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[Migration activity of peritoneal exudate cells in Syrian hamsters in normal conditions and during suppression of their natural resistance to tumors].

Migration activity (MA) of peritoneal exudate cells (PEC) was studied in Syrian hamsters in normalcy and under intraperitoneal injection into the animals of inactivated normal and tumor cells including those capable of inhibiting the natural animals' resistance to tumor. No significant individual differences were found in MA of PEC of intact hamsters. MA of PEC of hamsters treated with inactivated normal or spontaneously transformed in vitro cells of hamster embryo did not differ from the means of MA in the control. MA of PEC of hamsters treated with inactivated tumor cells was found to be appreciably enhanced. The ability of inactivated tumor cells to induce the enhancement of MA of PEC correlates with their ability to suppress natural tumor resistance.