Table 2.

Activity of spleen cells against the tumour cells (Winn assay^a)

Splenocytesb	None	Normal mice	Mice bearing 30 mm tumours	Mice bearing 5 mm tumours	Mice treated by LEFCTc	Mice treated by LEFCT-EC-BCNUc
% survivald
(12 mice in each group)	0	0	41	100	91	100

^aCT-26 cells (10⁵) were mixed in a proportion of 1 : 100 with splenocytes (10⁷) from different groups of mice, and injected to normal mice.

^bSource of splenocytes

^cSplenocytes were removed 1 month after treatments.

^dSurvival was determined 120 days after tumour/splenocytes inoculation.