Synthesis and in vitro evaluation of 2-[11C]methoxyestradiol-3,17β-O,O-bissulfamate for in vivo studies of angiogenesis
作者:Choong Mo Kang、Yearn Seong Choe、Kyung-Ho Jung、Joon Young Choi、Kyung-Han Lee、Byung-Tae Kim
DOI:10.1002/jlcr.1930
日期:2011.11
In the present study, 2-methoxyestradiol-3,17β-O,O-bissulfamate (1), a known angiogenesis inhibitor, was prepared in a radiolabeled form by 11C-methylation of 2-hydroxyestradiol-3,17β-O,O-bis(N-trityl)sulfamate (6) followed by detritylation. Synthesis of precursor 6 required a rather long step because of the presence of two sulfamoyl groups. The decay-corrected radiochemical yield of [11C]1 was 19 ± 2% based on [11C]CH3I, and the specific activity was 34–39 GBq/µmol. Although 1 is known to significantly inhibit the proliferation of human umbilical vascular endothelial cells (HUVECs), its radiolabeled form, [11C]1 was not avidly taken up by HUVECs, and the uptake increased slightly in a time-dependent manner (156% at 60 min relative to a value of 100% at 5 min). These results suggest that further studies are warranted to determine the molecular target for [11C]1. Copyright © 2011 John Wiley & Sons, Ltd.
在本研究中,通过11C甲基化2-羟基雌二醇-3,17β-O,O-双(N-三苯基)磺酰胺(6)并随后脱三苯基化,制备了已知的血管生成抑制剂2-甲氧基雌二醇-3,17β-O,O-双磺酰胺(1)的放射性标记形式。由于存在两个磺酰胺基团,前体6的合成需要较长的步骤。基于[11C]CH3I的衰变校正放射化学产率为19±2%,比活度为34-39 GBq/µmol。虽然已知1显著抑制人脐静脉内皮细胞(HUVECs)的增殖,但其放射性标记形式[11C]1并未被HUVECs大量摄取,摄取量随时间轻微增加(60分钟时相对于5分钟的100%为156%)。这些结果表明有必要进一步研究以确定[11C]1的分子靶标。版权所有 © 2011 John Wiley & Sons, Ltd.