Protein kinase CK2 modulation of pyruvate kinase M isoforms augments the Warburg effect in cancer cells

Journal of Cellular Biochemistry
Kyung Mi Yang, Kunhong Kim

Abstract

Protein kinase CK2 is active in cancer cells. Previously, we reported that increased CK2 activity could induce epithelial mesenchymal transition of cancer cells. CK2 also induced epithelial mesenchymal transition in colon cancer cell lines such as HT29 and SW620, and the transitioned cells (CK2α cells) became more proliferative than the controls. We assumed that CK2 could affect cancer cell growth by modulating their energy metabolism. Here, we examined the molecular effects of CK2 on the glucose metabolism of cancer cells. We found that CK2α cells consumed more glucose and produced more lactate than control cells did. An XF glycolysis stress test showed that aerobic glycolysis was augmented up to the cancer cell's maximal glycolytic capacity in CK2α cells. Molecular analysis revealed that pyruvate kinase M1 was downregulated and pyruvate kinase M2 was nuclear localized in CK2α cells. Consequently, the expression and activity of lactate dehydrogenase A (LDHA) were upregulated. Treatment with FX11-a specific LDHA inhibitor-or clustered regularly interspaced short palindromic repeats (CRISPR)-mediated knockout of LDHA inhibited the CK2-driven proliferation of cancer cells. We conclude that CK2 augments the Warburg effect, resulti...Continue Reading

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Citations

Apr 18, 2020·Frontiers in Oncology·Matthias LäscheCarsten Gründker
Jul 7, 2020·Frontiers in Oncology·Eduardo Silva-Pavez, Julio C Tapia
May 18, 2021·Signal Transduction and Targeted Therapy·Christian BorgoMaria Ruzzene
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