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Mucosal delivery of live Lactococcus lactis expressing functionally active JlpA antigen induces potent local immune response and prevent enteric colonization of Campylobacter jejuni in chickens.
Vaccine ( IF 5.5 ) Pub Date : 2020-01-10 , DOI: 10.1016/j.vaccine.2019.12.064
Chandan Gorain 1 , Ankita Singh 1 , Sudipta Bhattacharyya 1 , Anirban Kundu 1 , Aritraa Lahiri 1 , Subhadeep Gupta 1 , Amirul I Mallick 1
Affiliation  

Successful colonization of the mucosal epithelial cells is the key early step for Campylobacter jejuni (C. jejuni) pathogenesis in humans. A set of Surface Exposed Colonization Proteins (SECPs) are known to take leading role in bacterial adhesion and subsequent host pathogenesis. Among the major SECPs, the constitutively expressed C. jejuni surface lipoprotein Jejuni lipoprotein A (JlpA), interacts with intestinal heat shock protein 90α (Hsp90α) and contributes in disease progression by triggering pro-inflammatory responses via activation of NF-κB and p38 MAP kinase pathways. In addition to its ability to express on the surface, high sequence conservation of JlpA protein among different Campylobacter spp make it a suitable vaccine target against C. jejuni. Given that chickens are the primary source for C. jejuni infection in humans and persistent cecal colonization significantly contribute in pathogen transmission, we explicitly used chickens as a model to test the immune-protective efficacy of JlpA protein. Taking into account that gastro-intestinal tract is the major site for C. jejuni colonization, we chose to use mucosal (intragastric) route as mode for JlpA antigen delivery. To deliver JlpA via mucosal route, we engineered a food grade Lactic acid producing bacteria, Lactococcus lactis (L. lactis) to express functionally active JlpA protein in the surface. Further, we demonstrated its ability to substantially improve the antigen specific local immune responses in the intestine along with significant immune-protection against enteric colonization of C. jejuni in chickens.

中文翻译:

表达功能活性JlpA抗原的活乳球菌的粘膜递送可诱导强效的局部免疫反应,并防止空肠弯曲杆菌在肠道中的肠道定殖。

黏膜上皮细胞的成功定殖是空肠弯曲杆菌(C. jejuni)发病机理的关键早期步骤。已知一组表面暴露的定殖蛋白(SECP)在细菌粘附和随后的宿主发病机理中起主要作用。在主要的SECP中,组成型表达的空肠弯曲杆菌表面脂蛋白空肠脂蛋白A(JlpA)与肠道热休克蛋白90α(Hsp90α)相互作用,并通过激活NF-κB和p38 MAP触发促炎反应来促进疾病进展激酶途径。除了在表面表达的能力外,不同弯曲杆​​菌属物种中JlpA蛋白的高序列保守性使其成为针对空肠弯曲杆菌的合适疫苗靶标。鉴于鸡是C的主要来源。空肠感染和持续盲肠定植显着促进病原体的传播,我们明确使用鸡作为模型来测试JlpA蛋白的免疫保护功效。考虑到胃肠道是空肠弯曲杆菌定殖的主要部位,我们选择使用粘膜(胃内)途径作为JlpA抗原递送的方式。为了通过粘膜途径递送JlpA,我们设计了食品级产乳酸菌乳酸乳球菌(L. lactis),以在表面表达功能性活性JlpA蛋白。此外,我们证明了其能够显着改善肠道中抗原特异性局部免疫反应的能力,以及针对鸡空肠弯曲杆菌肠道定殖的显着免疫保护作用。我们明确地以鸡为模型来测试JlpA蛋白的免疫保护功效。考虑到胃肠道是空肠弯曲杆菌定殖的主要部位,我们选择使用粘膜(胃内)途径作为JlpA抗原递送的方式。为了通过粘膜途径递送JlpA,我们设计了食品级产乳酸菌乳酸乳球菌(L. lactis),以在表面表达功能性活性JlpA蛋白。此外,我们证明了其具有显着改善肠道内抗原特异性局部免疫反应的能力,以及针对鸡空肠弯曲杆菌肠道定殖的显着免疫保护作用。我们明确使用鸡作为模型来测试JlpA蛋白的免疫保护功效。考虑到胃肠道是空肠弯曲杆菌定殖的主要部位,我们选择使用粘膜(胃内)途径作为JlpA抗原递送的方式。为了通过粘膜途径递送JlpA,我们设计了食品级产乳酸菌乳酸乳球菌(L. lactis),以在表面表达功能性活性JlpA蛋白。此外,我们证明了其能够显着改善肠道中抗原特异性局部免疫反应的能力,以及针对鸡空肠弯曲杆菌肠道定殖的显着免疫保护作用。我们选择使用粘膜(胃内)途径作为JlpA抗原递送的方式。为了通过粘膜途径递送JlpA,我们设计了食品级产乳酸菌乳酸乳球菌(L. lactis),以在表面表达功能性活性JlpA蛋白。此外,我们证明了其能够显着改善肠道中抗原特异性局部免疫反应的能力,以及针对鸡空肠弯曲杆菌肠道定殖的显着免疫保护作用。我们选择使用粘膜(胃内)途径作为JlpA抗原递送的方式。为了通过粘膜途径递送JlpA,我们设计了食品级产乳酸菌乳酸乳球菌(L. lactis),以在表面表达功能活跃的JlpA蛋白。此外,我们证明了其能够显着改善肠道中抗原特异性局部免疫反应的能力,以及针对鸡空肠弯曲杆菌肠道定殖的显着免疫保护作用。
更新日期:2020-01-11
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