Related Experiment Video
Updated: Jun 23, 2026
08:03
An In Vitro Organ Culture Model of the Murine Intervertebral Disc
Published on: April 11, 2017
Solute transport in intervertebral disc: experiments and finite element modeling
D B Das1, A Welling, J P G Urban
1Department of Chemical Engineering, Loughborough University, Loughborough, United Kingdom. d.b.das@lboro.ac.uk
Annals of the New York Academy of Sciences
|May 12, 2009
Summary
Direct injection into the intervertebral disc (IVD) effectively delivers therapeutic molecules to degenerating regions. Bloodstream delivery is less efficient, requiring prolonged high concentrations for IVD penetration.
Area of Science:
- Biomedical Engineering
- Biophysics
- Cell Biology
Background:
- Intervertebral disc (IVD) degeneration is linked to impaired nutrient supply to disc cells.
- Understanding solute transport is crucial for developing effective treatments for disc degeneration.
Purpose of the Study:
- To investigate and compare solute transport dynamics within the IVD.
- To evaluate the efficacy of different delivery methods for therapeutic agents into the IVD.
Main Methods:
- In vitro measurement of diffusion coefficients for dextran molecules (3-70 kDa) in IVD tissues using the concentration gradient technique.
- Modeling studies comparing steady-state and transient diffusion.
- Analysis of solute distribution following injection into the disc versus the bloodstream.
Main Results:
- Diffusion coefficients decrease non-linearly with increasing molecular weight, particularly for molecules <10 kDa.
- Direct injection into the IVD achieves higher concentrations and better coverage than bloodstream injection.
- Bloodstream delivery results in rapid concentration dissipation and poor penetration to central disc regions.
Conclusions:
- Direct injection into the IVD is the most effective method for rapid delivery of drugs or growth factors to degenerating areas.
- Achieving therapeutic concentrations via bloodstream delivery requires sustained high solute levels for extended periods.
Related Concept Videos
01:29Herniated Intervertebral Disc l: Introduction
Intervertebral disc herniation refers to the displacement of the nucleus pulposus (the gel-like inner core of the disc) through a tear or weakened area in the annulus fibrosus (the outer fibrous ring). The displaced disc material extends beyond the normal boundaries of the disc space and may compress or irritate nearby spinal nerve roots or, less commonly, the spinal cord.Etiology and Risk FactorsHerniation commonly results from degeneration, in which aging reduces disc hydration and...
01:27Degenerative Disc Disease I: Introduction
Degenerative disc disease is a chronic condition in which intervertebral discs gradually lose structure and function. It is not infectious or autoimmune; rather, it results from age-related biochemical and mechanical changes, influenced by genetic, metabolic, and environmental factors.Structure and Function of DiscsThe spine contains 23 intervertebral discs that absorb load, distribute forces, maintain spacing, and allow flexibility. Each disc consists of a nucleus pulposus, a gel-like core...
01:23Degenerative Disc Disease ll: Pathophysiology
The symptoms of degenerative disc disease arise from a combination of mechanical compression, vascular compromise, and biochemical inflammation, which together disrupt nerve function and produce pain.Mechanical CompressionDisc degeneration reduces height and elasticity, predisposing to herniation of the nucleus pulposus, a major cause of radicular pain. Herniations may be protrusion (bulging with intact annulus), extrusion (nucleus extends beyond disc but remains connected), or sequestration...