Prodrugs of adenosine A2A receptor agonists were developed that are activated by ecto-5′-nucleotidase (ecto-5′-NT, CD73). Because ecto-5′-NT is upregulated in inflamed tissue, the A2A agonists are expected to be released from their prodrug form at the sites of inflammation. 2-(Ar)alkyl-substituted AMP derivatives were synthesized and investigated. Certain 2-substituted AMP derivatives, including 2-hexylthio-AMP
开发了
腺苷A 2A受体激动剂的前药,它们被
ECto-5'-核苷酸酶(
ECto-5'-NT,CD73)激活。由于
ECto-5'-NT在发炎的组织中上调,因此A 2A激动剂有望在炎症部位从其前药形式释放出来。合成并研究了2-(Ar)烷基取代的
AMP衍
生物。某些2-取代的
AMP衍
生物,包括2-己基
硫基-
AMP,2-环戊基
硫基-
AMP,2-环己基甲
硫基-
AMP和2-环己基乙
硫基-
AMP被
ECto-5'-NT接受为底物,并易于转化为相应的2取代的
腺苷衍
生物。2-环己基乙
硫基取代是
ECto-5'-NT和
腺苷A 2A的良好折衷方案受体。相应的
AMP衍
生物(12g)是与
AMP本身相似的良好底物,而所得的
腺苷衍
生物(11g)是相对有效的A 2A激动剂(放射
配体与大鼠脑纹状体膜的结合力:K i = 372 nM;抑制抗-在小鼠C
D4 +细胞中CD3 /抗CD28诱导的IFN-γ释放:
EC 50 = 50 nM