Covalent Modification of Phosphatidylethanolamine by Benzyl Isothiocyanate and the Resultant Generation of Ethanolamine Adduct as Its Metabolite
作者:Toshiyuki Nakamura、Miho Hirakawa、Yoshimasa Nakamura、Akari Ishisaka、Noritoshi Kitamoto、Akira Murakami、Yoji Kato
DOI:10.1021/acs.chemrestox.8b00331
日期:2019.4.15
Benzyl isothiocyanate (BITC), a dietary isothiocyanate (ITC) derived from cruciferous vegetables, has anticancer properties. It is believed that the ITC moiety (-N═C═S) that reacts predominantly with thiol compounds plays a central role in triggering the activities resulting from these properties. Recent studies have demonstrated that ITCs also covalently modify amino moieties in a protein. In this
十字花科蔬菜中的膳食异硫氰酸苄酯(ITC)是异硫氰酸苄酯(BITC),具有抗癌特性。据信主要与硫醇化合物反应的ITC部分(-N═C═S)在触发由这些性质引起的活性中起着中心作用。最近的研究表明,ITC还可以共价修饰蛋白质中的氨基部分。在这项研究中,我们研究了BITC与细胞膜或脂蛋白颗粒中的氨基磷脂,磷脂酰乙醇胺(PE)之间的化学反应。为了检测BITC修饰的PE,使用磷脂酶D裂解PE中的乙醇胺(EA)和磷脂酸之间的键以形成BITC-EA加合物,然后对其进行测量。即使仅使用几微摩尔的BITC处理,也可以从BITC处理的单层脂质体和低密度脂蛋白中检测到BITC-EA,这表明BITC不仅可以与蛋白质的巯基/氨基反应,还可以与蛋白质的氨基部分反应。氨基磷脂。此外,在将脂质体中包含的BITC-PE掺入培养的细胞中或将BITC直接暴露于细胞后,游离BITC-EA以时间依赖性方式被排泄并积存在培养基中。这