Human tumor specific cytotoxic T lymphocytes (CTL) were expanded on fo
rmalin-fixed autologous target tumor cells derived from glioblastoma m
ultiforme. Growth response of the CTL restimulated with the fixed targ
et cells was larger than those with live target cells. The results sug
gest that formalin-fixed tumor cells will be stable sources of tumor a
ntigen for efficient autologous CTL expansion and be useful for adopti
ve immunotherapy of tumors.