○Kenichi Tanaka^1,2, Hitoshi Makabe^1,2, Michiko Narita², Yukari Suda^1,2, Yusuke Hamada^1,2, Naoko Kuzumaki^1,2, Minoru Narita^1,2 (1. Dept. Pharmacol., Hoshi Univ., Tokyo, Japan, 2. Div. Pathophysiol., Natl. Cancer Ctr. Res. Inst., Tokyo, Japan)