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- W1808286451 abstract "Lung cancer is the leading cause of cancer-related deaths worldwide. Non-small cell lung cancer (NSCLC), the major lung cancer subtype, is characterized by high resistance to chemotherapy. Here we demonstrate that Tudor staphylococcal nuclease (SND1 or TSN) is overexpressed in NSCLC cell lines and tissues, and is important for maintaining NSCLC chemoresistance. Downregulation of TSN by RNAi in NSCLC cells led to strong potentiation of cell death in response to cisplatin. Silencing of TSN was accompanied by a significant decrease in S100A11 expression at both mRNA and protein level. Downregulation of S100A11 by RNAi resulted in enhanced sensitivity of NSCLC cells to cisplatin, oxaliplatin and 5-fluouracil. AACOCF(3), a phospholipase A(2) (PLA(2)) inhibitor, strongly abrogated chemosensitization upon silencing of S100A11 suggesting that PLA(2) inhibition by S100A11 governs the chemoresistance of NSCLC. Moreover, silencing of S100A11 stimulated mitochondrial superoxide production, which was decreased by AACOCF(3), as well as N-acetyl-L-cysteine, which also mimicked the effect of PLA(2) inhibitor on NSCLC chemosensitization upon S100A11 silencing. Thus, we present the novel TSN-S100A11-PLA(2) axis regulating superoxide-dependent apoptosis, triggered by platinum-based chemotherapeutic agents in NSCLC that may be targeted by innovative cancer therapies." @default.
- W1808286451 created "2016-06-24" @default.
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- W1808286451 date "2015-03-26" @default.
- W1808286451 modified "2023-09-30" @default.
- W1808286451 title "Tudor staphylococcal nuclease drives chemoresistance of non-small cell lung carcinoma cells by regulating S100A11" @default.
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- W1808286451 doi "https://doi.org/10.18632/oncotarget.3495" @default.
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