Graessel, Susanne and Rickert, Matthias and Opolka, Alfred and Bosserhoff, Anja and Angele, Peter and Grifka, Joachim and Anders, Sven (2010) Coculture between periosteal explants and articular chondrocytes induces expression of TGF-beta 1 and collagen I. RHEUMATOLOGY, 49 (2). pp. 218-230. ISSN 1462-0324,
Full text not available from this repository. (Request a copy)Abstract
periosteal-basedObjective. Repair of focal articular cartilage lesions is usually performed by employing cell-based therapeutic strategies such as autologous chondrocyte implantation (ACI). The aim of this study was to determine whether periosteum exerts pro-chondrogenic effects on the transplanted cells beyond its biomechanical role in ACI. Methods. Micromass pellets of human articular chondrocytes were cocultured for up to 28 days with human periosteal explants either with physical contact or separated by a membrane allowing paracrine interactions only. Quantitative reverse transcription (RT)-PCR, ELISA, immunohistochemistry and collagen isolation were used to analyse the expression and secretion of TGF-beta 1, collagens I and II and chondrogenic differentiation markers such as MIA (CD-RAP) and aggrecan. Results. TGF-beta 1 gene expression was induced significantly in paracrine cocultures in periosteum, whereas it was repressed in physical contact cocultures. However, a higher TGF-beta 1 secretion rate was observed in physical contact cocultures compared with periosteal monocultures. The expression of COL2A1, melanoma inhibitory activity (cartilage-derived retinoic acid-sensitive protein) [MIA (CD-RAP)] and aggrecan was mainly unaffected by culture conditions, whereas COL1A1 gene expression was increased in periosteal paracrine cocultures. Collagen I staining was induced in micromass pellets from paracrine cocultures, whereas it was repressed in chondrocytes from physical contact cocultures. Conclusions. We found evidence for a bidirectional regulating system with paracrine signalling pathways between periosteum and articular chondrocytes. Stimulation of TGF-beta 1 and COL1A1 gene expression in periosteal paracrine cocultures and the increased release of TGF-beta 1 protein in physical contact conditions indicate an anabolic, and not merely chondrogenic micro-environment in this in vitro model for periosteal-based ACI.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | GROWTH-PLATE CHONDROCYTES; MESENCHYMAL STEM-CELLS; CARTILAGE REPAIR; TGF-BETA; TRANSFORMING GROWTH-FACTOR-BETA-1; EXTRACELLULAR-MATRIX; LATENT TGF-BETA-1; TISSUE FORMATION; GENE-EXPRESSION; CHONDROGENESIS; Periosteum; Chondrocytes; Micromass pellets; Coculture; Collagen; Paracrine; TGF-beta 1 |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Orthopädie Medicine > Lehrstuhl für Pathologie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 10 Aug 2020 10:20 |
| Last Modified: | 10 Aug 2020 10:20 |
| URI: | https://pred.uni-regensburg.de/id/eprint/25274 |
Actions (login required)
 |
View Item |
