Listerta monocytogenes as a vaccine vector:: Virulence attenuation or existing antivector immunity does not diminish therapeutic efficacy

被引:75
作者
Starks, H
Bruhn, KW
Shen, H
Barry, RA
Dubensky, TW
Brockstedt, D
Hinrichs, DJ
Higgins, DE
Miller, JF
Giedlin, M
Bouwer, HGA
机构
[1] Oregon Hlth & Sci Univ, Vet Affairs Med Ctr, Earle A Chiles Res Inst, Dept Mol Microbiol & Immunol, Portland, OR 97201 USA
[2] Univ Calif Los Angeles, Dept Microbiol, Los Angeles, CA 90024 USA
[3] Univ Penn, Sch Med, Dept Microbiol, Philadelphia, PA 19104 USA
[4] Harvard Univ, Sch Med, Dept Microbiol & Mol Genet, Boston, MA 02115 USA
[5] Cerus Corp, Concord, CA 94520 USA
关键词
D O I
10.4049/jimmunol.173.1.420
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
The bacterium L monocytogenes is a proposed vaccine carrier based upon the observation that this pathogen replicates within the intracytoplasmic environment facilitating delivery of Ag to the endogenous Ag processing and presentation pathway with subsequent stimulation of peptide specific MHC class I-restricted CD8(+) effector cells. In this report, we evaluate virulence-attenuated strains of Listeria monocytogenes as vaccine vectors and examine whether existing antivector (antilisterial) immunity limits or alters its efficacy as a therapeutic cancer vaccine. Following immunization with virulence-attenuated mutants, we found that the effectiveness of L. monocytogenes as a recombinant cancer vaccine remains intact. In addition, we found that antibiotic treatment initiated 24 or 36 h following therapeutic immunization with recombinant L. monocytogenes allows full development of the antitumor response. We also demonstrate that the vaccine vector potential of L. monocytogenes is not limited in animals with existing antilisterial immunity. For these latter studies, mice previously immunized with wild-type L. monocytogenes were infused with melanoma cells and then 5 days later challenged with recombinant tumor Ag expressing L. monocytogenes. Collectively, these results add additional support for the use of L. monocytogenes as a vaccine vector and underscore its potential to be used repeatedly for stimulation of recall responses concomitant with primary cell-mediated responses to newly delivered heterologous tumor-associatedepitopes.
引用
收藏
页码:420 / 427
页数:8
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