Enhancement by Recombinant Human Interleukin 2 of Host Resistance to <i>Toxoplasma gondii</i> Infection in Pregnant Mice
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- Shirahata Toshikazu
- Department of Veterinary Microbiology, Obihiro University of Agriculture and Veterinary Medicine
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- Muroya Naoyoshi
- Department of Veterinary Microbiology, Obihiro University of Agriculture and Veterinary Medicine
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- Ohta Chikako
- Department of Veterinary Microbiology, Obihiro University of Agriculture and Veterinary Medicine
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- Goto Hitoshi
- Department of Veterinary Microbiology, Obihiro University of Agriculture and Veterinary Medicine
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- Nakane Akio
- Department of Microbiology, Hokkaido University School of Medicine
抄録
The lymphokine production by pregnant mice infected with a lethal dose of Toxoplasma gondii was evaluated in comparison with that by virgin mice infected with a sublethal dose of this protozoan parasite. Splenocytes taken from mice before and on the day after infection produced considerable amounts of IL-2 in response to concanavalin A (Con A) stimulation, but the titers rapidly declined in both pregnant and virgin mice as infection progressed. A trace amount or undetectable level of IL-2 was produced by splenocytes from acutely infected mice when stimulated with Toxoplasma lysate antigen (TLA). In contrast to the kinetics of IL-2 production, the levels of IFN-γ produced by splenocytes cultured with Con A or TLA increased steadily in the later stage of infection in both pregnant and virgin mice. Thus, the response to Con A or TLA of splenocytes to produce IL-2 and IFN-γ differed strikingly in acute toxoplasmosis in mice. The administration of rHuIL-2 resulted in a significant decrease in the mortality of pregnant mice infected with a lethal dose of Toxoplasma. The combination of rHuIL-2 and rMuIFN-γ increased the survival rate slightly but not significantly compared with pregnant mice receiving either rHuIL-2 or rMuIFN-γ. Moreover, exogenously administered rHuIL-2 enhanced the production of both IFN-α and IFN-γ in the bloodstreams of pregnant mice, in accordance with the decreased mortality. These results indicate that IL-2 may play a significant role in modulating the host defense against Toxoplasma infection in pregnant mice.
収録刊行物
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- MICROBIOLOGY and IMMUNOLOGY
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MICROBIOLOGY and IMMUNOLOGY 37 (7), 583-590, 1993
Center For Academic Publications Japan
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詳細情報 詳細情報について
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- CRID
- 1572543027965330176
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- NII論文ID
- 130003483993
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- ISSN
- 03855600
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- 本文言語コード
- en
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- データソース種別
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- CiNii Articles