Loss of immunogenecity of liver dendritic cells from mouse with chronic hepatitis
Antigen presenting cells, especially the antigen presenting dendritic cells (DC) in the tissue, regulate the magnitude of antigen-specific immune response. A role of impaired and narrowly focused specific immune response has been implicated in the pathogenesis of chronic hepatitis due to hepatitis B virus and hepatitis C virus. In order to clarify this role, we studied liver DC from interferon γ (IFN-γ) transgenic mouse (TgM), an animal model of chronic hepatitis. These mice had high serum levels of alanine transaminase and histological evidence of chronic hepatitis. Transgene negative offspring (littermate control) with normal serum transaminase levels and without any evidence of hepatitis were used as controls. The stimulatory capacity of the liver DC from IFN-γ TgM in allogenic mixed leukocyte reaction was significantly lower than that of the liver DC from control mouse. The endocytosis capacity was significantly lower in liver DC from IFN-γ TgM than in that from the control mouse. Most importantly, liver DC from IFN-γ TgM were unable to induce antigen-specific proliferation. The impaired function of liver DC from these mice may be attributable to increased production or induction of suppressor cytokines such as interleukin-10 and nitric oxide. Defective capacity of liver DC from mouse with chronic hepatitis (IFN-γ TgM) may be related to impaired magnitude of specific immune response in the liver.
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Document Type: Research Article
Affiliations: Department of Experimental Pathology, Cancer Institute, Japanese Foundation for Cancer Research, Toshima-ku, Tokyo 170-8455, Japan
Publication date: January 1, 2002
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- The International Journal of Molecular Medicine is a monthly, peer-reviewed journal devoted to the publication of high quality studies related to the molecular mechanisms of human disease. The journal welcomes research on all aspects of molecular and clinical research, ranging from biochemistry to immunology, pathology, genetics, human genomics, microbiology, molecular pathogenesis, molecular cardiology, molecular surgery and molecular psychology.
The International Journal of Molecular Medicine aims to provide an insight for researchers within the community in regard to developing molecular tools and identifying molecular targets for the diagnosis and treatment of a diverse number of human diseases.
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