作者:Vanessa Ahmed、Yong Liu、Cassandra Silvestro、Scott D. Taylor
DOI:10.1016/j.bmc.2006.08.033
日期:2006.12
Steroid sulfatase (STS) catalyzes the hydrolysis of steroidal sulfates such as estrone sulfate (ES1) to the corresponding steroids and inorganic sulfate. STS is considered to be a potential target for the development of therapeutics for the treatment of steroid-dependent cancers. Two steroidal and two coumarin- and chromenone-based boronic acids were synthesized and examined as inhibitors of purified
类固醇硫酸酯酶(STS)催化类固醇硫酸盐(如硫酸雌酮(ES1))水解为相应的类固醇和无机硫酸盐。STS被认为是开发治疗类固醇依赖性癌症的疗法的潜在目标。合成了两种甾体和两种基于香豆素和色农酮的硼酸,并作为纯化的STS抑制剂进行了检测。硫酸雌酮的硼酸类似物在3-位取代硫酸根基团带有硼酸部分,是一种具有良好竞争性的STS抑制剂,在pH 7.0时的K(i)为2.8microM,在pH 8.8时的K(i)为6.8microM。该抑制是可逆的,并且未观察到与慢结合抑制剂的机理相对应的动力学性质。在3位带有硼酸基团,在17位带有苄基的雌二醇衍生物是一种有效的可逆,非竞争性STS抑制剂,K(i)为250nM。但是,其3-OH类似物(一种已知的STS抑制剂)对STS表现出几乎相同的亲和力,并且也以非竞争性方式结合。建议这些化合物倾向于结合在靠近活性位点入口的疏水通道中。香豆素和色酮硼酸是适度的STS抑制剂