Recognition of Neisseria meningitidis by the long pentraxin PTX3 and its role as an endogenous adjuvant.

Recognition of Neisseria meningitidis by the long pentraxin PTX3 and its role as an endogenous adjuvant.
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DOI:
10.1371/journal.pone.0120807
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发表时间:
2015
期刊:
影响因子:
3.7
通讯作者:
Mantovani A
Mantovani A
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Bottazzi B;Santini L;Savino S;Giuliani MM;Dueñas Díez AI;Mancuso G;Beninati C;Sironi M;Valentino S;Deban L;Garlanda C;Teti G;Pizza M;Rappuoli R;Mantovani A

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长五肽3(PTX3)是天然免疫体液臂的非冗余成分。本研究旨在研究PTX3与脑膜炎奈瑟菌的相互作用。PTX3结合的无囊性脑膜炎球菌、奈瑟氏菌来源的外膜小泡(OMV)和3种选定的脑膜炎球菌抗原(GNA0667、GNA1030和GNA2091)。PTX3识别的微生物部分是完成基本微生物功能的保守结构。在OMV免疫方案中,Ptx3缺陷小鼠的抗体应答较低,联合应用PTX3可增强抗体应答,尤其是在Ptx3缺陷小鼠。给予PTX3可降低感染脑膜炎奈瑟菌的幼鼠的细菌负荷。这些结果表明,PTX3识别脑膜炎奈瑟菌的一组保守结构,并作为对该细菌的反应的放大/内源性佐剂。
Long pentraxin 3 (PTX3) is a non-redundant component of the humoral arm of innate immunity. The present study was designed to investigate the interaction of PTX3 with Neisseria meningitidis. PTX3 bound acapsular meningococcus, Neisseria-derived outer membrane vesicles (OMV) and 3 selected meningococcal antigens (GNA0667, GNA1030 and GNA2091). PTX3-recognized microbial moieties are conserved structures which fulfil essential microbial functions. Ptx3-deficient mice had a lower antibody response in vaccination protocols with OMV and co-administration of PTX3 increased the antibody response, particularly in Ptx3-deficient mice. Administration of PTX3 reduced the bacterial load in infant rats challenged with Neisseria meningitidis. These results suggest that PTX3 recognizes a set of conserved structures from Neisseria meningitidis and acts as an amplifier/endogenous adjuvant of responses to this bacterium.
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