Linked Life Data

12596065

Source:http://linkedlifedata.com/resource/pubmed/id/12596065

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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2003-2-21
pubmed:abstractText
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.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0945-6317
pubmed:author
pubmed:issnType
Print
pubmed:volume
442
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
141-50
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed-meshheading:12596065-Animals, pubmed-meshheading:12596065-Antibodies, Monoclonal, pubmed-meshheading:12596065-Cell Count, pubmed-meshheading:12596065-Chemokine CCL2, pubmed-meshheading:12596065-DNA Primers, pubmed-meshheading:12596065-Dendritic Cells, pubmed-meshheading:12596065-Granulocyte-Macrophage Colony-Stimulating Factor, pubmed-meshheading:12596065-Histocompatibility Antigens Class II, pubmed-meshheading:12596065-Immunoenzyme Techniques, pubmed-meshheading:12596065-Immunophenotyping, pubmed-meshheading:12596065-Macrophages, pubmed-meshheading:12596065-Male, pubmed-meshheading:12596065-Osteopontin, pubmed-meshheading:12596065-RNA, Messenger, pubmed-meshheading:12596065-RNA, Neoplasm, pubmed-meshheading:12596065-Rats, pubmed-meshheading:12596065-Rats, Inbred F344, pubmed-meshheading:12596065-Reverse Transcriptase Polymerase Chain Reaction, pubmed-meshheading:12596065-Sarcoma, Experimental, pubmed-meshheading:12596065-Sialoglycoproteins, pubmed-meshheading:12596065-Tumor Cells, Cultured
pubmed:year
2003
pubmed:articleTitle
Immunophenotypical changes of neoplastic cells and tumor-associated macrophages in a rat dendritic cell sarcoma-derived transplantable tumor line (KB-D8).
pubmed:affiliation
Laboratory of Veterinary Pathology, Graduate School of Agriculture and Biological Sciences, Osaka Prefecture University, Gakuencho 1-1, Sakai, Osaka 599-8531, Japan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't