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由缺失细胞百日咳疫苗中存在的抗原同源物的博德特氏菌支气管败血亚种介导的跨种保护。

Cross-species protection mediated by a Bordetella bronchiseptica strain lacking antigenic homologs present in acellular pertussis vaccines.

机构信息

Department of Microbiology and Immunology, Wake Forest University Health Sciences, Medical Center Blvd., Gray 5086, Winston-Salem, NC 27157, USA.

出版信息

Infect Immun. 2010 May;78(5):2008-16. doi: 10.1128/IAI.01142-09. Epub 2010 Feb 22.

Abstract

The Bordetella species are Gram-negative bacterial pathogens that are characterized by long-term colonization of the mammalian respiratory tract and are causative agents of respiratory diseases in humans and animals. Despite widespread and efficient vaccination, there has been a world-wide resurgence of pertussis, which remains the leading cause of vaccine-preventable death in developed countries. It has been proposed that current acellular vaccines (Pa) composed of only a few bacterial proteins may be less efficacious because of vaccine-induced antigenic shifts and adaptations. To gain insight into the development of a newer generation of vaccines, we constructed a Bordetella bronchiseptica strain (LPaV) that does not express the antigenic homologs included in any of the Pa vaccines currently in use. This strain also lacks adenylate cyclase toxin, an essential virulence factor, and BipA, a surface protein. While LPaV colonized the mouse nose as efficiently as the wild-type strain, it was highly deficient in colonization of the lower respiratory tract and was attenuated in induction of inflammation and injury to the lungs. Strikingly, to our surprise, we found that in an intranasal murine challenge model, LPaV elicited cross-species protection against both B. bronchiseptica and Bordetella pertussis. Our data suggest the presence of immunogenic protective components other than those included in the pertussis vaccine. Combined with the whole-genome sequences of many Bordetella spp. that are available, the results of this study should serve as a platform for strategic development of the next generation of acellular pertussis vaccines.

摘要

鲍特氏菌属是革兰氏阴性细菌病原体,其特征是长期定植于哺乳动物的呼吸道,是人类和动物呼吸道疾病的病原体。尽管广泛且有效的疫苗接种,百日咳在世界范围内仍有复燃,这仍然是发达国家可预防疫苗死亡的主要原因。有人提出,目前仅由几种细菌蛋白组成的无细胞疫苗(Pa)可能效果较差,因为疫苗诱导的抗原转变和适应。为了深入了解新一代疫苗的发展,我们构建了一种不表达当前使用的任何 Pa 疫苗中包含的抗原同源物的支气管败血鲍特氏菌(LPaV)菌株。该菌株还缺乏腺嘌呤环化酶毒素,这是一种必需的毒力因子,以及表面蛋白 BipA。虽然 LPaV 像野生型菌株一样有效地定植于小鼠鼻腔,但它在下呼吸道的定植能力严重不足,并且在诱导肺部炎症和损伤方面减弱。令人惊讶的是,我们发现,在鼻腔内的小鼠挑战模型中,LPaV 引发了针对支气管败血鲍特氏菌和百日咳鲍特氏菌的交叉物种保护。我们的数据表明,除了百日咳疫苗中包含的那些之外,还存在免疫原性保护成分。结合许多鲍特氏菌属的全基因组序列,这项研究的结果应该可以作为下一代无细胞百日咳疫苗的战略发展平台。

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