Down-regulation of hepatitis delta virus super-infection in the woodchuck model.

Down-regulation of hepatitis delta virus super-infection in the woodchuck model.
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土拨鼠模型中丁型肝炎病毒重复感染的下调。

DOI:
10.1016/j.virol.2019.03.002
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发表时间:
2019
期刊:
影响因子:
3.7
通讯作者:
Gudima,SeverinO
Gudima,SeverinO
中科院分区:
医学3区
文献类型:
--
作者:
Lukash,Tetyana;Freitas,Natalia;Menne,Stephan;Gudima,SeverinO

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人们对丁型肝炎病毒(HDV)清除的机制知之甚少。本研究详细分析了土拨鼠模型中 HDV 感染的深度下调。慢性感染 HBV 相关土拨鼠肝炎病毒的土拨鼠的 HDV 重复感染产生了两种模式。首先,HDV 病毒血症出现一个尖锐的峰值,随后大幅下降,HDV 病毒粒子的感染性最初上升,随后感染性突然丧失。在第二个阶段,HDV 滴度上升,随后表现出 HDV 水平较高的平台状特征;当HDV滴度达到稳定水平时,HDV感染性持续升高。感染性丧失并非由于病毒体包膜缺陷、与抗包膜抗体结合或丁型肝炎病毒基因组突变所致,而是与病毒体相关丁型肝炎病毒基因组复制能力的大幅降低有关。随后发现,在感染性降低的病毒体中,大多数 HDV RNA 不是全长基因组,这表明 HDV 可能通过 RNA 片段化被清除。
Mechanisms mediating clearance of hepatitis delta virus (HDV) are poorly understood. This study analyzed in detail profound down-regulation of HDV infection in the woodchuck model. Super-infection with HDV of woodchucks chronically infected with HBV-related woodchuck hepatitis virus produced two patterns. In the first, HDV viremia had a sharp peak followed by a considerable decline, and initial rise of HDV virions' infectivity followed by abrupt infectivity loss. In the second, HDV titer rose and later displayed plateau-like profile with high HDV levels; and HDV infectivity became persistently high when HDV titer reached the plateau. The infectivity loss was not due to defects in the virions' envelope, binding to anti-envelope antibodies, or mutations in HDV genome, but it correlated with profound reduction of the replication capacity of virion-associated HDV genomes. Subsequent finding that in virions with reduced infectivity most HDV RNAs were not full-length genomes suggests possible HDV clearance via RNA fragmentation.
迈耶里安心理生物学、人格发展和生活经历的作用。
DOI: --
发表时间: 1986
影响因子: 17.7
作者:
M. Rutter
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期刊: Social science & medicine. Medical psychology & medical sociology
影响因子: --
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发表时间: 1986
影响因子: 5.9
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