尚琨, 张鹏, 周璐, et al. Screening of Pim kinase inhibitors by the establishment of high-throughput ELISA system[J]. China Oncology, 2013, 23(4): 260-266. DOI: 10.3969/j.issn.1007-3969.2013.04.004.
Background and purpose: Pim family is the proto-oncogene that exhibits serine/threonine kinase activity
containing Pim-1
Pim-2
Pim-3. Pim family has potent anti-apoptotic capacity
ultimately promoting tumor cells survival. This study aimed to establish a high-throughput system to screen the anti-cancer drugs targeting Pim kinase by ELISA. Methods: The stemonamide synthetic intermediates were synthesized using a radical cascade. The expression of Pim kinase proteins and Bad proteins were purified by bacterial system. A high-throughput ELISA screening was performed for in vitro Pim kinase assay. Results: Treatment with 0.01 mmol/L of IPTG for 2 hours at 37 ℃
the induction of Bad recombinant proteins was the maximum; Treatment with 0.02% of arabinose for 3 hours at 37 ℃
the induction of Pim-1
Pim-2
Pim-3 recombinant proteins was the maximum. ELISA results showed that the Pim kinase could phosphorylate Bad in a dose-dependent manner; we had found a low molecular weight compounds T-18
which could effective inhibit Pim kinase activity in vitro. Conclusion: We successfully established a screening system with Bad and Pim by ELISA. ELISA is a method for screening drug with high throughput
effect and sensitivity. Moreover
small molecule the compound T-18 that is screened by ELISA
can inhibit Pim kinase activities
ultimately reduce the amount of phosphorylated Bad and could induce apoptosis.