年小鼠中的快速清除。在这里,我们报告了HBV在小鼠中的株特异性持久性的鉴定:一种基因型B株,命名为BPS,在~50%的HDI小鼠中持续长达33周。BPS的持久性需要病毒复制和多种病毒特征。与快速清除的菌株相比,BPS未能诱导稳健的暴露后血清IL-21/IL-33应答。注射表达IL-21或表达IL-33的质粒有助于清除预先建立的BPS持续性,并保护治愈的小鼠免受BPS再攻击。IL-21和IL-33还诱导另一种小鼠模型中预先建立的HBV持续性的清除。这些数据表明IL-21和IL-33是HBV清除的有效调节剂和有效的候选药物。B型肝炎病毒(HBV)仅在部分患者中建立慢性感染,但这些患者中清除失败的潜在机制尚未完全了解。在这里,作者鉴定和表征了一种可以在小鼠中持续存在的HBV毒株,并表明IL-21和IL-33应答有助于清除。
Hepatitis B virus (HBV) generally causes self-limiting infection in immunocompetent adults, but establishes chronic infection in some adults and in most maternally infected infants. Factors determining clearance versus persistence are not fully understood. Hydrodynamic injection (HDI) of HBV replicon plasmid via tail vein generally results in quick clearance in immunocompetent adult mice. Here, we report the identification of strain-specific persistence of HBV in mice: one genotype B strain, designated BPS, persisted up to 33 weeks in ~50% of HDI mice. BPS persistence requires viral replication and multiple viral features. Compared to quickly cleared strains, BPS fails to induce robust post-exposure serum IL-21/IL-33 responses. Injection of IL-21-expressing or IL-33-expressing plasmids facilitates clearance of pre-established BPS persistence and protects cured mice from BPS re-challenge. IL-21 and IL-33 also induce clearance of pre-established HBV persistence in another mouse model. These data reveal IL-21 and IL-33 as potent regulators of HBV clearance and valid drug candidates. Hepatitis B virus (HBV) establishes chronic infection in only some patients, but the mechanisms underlying clearance failure in these patients are not fully understood. Here, the authors identify and characterize an HBV strain that can persist in mice and show that IL-21 and IL-33 responses contribute to clearance.
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