人源蛋白酪氨酸磷酸酶(PTP1B)抑制剂的高通量筛选

本研究拟建立体外人源蛋白酪氨酸磷酸酶(PTP1B)抑制剂高通量筛选模型,用于PTP1B抑制剂的发现。利用大肠杆菌重组表达PTP1B,以对硝基苯磷酸二钠(PNPP)为特异性的底物,建立了基于酶反应速率的384孔微板为载体的PTP1B抑制剂高通量筛选模型(Z'=0.78)。选择24 240个样品进行筛选,对抑制率大于70%的80个样品作为活性样品进行复筛,最终确定6个具有较强的抑制活性的化合物J5753、J10550、J10551、J10583、J10585和J11101,其IC50值分别为21.58、18.39、15.37、11.92、37.27和36.61μg·mL-1。结果表明,所建立的PTP1B抑制剂高通量筛选模型具有快速、灵敏、稳定、重复性好的特点。

High-throughput screening of human soluble protein tyrosine phosphatase 1B inhibitors

To screen potential human soluble protein tyrosine phosphatase 1B (PTP1B) inhibitors, a high-throughput screening (HTS) model in 384-well microplate with total volume of 50 microL was established. Recombinant PTP1B was cloned and expressed in E. coli. with its specific substrate 4-nitrophenyl phosphate disodium salt hexahydrate (PNPP). The HTS model was based on enzyme reaction rate with enhanced sensitivity and specificity (Z' = 0.78). A total of 24,240 samples were screened, among them 80 samples with inhibition greater than 70% were selected for further rescreening. Finally, six compounds with high inhibitory activity were identified, whose IC50 values were 21.58, 18.39, 15.37, 11.92, 37.27, and 36.61 microg x mL(-1), separately. The results indicated that the method was stable, sensitive, reproducible and also suitable for high-throughput screening.