@article{oai:repo.qst.go.jp:00045797, author = {Arakawa, Ryosuke and Ito, Hiroshi and Okumura, Masaki and Takano, Akihiro and Takahashi, Hidehiko and Takano, Harumasa and Okubo, Yoshiro and Suhara, Tetsuya and 荒川 亮介 and 伊藤 浩 and 奥村 正紀 and 高野 晶寛 and 高橋 英彦 and 高野 晴成 and 大久保 善朗 and 須原 哲也}, issue = {4}, journal = {European Archives of Psychiatry and Clinical Neuroscience}, month = {Jun}, note = {Olanzapine is described as a multi-acting receptor-targeted antipsychotic agent. Although regional differences of dopamine D2 receptor occupancy, i.e., limbic selectivity, were reported for olanzapine, contradictory results were also reported. We measured dopamine D2 receptor occupancy of olanzapine in extrastriatal regions in patients with schizophrenia using positron-emission tomography with [11C]FLB457 and the plasma concentrations of olanzapine. Ten patients with schizophrenia taking 5–20 mg/day of olanzapine participated. Dopamine D2 receptor occupancy in the temporal cortex ranged from 61.1 to 85.8%, and plasma concentration was from 12.7 to 115.4 ng/ml. The ED50 value was 3.4 mg/day for dose and 10.5 ng/ml for plasma concentration. The ED50 values obtained in this study were quite similar to those previously reported in the striatum. In conclusion, although the subjects and methods were different from previous striatal occupancy studies, these results suggest that limbic occupancy by olanzapine may not be so different from that in the striatum.}, pages = {345--350}, title = {Extrastriatal dopamine D2 receptor occupancy in olanzapine-treated patients with schizophrenia}, volume = {260}, year = {2010} }