Lymphatic Cell Therapy Laboratory, Clinic of Hematology, Hannover Medical School, Hannover, Germany.
Vaccine. 2010 Jan 22;28(4):922-33. doi: 10.1016/j.vaccine.2009.10.150. Epub 2009 Nov 18.
Halting the spread of hepatitis C virus (HCV) and also eradicating HCV in subjects with chronic infection are major goals for global health. To this end, several years of research on HCV vaccine development have led to the conclusion that multi-antigenic and multi-functional vaccine types are necessary for effectiveness against HCV infection. In this study, we evaluated lentiviral vectors (LV) expressing clusters of HCV structural (LV-HCV-S) and non-structural (LV-HCV-NS) genes for future vaccine development. Batches of high titer LV were used to transduce differentiated dendritic cells (DC) and monocytes. We report successful delivery of HCV gene clusters, particularly into monocytes, leading to >80% LV-HCV-NS and >70% LV-HCV-S and transduced cells, respectively. Intracellular expression of HCV proteins in monocyte-derived DC resulted in immunophenotypic changes, such as downregulation of CD83 and CD86. Monocytes expressing NS proteins and differentiated into DC stimulated allogeneic and autologous CD8(+) and CD4(+) T cells in vitro and resulted in antigen-specific CD8(+) T cell responses against NS3, NS4a and NS5b. Hence, lentiviral-mediated expression of the multi-antigenic HCV-NS cluster in monocytes subsequently differentiated into DC is a novel potential anti-HCV vaccine modality.
阻止丙型肝炎病毒 (HCV) 的传播并在慢性感染的个体中根除 HCV 是全球健康的主要目标。为此,对 HCV 疫苗开发进行了多年的研究,得出的结论是,针对 HCV 感染的有效性需要多抗原和多功能的疫苗类型。在这项研究中,我们评估了表达 HCV 结构 (LV-HCV-S) 和非结构 (LV-HCV-NS) 基因簇的慢病毒载体 (LV),用于未来的疫苗开发。高滴度的 LV 批次用于转导分化的树突状细胞 (DC) 和单核细胞。我们报告了 HCV 基因簇的成功传递,特别是进入单核细胞,分别导致 >80%的 LV-HCV-NS 和 >70%的 LV-HCV-S 和转导细胞。单核细胞衍生的 DC 中 HCV 蛋白的细胞内表达导致免疫表型变化,例如 CD83 和 CD86 的下调。表达 NS 蛋白并分化为 DC 的单核细胞在体外刺激同种异体和自体 CD8(+)和 CD4(+)T 细胞,并针对 NS3、NS4a 和 NS5b 产生抗原特异性 CD8(+)T 细胞反应。因此,慢病毒介导的单核细胞中多抗原 HCV-NS 簇的表达随后分化为 DC 是一种新型潜在的抗 HCV 疫苗模式。