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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Nugent, Ashleigh E. Reiter, David A. Fishbein, Kenneth W. McBurney, Denise L. Murray, Travis Bartusik, Dorota Ramaswamy, Sharan Spencer, Richard G. Horton, Walter E. |
| Description | Country affiliation: United States Author Affiliation: Nugent AE ( Department of Anatomy and Neurobiology, Northeastern Ohio Universities Colleges of Medicine and Pharmacy, Rootstown, Ohio 44272, USA. anugent@neoucom.edu) |
| Abstract | Osteoarthritis (OA) is a prevalent age-associated disease involving altered chondrocyte homeostasis and cartilage degeneration. The avascular nature of cartilage and the altered chondrocyte phenotype characteristic of OA severely limit the capacity for in vivo tissue regeneration. Cell- and tissue-based repair has the potential to revolutionize treatment of OA, but those approaches have exhibited limited clinical success to date. In this study, we test the hypothesis that bovine and human chondrocytes in a collagen type I scaffold will form hyaline cartilage ex vivo with immunohistochemical, biochemical, and magnetic resonance (MR) endpoints similar to the original native cartilage. Chondrocytes were isolated from 1- to 3-week-old calf knee cartilage or from cartilage obtained from human total knee arthroplasties, suspended in 2.7 mg/mL collagen I, and plated as 300 microL spot cultures with 5 x 10(6) each. Medium formulations were varied, including the amount of serum, the presence or absence of ascorbate, and treatments with cytokines. Bovine chondrocytes generated metachromatic territorial and interstitial matrix and accumulated type II collagen over time. Type VI collagen was confined primarily to the pericellular region. The ex vivo-formed bovine cartilage contained more chondroitin sulfate per dry weight than native cartilage. Human chondrocytes remained viable and generated metachromatic territorial matrix, but were unable to support interstitial matrix accumulation. MR analysis of ex vivo-formed bovine cartilage revealed evidence of progressively maturing matrix, but MR-derived indices of tissue quality did not reach those of native cartilage. We conclude that the collagen-spot culture model supports formation and maturation of three-dimensional hyaline cartilage from active bovine chondrocytes. Future studies will focus on determining the capacity of human chondrocytes to show comparable tissue formation. |
| File Format | HTM / HTML |
| ISSN | 21524947 |
| e-ISSN | 21524955 |
| DOI | 10.1089/ten.TEA.2009.0717 |
| Journal | Tissue Engineering Part A |
| Issue Number | 7 |
| Volume Number | 16 |
| Language | English |
| Publisher | Mary Ann Liebert, Inc. |
| Publisher Date | 2010-07-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Discipline Biotechnology Cartilage, Articular Metabolism Tissue Engineering Animals Drug Effects Growth & Development Cell Proliferation Collagen Type Ii Culture Media Pharmacology Cytokines Glycosaminoglycans Immunohistochemistry Magnetic Resonance Spectroscopy Research Support, N.i.h., Intramural Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
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