DOI: 10.1002/jor.1100100602. Chondrocytes in agarose culture synthesize a mechanically functional extracellular matrix

Chondrocytes in agarose culture synthesize a mechanically functional extracellular matrix

10.1002/jor.1100100602

Crossref journal-article

Wiley

Journal of Orthopaedic Research (311)

Abstract

AbstractThe ability of chondrocytes from calf articular cartilage to synthesize and assemble a mechanically functional cartilage‐like extracellular matrix was quantified in high cell density (∼ 107 cell/ml) agarose gel culture. The time evolution of chondrocyte proliferation, proteoglycan synthesis and loss to the media, and total deposition of glycosaminoglycan (GAG)‐containing matrix within agarose gels was characterized during 10 weeks in culture. To assess whether the matrix deposited within the agarose gel was mechanically and electromechanically functional, we measured in parallel cultures the time evolution of dynamic mechanical stiffness and oscillatory streaming potential in uniaxial confined compression, and determined the intrinsic equilibrium modulus, hydraulic permeability, and electrokinetic coupling coefficient of the developing cultures. Biosynthetic rates were initially high, but by 1 month had fallen to a level similar to that found in the parent calf articular cartilage from which the cells were extracted. The majority of the newly synthesized proteoglycans remained in the gel. Histological sections showed matrix rich in proteoglycans and collagen fibrils developing around individual cells. The equilibrium modulus, dynamic stiffness, and oscillatory streaming potential rose to many times (>5X) their initial values at the start of the culture; the hydraulic permeability decreased to a fraction (∼1/10) that of the cell‐laden porous agarose at the beginning of the culture. By day 35 of culture, DNA concentration (cell density), GAG concentration, stiffness, and streaming potential were all ∼25% that of calf articular cartilage. The frequency dependence of the dynamic stiffness and potential was similar to that of calf articular cartilage. Together, these results suggested the formation of mechanically functional matrix.

Bibliography

Buschmann, M. D., Gluzband, Y. A., Grodzinsky, A. J., Kimura, J. H., & Hunziker, E. B. (1992). Chondrocytes in agarose culture synthesize a mechanically functional extracellular matrix. Journal of Orthopaedic Research, 10(6), 745â758. Portico.

Authors 5

Michael D. Buschmann (first)
Yehezkiel A. Gluzband (additional)
Alan J. Grodzinsky (additional)
James H. Kimura (additional)
Ernst B. Hunziker (additional)

References 45 Referenced 430

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Dates

Type	When
Created	20 years, 6 months ago (Feb. 24, 2005, 7:18 a.m.)
Deposited	1 year, 10 months ago (Oct. 24, 2023, 10:28 a.m.)
Indexed	1 month, 1 week ago (July 25, 2025, 6:21 a.m.)
Issued	32 years, 10 months ago (Nov. 1, 1992)
Published	32 years, 10 months ago (Nov. 1, 1992)
Published Online	20 years, 6 months ago (Feb. 18, 2005)
Published Print	32 years, 10 months ago (Nov. 1, 1992)

Funders 0

None

BibTeX

@article{Buschmann_1992, title={Chondrocytes in agarose culture synthesize a mechanically functional extracellular matrix}, volume={10}, ISSN={1554-527X}, url={http://dx.doi.org/10.1002/jor.1100100602}, DOI={10.1002/jor.1100100602}, number={6}, journal={Journal of Orthopaedic Research}, publisher={Wiley}, author={Buschmann, Michael D. and Gluzband, Yehezkiel A. and Grodzinsky, Alan J. and Kimura, James H. and Hunziker, Ernst B.}, year={1992}, month=nov, pages={745–758} }

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      }
    }
  ]
}