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The Pro-Apoptotic Role of the Regulatory Feedback Loop between miR-124 and PKM1/HNF4α in Colorectal Cancer Cells
Accumulating evidence indicates that miRNA regulatory circuits play important roles in tumorigenesis. We previously reported that miR-124 is correlated with prognosis of colorectal cancer due to PKM-dependent regulation of glycolysis. However, the mechanism by which miR-124 regulates apoptosis in co...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Molecular Diversity Preservation International (MDPI)
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3975400/ https://www.ncbi.nlm.nih.gov/pubmed/24619225 http://dx.doi.org/10.3390/ijms15034318 |
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author | Sun, Yan Zhao, Xiaoping Luo, Man Zhou, Yuhong Ren, Weiying Wu, Kefen Li, Xi Shen, Jiping Hu, Yu |
author_facet | Sun, Yan Zhao, Xiaoping Luo, Man Zhou, Yuhong Ren, Weiying Wu, Kefen Li, Xi Shen, Jiping Hu, Yu |
author_sort | Sun, Yan |
collection | PubMed |
description | Accumulating evidence indicates that miRNA regulatory circuits play important roles in tumorigenesis. We previously reported that miR-124 is correlated with prognosis of colorectal cancer due to PKM-dependent regulation of glycolysis. However, the mechanism by which miR-124 regulates apoptosis in colorectal cancer remains largely elusive. Here, we show that miR-124 induced significant apoptosis in a panel of colorectal cancer cell lines. The mitochondrial apoptosis pathway was activated by miR-124. Furthermore, the pro-apoptotic role of miR-124 was dependent on the status of PKM1/2 level. PKM1 was required for miR-124-induced apoptosis. Via direct protein-protein interaction, PKM1 promoted HNF4α binding to the promoter region of miR-124 and transcribing miR-124. Moreover, HNF4α or PKM1 had a more dramatic effect on colorectal cancer cell apoptosis in the presence of miR-124. However, inhibition of miR-124 blocked cell apoptosis induced by HNF4α or PKM1. These data indicate that miR-124 not only alters the expression of genes involved in glucose metabolism but also stimulates cancer cell apoptosis. In addition, the positive feedback loop between miR-124 and PKM1/HNF4α plays an important role in colorectal cancer cell apoptosis; it suggests that disrupting this regulatory circuit might be a potential therapeutic tool for colorectal cancer treatment. |
format | Online Article Text |
id | pubmed-3975400 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Molecular Diversity Preservation International (MDPI) |
record_format | MEDLINE/PubMed |
spelling | pubmed-39754002014-04-04 The Pro-Apoptotic Role of the Regulatory Feedback Loop between miR-124 and PKM1/HNF4α in Colorectal Cancer Cells Sun, Yan Zhao, Xiaoping Luo, Man Zhou, Yuhong Ren, Weiying Wu, Kefen Li, Xi Shen, Jiping Hu, Yu Int J Mol Sci Article Accumulating evidence indicates that miRNA regulatory circuits play important roles in tumorigenesis. We previously reported that miR-124 is correlated with prognosis of colorectal cancer due to PKM-dependent regulation of glycolysis. However, the mechanism by which miR-124 regulates apoptosis in colorectal cancer remains largely elusive. Here, we show that miR-124 induced significant apoptosis in a panel of colorectal cancer cell lines. The mitochondrial apoptosis pathway was activated by miR-124. Furthermore, the pro-apoptotic role of miR-124 was dependent on the status of PKM1/2 level. PKM1 was required for miR-124-induced apoptosis. Via direct protein-protein interaction, PKM1 promoted HNF4α binding to the promoter region of miR-124 and transcribing miR-124. Moreover, HNF4α or PKM1 had a more dramatic effect on colorectal cancer cell apoptosis in the presence of miR-124. However, inhibition of miR-124 blocked cell apoptosis induced by HNF4α or PKM1. These data indicate that miR-124 not only alters the expression of genes involved in glucose metabolism but also stimulates cancer cell apoptosis. In addition, the positive feedback loop between miR-124 and PKM1/HNF4α plays an important role in colorectal cancer cell apoptosis; it suggests that disrupting this regulatory circuit might be a potential therapeutic tool for colorectal cancer treatment. Molecular Diversity Preservation International (MDPI) 2014-03-11 /pmc/articles/PMC3975400/ /pubmed/24619225 http://dx.doi.org/10.3390/ijms15034318 Text en © 2014 by the authors; licensee MDPI, Basel, Switzerland http://creativecommons.org/licenses/by/3.0/ This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/). |
spellingShingle | Article Sun, Yan Zhao, Xiaoping Luo, Man Zhou, Yuhong Ren, Weiying Wu, Kefen Li, Xi Shen, Jiping Hu, Yu The Pro-Apoptotic Role of the Regulatory Feedback Loop between miR-124 and PKM1/HNF4α in Colorectal Cancer Cells |
title | The Pro-Apoptotic Role of the Regulatory Feedback Loop between miR-124 and PKM1/HNF4α in Colorectal Cancer Cells |
title_full | The Pro-Apoptotic Role of the Regulatory Feedback Loop between miR-124 and PKM1/HNF4α in Colorectal Cancer Cells |
title_fullStr | The Pro-Apoptotic Role of the Regulatory Feedback Loop between miR-124 and PKM1/HNF4α in Colorectal Cancer Cells |
title_full_unstemmed | The Pro-Apoptotic Role of the Regulatory Feedback Loop between miR-124 and PKM1/HNF4α in Colorectal Cancer Cells |
title_short | The Pro-Apoptotic Role of the Regulatory Feedback Loop between miR-124 and PKM1/HNF4α in Colorectal Cancer Cells |
title_sort | pro-apoptotic role of the regulatory feedback loop between mir-124 and pkm1/hnf4α in colorectal cancer cells |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3975400/ https://www.ncbi.nlm.nih.gov/pubmed/24619225 http://dx.doi.org/10.3390/ijms15034318 |
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