The hydrolytic susceptibility of prochelator BSIH in aqueous solutions.

The hydrolytic susceptibility of prochelator BSIH in aqueous solutions.
复制标题

前螯合剂 BSIH 在水溶液中的水解敏感性。

DOI:
10.1016/j.bmcl.2017.07.019
复制
发表时间:
2017
影响因子:
2.7
通讯作者:
Franz,KatherineJ
Franz,KatherineJ
中科院分区:
医学4区
文献类型:
--
作者:
Wang,Qin;Franz,KatherineJ

文献摘要

相似文献

前螯合剂BSIH((E)-N '-(2-(4,4,5,5-四甲基-1,3,2-二氧杂硼杂环戊烷-2-基)亚苄基)异烟酰肼)含有硼酸酯基团,其阻止金属配位,直到与过氧化物反应释放铁螯合剂SIH((E)-N'-(2-羟基亚苄基)异烟酰肼)。BSIH存在于水性缓冲液和细胞培养基中,与其水解产物异烟肼和(2-甲酰基苯基)硼酸(FBA)平衡。这些物质的相对浓度限制了可用于靶向铁螯合的完整SIH的产率。虽然水解片段对视网膜色素上皮细胞是无毒的,但这些结果表明,对BSIH进行修饰,改善其水解稳定性,同时保持其低的固有细胞毒性,对于产生更有效的前螯合剂以保护免受细胞氧化损伤是理想的。
The prochelator BSIH ((E)-N′-(2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzylidene)isonicotinohydrazide) contains a boronate group that prevents metal coordination until reaction with peroxide releases the iron chelator SIH ((E)-N′-(2-hydroxybenzylidene)isonicotinohydrazide). BSIH exists in aqueous buffer and cell culture media in equilibrium with its hydrolysis products isoniazid and (2-formylphenyl)boronic acid (FBA). The relative concentrations of these species limit the yield of intact SIH available for targeted iron chelation. While the hydrolysis fragments are nontoxic to retinal pigment epithelial cells, these results suggest that modifications to BSIH that improve its hydrolytic stability yet maintain its low inherent cytotoxicity are desirable for creating more efficient prochelators for protection against cellular oxidative damage.