Immunization with recombinant truncated Neisseria meningitidis-Macrophage Infectivity Potentiator (rT-Nm-MIP) protein induces murine antibodies that are cross-reactive and bactericidal for Neisseria gonorrhoeae.

Immunization with recombinant truncated Neisseria meningitidis-Macrophage Infectivity Potentiator (rT-Nm-MIP) protein induces murine antibodies that are cross-reactive and bactericidal for Neisseria gonorrhoeae.
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DOI:
10.1016/j.vaccine.2018.05.069
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发表时间:
2018-06-22
期刊:
影响因子:
5.5
通讯作者:
Christodoulides M
Christodoulides M
中科院分区:
医学3区
文献类型:
--
作者:
Humbert MV;Christodoulides M

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rT-N 的抗原性。脑膜炎球菌-MIP 疫苗批次在小鼠中是可重复的。 rT-Nm-MIP 抗体与表面 Ng-MIP 发生交叉反应并粘附在淋球菌上。 rT-Nm-MIP 抗血清对淋球菌具有交叉杀菌作用。脑膜炎球菌 OM 可以被设计来表达 T-Nm-MIP。脑膜炎奈瑟菌 (Nm) 和淋病奈瑟菌 (Ng) 在其外膜 (OM) 中表达巨噬细胞感染增强剂 (MIP、NMB1567/NEIS1487) 蛋白。在本研究中,我们制备了独立批次的含有等位基因2编码的重组截短Nm-MIP蛋白(rT-Nm-MIP,氨基酸22-142)的脂质体(n=3)和脂质体+单磷酰脂质A(MPLA)(n=3),并用它们免疫小鼠。我们测试了以下假设:独立疫苗批次显示出相似的抗原性,并且抗血清可以识别脑膜炎球菌和淋球菌 MIP 并诱导跨物种杀菌活性。不同批次的M2 rT-Nm-MIP-脂质体±MPLA的抗原性批次间差异不显着(P>0.05)。抗 rT-Nm-MIP 血清与 OM 中和活细菌细胞表面的 Nm-MIP 和 Ng-MIP 具有相同且特异的反应。与 Δmip 细菌没有抗血清反应性,显示了特异性。使用人补体/血清杀菌测定,抗 M2 rT-Nm-MIP 血清杀死同源脑膜炎球菌血清群 B (MenB) 菌株(抗 rT-Nm-MIP-脂质体血清的中位滴度为 32-64;抗 rT-Nm-MIP-脂质体+MPLA 血清的中位滴度为 128-256)和异源 M1表达蛋白的 MenB 菌株(抗 rT-Nm-MIP-脂质体血清滴度为 64;抗 rT-Nm-MIP-脂质体+MPLA 血清滴度为 128-256)。对于表达 M7 蛋白的 MenB 分离株(滴度 4-8)观察到低水平杀伤(P<0.05),但表达 M6 蛋白的 MenB 菌株未被杀死(滴度<4-8)。观察到对表达同源 M2 蛋白的 MenC 和 MenW 细菌(滴度为 8-16)的杀伤(P<0.05),但对 MenA 或 MenY 细菌(滴度<4-8)没有观察到杀伤作用。 M2 rT-Nm-MIP 抗血清对淋球菌菌株 P9-17(表达 M35 Ng-MIP,滴度 64-512)和菌株 12CFX_T_003(表达 M10 Ng-MIP,滴度 8-16)显示出显着的(P<0.05)交叉杀菌活性,但对 FA1090(表达 M8)没有显着的交叉杀菌活性。 NG-MIP)。作为生产重组蛋白的替代方案,我们成功地设计了 Nm-OM 来表达 M2 截短的 Nm-MIP,但用 Na-DOC 提取脂寡糖是禁忌的。我们的数据表明,需要含有一定数量的 Nm- 和 Ng-MIP 型蛋白的多组分疫苗才能广泛覆盖这两种病原体。
Antigenicity of rT-N. meningitidis-MIP vaccine batches is reproducible in mice. Antibodies to rT-Nm-MIP cross-react with surface Ng-MIP and adhere to gonococci. Antisera to rT-Nm-MIP are cross-bactericidal for gonococci. Meningococcal OM can be engineered to express T-Nm-MIP. Neisseria meningitidis (Nm) and N. gonorrhoeae (Ng) express a Macrophage Infectivity Potentiator (MIP, NMB1567/NEIS1487) protein in their outer membrane (OM). In this study, we prepared independent batches of liposomes (n = 3) and liposomes + MonoPhosphoryl Lipid A (MPLA) (n = 3) containing recombinant truncated Nm-MIP protein encoded by Allele 2 (rT-Nm-MIP, amino acids 22–142), and used these to immunize mice. We tested the hypothesis that independent vaccine batches showed similar antigenicity, and that antisera could recognise both meningococcal and gonococcal MIP and induce cross-species bactericidal activity. The different batches of M2 rT-Nm-MIP-liposomes ± MPLA showed no significant (P > 0.05) batch-to-batch variation in antigenicity. Anti-rT-Nm-MIP sera reacted equally and specifically with Nm-MIP and Ng-MIP in OM and on live bacterial cell surfaces. Specificity was shown by no antiserum reactivity with Δmip bacteria. Using human complement/serum bactericidal assays, anti-M2 rT-Nm-MIP sera killed homologous meningococcal serogroup B (MenB) strains (median titres of 32–64 for anti-rT-Nm-MIP-liposome sera; 128–256 for anti-rT-Nm-MIP-liposome + MPLA sera) and heterologous M1 protein-expressing MenB strains (titres of 64 for anti rT-Nm-MIP-liposome sera; 128–256 for anti-rT-Nm-MIP-liposome + MPLA sera). Low-level killing (P < 0.05) was observed for a MenB isolate expressing M7 protein (titres 4–8), but MenB strains expressing M6 protein were not killed (titre < 4–8). Killing (P < 0.05) was observed against MenC and MenW bacteria expressing homologous M2 protein (titres of 8–16) but not against MenA or MenY bacteria (titres < 4–8). Antisera to M2 rT-Nm-MIP showed significant (P < 0.05) cross-bactericidal activity against gonococcal strain P9-17 (expressing M35 Ng-MIP, titres of 64–512) and strain 12CFX_T_003 (expressing M10 Ng-MIP, titres 8–16) but not against FA1090 (expressing M8 Ng-MIP). As an alternative to producing recombinant protein, we engineered successfully the Nm-OM to express M2 Truncated–Nm-MIP, but lipooligosaccharide-extraction with Na-DOC was contra-indicated. Our data suggest that a multi-component vaccine containing a select number of Nm- and Ng-MIP type proteins would be required to provide broad coverage of both pathogens.
人类全血和诱变研究中脑膜炎的转录组分析确定了与血液存活有关的毒力因子。
DOI: 10.1371/journal.ppat.1002027
发表时间: 2011-05
期刊: PLoS pathogens
影响因子: 6.7
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