Related Experiment Video
Updated: May 31, 2026
08:07
Three-Dimensional Bone Extracellular Matrix Model for Osteosarcoma
Published on: April 12, 2019
Single-Cell Transcriptomic Analysis Suggests That JUN May Regulate BAMBI to Promote Osteosarcoma Cell Migration and
Ning Song1, Qiang Zhang1, Junwei Du1
1Department of Bone and Soft Tissue Tumor and Melanoma, Cancer Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China.
Human Mutation
|May 29, 2026
Summary
Distant osteosarcoma metastasis is poorly understood. Single-cell RNA sequencing revealed BAMBI downregulation promotes metastasis via TGF-β pathway activation, identifying potential therapeutic targets.
Area of Science:
- Oncology
- Genomics
- Molecular Biology
Background:
- Distant metastasis significantly worsens osteosarcoma prognosis.
- Mechanisms driving osteosarcoma metastasis remain largely unknown.
- Targeted therapies require deeper understanding of tumor heterogeneity.
Purpose of the Study:
- Investigate intratumoral heterogeneity in osteosarcoma using single-cell RNA sequencing.
- Identify immune and molecular markers associated with metastasis.
- Discover novel therapeutic targets for osteosarcoma.
Main Methods:
- Single-cell RNA sequencing (scRNA-seq) for heterogeneity assessment.
- InferCNV, differential gene expression, and pseudotime trajectory analyses.
- Validation using transcriptomic datasets and in vitro functional experiments.
Main Results:
- Identified 10 cell clusters; immune cell infiltration higher in metastatic osteosarcoma.
- Discovered BAMBI downregulation during transition to metastatic state.
- Linked JUN to BAMBI regulation, promoting TGF-β pathway activation and cell migration/invasion.
Conclusions:
- BAMBI downregulation, potentially regulated by JUN, drives osteosarcoma metastasis via TGF-β pathway.
- Findings offer potential immune and molecular targets for single-cell guided therapy.
- Identified mechanisms to potentially overcome therapeutic resistance in osteosarcoma.
Related Concept Videos
01:09Cell Migration
Cell migration, the process by which cells move from one location to another, is essential for the proper development and viability of organisms throughout their life. When cells are not able to migrate properly to their ordained locations, various disorders may occur. For example, disruption in cell migration causes chronic inflammatory diseases such as arthritis.
01:19Cell Migration
Cell migration is a process by which the cells move from one location to another, playing an essential role in embryological development, repair and regeneration, immune response, and metastasis. Cells migrate in response to chemical or mechanical signals generated by specific organs or tissues. The overall mechanism includes three steps - polarization, protrusion, and release. Polarization involves the formation of a distinct cell front and rear, which determines the direction of movement.
01:16TGF - β Signaling Pathway
The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors are of three kinds RI, RII, and RIII. The RI...
01:35Cancer Cell Migration through Invadopodia
Invadosome is a broad category of cell surface structures with proteolytic activity that degrades the extracellular matrix (ECM). Invadosomes are present in normal cell types, including macrophages, endothelial cells, and neurons, as well as tumor cells. Although the macrophage podosomes and tumor cell invadopodia are classified as invadosomes, they have different structures, molecular pathways, and functions. Podosomes are short structures that last for a few minutes. However, invadopodia can...