Journal article
Regulation of miR106b cluster through the RB pathway: Mechanism and functional targets
Cell cycle (Georgetown, Tex.), v 12(1)
01 Jan 2013
PMID: 23255112
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The RB pathway plays a critical role in proliferation control that is commonly subverted in tumor development. However, restoration of RB pathway function can be elicited in many tumor cells by the inhibition of CDK4/6 activity that leads to dephosphorylation of RB and subsequent repression of E2F-mediated transcription. In this context, active RB/E2F complexes inhibit the expression of a critical program of coding genes that promote cell cycle progression. However, the non-coding RNA target genes downstream from RB that could be relevant for tumor biology remain obscure. Here, miRNA gene expression profiling identified the miR106b cluster as being efficiently repressed with CDK4/6 inhibition in an E2F and RB-dependent manner. Importantly, the miR106B-cluster is intragenic of MCM7, and through a series of functional studies, the basis of MCM7 regulation and concordant expression of the miRNA species within the 106b cluster was determined. Importantly, RB-mediated repression of the 106b cluster enhances the transcript levels of p21Cip1 and PTEN. These data provide a mechanistic basis for cross-talk between the RB pathway and p21 and PTEN through the regulation of the MCM7/miR106b locus.
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Details
- Title
- Regulation of miR106b cluster through the RB pathway
- Creators
- Chellappagounder Thangavel - The University of Texas Southwestern Medical CenterEttickan Boopathi - University of PennsylvaniaAdam Ertel - Thomas Jefferson UniversityMeng Lim - Thomas Jefferson UniversitySankar Addya - Thomas Jefferson UniversityPaolo Fortina - Thomas Jefferson UniversityAgnieszka K. Witkiewicz - South Australia PathologyErik S. Knudsen - The University of Texas Southwestern Medical Center
- Publication Details
- Cell cycle (Georgetown, Tex.), v 12(1)
- Publisher
- Landes Bioscience
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- School of Biomedical Engineering, Science, and Health Systems
- Web of Science ID
- WOS:000313414700020
- Scopus ID
- 2-s2.0-84872321372
- Other Identifier
- 991019176799504721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Cell Biology