Abstract:
:Because renal-cell carcinoma (RCC) is considered relatively resistant to radio- and chemotherapy, RCC patients may benefit from new treatment modalities, e.g. immunotherapy. In vitro and in vivo studies suggest that combinations of cytokines such as interferon gamma or interferon alpha (IFN-gamma, IFN-alpha) and tumor necrosis factor alpha (TNF-alpha) may act synergistically. In this study we tested whether a monoclonal antibody (MAb) G250, reactive with a RCC-associated antigen, showed anti-tumor effects in vivo in nude mice with established s.c. human RCC xenografts, and also whether this MAb could enhance the anti-tumor effect of combinations of IFNs and TNF-alpha. Treatment with combinations of IFN-alpha/TNF-alpha or IFN-gamma/TNF-alpha, or with MAb G250 alone, resulted in a significant inhibition of tumor growth. Treatment with MAb G250, in combination with IFN-gamma/TNF-alpha, did not result in an improve anti-tumor effect as compared to that of either treatment alone. In contrast, MAb G250 combined with IFN-alpha/TNF-alpha resulted in a significantly enhanced anti-tumor response. In one experiment, 3 out of 10 mice showed complete tumor regression, with no recurrence after 90 days. Large numbers of infiltrating macrophages were found surrounding viable and necrotic tumor tissue after treatment with G250 combined with IFN-alpha/TNF-alpha. These results suggest that combination therapy, consisting of IFN-alpha, TNF-alpha and MAbs, may have therapeutic value in the treatment of RCC.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
van Dijk J,Uemura H,Beniers AJ,Peelen WP,Zegveld ST,Fleuren GJ,Warnaar SO,Oosterwijk Edoi
10.1002/ijc.2910560220subject
Has Abstractpub_date
1994-01-15 00:00:00pages
262-8issue
2eissn
0020-7136issn
1097-0215journal_volume
56pub_type
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