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A 3D System for Culturing Human Articular Chondrocytes in Synovial Fluid
Published on: January 31, 2012
Cryoprotective agent toxicity interactions in human articular chondrocytes
K A Almansoori1, V Prasad, J F Forbes
1Division of Orthopaedic Surgery, Department of Surgery, University of Alberta, Edmonton, AB, Canada T6G 2B7. almansoori@ualberta.ca
Cryobiology
|January 26, 2012
Summary
Multiple cryoprotective agent (CPA) solutions are less toxic to chondrocytes than single-CPA solutions. Combining DMSO, ethylene glycol, glycerol, and formamide at 6.0 M yielded the highest cell survival rates.
Area of Science:
- Cellular biology
- Cryobiology
- Biomaterials science
Background:
- Vitrification uses high concentrations of cryoprotective agents (CPAs) to preserve cells and tissues.
- High CPA concentrations are cytotoxic, necessitating toxicity assessments.
- Understanding CPA toxicity is crucial for optimizing cryopreservation protocols.
Purpose of the Study:
- To evaluate the direct and indirect toxicities of single and multiple CPA solutions on chondrocytes.
- To quantify the toxicity interactions between different CPAs.
Main Methods:
- Human articular chondrocytes were exposed to single and multiple CPA solutions (DMSO, EG, PG, Gy, Fm) at 6.0 M and 8.1 M.
- Cell survival was assessed using a fluorescent cell membrane integrity assay.
- Regression analysis quantified indirect toxicity effects of CPA combinations.
Main Results:
- Multiple-CPA solutions showed significantly lower toxicity than single-CPA solutions (P<0.01).
- A four-CPA combination (DMSO-EG-Gy-Fm) achieved approximately 40% cell survival at 6.0 M.
- Propylene glycol (PG) was the most toxic CPA in combinations, diminishing benefits of multi-CPA use.
Conclusions:
- Multiple-CPA solutions offer reduced cytotoxicity compared to single-CPA solutions at equivalent concentrations.
- Propylene glycol (PG) exhibits the highest toxicity when incorporated into CPA mixtures.
- The 6.0 M DMSO-EG-Gy-Fm combination demonstrated optimal chondrocyte survival in this study.
