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Updated: Mar 20, 2026
Modeling Primary Bone Tumors and Bone Metastasis with Solid Tumor Graft Implantation into Bone
Published on: September 9, 2020
A Validated Preclinical Animal Model for Primary Bone Tumor Research
Ferdinand Wagner1, Boris M Holzapfel2, Laure Thibaudeau3
1Regenerative Medicine, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Australia Department of Orthopedics, Asklepios Klinikum Bad Abbach, University of Regensburg, Bad Abbach, Germany Department of Pediatric Surgery, Dr. von Hauner Children's Hospital, Ludwig-Maximilians-University Munich, Munich, Germany.
A novel humanized tissue-engineered bone organ (hTEBO) model was developed to improve osteosarcoma (OS) research. This model better mimics human physiology, enabling more accurate preclinical testing of new treatments for OS.
Area of Science:
- Biomedical Engineering
- Oncology
- Regenerative Medicine
Background:
- Osteosarcoma (OS) patient survival has stagnated despite advances in treatment.
- Current animal models present limitations due to interspecies differences, leading to unreliable preclinical results.
- Development of clinically relevant and reliable animal models is crucial for advancing OS treatment.
Purpose of the Study:
- To engineer and validate a humanized tissue-engineered bone organ (hTEBO) for preclinical research on primary bone tumors.
- To minimize false-positive and false-negative results in OS research by addressing interspecies differences.
- To create a more physiologically relevant model for testing novel therapeutic strategies.
Main Methods:
- Human pelvic bone and marrow fragments were embedded in a fibrin matrix with bone morphogenetic protein-7 (BMP-7).
- Engineered constructs were implanted into NOD-scid mice for 10 weeks to achieve humanization.
- Human osteosarcoma (OS) cells (Luc-SAOS-2) were injected into the humanized microenvironment, and tumor growth/metastasis were monitored using bioluminescence imaging.
Main Results:
- The engineered hTEBO successfully developed into a bone organ containing human bone matrix and hematopoietic cells.
- Injection of OS cells into the hTEBO led to spontaneous lung metastasis, mimicking clinical disease progression.
- Key prognostic markers (VEGF, periostin, HIF-2α) were detected in the humanized model, unlike traditional murine models.
Conclusions:
- A novel in vivo model was developed, successfully integrating human bone matrix and marrow components.
- BMP-7 was essential for maintaining viable stem cells and creating a human-like bone microenvironment.
- This hTEBO platform offers a promising new tool for preclinical evaluation of osteosarcoma treatments.
