抗PfGARP激活了寄生虫的编程细胞死亡并减少了严重的疟疾
Dipak K Raj1,2, Alok Das Mohapatra1,2, Anup Jnawali1,2
1Center for International Health Research, Rhode Island Hospital, Brown University Medical School, Providence, RI, USA.
Nature
|May 20, 2020
概括
一种新型疟疾疫苗候选物,叫做Plasmodium falciparum富含谷氨酸蛋白 (PfGARP),显示出有前途. 针对PfGARP的抗体可以防止严重的疟疾并降低寄生虫密度,为疟疾控制提供了新的途径.
科学领域:
- 免疫学
- 寄生虫学
- 疫苗学
背景情况:
- 疟疾是导致儿童死亡的主要原因,目前还没有完全有效的疫苗.
- 识别免疫个体识别的新型寄生虫抗原对于疫苗开发至关重要.
研究的目的:
- 通过抗体识别疟疾耐药儿童中的Plasmodium falciparum抗体.
- 评估PfGARP作为疟疾疫苗候选者的潜力.
主要方法:
- 对寄生虫Plasmodium falciparum蛋白质体进行差异查.
- 从耐疟疾和易感儿童的血中分析抗体.
- 在体外杀死感染红细胞的测试.
- 非人类灵长类动物的疫苗接种和挑战研究.
- 坦桑尼亚和肯尼亚人口的纵向队列研究.
主要成果:
- 在抗疟疾儿童中,Plasmodium falciparum富含谷氨酸蛋白 (PfGARP) 被确定为抗体的标.
- 对PfGARP的抗体诱导了受托福菌感染的红细胞的编程细胞死亡.
- 用PfGARP接种在非人类灵长类动物中提供了部分保护.
- 缺乏抗PfGARP抗体的个体患有严重疟疾和寄生虫密度增加的风险较高.
结论:
- PfGARP是一种有前途的疟疾疫苗候选抗原.
- 对PfGARP的抗体通过杀死感染的红细胞提供保护.
- 基于pfGARP的疫苗可以与其他疟疾控制策略协同工作.
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