Synthesis and Structural Characterization of the Trimeric Furoxan (= Furazan 2-Oxide) System, a New Potent Vasodilating Moiety
作者:Andrea M. Gasco、Clara Cena、Antonella Di Stilo、Giuseppe Ermondi、Claudio Medana、Alberto Gasco
DOI:10.1002/hlca.19960790706
日期:1996.10.30
series of terfuroxan (= terfurazan trioxide) derivatives 1a–h and 2a–j are reported (Schemes 1 and 2). Structural assignments were confirmed principally by mass and 13C- and 1H-NMR spectroscopy. The extent and the initial rate of NO release in the presence of thiol cofactor was evaluated for each derivative. Vasodilator effects of all the terfuroxan derivatives were evaluated on endothelium-denuded strips
<i>In Vitro</i> Metabolic Stability and <i>in Vivo</i> Biodistribution of 3-Methyl-4-furoxancarbaldehyde Using PET Imaging in Rats
作者:Adam B. Pippin、Zaira Hidayah Mohd Arshad、Ronald J. Voll、Jonathon A. Nye、Sussan Ghassabian、Craig M. Williams、Alessandra Mancini、Dennis C. Liotta、Maree T. Smith、Mark M. Goodman
DOI:10.1021/acsmedchemlett.5b00410
日期:2016.6.9
in rats. The furoxan ring was labeled with 13N to follow any nitric oxide release and the 3-methyl substituent was labeled with 11C to track the metabolite using PET imaging. The in vitro metabolic stability of PRG150 was assessed in rat liver microsomes and compared to in vivo metabolism of the synthesized radiotracers. PET images revealed a higher uptake of 13N over 11C radioactivity in the spinal
疼痛性糖尿病神经病变(PDN)是一种周围神经性疼痛,目前临床上可用的镇痛药很难治疗。最近的研究表明,神经细胞中一氧化氮 (NO) 的逐渐消耗可能是 PDN 病理学的原因。一氧化氮供体 3-甲基-4-呋喃甲醛 (PRG150) 已被证明可以在 PDN 大鼠模型中产生剂量依赖性镇痛作用。为了深入了解镇痛机制,开发了放射性标记 PRG150 的方法来评估大鼠体内的生物分布。呋喃环用13 N 标记以追踪一氧化氮的释放,3-甲基取代基用11 C 标记以使用 PET 成像追踪代谢物。在大鼠肝微粒体中评估 PRG150 的体外代谢稳定性,并与合成放射性示踪剂的体内代谢进行比较。PET 图像显示,脊髓中13 N放射性吸收量高于11 C 放射性吸收量。放射性吸收的差异可能表明,脊髓和体感神经系统其他组成部分中 NO 的释放可能是 PDN 大鼠模型中 PRG150 镇痛作用的原因。