CD8+ T cell responses to lytic EBV infection: late antigen specificities as subdominant components of the total response.

CD8+ T cell responses to lytic EBV infection: late antigen specificities as subdominant components of the total response.
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DOI:
10.4049/jimmunol.1301629
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发表时间:
2013-12-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Rickinson AB
Rickinson AB
中科院分区:
其他
文献类型:
--
作者:
Abbott RJ;Quinn LL;Leese AM;Scholes HM;Pachnio A;Rickinson AB

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Epstein-Barr 病毒 (EBV) 引发初级 CD8+ T 细胞反应,通过从传染性单核细胞增多症 (IM) 患者克隆 T 细胞,该反应似乎偏向于立即早期 (IE) 和一些早期 (E) 裂解周期蛋白,而晚期 (L) 蛋白很少被靶向。然而,在长期病毒携带者的多克隆 T 细胞培养物中经常检测到 L 抗原特异性反应。为了解决对原发性感染和持续性感染的反应之间的这种明显差异,使用涵盖 2 种 IE、6 种代表性 E 和 7 种代表性 L 蛋白的肽,在离体 IFN-γ ELISPOT 测定中筛选了 13 名长期携带者。这揭示了记忆 CD8 对 44 个新的裂解周期表位的反应,这些表位横跨所有三种蛋白质类别,但在频率和大小方面,保持 IE > E > L 免疫优势层次。使用记忆 CD8+ T 细胞克隆确定了 10 个(包括 7L)新表位的 HLA 限制后,我们在 HLA 匹配的 IM 患者中进行了研究,发现了此类反应性,但通常水平较低,这解释了为什么它们在最初的 IM 克隆筛选中未被检测到。无论在何处进行测试,所有针对这些新的裂解周期表位的 CD8+ T 细胞克隆都能识别自然表达其靶抗原的裂解感染细胞。然而,令人惊讶的是,针对最常识别的 L 抗原(BNRF1 被膜蛋白)的克隆也能识别潜伏感染的生长转化细胞。我们推断 BNRF1 也是一种潜在抗原,可以作为 EBV 驱动的 B 淋巴细胞增殖性疾病的 T 细胞治疗的靶标。
Epstein-Barr virus (EBV) elicits primary CD8+ T cell responses that, by T cell cloning from infectious mononucleosis (IM) patients, appear skewed towards immediate early (IE) and some early (E) lytic cycle proteins, with late (L) proteins rarely targeted. However, L antigen-specific responses have been regularly detected in polyclonal T cell cultures from long-term virus carriers. To resolve this apparent difference between responses to primary and persistent infection, 13 long-term carriers were screened in ex vivo IFN-γ ELISPOT assays using peptides spanning the 2 IE, 6 representative E and 7 representative L proteins. This revealed memory CD8 responses to 44 new lytic cycle epitopes that straddle all three protein classes but, in terms of both frequency and size, maintain the IE > E > L hierarchy of immunodominance. Having identified the HLA restriction of 10 (including 7L) new epitopes using memory CD8+ T cell clones, we looked in HLA-matched IM patients and found such reactivities but typically at low levels, explaining why they had gone undetected in the original IM clonal screens. Wherever tested, all CD8+ T cell clones against these novel lytic cycle epitopes recognised lytically-infected cells naturally expressing their target antigen. Surprisingly, however, clones against the most frequently recognised L antigen, the BNRF1 tegument protein, also recognised latently-infected, growth-transformed cells. We infer that BNRF1 is also a latent antigen that could be targeted in T cell therapy of EBV-driven B-lymphoproliferative disease.
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发表时间: 2001-09-01
影响因子: 2.2
作者:
Maecker, HT;Dunn, HS;Picker, LJ
通讯作者: Picker, LJ
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DOI: 10.1084/jem.20070256
发表时间: 2007-08-06
期刊: The Journal of experimental medicine
影响因子: --
作者:
Hislop AD;Ressing ME;van Leeuwen D;Pudney VA;Horst D;Koppers-Lalic D;Croft NP;Neefjes JJ;Rickinson AB;Wiertz EJ
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发表时间: 1998-11-01
影响因子: 5.4
作者:
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