单纯疱疹病毒 1(HSV-1)0ΔNLS 活疫苗在缺乏中和抗体的情况下可预防 HSV-1 gB T 细胞受体特异性转基因小鼠的眼部 HSV-1 感染。
Herpes Simplex Virus 1 (HSV-1) 0ΔNLS Live-Attenuated Vaccine Protects against Ocular HSV-1 Infection in the Absence of Neutralizing Antibody in HSV-1 gB T Cell Receptor-Specific Transgenic Mice.
机构信息
Department of Ophthalmology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA.
Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA.
出版信息
J Virol. 2020 Nov 23;94(24). doi: 10.1128/JVI.01000-20.
The contribution of T cell and antibody responses following vaccination in resistance to herpes simplex virus 1 (HSV-1) infection continues to be rigorously investigated. In the present article, we explore the contribution of CD8 T cells specific for the major antigenic epitope for HSV-1 glycoprotein B (gB, gB) in C57BL/6 mice using a transgenic mouse (gBT-I.1) model vaccinated with HSV-1 0ΔNLS. gBT-I.1-vaccinated mice did not generate a robust neutralization antibody titer in comparison to the HSV-1 0ΔNLS-vaccinated wild-type C57BL/6 counterpart. Nevertheless, the vaccinated gBT-I.1 mice were resistant to ocular challenge with HSV-1 compared to vehicle-vaccinated animals based on survival and reduced corneal neovascularization but displayed similar levels of corneal opacity. Whereas there was no difference in the virus titer recovered from the cornea comparing vaccinated mice, HSV-1 0ΔNLS-vaccinated animals possessed significantly less infectious virus during acute infection in the trigeminal ganglia (TG) and brain stem compared to the control-vaccinated group. These results correlated with a significant increase in gB-elicited interferon-γ (IFN-γ), granzyme B, and CD107a and a reduction in lymphocyte activation gene 3 (LAG-3), programmed cell death 1 (PD-1), and T cell immunoglobulin and mucin domain-containing protein 3 (TIM-3) expressed by TG infiltrating gB-specific CD8 T cells from the HSV-1 0ΔNLS-vaccinated group. Antibody depletion of CD8 T cells in HSV-1 0ΔNLS-vaccinated mice rendered animals highly susceptible to virus-mediated mortality similar to control-vaccinated mice. Collectively, the HSV-1 0ΔNLS vaccine is effective against ocular HSV-1 challenge, reducing ocular neovascularization and suppressing peripheral nerve virus replication in the near absence of neutralizing antibody in this unique mouse model. The role of CD8 T cells in antiviral efficacy using a live-attenuated virus as the vaccine is complicated by the humoral immune response. In the case of the herpes simplex virus 1 (HSV-1) 0ΔNLS vaccine, the correlate of protection has been defined to be primarily antibody driven. The current study shows that in the near absence of anti-HSV-1 antibody, vaccinated mice are protected from subsequent challenge with wild-type HSV-1 as measured by survival. The efficacy is lost following depletion of CD8 T cells. Whereas increased survival and reduction in virus replication were observed in vaccinated mice challenged with HSV-1, cornea pathology was mixed with a reduction in neovascularization but no change in opacity. Collectively, the study suggests CD8 T cells significantly contribute to the host adaptive immune response to HSV-1 challenge following vaccination with an attenuated virus, but multiple factors are involved in cornea pathology in response to ocular virus challenge.
疫苗接种后 T 细胞和抗体反应在抵抗单纯疱疹病毒 1(HSV-1)感染中的作用仍在严格研究中。在本文中,我们使用转基因小鼠(gBT-I.1)模型探索了针对 HSV-1 糖蛋白 B(gB,gB)主要抗原表位的 CD8 T 细胞在 C57BL/6 小鼠中的作用,该模型用 HSV-1 0ΔNLS 进行了疫苗接种。与 HSV-1 0ΔNLS 疫苗接种的野生型 C57BL/6 对照相比,gBT-I.1 疫苗接种的小鼠并未产生强大的中和抗体滴度。然而,与载体疫苗接种的动物相比,接种 gBT-I.1 的小鼠在眼部 HSV-1 挑战中具有抗性,这表现在存活率和减少角膜新生血管化方面,但表现出相似的角膜混浊程度。尽管比较疫苗接种的小鼠时,从角膜中回收的病毒滴度没有差异,但 HSV-1 0ΔNLS 疫苗接种的动物在三叉神经节(TG)和脑干中的急性感染中具有明显较少的传染性病毒,与对照组疫苗接种组相比。这些结果与 TG 浸润的 gB 特异性 CD8 T 细胞中 gB 引发的干扰素-γ(IFN-γ)、颗粒酶 B 和 CD107a 的显著增加以及淋巴细胞激活基因 3(LAG-3)、程序性细胞死亡 1(PD-1)和 T 细胞免疫球蛋白和粘蛋白结构域蛋白 3(TIM-3)的表达减少相关,这些表达在 HSV-1 0ΔNLS 疫苗接种组中减少。在 HSV-1 0ΔNLS 疫苗接种的小鼠中耗尽 CD8 T 细胞,使动物对病毒介导的死亡率高度敏感,类似于对照组疫苗接种的小鼠。总的来说,HSV-1 0ΔNLS 疫苗可有效抵抗眼部 HSV-1 挑战,减少眼部新生血管化,并在这种独特的小鼠模型中抑制周围神经病毒复制,而中和抗体几乎不存在。使用活减毒病毒作为疫苗时,CD8 T 细胞在抗病毒功效中的作用因体液免疫反应而变得复杂。在单纯疱疹病毒 1(HSV-1)0ΔNLS 疫苗的情况下,已将保护相关物定义为主要是抗体驱动的。本研究表明,在几乎没有抗 HSV-1 抗体的情况下,疫苗接种的小鼠通过存活免受随后的野生型 HSV-1 挑战的保护。在耗尽 CD8 T 细胞后,功效丧失。尽管在接种 HSV-1 的小鼠中观察到存活率增加和病毒复制减少,但角膜病理学表现为新生血管化减少,但混浊度没有变化。总的来说,该研究表明,在接种减毒病毒后,CD8 T 细胞在宿主对 HSV-1 挑战的适应性免疫反应中显著发挥作用,但角膜对眼部病毒挑战的病理反应涉及多种因素。