*Moeka Ohno^1,2, Shuji Wakatsuki², Keizo Takao³, Toshiyuki Araki^1,2 (1. Dept. Biotech & Life Sci., Grad Sch of Eng., Univ. of Agric & Eng, Tokyo, Japan, 2. Natl. Inst. Neurosci., NCNP, Tokyo, Japan, 3. Fac. Med., Univ. of Toyama)