Failure to Reject an Allografted Tumor after Elimination of Macrophages in Mice
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- USHIO Yumiko
- Department of Cell Biology, Osaka Bioscience Institute
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- YAMAMOTO Naoki
- Department of Cell Biology, Osaka Bioscience Institute
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- SANCHEZ-BUENO Antonio
- Department of Cell Biology, Osaka Bioscience Institute
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- YOSHIDA Ryotaro
- Department of Cell Biology, Osaka Bioscience Institute
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After an i.p. transplantation of an allogeneic tumor (Meth A) to C57BL/6 mice, a macrophage (MΦ)-rich, non-T, non-NK cell population is induced as the major infiltrate and cytotoxic cells. We here evaluated the role of the MΦs in the rejection of allografted Meth A cells and characterized the MΦs in comparison with other well-known MΦs. At all time intervals after transplantation, the highest cytotoxic activities against Meth A tumor were obtained with the MΦ-rich population. In addition, the lymphocyte-rich population had a significant but low cytotoxic activity, whereas two other population types, granulocytes and large granular cells, were inactive. When the MΦ-rich or the T cell-depleted MΦ-rich population was i.p. transplanted simultaneously with Meth A cells into untreated C57BL/6 mice, the tumor cells were rejected without growth. After specific elimination of MΦs by in vivo application of dichloromethylene diphosphonate-containing liposomes, the cytotoxic activity against Meth A cells was hardly induced at the transplantation site of Meth A cells and the allografted Meth A tumor continued to grow, indicating that a type of MΦ is the effector cell essential for the rejection. In contrast to other well-known MΦs, the cytotoxic activity against Meth A cells was cell-to-cell contact dependent and soluble factor (e.g., NO and TNF-α) independent. Moreover, the cytotoxic activity of the MΦs (H-2b) against 51Cr-labeled Meth A (H-2d) cells was inhibited by the addition of unlabeled H-2d, but not H-2a, H-2k or H-2b, lymphoblasts as well as Meth A cells, implying the specific interaction of the MΦs with H-2d cells.
収録刊行物
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- Microbiology and immunology
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Microbiology and immunology 40 (7), 489-498, 1996-07-20
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詳細情報 詳細情報について
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- CRID
- 1573668924045452800
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- NII論文ID
- 10004893312
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- NII書誌ID
- AA00738350
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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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