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An In Vitro Organ Culture Model of the Murine Intervertebral Disc
Published on: April 11, 2017
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An Intervertebral Disc (IVD) Regeneration Model Using Human Nucleus Pulposus Cells (iHNPCs) and Annulus Fibrosus
Yi Zhu1,2,3, Qing Liu3,4, Chao Yu3,5
1Department of Orthopaedic Surgery, The First Affiliated Hospital of Soochow University, Orthopaedic Institute, Soochow University, Suzhou, 215006, China.
Advanced Healthcare Materials
|March 7, 2025
Summary
This study developed a novel tissue engineering approach for intervertebral disc degeneration using immortalized cells and a 3D scaffold. The engineered disc successfully regenerated cartilage and bone, offering a promising solution for low back pain.
Area of Science:
- Biomedical Engineering
- Regenerative Medicine
- Orthopedics
Background:
- Intervertebral disc degeneration (IVDD) causes low back pain, often due to nucleus pulposus dehydration.
- Current treatments are limited to symptom management or surgery, highlighting the need for regenerative strategies.
- Tissue engineering offers a promising approach using cells, biofactors, and scaffolds.
Purpose of the Study:
- To develop an in vitro model for intervertebral disc regeneration using immortalized human nucleus pulposus cells (iHNPCs) and annulus fibrosus cells (iHAFCs).
- To evaluate the potential of these engineered cells within a 3D-printed scaffold for IVD repair.
- To assess the regenerative capacity in an ex vivo spine fusion model.
Main Methods:
- Human nucleus pulposus cells (NPCs) and annulus fibrosus cells (AFCs) were immortalized using human telomerase reverse transcriptase (hTERT).
- A 3D-printed citrate-based scaffold was used to create a dual-cell region model with specific growth factor stimulation (BMP9 and BMP2).
- Histological analysis and an ex vivo spine fusion model were employed to assess tissue formation and regenerative potential.
Main Results:
- Immortalized iHNPCs and iHAFCs expressed specific cell markers and demonstrated reversible immortalization without tumorigenicity.
- iHAFCs showed osteogenic potential, while iHNPCs exhibited chondrogenic differentiation.
- The engineered IVD model successfully regenerated cartilage in the central region (iHNPCs) and bone in the peripheral region (iHAFCs), mimicking native IVD structure. Robust bone formation was observed in the spine fusion model.
Conclusions:
- Immortalized iHAFCs and iHNPCs are viable cell sources for intervertebral disc tissue engineering.
- The developed 3D scaffold and cell model show significant potential for regenerating IVD structures.
- This approach offers a promising regenerative strategy for treating intervertebral disc degeneration and associated low back pain.
Keywords:
annulus fibrosus cells (AFCs)intervertebral disc degenerationintervertebral disc regenerationintervertebral discsnucleus pulposus cells (NPCs)tissue engineeringMore Related Videos
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