1. Prominent IL-12 Production and Tumor Reduction in Athymic Nude Mice after Toxoplasma gondii Lysate Antigen Treatment.
- Author
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Kyoung-Ho Pyo, Bong-Kwang Jung, Chun-Feng Xin, You-Won Lee, Jong-Yil Chai, and Eun-Hee Shin
- Subjects
NUDE mouse ,TOXOPLASMA gondii ,CD31 antigen ,NEOVASCULARIZATION ,NEOPLASTIC cell transformation ,INTERLEUKIN-12 - Abstract
Toxoplasma gondii is an intracellular protozoan parasite that causes a Th1 cellular immunity. Our previous study showed that T. gondii lysate antigen (TLA) treatment in S180 tumor-bearing mice resulted in tumor reduction by suppressing CD31 expression, a marker of angiogenesis. In the present study, to investigate tumor suppressive effect of TLA under the absence of T lymphocytes, athymic nude mice were compared with euthymic mice in the anti-tumorigenic effect triggered by TLA in CT26 tumors. According to the results, intratumorally injected TLA reduced tumor growth and TIMP-1 level, a metastatic marker, in both euthymic and athymic mice. TLA treatment led to a sharp increase in IL-12 expression in serum cytokine profiling of athymic mice, and increased MyD88 signals in macrophages derived from the bone marrow, implying the activation of innate immunity. The selective induction of IL-12 by TLA treatment had an anti-tumorigenic effect. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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