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Induction of homologous immune response to Rickettsia tsutsugamushi Boryong with a partial 56-kilodalton recombinant antigen fused with the maltose-binding protein MBP-Bor56
- Publication Year :
- 1997
-
Abstract
- Although the 56-kDa protein of Rickettsia tsutsugamushi has been presumed to play important roles in generating protective immunity against scrub typhus, studies of this protein have been impeded. We used the recombinant 56-kDa protein of R. tsutsugamushi Boryong fused with the maltose-binding protein of Escherichia coli (MBP-Bor56) to analyze its ability to induce protective immunity in a C3H/HeDub murine model. Intraperitoneal immunization of mice with MBP-Bor56 resulted in an increase in the 50% minimal lethal dose of more than 160 times compared with that for the control mice. Splenic mononuclear cells from the mice immunized with MBP-Bor56 showed a dose-dependent pattern of lymphocyte proliferation response and secreted gamma interferon and interleukin-2 when stimulated with irradiated R. tsutsugamushi Boryong, which is a cytokine profile of Th1 cells. High titers of antibody to R. tsutsugamushi were also demonstrated by indirect immunofluorescent-antibody testing. These findings suggest that the 56-kDa protein of R. tsutsugamushi is one of the candidates for a vaccine against scrub typhus.
- Subjects :
- Cellular immunity
Recombinant Fusion Proteins
Immunology
Scrub typhus
Lymphocyte proliferation
Biology
Lymphocyte Activation
Microbiology
Interferon-gamma
Mice
Antigen
Bacterial Proteins
medicine
Animals
Antigens, Bacterial
Immunity
medicine.disease
biology.organism_classification
bacterial infections and mycoses
Virology
Orientia tsutsugamushi
Infectious Diseases
Rickettsiosis
Rickettsia
Humoral immunity
biology.protein
bacteria
Interleukin-2
Parasitology
Immunization
Antibody
Research Article
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....1e9051e65c5e69236776584434ca17b4