PMID: 9538178May 9, 1998Paper

Cytotoxic activity of normal mouse serum on mouse tumor cells in vitro

Oncology Reports
Y TanigakiH Tanaka

Abstract

Cytotoxic effects of normal mouse serum on mouse tumor cells were investigated in vitro. When FE melanoma cells of C57BL/6 mouse origin, were cultured in medium containing 1% fetal calf serum (FCS) and 10-30% C57BL/6 mouse serum, number of viable FE cells markedly decreased after a little increase in their number, indicating cell death of FE cells in culture with mouse serum. Phase-contrast microscopic examination showed appearance of fatty degeneration in FE cells after 24 h, and an increase in cell death after 48 h. Electron microscopic examination, and agarose gel electrophoresis of DNA at 72 h of culture showed that their cell death occurred as necrosis. This cytotoxic effect of mouse serum was also found in culture of combinations of C57BL/6 mouse serum and C57BL/6 mouse melanoma cells (G6 cells), and BALB/c mouse serum and various BALB/c mouse tumor cells (G-5 and G-1 liver tumor cells, and Colon 26 cells). Furthermore, sera of BALB/c and B10D2 mice also showed the cytotoxic effect on FE cells. The cytotoxic effect of mouse serum was not ascribed to complement activity because all mouse sera were treated at 56 degrees C for 30 min before use, and this heat treatment completely abolished complement activity, and because se...Continue Reading

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