Breaking tolerance in hepatitis B surface antigen (HBsAg) transgenic mice by vaccination with cross‐reactive, natural HBsAg variants

Breaking tolerance in hepatitis B surface antigen (HBsAg) transgenic mice by vaccination with cross‐reactive, natural HBsAg variants
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通过接种交叉反应性天然 HBsAg 变体,打破乙型肝炎表面抗原 (HBsAg) 转基因小鼠的耐受性

DOI:
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发表时间:
2003
影响因子:
5.4
通讯作者:
J. Reimann
J. Reimann
中科院分区:
医学3区
文献类型:
--
作者:
R. Schirmbeck;N. Dikopoulos;M. Kwissa;F. Leithäuser;K. Lamberth;S. Buus;K. Melber;J. Reimann

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加工B型肝炎病毒(HBV)的外源性B型肝炎表面抗原(HBsAg)产生KB-结合S208-215表位1;加工内源性HBsAg产生KB-结合S190-197表位2。当用天然的Agadww或Agadw 2变体免疫小鼠时,交叉反应性CD 8 + T细胞应答针对表位1而非表位2引发,所述两种表位在一个或两个残基内不同。来自肝脏中的转基因的HBs-Agayw的表达使(HBs-tg)小鼠耐受HBs-Agayw的表位1。表位1特异性的CD 8 + T细胞可以在HBs-tg小鼠中通过Agadw 2引发;这些特异性的CD 8 + T细胞与从转基因编码的Agadw 2加工的表位1交叉反应。接种疫苗的HBs-Agayw转基因小鼠的肝脏显示出严重的组织病理学,并含有功能性(产生IFNγ)、交叉反应性CD 8 + T细胞,接种疫苗的HBs-tg小鼠显示出抗原血症减少。因此,接种来自不同HBV血清/基因型的天然HBsAg变体可引发交叉反应性、特异性CD 8 + T细胞免疫,从而破坏对HBsAg的耐受性。
Processing exogenous hepatitis B surface antigen (HBsAg) of the hepatitis B virus (HBV) generates the Kb‐binding S208–215 epitope 1; processing endogenous HBsAg generates theKb‐binding S190–197 epitope 2. Cross‐reactive CD8+ T cell responses were primed to epitope 1 but not epitope 2 when mice were immunized with natural HBsAgayw, orHBsAgadw2 variants differing within both epitopes by one or two residues. Expression of HBsAgayw from a transgene in the liver renders (HBs‐tg) mice tolerant to epitope 1 of HBsAgayw. CD8+ T cells specific for epitope 1 could be primed in HBs‐tg mice by HBsAgadw2; these specific CD8+ T cells cross‐reacted with epitope 1 processed from the transgene‐encoded HBsAgayw. The liver of vaccinated HBsAgayw transgenic mice showed severe histopathology and contained functional (IFNγ‐producing), cross‐reactive CD8+ T cells, and vaccinated HBs‐tg mice showed reduced antigenemia. Hence, vaccination with natural HBsAg variants from different HBV sero/genotypes can prime cross‐reactive, specific CD8+ T cellimmunity that breaks tolerance to HBsAg.
DOI: 10.4049/jimmunol.154.5.2504
发表时间: 1995-03
影响因子: 4.4
作者:
Susanne Wirth;L. Guidotti;K. Ando;H. Schlicht;F. Chisari
通讯作者: Susanne Wirth;L. Guidotti;K. Ando;H. Schlicht;F. Chisari
DOI: 10.1016/0168-9525(89)90057-7
发表时间: 1989
期刊: Trends in genetics : TIG
影响因子: --
作者:
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DOI: 10.1053/jhep.2002.37139
发表时间: 2002-12-01
期刊: HEPATOLOGY
影响因子: 13.5
作者:
Wai, CT;Chu, CJ;Lok, ASF
通讯作者: Lok, ASF