A novel human tumor necrosis factor alfa mutein, F4614, inhibits in vitro and in vivo growth of murine and human hepatoma: implication for immunotherapy of human hepatocellular carcinoma
Abstract
Although treatment for hepatocellular carcinoma (HCC) has recently improved, most patients still relapse and die from this disease. The development of new therapeutic and preventive strategies for HCC is, therefore, required. A novel mutant protein (mutein) of human tumor necrosis factor alfa (TNF-alpha mutein F4614, 1SSSRGDSD... 29V ... 155L) was developed to decrease several adverse effects of TNF-alpha. F4614 is known to lack hypotensive effects of human TNF-alpha without losing its anti-tumor effect in mice transplanted with Meth-A sarcoma. Our study investigated the anti-tumor effects of F4614 against hepatoma cells in vitro and in vivo. F4614 significantly inhibited growth of all four tumor cells in vitro. A murine hepatoma cell line, MH134, when incubated in the presence of F4614, exhibited upregulation of surface major histocompatibility complex (MHC) class-I, intercellular adhesion molecule-1 (ICAM-1) and B7-1 molecules, and a decreased proportion of cells in the G2/M phase of the cell cycle. In addition, F4614 induced apoptosis in a significant number of MH134 cells. TNF-alpha and F4614 (5 microg/mouse daily for 5 days) showed similar anti-tumor activities in syngeneic MH134-bearing mice and heterogeneic PLC/PRF/5-bea...Continue Reading
References
Recombinant human tumor necrosis factor-alpha: thrombus formation is a cause of anti-tumor activity.
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