A malaria vaccine adjuvant based on recombinant antigen binding to liposomes.

A malaria vaccine adjuvant based on recombinant antigen binding to liposomes.
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DOI:
10.1038/s41565-018-0271-3
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发表时间:
2018-12
影响因子:
38.3
通讯作者:
Lovell JF
Lovell JF
中科院分区:
材料科学1区
文献类型:
--
作者:
Huang WC;Deng B;Lin C;Carter KA;Geng J;Razi A;He X;Chitgupi U;Federizon J;Sun B;Long CA;Ortega J;Dutta S;King CR;Miura K;Lee SM;Lovell JF

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pfs25是一种阻断疟疾传播的疫苗候选抗原,但其在人体内明显有限的免疫原性阻碍了临床开发。在这里,我们表明,重组,组氨酸标记的Pfs25可以在免疫时与预先形成的含有钴卟啉磷脂(CoPoP)的脂质体混合,导致自发的纳米脂质体抗原颗粒化(SNAP)。通过在CoPoP双层中插入His标签,抗原以均匀取向的展示稳定地呈递,而没有抗原构象的共价修饰或破坏。小鼠和兔的SNAP免疫耐受性良好,具有最小的局部反应原性,并且与其他"混合注射"佐剂相比,导致数量级更高的功能性抗体产生。在转运至引流淋巴结期间,血清稳定的抗原结合导致吞噬性抗原呈递细胞的抗原摄取增强,随后产生长寿命的抗原特异性浆细胞。与四个额外的his-标记的恶性疟原虫多肽的无缝多路复用诱导强和平衡的抗体产生,说明了开发具有SNAP免疫的多阶段颗粒疫苗的简单性。
Pfs25 is a malaria transmission-blocking vaccine antigen candidate, but its apparently limited immunogenicity in humans has hindered clinical development. Here, we show that recombinant, his-tagged Pfs25 can be mixed at the time of immunization with pre-formed liposomes containing cobalt-porphyrin-phospholipid (CoPoP), resulting in spontaneous nanoliposome antigen particleization (SNAP). Antigens are stably presented in uniformly-oriented display via his-tag insertion in the CoPoP bilayer, without covalent modification or disruption of antigen conformation. SNAP immunization of mice and rabbits is well tolerated with minimal local reactogenicity and results in orders-of-magnitude higher functional antibody generation compared to other “mix-and-inject” adjuvants. Serum-stable antigen-binding during transit to draining lymph nodes leads to enhanced antigen uptake by phagocytic antigen presenting cells, with subsequent generation of long-lived, antigen-specific plasma cells. Seamless multiplexing with four additional his-tagged Plasmodium falciparum polypeptides induces strong and balanced antibody production, illustrating the simplicity of developing multi-stage particulate vaccines with SNAP immunization.
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