Insulin-like growth factor-1 signaling regulates miRNA expression in MCF-7 breast cancer cell line

In breast carcinomas, increased levels of insulin-like growth factor 1 (IGF-1) can act as a mitogen to augment tumorigenesis through the regulation of MAPK and AKT signaling pathways. Signaling through these two pathways allows IGF-1 to employ mechanisms that favor proliferation and cellular surviva...

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Veröffentlicht in:PloS one 2012-11, Vol.7 (11), p.e49067
Hauptverfasser: Martin, Elizabeth C, Bratton, Melyssa R, Zhu, Yun, Rhodes, Lyndsay V, Tilghman, Syreeta L, Collins-Burow, Bridgette M, Burow, Matthew E
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container_issue 11
container_start_page e49067
container_title PloS one
container_volume 7
creator Martin, Elizabeth C
Bratton, Melyssa R
Zhu, Yun
Rhodes, Lyndsay V
Tilghman, Syreeta L
Collins-Burow, Bridgette M
Burow, Matthew E
description In breast carcinomas, increased levels of insulin-like growth factor 1 (IGF-1) can act as a mitogen to augment tumorigenesis through the regulation of MAPK and AKT signaling pathways. Signaling through these two pathways allows IGF-1 to employ mechanisms that favor proliferation and cellular survival. Here we demonstrate a subset of previously described tumor suppressor and oncogenic microRNAs (miRNAs) that are under the direct regulation of IGF-1 signaling. Additionally, we show that the selective inhibition of either the MAPK or AKT pathways prior to IGF-1 stimulation prevents the expression of previously described tumor suppressor miRNAs that are family and cluster specific. Here we have defined, for the first time, specific miRNAs under the direct regulation of IGF-1 signaling in the estrogen receptor positive MCF-7 breast cancer cell line and demonstrate kinase signaling as a modulator of expression for a small subset of microRNAs. Taken together, these data give new insights into mechanisms governing IGF-1 signaling in breast cancer.
doi_str_mv 10.1371/journal.pone.0049067
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subjects AKT protein
Apoptosis
Biology
Breast cancer
Breast carcinoma
Breast Neoplasms - genetics
Breast Neoplasms - metabolism
Breast Neoplasms - pathology
Cancer
Carcinoma - genetics
Carcinoma - metabolism
Carcinoma - pathology
Cell cycle
Cell growth
Cell Line, Tumor
Cell Proliferation - drug effects
Cell survival
Cell Survival - drug effects
Estrogens
Female
Gastric cancer
Gene expression
Gene Expression Profiling
Gene Expression Regulation, Neoplastic - drug effects
Hematology
Humans
Insulin
Insulin-like growth factor I
Insulin-Like Growth Factor I - genetics
Insulin-Like Growth Factor I - metabolism
Insulin-Like Growth Factor I - pharmacology
Insulin-like growth factors
Kinases
Liver cancer
MAP kinase
Medical research
Medicine
Metastasis
MicroRNA
MicroRNAs
MicroRNAs - genetics
MicroRNAs - metabolism
miRNA
Mitogen-Activated Protein Kinase Kinases - antagonists & inhibitors
Mitogen-Activated Protein Kinase Kinases - genetics
Mitogen-Activated Protein Kinase Kinases - metabolism
Oligonucleotide Array Sequence Analysis
Oncology
Pathways
Protein Kinase Inhibitors - pharmacology
Proteins
Proto-Oncogene Proteins c-akt - antagonists & inhibitors
Proto-Oncogene Proteins c-akt - genetics
Proto-Oncogene Proteins c-akt - metabolism
Real-Time Polymerase Chain Reaction
Signal transduction
Signal Transduction - drug effects
Signaling
Stomach cancer
Tumor suppressor genes
Tumorigenesis
title Insulin-like growth factor-1 signaling regulates miRNA expression in MCF-7 breast cancer cell line
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