Modifying aroylhydrazone prochelators for hydrolytic stability and improved cytoprotection against oxidative stress
作者:Qin Wang、Katherine J. Franz
DOI:10.1016/j.bmc.2018.11.004
日期:2018.12
BSIH ((E)-N′-(2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzylidene)isonicotinohydrazide) is a prodrug version of the metal chelator SIH ((E)-N′-(2-hydroxybenzylidene)isonicotinohydrazide) in which a boronate group prevents metal chelation until reaction with hydrogen peroxide releases SIH, which is then available for sequestering iron(III) and inhibiting iron-catalyzed oxidative damage. While BSIH
BSIH(((E)-N '-(2-(4,4,5,5-tetramethyl-1,3,2-dioxaboroboro-2--2-yl)苄叉基)异烟肼)是金属螯合剂SIH((E)-N'-(2-羟基亚苄基)异二十二酰肼)中的硼酸酯基团防止金属螯合,直到与过氧化氢反应释放出SIH,然后可用于螯合铁(III)和抑制铁催化的氧化损伤。虽然BSIH已显示出在氧化应激条件下有条件地靶向细胞螯合铁的前景,但由于BSIH以其水解产物异烟肼和2-甲酰基苯基硼酸作为平衡混合物存在于细胞培养基中的事实限制了SIH的产量。在当前的研究中,评估了几种BSIH类似物的水解稳定性,与H 2 O 2的反应结果以及螯合剂到螯合剂的转化效率。值得注意的是,对甲氧基衍生物(p-OMe)BSIH((E)-N '-(5-甲氧基-2-(4,4,5,5-四甲基-1,3,2-二氧杂硼烷-2-基)亚苄基)异烟肼基)和间位- ,第-double取代的(MD)BSIH((ë)