The DOI matches its Crossref record; 38 of the 38 references it cites were found in a registry or an index.
Coordinate Regulation of FOXO1 by miR-27a, miR-96, and miR-182 in Breast Cancer Cells
Open accessAbstract
The FOXO1 transcription factor orchestrates the regulation of genes involved in the apoptotic response, cell cycle checkpoints, and cellular metabolism. FOXO1 is a putative tumor suppressor, and the expression of this gene is dysregulated in some cancers, including prostate and endometrial cancers. However, the molecular mechanism resulting in aberrant expression of human FOXO1 in cancer cells is poorly understood. We show here that FOXO1 mRNA is down-regulated in breast tumor samples as compared with normal breast tissue. Silencing of the microRNA processing enzymes, Drosha and Dicer, led to an increase in FOXO1 expression. We also identified functional and specific microRNA target sites in the FOXO1 3'-untranslated region for miR-27a, miR-96, and miR-182, microRNAs that have previously been linked to oncogenic transformation. The three microRNAs, miR-27a, miR-96 and miR-182, were observed to be highly expressed in MCF-7 breast cancer cells, in which the level of FOXO1 protein is very low. Antisense inhibitors to each of these microRNAs led to a significant increase in endogenous FOXO1 expression and to a decrease in cell number in a manner that was blocked by FOXO1 siRNA. Overexpression of FOXO1 resulted in decreased cell viability because of inhibition of cell cycle traverse and induction of cell death. We have identified a novel mechanism of FOXO1 regulation, and targeting of FOXO1 by microRNAs may contribute to transformation or maintenance of an oncogenic state in breast cancer cells.
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FOXOs: signalling integrators for homeostasis maintenance
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The Promising Role of miR-21 as a Cancer Biomarker and Its Importance in RNA-Based Therapeutics
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FOXO Signaling Pathways as Therapeutic Targets in Cancer
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Down-Regulation of a Host MicroRNA by a Herpesvirus saimiri Noncoding RNA
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Metadata
- Authors
- Guttilla, I. K., & White, B. A.
- Venue
- Journal of Biological Chemistry
- Publisher
- Elsevier BV
- Published
- 2009-08
- Volume
- 284
- Issue
- 35
- Pages
- 23204-23216
- ISSN
- 0021-9258 (ISSN-L)
- OpenAlex
- W2133098474
- Cited by
- 560
- References
- 38
- FWCI
- 10.59
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- Guttilla, I. K., & White, B. A. (2009). Coordinate Regulation of FOXO1 by miR-27a, miR-96, and miR-182 in Breast Cancer Cells. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.m109.031427
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