登革热的致病性:分子生物学面临的挑战
1Division of Health Sciences, Rockefeller Foundation, New York, NY 10036.
Science (New York, N.Y.)
|January 29, 1988
概括
登革热病毒血清型导致不同的疾病严重程度,从登革热到严重的登革热出血性发烧/登革热休克综合征. 感染的抗体依赖增强在调节登革热疾病进展方面发挥着关键作用.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 热带医学 热带医学
背景情况:
- 登革热病毒是由埃及甲虫蚊子传播的,存在四种不同的血清型.
- 登革热感染可以表现为良性登革热或严重的登革热出血热/登革热休克综合征 (DHF/DSS).
- 高血压/低血压在东南亚儿童中普遍存在,其特点是血管透性增加和血液静止问题.
研究的目的:
- 阐明导致登革热病严重程度的机制.
- 研究抗体依赖增强 (ADE) 在登革热病毒感染中的作用.
- 探索遗传因素和病毒表位对疾病结果的影响.
主要方法:
- 对登革热病毒血清型及其传播的分析.
- 观察不同年龄组和地理位置的DHF/DSS病例.
- 在体外研究中使用单核细胞血统细胞和登革热抗体.
- 检查单克隆抗体的抗原表位分布.
主要成果:
- DHF/DSS发生在登革热免疫母亲的婴儿和患有二次异型登革热感染的儿童中.
- 亚中和性登革热抗体增强单核细胞中的病毒感染,这一过程称为抗体依赖增强 (ADE).
- 感染的ADE是人类登革热病严重程度的关键调节者.
- 遗传因素可能会影响单细胞中的病毒复制,进一步控制疾病的严重程度.
- 登革热病毒上的抗原表位因部分中和或增强感染而调节疾病.
结论:
- 登革热病毒感染的抗体依赖增强是确定疾病严重程度的关键因素.
- 在单细胞中对病毒复制的遗传控制也可能在疾病调节中发挥作用.
- 了解登革热病毒基因组结构对于推进对其病变的了解至关重要.
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