miRNA-mediated TUSC3 deficiency enhances UPR and ERAD to promote metastatic potential of NSCLC

Young Jun Jeon, Taewan Kim, Dongju Park, Gerard J. Nuovo, Siyeon Rhee, Pooja Joshi, Bum Kyu Lee, Johan Jeong, Sung suk Suh, Jeff E. Grotzke, Sung Hak Kim, Jieun Song, Hosung Sim, Yonghwan Kim, Yong Peng, Youngtae Jeong, Michela Garofalo, Nicola Zanesi, Jonghwan Kim, Guang LiangIchiro Nakano, Peter Cresswell, Patrick Nana-Sinkam, Ri Cui, Carlo M. Croce

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46 Scopus citations

Abstract

Non-small cell lung carcinoma (NSCLC) is leading cause of cancer-related deaths in the world. The Tumor Suppressor Candidate 3 (TUSC3) at chromosome 8p22 known to be frequently deleted in cancer is often found to be deleted in advanced stage of solid tumors. However, the role of TUSC3 still remains controversial in lung cancer and context-dependent in several cancers. Here we propose that miR-224/-520c-dependent TUSC3 deficiency enhances the metastatic potential of NSCLC through the alteration of three unfolded protein response pathways and HRD1-dependent ERAD. ATF6α-dependent UPR is enhanced whereas the affinity of HRD1 to its substrates, PERK, IRE1α and p53 is weakened. Consequently, the alteration of UPRs and the suppressed p53-NM23H1/2 pathway by TUSC3 deficiency is ultimately responsible for enhancing metastatic potential of lung cancer. These findings provide mechanistic insight of unrecognized roles of TUSC3 in cancer progression and the oncogenic role of HRD1-dependent ERAD in cancer metastasis.

Original languageEnglish
Article number5110
JournalNature Communications
Volume9
Issue number1
DOIs
StatePublished - 1 Dec 2018
Externally publishedYes

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