Synthesis, radiosynthesis and in vivo preliminary evaluation of [11C]LBT-999, a selective radioligand for the visualisation of the dopamine transporter with PET
作者:Frédéric Dollé、Patrick Emond、Sylvie Mavel、Stéphane Demphel、Françoise Hinnen、Zoïa Mincheva、Wadad Saba、Heric Valette、Sylvie Chalon、Christer Halldin、Julie Helfenbein、Joël Legaillard、Jean-Claude Madelmont、Jean-Bernard Deloye、Michel Bottlaender、Denis Guilloteau
DOI:10.1016/j.bmc.2005.09.035
日期:2006.2
LBT-999 (8-((E)-4-fluoro-but-2-enyl)-3beta-p-tolyl-8-aza-bicyclo[3.2.1]octane-2beta-carbo xylic acid methyl ester), a cocaine derivative belonging to a new generation of highly selective dopamine transporter (DAT) ligands, and its corresponding carboxylic acid derivative, the latter used as precursor for labelling both with tritium and the positron-emitter carbon-11 (half-life: 20.38 min), were synthesized
LBT-999(8-(((E)-4-fluoro-but-2-enyl)-3beta-p-tolyl-8-aza-bicyclo [3.2.1] octane-2beta-carboxyly acid acid ester),a属于新一代高选择性多巴胺转运蛋白(DAT)配体的可卡因衍生物及其相应的羧酸衍生物,后者用作precursor和正电子发射体碳11标记的前体(半衰期:20.38分钟)由(R)-可卡因合成。从[(3)H]甲基碘制备[(3)H] LBT-999(放射化学纯度> 99%,比放射性为3.1 TBq / mmol),可进行体外药理学评估(K(D):9 nM对于DAT和IC(50)> 1000 nM(对于SERT和NET)。常规生产批次为4.5-9。使用有效的甲基化试剂[( 11)C]三氟甲磺酸甲酯。[(11)C] LBT-999的体内初步药理学评估,同时使用大鼠中的生物分布和猴