Baculovirus Display of Varicella-Zoster Virus Glycoprotein E Induces Robust Humoral and Cellular Immune Responses in Mice.

Baculovirus Display of Varicella-Zoster Virus Glycoprotein E Induces Robust Humoral and Cellular Immune Responses in Mice.
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水痘-带状疱疹病毒糖蛋白 E 的杆状病毒展示可诱导小鼠产生强烈的体液和细胞免疫反应

DOI:
10.3390/v14081785
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发表时间:
2022-08-16
期刊:
Viruses
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--
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其他
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水痘-带状疱疹病毒(VZV)是水痘和带状疱疹的病原体,在全球范围内对人类健康构成重大挑战。最初的VZV感染--更常见于儿童--会导致自限性水痘。然而,在以后的生活中,潜伏的VZV可能在这些患者中重新激活,导致HZ和带状疱疹后神经痛(PHN),这是一种严重而痛苦的并发症。VZV糖蛋白E(GE)已被开发成针对HZ(Shingrix)的特许亚单位疫苗。然而,它的疗效依赖于伴随的强效佐剂(AS01B)的输送。在这里,我们试图通过在杆状病毒表面展示VZV-GE(Bac-GE)来创造一种新的疫苗设计免疫原。通过流式细胞仪和免疫电子显微镜验证了GE在工程杆状病毒上的正确定位和展示。我们发现Bac-GE具有良好的抗原性,与其他疫苗策略相比,它不仅能诱导更强的GE特异性的CD4+和CD8+T细胞反应,而且还能诱导更高水平的VZV特异性中和抗体。总之,我们表明VZV-GE的杆状病毒展示能够提供HZ疫苗开发所需的理想体液和细胞免疫反应,为基于杆状病毒的疫苗设计铺平道路。
Varicella–zoster virus (VZV) is the causative agent of varicella and herpes zoster (HZ) and can pose a significant challenge to human health globally. The initial VZV infection—more common in children—causes a self-limiting chicken pox. However, in later life, the latent VZV can become reactivated in these patients, causing HZ and postherpetic neuralgia (PHN), a serious and painful complication. VZV glycoprotein E (gE) has been developed into a licensed subunit vaccine against HZ (Shingrix). However, its efficacy relies on the concomitant delivery of a robust adjuvant (AS01B). Here, we sought to create a new immunogen for vaccine design by displaying the VZV–gE on the baculovirus surface (Bac–gE). Correct localization and display of gE on the engineered baculovirus was verified by flow cytometry and immune electron microscopy. We show that Bac–gE provides excellent antigenicity against VZV and induces not only stronger gE-specific CD4+ and CD8+ T cell responses but also higher levels of VZV–specific neutralizing antibodies as compared with other vaccine strategies in mice. Collectively, we show that the baculovirus display of VZV–gE confers ideal humoral and cellular immune responses required for HZ vaccine development, paving the way for a baculovirus-based vaccine design.
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