In order to enable the study of the intracellular second messenger d-myo-inositol 1,4,5-trisphosphate (InsP3) and its receptors (InsP3Rs), it has been desirable to develop protected derivatives of InsP3 that are able to enter the cell, upon extracellular application. The subsequent removal of the lipophilic protecting groups, by intracellular enzymes, releases InsP3 and leads to the activation of InsP3Rs. Two syntheses of d-myo-inositol 1,4,5-trisphosphate hexakis(butyryloxymethyl) ester (d-InsP3/BM) and one of l-InsP3/BM are reported. It is demonstrated that extracellular application of the d-enantiomer results in Ca2+ release, which is thought to occur via InsP3Rs. Application of the l-enantiomer resulted in little Ca2+ release.
为了能够研究细胞内的第二信使 d-肌醇-1,4,5-
三磷酸腺苷(InsP3)及其受体(InsP3Rs),人们希望开发出受保护的 InsP3 衍
生物,这种衍
生物能够在细胞外应用时进入细胞。随后,细胞内的酶会去除亲脂性保护基团,释放出 InsP3,从而激活 InsP3R。报告了两种 d-肌醇 1,4,5-
三磷酸己二异(丁酰氧基甲基)酯(d-InsP3/BM)和一种 l-InsP3/BM的合成。研究表明,细胞外施用 d-对映体会导致 Ca2+ 释放,这被认为是通过 InsP3Rs 发生的。应用 l-对映体则几乎没有 Ca2+ 释放。