RRC ID 47
著者 Kawashima M, Ide M, Nakanishi M, Kuwamura M, Kumagai D, Yamate J.
タイトル Immunophenotypical changes of neoplastic cells and tumor-associated macrophages in a rat dendritic cell sarcoma-derived transplantable tumor line (KB-D8).
ジャーナル Virchows Arch
Abstract Basically, dendritic cell-derived sarcomas are characterized by expression of major histocompatibility complex class-II molecules, but the biological properties of the tumor cells remain to be elucidated. Recently, we established a novel transplantable cell line (KB-D8) from a dendritic cell sarcoma found in an F344 rat. In the present study, we investigated immunophenotypical changes of KB-D8 tumor cells and tumor-associated macrophages (TAMs) appearing in relation to tumor development in syngeneic F344 rats. A number of neoplastic cells in 0.5-cm-diameter KB-D8 tumors showed immunoreactions to OX6 (specific for rat antigen-presenting cells), ED1 (for rat exudate macrophages), and ED2 (for rat resident macrophages), and 72% and 11% of the OX6+ cells were double-immunostained with ED1 and ED2, respectively. Interestingly, the immunoreactions to these antibodies were gradually reduced with increasing size of KB-D8 tumors of 1-, 2-, and 3-cm diameter. These findings indicated that immunophenotypes of dendritic cell-derived sarcomas may be changeable depending on microenvironmental conditions in vivo. Many TAMs seen outside KB-D8 tumors reacted to OX6, ED1, and ED2; the numbers of TAMs immunopositive for these antibodies also decreased as the tumor grew. Similarly, the earlier temporary increase and subsequent gradual decrease in ED2+ and OX6+ cell numbers were observed in the spleen and liver of KB-D8-bearing rats. The reverse-transcription polymerase chain reaction showed mRNA expressions of granulocyte/macrophage-colony stimulating factor, monocyte-chemoattractant protein-1, and osteopontin in KB-D8 tumor tissues. Although the functional roles (biphasic roles: suppressing or promoting) of these factors should be investigated further in relation to tumor development, the factors might be partially responsible for the TAM reactions. KB-D8 would be a useful experimental model to investigate the biological characteristics of dendritic cell sarcomas and tumor immunology in the host.
巻・号 442(2)
ページ 141-50
公開日 2003-2-1
DOI 10.1007/s00428-002-0716-8
PMID 12596065
MeSH Animals Antibodies, Monoclonal Cell Count Chemokine CCL2 / genetics Chemokine CCL2 / metabolism DNA Primers / chemistry Dendritic Cells / immunology* Dendritic Cells / pathology Granulocyte-Macrophage Colony-Stimulating Factor / genetics Granulocyte-Macrophage Colony-Stimulating Factor / metabolism Histocompatibility Antigens Class II / genetics Histocompatibility Antigens Class II / immunology Immunoenzyme Techniques Immunophenotyping / methods Macrophages / immunology* Macrophages / metabolism Macrophages / pathology Male Osteopontin RNA, Messenger / metabolism RNA, Neoplasm / analysis Rats Rats, Inbred F344 Reverse Transcriptase Polymerase Chain Reaction Sarcoma, Experimental / immunology* Sarcoma, Experimental / metabolism Sarcoma, Experimental / pathology Sialoglycoproteins / genetics Sialoglycoproteins / metabolism Tumor Cells, Cultured
IF 2.906
引用数 6
WOS 分野 PATHOLOGY
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