Article

Pharmacologically inhibiting phosphoglycerate kinase 1 for glioma with NG52

Authors: Wen-liang Wang1,2, Zong-ru Jiang1,2, Chen Hu1, Cheng Chen1,2, Zhen-quan Hu1, Ao-li Wang1, Li Wang1,2, Jing Liu1, Wen-chao Wang1,3, Qing-song Liu1,2,3,4
1 High Magnetic Field Laboratory, Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
2 University of Science and Technology of China, Hefei 230036, China
3 Precision Medicine Research Laboratory of Anhui Province, Hefei 230088, China
4 Institutes of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials, Ministry of Education, Anhui University, Hefei 230601, China
Correspondence to: Jing Liu: jingliu@hmfl.ac.cn, Wen-chao Wang: wwcbox@hmfl.ac.cn, Qing-song Liu: qsliulab97@hmfl.ac.cn,
DOI: 10.1038/s41401-020-0465-8
Received: 8 March 2020
Accepted: 17 June 2020
Advance online: 31 July 2020

Abstract

Inhibition of glycolysis process has been an attractive approach for cancer treatment due to the evidence that tumor cells are more dependent on glycolysis rather than oxidative phosphorylation pathway. Preliminary evidence shows that inhibition of phosphoglycerate kinase 1 (PGK1) kinase activity would reverse the Warburg effect and make tumor cells lose the metabolic advantage for fueling the proliferation through restoration of the pyruvate dehydrogenase (PDH) activity and subsequently promotion of pyruvic acid to enter the Krebs cycle in glioma. However, due to the lack of small molecule inhibitors of PGK1 kinase activity to treat glioma, whether PGK1 could be a therapeutic target of glioma has not been pharmacologically verified yet. In this study we developed a high-throughput screening and discovered that NG52, previously known as a yeast cell cycle-regulating kinase inhibitor, could inhibit the kinase activity of PGK1 (the IC50 = 2.5 ± 0.2 μM). We showed that NG52 dose-dependently inhibited the proliferation of glioma U87 and U251 cell lines with IC50 values of 7.8 ± 1.1 and 5.2 ± 0.2 μM, respectively, meanwhile it potently inhibited the proliferation of primary glioma cells. We further revealed that NG52 (12.5–50 μM) effectively inhibited the phosphorylation of PDHK1 at Thr338 site and the phosphorylation of PDH at Ser293 site in U87 and U251 cells, resulting in more pyruvic acid entering the Krebs cycle with increased production of ATP and ROS. Therefore, NG52 could reverse the Warburg effect by inhibiting PGK1 kinase activity, and switched cellular glucose metabolism from anaerobic mode to aerobic mode. In nude mice bearing patient-derived glioma xenograft, oral administration of NG52 (50, 100, 150 mg· kg−1·d−1, for 13 days) dose-dependently suppressed the growth of glioma xenograft. Together, our results demonstrate that targeting PGK1 kinase activity might be a potential strategy for glioma treatment.
Keywords: PGK1; NG52; kinase inhibitor; Warburg effect; glioma

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