| Project/Area Number |
14570234
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Bacteriology (including Mycology)
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| Research Institution | HAMAMATSU UNIVERSITY SCHOOL OF MEDICINE |
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Principal Investigator |
NAGATA Toshi HAMAMATSU UNIV, SCH MED, ASSOCIATE PROFESSOR, 医学部, 助教授 (90275024)
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| Co-Investigator(Kenkyū-buntansha) |
AOSHI Taiki HAMAMATSU UNIV, SCH MED, RESEARCH ASSOCIATE, 医学部, 助手 (10324344)
UCHIJIMA Masato HAMAMATSU UNIV, SCH MED, RESEARCH ASSOCIATE, 医学部, 助手 (20252174)
KOIDE Yukio HAMAMATSU UNIV, SCH MED, FULL PROFESSOR, 医学部, 教授 (30126809)
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| Project Period (FY) |
2002 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2003: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2002: ¥2,100,000 (Direct Cost: ¥2,100,000)
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| Keywords | Mycobacterium tuberculosis / Listeria monocytogenes / DNA vaccine / MPB / MPT51 / Antigen 85 complex / attenuated bacteria |
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| Research Abstract |
In this study, we showed the induction of specific protective cellular immunity against Mycobacterium tuberculosis employing vaccination with recombinant attenuated Listeria monocytogenes strains. We constructed self-destructing attenuated L. monocytogenes Δ2 strains carrying eukaryotic expression plasmids for Ag85 complex (Ag85A and Ag85B) and MPB/MPT51 molecules.
Infection of these recombinant bacteria allowed expression of the genes in J774A.1 murine macrophage cell line.
The intraperitoneal vaccination of C57BL/6 mice with these recombinant bacteria was capable of inducing purified protein derivative (PPD)-speciflc cellular immunities such as footpad reaction, proliferative responses of splenocytes and interferon-γ production from splenocyles, suggesting the efficacy of the vaccination against mycobacterial infection with these recombinant L. monocytogenes carrying eukaryotic expression plasmids for Ag85 family molecules. Furthermore, intravenous vaccination of these recombinant bacteria carrying expression plasmids for Ag85A, Ag85B, or MPB/MPT51 into BALB/c mice elicited significant protective responses comparable to those evoked by live BCG vaccine. Of note, it is the first report showing MPB/MPT51 is a major protective Ag as well as Ag85A and Ag85B, which have been reported to be major mycobacterial protective Ags.
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