A Comparison between Ultrasonic Bath and Direct Sonicator on Osteochondral Tissue Decellularization.
Farin Forouzesh1, Mohsen Rabbani1, Shahin Bonakdar2
1Department of Biomedical Engineering, University of Isfahan, Isfahan, Iran.
Journal of Medical Signals and Sensors
|November 19, 2019
Summary
Ultrasonic waves enhance the decellularization of articular cartilage using sodium dodecyl sulfate (SDS). This physical method improves material penetration and preserves extracellular matrix (ECM) structure for tissue engineering applications.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Regenerative Medicine
Background:
- Decellularization is crucial for tissue engineering but challenging for dense tissues like articular cartilage.
- Existing chemical methods face limitations in effectively removing cells while preserving the extracellular matrix (ECM).
- Physical methods are being explored to augment chemical treatments for improved decellularization.
Purpose of the Study:
- To investigate the efficacy of ultrasonic waves as a physical method to enhance articular cartilage decellularization.
- To evaluate the combined effects of ultrasonic waves and sodium dodecyl sulfate (SDS) on decellularization efficiency and ECM integrity.
- To assess the impact of direct and indirect sonication on the decellularization process.
Main Methods:
- Articular cartilage samples were treated with varying concentrations of SDS (0.1% and 1%) combined with direct or indirect ultrasonic waves.
- Decellularization effectiveness was assessed using hematoxylin and eosin (H&E) staining for cell nuclei.
- Extracellular matrix components, including glycosaminoglycans (GAG) and collagen, were evaluated using Alcian Blue and Picrosirius Red staining, respectively.
Main Results:
- A combination of 1% SDS and a 5-hour ultrasonic bath significantly reduced cell nucleus residue by 66%.
- Direct sonication created surface micropores, facilitating better decellularization agent penetration and subsequent cell attachment.
- Alcian Blue and Picrosirius Red staining confirmed the preservation of GAG and collagen within the ECM structure.
Conclusions:
- Ultrasonic baths effectively enhance the penetration of decellularization agents into articular cartilage.
- This physical method accelerates the decellularization process without causing significant structural damage to the tissue.
- The combination of ultrasound and SDS offers a promising approach for improved cartilage decellularization in tissue engineering.
