基于基托桑纳米粒子的 ΔgE IBRV 疫苗:一种新的 DIVA 兼容策略,用于提高几内亚猪的免疫力
Neeraj K Pawaskar1, Akhilesh Kumar2, Mohini Saini3
1Division of Veterinary Biotechnology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly 243122 Uttar Pradesh, India.
International journal of pharmaceutics
|February 1, 2026
概括
素纳米颗粒 (CNPs) 显示出作为无活化牛感染性鼻炎 (IBR) 疫苗的优质辅助剂的希望. 这项研究表明,CNP增强了免疫反应,并提供了区分感染者与接种疫苗的动物 (DIVA) 能力,克服了传统辅助剂的局限性.
科学领域:
- 兽医免疫学 兽医免疫学
- 纳米技术在疫苗开发中的作用
- 牛的传染病 牛的传染病
背景情况:
- 感染性牛鼻炎 (IBR) 在牛群中造成重大经济损失.
- 不活化的IBR疫苗需要辅助剂来增强免疫性.
- 传统的辅助剂有其局限性,包括Th2偏差和反应性.
研究的目的:
- 评估基托桑纳米颗粒 (CNPs) 作为非活化糖蛋白E删除 (ΔgE) IBR病毒的传递系统.
- 评估CNP能够提供持续的抗原释放和强大的免疫激活的能力.
- 确定基于CNP的疫苗的区分感染者与接种疫苗的动物 (DIVA) 能力.
主要方法:
- 通过使用离子凝与特定的奇托:三聚酸比率来制备CNP.
- 对CNP的表征包括大小,泽塔潜力,多分散性指数 (PDI) 和封装效率.
- 不活化的 ΔgE IBR 病毒被封装在 CNPs 中,并分析了释放动力学.
- 通过肌肉内和鼻内疫苗接种,测量病毒中和标位,细胞因子表达 (IL-2,IL-4,IL-10,IFN-γ),PBMC增殖和特异性抗体反应 (gB,gE) 来评估几内亚猪的免疫性.
主要成果:
- CNP表现出最佳特征:410纳米大小,+15mV泽塔电位,PDI<0.5和>95%的封装效率.
- 双相释放动力学显示初始爆发之后持续的抗原释放.
- 用CNP-ΔgEIBRV肌肉内接种疫苗诱导高病毒中和标位 (1:256到第60天) 和平衡的Th1/Th2细胞因子概况.
- 通过gB抗体阳性和gE抗体不存在来证实DIVA的兼容性.
- 实现了活 ΔgE IBR 病毒的封装,证明了平台的多功能性.
结论:
- 基托桑纳米颗粒作为一个有效的辅助剂和输送系统,用于无活化IBR疫苗.
- 基于CNP的疫苗克服了传统辅助剂的局限性,提供持续释放和强大的免疫反应.
- 开发的CNP平台支持DIVA策略,适用于活体和非活化的病毒抗原.
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