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Anti-PfGARP activates programmed cell death of parasites and reduces severe malaria

机译:抗pFGARP激活寄生虫的编程细胞死亡并减少严重的疟疾

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摘要

Malaria caused by Plasmodium falciparum remains the leading single-agent cause of mortality in children(1), yet the promise of an effective vaccine has not been fulfilled. Here, using our previously described differential screening method to analyse the proteome of blood-stage P. falciparum parasites(2), we identify P. falciparum glutamic-acid-rich protein (PfGARP) as a parasite antigen that is recognized by antibodies in the plasma of children who are relatively resistant-but not those who are susceptible-to malaria caused by P. falciparum. PfGARP is a parasite antigen of 80 kDa that is expressed on the exofacial surface of erythrocytes infected by early-to-late-trophozoite-stage parasites. We demonstrate that antibodies against PfGARP kill trophozoite-infected erythrocytes in culture by inducing programmed cell death in the parasites, and that vaccinating non-human primates with PfGARP partially protects against a challenge with P. falciparum. Furthermore, our longitudinal cohort studies showed that, compared to individuals who had naturally occurring anti-PfGARP antibodies, Tanzanian children without anti-PfGARP antibodies had a 2.5-fold-higher risk of severe malaria and Kenyan adolescents and adults without these antibodies had a twofold-higher parasite density. By killing trophozoite-infected erythrocytes, PfGARP could synergize with other vaccines that target parasite invasion of hepatocytes or the invasion of and egress from erythrocytes.Antibodies against Plasmodium falciparum glutamic-acid-rich protein (PfGARP), an antigen expressed on the surface of infected red blood cells, kill P. falciparum parasites by inducing programmed cell death and reduce the risk of severe malaria.
机译:由疟原虫引起的疟疾仍然是儿童死亡率的领先单孕原因(1),但尚未满足有效疫苗的承诺。在这里,使用先前描述的差分筛选方法来分析血液阶段P. falciparum寄生虫(2)的蛋白质组,我们鉴定富含寄生虫抗原的p. falciparum谷氨酸 - 富含蛋白(pfgarp),其抗体抗体患儿的血浆相对抗性 - 但不是那些易受p.Malciparum造成的疟疾的血浆。 pfgarp是80kDa的寄生虫抗原,其在早期滋养的寄生虫的红细胞的外萝卜表面上表达。我们证明,通过在寄生虫中诱导编程的细胞死亡,对Pfgarp的抗体杀死培养物中的滋养化物感染的红细胞,并且用pfgarp接种非人类原始化物部分地保护攻击p. falciparum的攻击。此外,我们的纵向队列研究表明,与天然存在的抗PFGARP抗体的个体相比,坦桑尼儿童没有抗pFGARP抗体的儿童具有2.5倍的严重疟疾和肯尼亚青少年的风险,没有这些抗体的成人具有双重-higher寄生虫密度。通过杀死滋养化物感染的红细胞,Pfgarp可以与其他疫苗促进寄生虫侵袭肝细胞的侵袭或从红细胞的侵袭和出口的侵袭。抗疟药富含疟原虫谷氨酸富含蛋白质(PFGARP),在感染表面上表达的抗原红细胞,通过诱导程序性细胞死亡并降低严重疟疾的风险来杀死P. falciparum寄生虫。

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  • 来源
    《Nature》 |2020年第7810期|104-108|共5页
  • 作者单位

    Brown Univ Rhode Isl Hosp Med Sch Ctr Int Hlth Res Providence RI 02903 USA|Brown Univ Dept Pathol & Lab Med Med Sch Providence RI 02912 USA;

    Brown Univ Rhode Isl Hosp Med Sch Ctr Int Hlth Res Providence RI 02903 USA|Brown Univ Dept Pathol & Lab Med Med Sch Providence RI 02912 USA;

    Brown Univ Rhode Isl Hosp Med Sch Ctr Int Hlth Res Providence RI 02903 USA|Brown Univ Dept Pathol & Lab Med Med Sch Providence RI 02912 USA;

    Brown Univ Rhode Isl Hosp Med Sch Ctr Int Hlth Res Providence RI 02903 USA|Brown Univ Dept Pathol & Lab Med Med Sch Providence RI 02912 USA;

