通过代去优化工程的活减弱的口疫病毒疫苗诱导了牛的强有力的保护性免疫反应
Sarah E Attreed1, Christina Silva1,2, Monica Rodriguez-Calzada1,3
1Plum Island Animal Disease Center, U.S. Department of Agriculture, Agricultural Research Service, Greenport, NY, USA.
NPJ vaccines
|January 24, 2026
概括
针对口病 (FMD) 的新活体减弱病毒 (LAV) 疫苗是使用代码子去优化开发的. 这些新型的口疫苗是安全的,引起强烈的免疫反应,并保护牛免受口疾病病毒的挑战.
科学领域:
- 兽医病毒学 兽医病毒学
- 疫苗开发 疫苗开发
- 分子生物学分子生物学
背景情况:
- 口病 (FMD) 是一种高度传染性且具有经济意义的病毒性疾病,影响牲畜.
- 目前的失活口疫苗存在局限性,需要开发新的控制策略,例如活衰减病毒 (LAV) 疫苗.
- 以前的研究表明,病毒基因去优化可以导致衰减,这为LAV的产生提供了潜在的方法.
研究的目的:
- 开发和评估一种新型的活体减弱病毒 (LAV) 疫苗用于口病病毒 (FMDV) 使用代码子去优化.
- 评估FMDV A24Cruzeiro LAV候选物 (A24-P2/P3Deopt) 在牛中的安全性和有效性.
- 将区分感染者与接种疫苗的动物 (DIVA) 标记物纳入LAV疫苗中.
主要方法:
- 通过降低P2/P3编码区域的优化来构建一个FMDV A24Cruzeiro LAV,用DIVA标记器创建A24-P2/P3Deopt.
- 通过皮肤舌内注射,监测临床症状,病毒病和病毒分泌,对牛进行安全性评估.
- 通过牛的皮下主要增强疫苗接种方案进行有效性评估,随后对野生类型的FMDV A24进行挑战.
主要成果:
- 发现A24-P2/P3Deopt LAV在牛群中是安全的,没有观察到临床症状,病毒性病,或病毒分泌.
- 使用A24-P2 / P3Deopt的Prime-boost疫苗引发了强烈的中和抗体反应,并提供了对FMDV挑战的完整保护.
- 疫苗诱导的抗体对其他FMDV血清型A菌株和亚洲1血清型表现出交叉反应性.
结论:
- 子脱优化是一种成功的策略,用于生成安全,免疫性和有效的活体减弱的FMDV疫苗.
- A24-P2 / P3Deopt LAV是牛口病控制的有希望的候选者,提供强大的保护和DIVA功能.
- 这种方法促进了口热疫苗的研发,解决了对这种毁灭性动物疾病的改善策略的需求.
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