Blood:PfGARP有望成为疟疾治疗的新靶点

2019-01-06 MedSci MedSci原创

中心点:恶性疟原虫GARP(PfGARP)是一种分泌蛋白,能与人红细胞上的带3蛋白(人红细胞上最主要的蛋白)结合。在体外,PfGARP可诱导RBC聚集,或可作为疾病进展的生物标志物。摘要:疟疾仍是人类健康和经济发展的重大的全球性的威胁。恶性疟疾感染的红细胞所引发的微血管损伤是病程严重的标志,导致高死亡率,特别是在撒哈拉以南非洲的儿童中。在本研究中,Haifa Almukadi等人采用噬菌体进行cD

中心点:

恶性疟原虫GARP(PfGARP)是一种分泌蛋白,能与人红细胞上的带3蛋白(人红细胞上最主要的蛋白)结合。

在体外,PfGARP可诱导RBC聚集,或可作为疾病进展的生物标志物。

摘要:

疟疾仍是人类健康和经济发展的重大的全球性的威胁。恶性疟疾感染的红细胞所引发的微血管损伤是病程严重的标志,导致高死亡率,特别是在撒哈拉以南非洲的儿童中。

在本研究中,Haifa Almukadi等人采用噬菌体进行cDNA文库筛选的策略鉴别出恶性疟原虫谷氨酸富集蛋白(PfGARP)作为分泌型配体,可识别人红细胞阴离子交换体的胞外段(带3/AE1)作为宿主受体。

PfGARP的区域映射显示,不同的非重叠重复序列分别编码免疫应答表位和核心红细胞结合活性。红细胞结合的PfGARP的重复序列中的多肽序列可诱导红细胞聚集。利用免疫原性重复序列中的多肽,研究人员开发出一种定量免疫分析方法,可检测患者血浆中对PfGARP所产生的选择性免疫应答,提示PfGARP有望成为病程的生物标志物。

总而言之,本研究表明PfGARP可能通过带3蛋白作为宿主受体增强人类红细胞的黏附性。因此,研究人员推测免疫性和药物性抑制PfGARP或可成为减轻脑和妊娠相关疟疾损伤的新治疗方案。


原始出处:

Haifa Almukadi,et al.Human erythrocyte band 3 is a host receptor for Plasmodium falciparum glutamic acid-rich protein. Blood 2018 :blood-2018-07-865451; doi: https://doi.org/10.1182/blood-2018-07-865451 

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    2019-01-08 1ddf0692m34(暂无匿称)

    学习了,长知识

    0

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    2019-01-06 明月清辉

    谢谢分享,学习了

    0

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    2019-01-06 深海的鱼

    学习学习学习

    0

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    2019-01-06 天地飞扬

    了解一下,谢谢分享!

    0

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    2019-01-06 yjs木玉

    学习学习再学习

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