Abstract:
:MICAL2 is a tumor-promoting factor involved in cell migration, invasion, deformation, and proliferation not yet fully explored in lung adenocarcinoma (LUAD). This study demonstrated that MICAL2 was overexpressed and cytoplasm-enriched in LUAD tissues. Moreover, high cytoplasmic MICAL2 and/or total MICAL2 expression levels were positively correlated with lymphatic metastasis and shorter overall survival in LUAD patients. MICAL2 promoted LUAD cell proliferation, migration, invasion, and epithelial to mesenchymal transition-all of which involved the AKT and myosin-9 pathways. Furthermore, MICAL2 was identified as a nucleoplasm shuttling protein dependent on myosin-9 and its C-terminal fragment. MICAL2-ΔC-enriched in the nucleus-had less impact on tumor malignancy in LUAD cells in vitro and in vivo. Tumor promotion by MICAL2 was reduced by nuclear-export inhibitor, myosin-9 inhibitor, or si-myosin-9-all of which effectively inhibited MICAL2's nuclear export. Finally, the expression and subcellular location as well as clinical significance of MICAL2 and myosin-9 were analyzed across TCGA data and LUAD tissue arrays. Our data revealed that MICAL2 overexpression and nuclear export were associated with cancer progression; inhibiting its expression and/or nuclear export may provide a new target for LUAD therapy.
journal_name
Cancer Lettjournal_title
Cancer lettersauthors
Zhou W,Liu Y,Gao Y,Cheng Y,Chang R,Li X,Zhou Y,Wang S,Liang L,Duan C,Zhang Cdoi
10.1016/j.canlet.2020.04.019subject
Has Abstractpub_date
2020-07-28 00:00:00pages
75-86eissn
0304-3835issn
1872-7980pii
S0304-3835(20)30213-5journal_volume
483pub_type
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