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Evaluation of distribution of adenosine A2A receptors in normal human brain measured with [11C]TMSX PET
https://repo.qst.go.jp/records/44929
https://repo.qst.go.jp/records/44929483bb5b6-bdf7-483f-96bc-db55b6f7ea78
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2007-07-31 | |||||
| タイトル | ||||||
| タイトル | Evaluation of distribution of adenosine A2A receptors in normal human brain measured with [11C]TMSX PET | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Mishina, Masahiro
× Mishina, Masahiro× Ishiwata, Kiichi× Kimura, Yuichi× Naganawa, Mika× Oda, Keiichi× Kobayashi, Shirou× Katayama, Yasuo× Ishii, Kenji× 石渡 喜一× 木村 裕一× 長縄 美香× 織田 圭一× 石井 賢二 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Adenosine A2A receptor (A2AR) is thought to interact with dopamine D2 receptor. Selective A2AR antagonists have attracted attention as the treatment of Parkinson's disease. In this study, we investigated the distribution of the A2ARs in the living human brain using positron emission tomography (PET) and [7-methyl-11C]-(E)-8-(3,4,5-trimethoxystyryl)-1,3,7-trimethylxanthine ([11C]TMSX). We recruited five normal male subjects. A dynamic series of PET scans was performed for 60 min, and the arterial blood was sampled during the scan to measure radioactivity of the parent compound and labeled metabolites. Circular regions of interest of 10-mm diameter were placed in the PET images over the cerebellum, brainstem, thalamus, head of caudate nucleus, anterior and posterior putamen, frontal lobe, temporal lobe, parietal lobe, occipital lobe, and posterior cingulate gyrus for each subject. A two-tissue, three-compartment model was used to estimate K1, k2, k3, and k4 between metabolite-corrected plasma and tissue time activity of [11C]TMSX. The binding potential (BP) was the largest in the anterior (1.25) and posterior putamen (1.20), was next largest in the head of caudate nucleus (1.05) and thalamus (1.03), and was small in the cerebral cortex, especially frontal lobe (0.46). [11C]TMSX PET showed the largest BP in the striatum in which A2ARs were enriched as in postmortem and nonhuman studies reported, but that the binding of [11C]TMSX was relatively larger in the thalamus to compare with other mammals. To date, [11C]TMSX is the only promising PET ligand, which is available to clinical use for mapping the A2ARs in the living human brain. | |||||
| 書誌情報 |
Synapse 巻 61, 号 9, p. 778-784, 発行日 2007-06 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0887-4476 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1002/syn.20423 | |||||
