Recombinant attenuated Listeria monocytogenes vaccine expressing Francisella tularensis IglC induces protection in mice against aerosolized Type A F. tularensis.

Recombinant attenuated Listeria monocytogenes vaccine expressing Francisella tularensis IglC induces protection in mice against aerosolized Type A F. tularensis.
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DOI:
10.1016/j.vaccine.2008.12.014
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发表时间:
2009-02-18
期刊:
影响因子:
5.5
通讯作者:
Horwitz MA
Horwitz MA
中科院分区:
医学3区
文献类型:
--
作者:
Jia Q;Lee BY;Clemens DL;Bowen RA;Horwitz MA

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土拉热病的病原体土拉弗兰西菌 (Fransicella tularensis) 属于潜在生物恐怖主义的顶级类别(A 类)。为了开发一种更安全的针对雾化土拉杆菌的疫苗,我们采用了减毒单核细胞增生李斯特菌,它与土拉杆菌具有细胞内和吞噬体外的生活方式,作为土拉杆菌抗原的递送载体。我们构建了稳定表达包括 IglC (rLm/iglC) 在内的 7 种土拉杆菌蛋白的重组单核细胞增生李斯特菌 (rLm) 疫苗,并测试了其免疫原性和对小鼠致死性土拉杆菌攻击的保护效果。用 rLm/iglC 皮内免疫的小鼠对土拉弗朗西斯菌 IglC 产生了显着的细胞免疫反应,如淋巴细胞增殖以及干扰素 γ 的 CD4+ 和 CD8+ T 细胞胞内表达所证明。此外,用 rLm/iglC 免疫的小鼠可以免受通过鼻内途径施用的土拉菌 LVS 的致命攻击,该途径选择模拟空气传播感染,最重要的是,可以抵抗高毒力 A 型土拉菌 SchuS4 菌株的气溶胶攻击。
Fransicella tularensis, the causative agent of tularemia, is in the top category (Category A) of potential agents of bioterrorism. To develop a safer vaccine against aerosolized F. tularensis, we have employed an attenuated Listeria monocytogenes, which shares with F. tularensis an intracellular and extraphagosomal lifestyle, as a delivery vehicle for F. tularensis antigens. We constructed recombinant L. monocytogenes (rLm) vaccines stably expressing 7 F. tularensis proteins including IglC (rLm/iglC), and tested their immunogenicity and protective efficacy against lethal F. tularensis challenge in mice. Mice immunized intradermally with rLm/iglC developed significant cellular immune responses to F. tularensis IglC as evidenced by lymphocyte proliferation and CD4+ and CD8+ T-cell intracellular expression of interferon gamma. Moreover, mice immunized with rLm/iglC were protected against lethal challenge with F. tularensis LVS administered by the intranasal route, a route chosen to mimic airborne infection, and, most importantly, against aerosol challenge with the highly virulent Type A F. tularensis SchuS4 strain.
DOI: 10.1016/j.vaccine.2008.07.051
发表时间: 2008-09-26
期刊: Vaccine
影响因子: 5.5
作者:
Bakshi CS;Malik M;Mahawar M;Kirimanjeswara GS;Hazlett KR;Palmer LE;Furie MB;Singh R;Melendez JA;Sellati TJ;Metzger DW
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DOI: 10.1196/annals.1409.012
发表时间: 2007-01-01
期刊: FRANCISELLA TULARENSIS: BIOLOGY, PATHOGENICITY, EPIDEMIOLOGY, AND BIODEFENSE
影响因子: --
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