Microfluidic Disc-on-a-Chip Device for Mouse Intervertebral Disc-Pitching a Next-Generation Research Platform To...

Area of Science:

• Biomedical Engineering
• Regenerative Medicine
• Organ-on-a-chip Technology

Background:

• Low back pain, often caused by intervertebral disc degeneration, is a leading global disability.
• Current treatments for discogenic pain are largely symptomatic, lacking disease-modifying drugs.
• Limited understanding of disc biology and inadequate in vitro models hinder drug discovery for disc degeneration.

Purpose of the Study:

• To develop an advanced in vitro research platform for studying intervertebral disc degeneration.
• To investigate the impact of continuous nutrient supply via microfluidics on cultured mouse discs.
• To establish a more physiologically relevant model for preclinical disc degeneration research.

Main Methods:

• Development of a microfluidic "disc-on-a-chip" device specifically designed for mouse intervertebral disc organs.
• Culture of mouse discs within the microfluidic device to allow continuous media flow, mimicking the in vivo microenvironment.
• Comparison of biological performance (cell viability, structural integrity, metabolism) between microfluidic and static culture conditions.

Main Results:

• Mouse discs cultured on the microfluidic device demonstrated significantly higher cell viability compared to static cultures.
• The "disc-on-a-chip" system preserved the structural integrity of nucleus pulposus and annulus fibrosus.
• Enhanced anabolic-catabolic metabolism was observed in discs cultured using the microfluidic platform for up to 21 days.

Conclusions:

• The microfluidic "disc-on-a-chip" device provides a superior in vitro platform for long-term organ culture of intervertebral discs.
• This technology addresses limitations in current research models, accelerating the study of disc degeneration.
• The platform facilitates a better understanding of disc biology and pathology, crucial for developing new therapeutic strategies.