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Analysis of Combinatorial miRNA Treatments to Regulate Cell Cycle and Angiogenesis
Published on: March 30, 2019
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Integrated approaches to miRNAs target definition: time-series analysis in an osteosarcoma differentiative model.
A Grilli1, M Sciandra2,3, M Terracciano4
1Laboratory of Experimental Oncology, CRS Development of Biomolecular Therapies, Rizzoli Orthopedic Institute, Via di Barbiano 1/10, 40136, Bologna, Italy. andrea.grilli@ior.it.
BMC Medical Genomics
|July 1, 2015
Summary
MicroRNAs (miRs) regulate gene expression. In osteosarcoma cells, miR-34a and TGFbeta signaling modulation drive cancer cell differentiation, offering potential therapeutic targets.
Area of Science:
- Molecular Biology
- Cancer Research
- Cell Biology
Background:
- MicroRNAs (miRs) are small non-coding RNAs regulating gene expression post-transcriptionally.
- Osteosarcoma (OS) is linked to blocked osteoblast differentiation.
- CD99 expression induces terminal differentiation in OS cells.
Purpose of the Study:
- To explore temporal transcriptional modifications in osteosarcoma cells.
- To compare gene and microRNA expression in Saos-2 cells and CD99-transfected clones.
- To investigate the role of CD99 in osteosarcoma differentiation.
Main Methods:
- Culturing parental and CD99-transfected OS cells in differentiating medium.
- Profiling gene and microRNA expression using arrays.
- Integrating gene and microRNA data through sequence complementarity and expression correlation.
- Performing enrichment and network analyses, and PCA for temporal analysis.
Main Results:
- Significant gene down-modulation (80%) and reversion to osteoblast-like phenotype.
- Enrichment in TGFbeta signaling pathways (AKT1, SMADs).
- Modulation of cancer-related miRs, including miR-34a, miR-26b, and miR-378.
- miR-34a identified as a key regulator of TGFbeta signaling genes during differentiation.
Conclusions:
- miR-34a expression and TGFbeta signaling down-modulation are critical for CD99-mediated OS cell differentiation.
- Specific molecular players involved in OS differentiation identified.
- Potential therapeutic strategies targeting these actors for differentiation therapy in OS.
