Details

Autor(en) / Beteiligte

• SUN, B

Titel

Synthesis, radiolabeling and animal studies of [^131I]MPPI： A 5-HT1A imaging agent

Ist Teil von

• Nuclear science and techniques, 2006-02, Vol.17 (1), p.43-47

Ort / Verlag

Jiangsu Institute of Nuclear Medicine,Wuxi 214063,China

Erscheinungsjahr

2006

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• The synthesis and biological evaluation of serotonin （5-HT1A） imaging agent [^131I]- 4-iodo-N-{2-[4-（2-methoxyphenyl）-piperazin-l-yl]-ethyl}-N-pridin-2-yl-benzamide （[^131I]MPPI） are reported. The chemical structure of aimed compound and intermediates were confirmed by IR, ^1HNMR, and MS. Radiochemical purity was above 99% determined by TLC. Biodistribution of [^131I]MPPI in rats displayed high uptake in hippocampus and low uptake in cerebellum. The ratio of the uptake of [^131I]MPPI in hippocampus to that in cerebellum was 2.90 at 30 rain post injection. The radioactivity in thyroid was 0.069 and 0.128% ID/g organ at 5 min and 120 rain, respectively, and it was increased with time, which suggests that in vivo deiodination may be the major route of metabolism. Ex vivo autoradiography of brain section displayed significant decrease of radioactivity in hippocampus when pretreated with 8-OH-DPAT, a selective 5HT1A agonist, compared with control. These findings strongly suggested that ^131I-MPPI could be used as an in vivo marker for studies of pharmacology of the 5-HT1A receptor system in animals.