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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1995-4-21
pubmed:abstractText
Models for experimental metastasis were established to investigate the influence of rmTNF on tumor-colony formation in the liver. Highly metastatic lymphoma tumor cells were either injected i.v. or inoculated s.c. to form spontaneous metastases. In both systems, administration of rmTNF to the animals led to significant enhancement of the number of liver metastases in comparison with control groups. The number of metastatic tumor-cell colonies at an early stage of metastasis was increased, as well as the number of surface metastases in a late stage. Consequently, TNF-treated animals revealed a higher mortality. The optimal time for TNF to exert this metastasis-enhancing effect was found to be 7 days after tumor inoculation. In vitro adhesion of the lymphoma tumor cells to a mouse endothelioma cell line was strongly inhibited by monoclonal antibodies interfering with the interaction of VCAM-1 with VLA-4. These results support and extend earlier results with a fibrosarcoma lung colonization model. In addition, they show that stimulation of the immune system in tumor-bearing hosts activates tumor-promoting pathways, in addition to having possible beneficial effects.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0020-7136
pubmed:author
pubmed:issnType
Print
pubmed:day
16
pubmed:volume
60
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
867-71
pubmed:dateRevised
2007-7-24
pubmed:meshHeading
pubmed:year
1995
pubmed:articleTitle
Promotion of experimental liver metastasis by tumor necrosis factor.
pubmed:affiliation
German Cancer Research Centre, Division of Cellular Immunology, Heidelberg.
pubmed:publicationType
Journal Article