Abstract
We studied the role of long intergenic non-protein coding RNA 00,511 (LINC00511) in lung adenocarcinoma (LUAD), with a specific focus on acquired chemoresistance. LINC00511 expression was higher in responders to cisplatin (DDP, another name for cisplantin) than non-responders, in A549/DDP cells than in parental A549 cells and normal human bronchial epithelial cells (16HBE). LINC00511 knockdown decreased the half maximal inhibitory concentration (IC50) value, suppressed A549/DDP cell viability, but induced apoptosis. LINC00511 bound with miR-182 and increased the expression of baculoviral inhibitor of apoptosis protein (IAP) repeat containing 5 (BIRC5). BIRC5 knockdown mimicked the effects of LINC00511 knockdown on the IC50 value, A549/DDP cell viability, and apoptosis. BIRC5 overexpression negated the effects of LINC00511 knockdown on A549/DDP cells. In vivo, LINC00511 knockdown attenuated the tumorigenesis of A549/DDP cells after DDP injection. These results provide a novel LINC00511/miR-182/BIRC5 paradigm to explain the mechanism of acquired DDP resistance.
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