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Updated: Apr 16, 2026
Three-Dimensional Bone Extracellular Matrix Model for Osteosarcoma
Published on: April 12, 2019
miR-27a and miR-27a* contribute to metastatic properties of osteosarcoma cells
Zaidoun Salah1,2, Rand Arafeh1, Vadim Maximov1
1The Lautenberg Center for Immunology and Cancer Research, IMRIC, Hebrew University-Hadassah Medical School, Jerusalem, Israel.
Abstract:
Osteosarcoma (OS) is the most common primary malignant bone tumor in adolescents and young adults. The essential mechanisms underlying osteosarcomagenesis and progression continue to be obscure. MicroRNAs (miRNAs) have far-reaching effects on the cellular biology of development and cancer. We recently reported that unique miRNA signatures associate with the pathogenesis and progression of OS. Of particular interest, we found that higher expression of miR-27a is associated with clinical metastatic disease. We report here that overexpression of miR-27a/miR-27a*, a microRNA pair derived from a single precursor, promotes pulmonary OS metastases formation. By contrast, sequestering miR-27a/miR-27a* by sponge technology suppressed OS cells invasion and metastases formation. miR-27a/miR-27a* directly repressed CBFA2T3 expression among other target genes. We demonstrated that CBFA2T3 is downregulated in majority of OS samples and its over expression significantly attenuated OS metastatic process mediated by miR-27a/miR-27a* underscoring CBFA2T3 functions as a tumor suppressor in OS. These findings establish that miR-27a/miR-27a* pair plays a significant role in OS metastasis and proposes it as a potential diagnostic and therapeutic target in managing OS metastases.
Insights
MicroRNA miR-27a/miR-27a* promotes osteosarcoma (OS) metastasis by repressing the tumor suppressor CBFA2T3. Targeting this microRNA pair offers a potential therapeutic strategy for managing OS metastasis.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Osteosarcoma (OS) is a primary bone cancer common in young adults, with poorly understood progression mechanisms.
- MicroRNAs (miRNAs) are key regulators of cellular processes, including cancer development.
- Previous work linked specific miRNA signatures to OS pathogenesis and progression, with higher miR-27a correlating with metastasis.
Purpose of the Study:
- To investigate the role of the miR-27a/miR-27a* microRNA pair in osteosarcoma metastasis.
- To identify the downstream targets and regulatory mechanisms of miR-27a/miR-27a* in OS.
- To evaluate miR-27a/miR-27a* as a potential diagnostic and therapeutic target for OS metastasis.
Main Methods:
- Overexpression of miR-27a/miR-27a* in OS cells to assess pulmonary metastasis formation.
- Utilizing sponge technology to sequester miR-27a/miR-27a* and evaluate its effect on OS cell invasion and metastasis.
- Target gene prediction and validation, focusing on CBFA2T3.
- Analysis of CBFA2T3 expression in OS patient samples.
Main Results:
- Overexpression of miR-27a/miR-27a* significantly promoted pulmonary osteosarcoma metastasis.
- Inhibition of miR-27a/miR-27a* using sponge technology suppressed OS cell invasion and metastasis.
- miR-27a/miR-27a* was found to directly repress the expression of CBFA2T3.
- CBFA2T3 was downregulated in most OS samples, and its overexpression attenuated miR-27a/miR-27a*-mediated metastasis.
Conclusions:
- The miR-27a/miR-27a* pair plays a critical role in promoting osteosarcoma metastasis.
- CBFA2T3 functions as a tumor suppressor in osteosarcoma, antagonizing the metastatic effects of miR-27a/miR-27a*.
- miR-27a/miR-27a* represents a promising diagnostic and therapeutic target for osteosarcoma metastasis.
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