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Protein arginine methyltransferase 5 promotes metastasis via enhancing EGFR transcription and modulating AKT1 activation by methylation

Huang, L.; Zhang, X.-O.; Verdejo-Torres, O.; Wigglesworth, K.; Sun, X.; Sallis, B.; Moon, D.; Huang, T.; Rozen, E.; Zhang, L.; Wang, G.; Shohet, J. M.; Lee, M. M.; Wu, J. Q.

2020-09-30 cancer biology
10.1101/2020.08.12.246660 bioRxiv
Show abstract

Protein arginine methyltransferase 5 (PRMT5) regulates a wide range of physiological processes, including cancer cell proliferation and metastasis, by generating symmetric di-methyl-arginine marks on histones and non-histone proteins. Here, we report that PRMT5 directly regulates epidermal growth factor receptor (EGFR) transcription to control EGF stimulated EGFR signaling. Furthermore, PRMT5 modulates protein kinase B (AKT) activation by methylation of AKT1 Arg 15, which is required for its subsequent phosphorylation at AKT1 Thr 308 and Ser 473. The PRMT5/EGFR/AKT axis converges to regulate transcription factors ZEB1, SNAIL, and TWIST1 to promote the epithelial-mesenchymal transition (EMT), in the manner that EGFR and AKT1 compensate each other to support tumor cell invasion and metastasis. Inhibiting PRMT5 methyltransferase activity with a small molecule inhibitor attenuated primary tumor growth and prevented hepatic metastasis in aggressive in vivo tumor models. Collectively, our results support the use of PRMT5 based therapies for metastatic cancer.

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