Imaging of adenosine A1 receptors in the human brain by positron emission tomography with [11C]MPDX.
We report the first clinical PET study using [1-methyl-11C]8-dicyclopropylmethyl-1-methyl-3-propylxanthine ([11C]MPDX) for imaging adenosine A1 receptors in the human brain. The binding of [11C]MPDX evaluated quantitatively as the distribution volume by a graphical analysis was high in the striatum and thalamus, and low in the cerebellum. The distribution pattern of [11C]MPDX was coincident with that of adenosine A1 receptors in vitro reported previously, and was different from those of blood flow and [18F]FDG. The [11C]MPDX PET has the potential for mapping adenosine A1 receptors in the human brain.
Positron Medical Center, Tokyo Metropolitan Institute of Gerontology, Japan. GZL13162@nifty.ne.jp
Nobuyoshi
N
Fukumitsu
Kenji
K
Ishii
Yuichi
Y
Kimura
Keiichi
K
Oda
Toru
T
Sasaki
Yutaka
Y
Mori
Kiichi
K
Ishiwata
D001921:Brain / Q000000981:diagnostic imaging* / Q000378:metabolism*; D001931:Brain Mapping / Q000379:methods; D006801:Humans; D007090:Image Interpretation, Computer-Assisted; D008297:Male; D008657:Metabolic Clearance Rate; D008875:Middle Aged; D019275:Radiopharmaceuticals / Q000493:pharmacokinetics; D043682:Receptor, Adenosine A1 / Q000378:metabolism*; D014018:Tissue Distribution; D014055:Tomography, Emission-Computed / Q000379:methods*; D014970:Xanthines / Q000493:pharmacokinetics*
C451639:1-methyl-8-dicyclopropylmethyl-1-methyl-3-propylxanthine; D019275:Radiopharmaceuticals; D043682:Receptor, Adenosine A1; D014970:Xanthines