Non-small-cell lung carcinoma (NSCLC) is the most common kind of lung cancer, which is also the largest cause of cancer-linked deaths globally. A lack of effective prognostic biomarkers contributes to the poor prognosis of NSCLC. For better patient outcomes, NSCLC diagnosing, prognostic, and predictive biomarkers are critically needed. A component of the chromatin-modulatory complex that dampens gene expression, ING2 (inhibitor of growth family member 2), has been linked to cellular mechanisms that enhance tumor repression. Nevertheless, its role in human NSCLC is unclear. Herein, we observed that ING2 downregulation in NSCLC tissues correlates with poor NSCLC prognosis. Functional analysis illustrated that ING2 dampened growth, infiltration along with metastasis and blocked apoptosis of NSCLC cells in vitro, as well as in vivo. The mechanism might be implicated in the EMT (epithelial-mesenchymal transition) process. Mechanistically, we found that ING2 silencing suppresses the expressions of Wilms tumor 1-associated protein (WTAP) and that WTAP expression negatively correlates with ING2 expression. Moreover, rescue experiments illustrated that WTAP overexpression partially counteracts the effect of ING2 silencing on proliferation. Finally, we found that elevated WTAP levels correlate with poor NSCLC prognosis. These results highlight the prognostic and therapeutic potential of ING2-WTAP in NSCLC.

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