Title : Metallothionein-1G facilitates sorafenib resistance through inhibition of ferroptosis.

Pub. Date : 2016 Aug

PMID : 27015352






8 Functional Relationships(s)
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1 Metallothionein-1G facilitates sorafenib resistance through inhibition of ferroptosis. Sorafenib metallothionein 1G Homo sapiens
2 Here, we show that metallothionein (MT)-1G is a critical regulator and promising therapeutic target of sorafenib resistance in human HCC cells. Sorafenib metallothionein 1G Homo sapiens
3 The expression of MT-1G messenger RNA and protein is remarkably induced by sorafenib but not other clinically relevant kinase inhibitors (e.g., erlotinib, gefitinib, tivantinib, vemurafenib, selumetinib, imatinib, masitinib, and ponatinib). Sorafenib metallothionein 1G Homo sapiens
4 Activation of the transcription factor nuclear factor erythroid 2-related factor 2, but not p53 and hypoxia-inducible factor 1-alpha, is essential for induction of MT-1G expression following sorafenib treatment. Sorafenib metallothionein 1G Homo sapiens
5 Importantly, genetic and pharmacological inhibition of MT-1G enhances the anticancer activity of sorafenib in vitro and in tumor xenograft models. Sorafenib metallothionein 1G Homo sapiens
6 The molecular mechanisms underlying the action of MT-1G in sorafenib resistance involve the inhibition of ferroptosis, a novel form of regulated cell death. Sorafenib metallothionein 1G Homo sapiens
7 Knockdown of MT-1G by RNA interference increases glutathione depletion and lipid peroxidation, which contributes to sorafenib-induced ferroptosis. Sorafenib metallothionein 1G Homo sapiens
8 CONCLUSION: These findings demonstrate a novel molecular mechanism of sorafenib resistance and suggest that MT-1G is a new regulator of ferroptosis in HCC cells. Sorafenib metallothionein 1G Homo sapiens