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Effects of Cyclic Hydrostatic Pressure on the Metabolism of Human Osteoarthritic Chondrocytes Cultivated in a Collagen Gel

Effects of Cyclic Hydrostatic Pressure on the Metabolism of Human Osteoarthritic Chondrocytes... Abstract:  Among other parameters, the application of mechanical force may provide an important stimulus in modulating the structure and function of tissue‐engineered articular cartilage. We developed a cultivation chamber in which six collagen type‐I gel samples, seeded with human osteoarthritic chondrocytes, can be cultivated simultaneously. A cyclic hydrostatic pressure of up to 40 kPa with a frequency of 0.0125 Hz was applied, and cultivation was performed for 1, 4, 7, or 14 days. Histological examinations revealed a spheroidal cell morphology in the treatment group. In contrast, control samples of the same patients represented a more fibroblastic appearance. Collagen type‐II (col‐II) protein was found in the very pericellular region of all investigated samples; the col‐II content did not obviously vary between the control and treatment groups. In the treatment group, col‐II and aggrecan gene expression were elevated. A spectrophotometric quantification of proteoglycan concentrations in media supernatants revealed a statistically significant enhancement in the treatment group. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Artificial Organs Wiley

Effects of Cyclic Hydrostatic Pressure on the Metabolism of Human Osteoarthritic Chondrocytes Cultivated in a Collagen Gel

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References (39)

Publisher
Wiley
Copyright
Copyright © 2007 Wiley Subscription Services
ISSN
0160-564X
eISSN
1525-1594
DOI
10.1111/j.1525-1594.2007.00347.x
pmid
17298397
Publisher site
See Article on Publisher Site

Abstract

Abstract:  Among other parameters, the application of mechanical force may provide an important stimulus in modulating the structure and function of tissue‐engineered articular cartilage. We developed a cultivation chamber in which six collagen type‐I gel samples, seeded with human osteoarthritic chondrocytes, can be cultivated simultaneously. A cyclic hydrostatic pressure of up to 40 kPa with a frequency of 0.0125 Hz was applied, and cultivation was performed for 1, 4, 7, or 14 days. Histological examinations revealed a spheroidal cell morphology in the treatment group. In contrast, control samples of the same patients represented a more fibroblastic appearance. Collagen type‐II (col‐II) protein was found in the very pericellular region of all investigated samples; the col‐II content did not obviously vary between the control and treatment groups. In the treatment group, col‐II and aggrecan gene expression were elevated. A spectrophotometric quantification of proteoglycan concentrations in media supernatants revealed a statistically significant enhancement in the treatment group.

Journal

Artificial OrgansWiley

Published: Jan 1, 2007

Keywords: ; ; ; ;

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