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• W2154010498 startingPage "1732" @default.
• W2154010498 abstract "Abstract MicroRNAs (miRNAs) are small noncoding RNAs that function as master regulators of posttranscriptional gene expression with each miRNA negatively regulating hundreds of genes. Lysophosphatidic acid (LPA) is a mitogenic lipid present within the ovarian tumor microenvironment and induces LPA receptor activation and intracellular signaling cascades like ERK/MAPK, leading to enhanced cellular proliferation. Here, we show that in SKOV-3 and OVCAR-3 cells, LPA stimulation at concentrations ranging from 1 nmol/L to 20 μmol/L for 30 to 60 minutes increases miR-30c-2*, and this effect is mediated through a combination of receptors because knock down of multiple LPA receptors is required for inhibition. The epidermal growth factor and platelet-derived growth factor also increase miR-30c-2* transcript expression, suggesting a broader responsive role for miR-30c-2*. Thus, we investigated the functional role of miR-30c-2* through ectopic expression of synthetic miRNA precursors of mature miRNA or antagomir transfection and observed that microRNA-30c-2* reduces, and the antagomir enhances, cell proliferation and viability in OVCAR-3, cisplatin-insensitive SKOV-3 and chemoresistant HeyA8-MDR cells. Ectopic expression of miR-30c-2* reduces BCL9 mRNA transcript abundance and BCL9 protein. Consistent with this observation, miR-30c-2* ectopic expression also reduced BCL9 luciferase reporter gene expression. In comparison with IOSE cells, all cancer cells examined showed increased BCL9 expression, which is consistent with its role in tumor progression. Taken together, this suggest that growth factor induced proliferation mediates a neutralizing response by significantly increasing miR-30c-2* which reduces BCL9 expression and cell proliferation in SKOV-3 and OVCAR-3 cells, likely as a mechanism to regulate signal transduction downstream. Mol Cancer Res; 9(12); 1732–45. ©2011 AACR." @default.
• W2154010498 created "2016-06-24" @default.
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• W2154010498 date "2011-12-01" @default.
• W2154010498 modified "2023-09-26" @default.
• W2154010498 title "MicroRNA-30c-2* Expressed in Ovarian Cancer Cells Suppresses Growth Factor–Induced Cellular Proliferation and Downregulates the Oncogene BCL9" @default.
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• W2154010498 doi "https://doi.org/10.1158/1541-7786.mcr-11-0245" @default.
• W2154010498 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22024689" @default.
• W2154010498 hasPublicationYear "2011" @default.
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