    Brown Univ Rhode Isl Hosp Med Sch Ctr Int Hlth Res Providence RI 02903 USA;

    Brown Univ Rhode Isl Hosp Med Sch Ctr Int Hlth Res Providence RI 02903 USA|Brown Univ Dept Pathol & Lab Med Med Sch Providence RI 02912 USA;

    Brown Univ Rhode Isl Hosp Med Sch Ctr Int Hlth Res Providence RI 02903 USA;

    Boston Childrens Hosp Div Infect Dis Boston MA USA|Harvard Med Sch Dept Pediat Boston MA 02115 USA;

    Brown Univ Rhode Isl Hosp Med Sch Ctr Int Hlth Res Providence RI 02903 USA|Brown Univ Dept Pathol & Lab Med Med Sch Providence RI 02912 USA;

    Brown Univ Rhode Isl Hosp Med Sch Ctr Int Hlth Res Providence RI 02903 USA|Univ Calif Davis Dept Microbiol & Mol Genet Davis CA 95616 USA;

    Florida Atlantic Univ Charles E Schmidt Coll Med Boca Raton FL 33431 USA;

    Florida Atlantic Univ Charles E Schmidt Coll Med Boca Raton FL 33431 USA;

    Florida Atlantic Univ Charles E Schmidt Coll Med Boca Raton FL 33431 USA;

    Brown Univ Rhode Isl Hosp Med Sch Ctr Int Hlth Res Providence RI 02903 USA|Brown Univ Dept Pathol & Lab Med Med Sch Providence RI 02912 USA;

    Brown Univ Rhode Isl Hosp Med Sch Ctr Int Hlth Res Providence RI 02903 USA|Brown Univ Dept Pathol & Lab Med Med Sch Providence RI 02912 USA;

    Brown Univ Dept Pathol & Lab Med Med Sch Providence RI 02912 USA;

    Yale Univ Dept Internal Med New Haven CT USA|Yale Univ Dept Microbial Pathogenesis New Haven CT USA;

    Seattle Biomed Res Inst Mother Offspring Malaria Studies MOMS Project 4 Nickerson St Seattle WA 98109 USA|Muheza Designated Dist Hosp Muheza Tanzania|Muhimbili Univ Hlth & Allied Sci Dar Es Salaam Tanzania;

    Ctr Dis Control & Prevent Infect Dis Pathol Branch Atlanta GA USA;

    NIAID Lab Malaria Immunol & Vaccinol NIH Rockville MD USA;

    NIAID Lab Malaria Immunol & Vaccinol NIH Rockville MD USA;

    Columbia Univ Irving Med Ctr Dept Microbiol & Immunol New York NY USA;

    Columbia Univ Irving Med Ctr Dept Microbiol & Immunol New York NY USA|Columbia Univ Div Infect Dis Irving Med Ctr Dept Med New York NY USA;

    Brown Univ Rhode Isl Hosp Med Sch Ctr Int Hlth Res Providence RI 02903 USA|Univ Seoul Grad Sch Urban Publ Hlth Seoul South Korea;

    Boston Childrens Hosp Div Infect Dis Boston MA USA|Harvard Med Sch Dept Pediat Boston MA 02115 USA;

    Univ Penn Dept Med Philadelphia PA 19104 USA;

    Univ Penn Dept Med Philadelphia PA 19104 USA;

    Acuitas Therapeut Vancouver BC Canada;

    Acuitas Therapeut Vancouver BC Canada;

    Brown Univ Rhode Isl Hosp Med Sch Ctr Int Hlth Res Providence RI 02903 USA|Brown Univ Rhode Isl Hosp Dept Pediat Med Sch Providence RI 02903 USA;

    NIAID Lab Malaria Immunol & Vaccinol NIH Rockville MD USA;

    NIAID Lab Malaria Immunol & Vaccinol NIH Rockville MD USA;

    Brown Univ Rhode Isl Hosp Med Sch Ctr Int Hlth Res Providence RI 02903 USA|Brown Univ Dept Pathol & Lab Med Med Sch Providence RI 02912 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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