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Dermatan sulphate in methoxy polyethylene glycol-polylactide-co-glycolic acid scaffolds upregulates fibronectin gene expression but has no effect on in vivo osteochondral repair

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Abstract

Purpose

The purpose of the study was to investigate the effect of dermatan sulphate (DS) addition to biodegradable methoxy polyethylene glycol (MPEG) substituted polylactide-co-glycolic acid (PLGA) scaffolds for cartilage repair in vitro and in vivo.

Methods

Human chondrocytes from eight patients undergoing anterior cruciate ligament reconstruction were isolated and cultured in 5% oxygen on MPEG-PLGA scaffolds ± DS for one, three, seven and 14 days. Analyses were performed using quantitative gene expression analysis for chondrogenic and cell attachment markers. An osteochondral drill hole defect was created in the intertrochlear groove of the distal femur in 20 New Zealand white rabbits (defects n = 20). When bleeding was observed, the defects were treated with MPEG-PLGA scaffolds ± DS. Twelve weeks after surgery the rabbits were sacrificed and the defects were analysed using histological grading with O’Driscoll scoring.

Results

DS addition to MPEG-PLGA scaffolds resulted in a significant upregulation of fibronectin gene expression on day 1. No differences were observed in chondrogenic gene expression. There were no differences between the two groups in histological grading (+DS 10.3 and −DS 9.6).

Conclusions

Upregulation of fibronectin in vitro indicating early cell-scaffold interaction and attachment did not result in improved cartilage repair in an osteochondral defect model in rabbits.

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Acknowledgements

The Danish National Advanced Technology Research Foundation financially supported the project. Coloplast A/S provided an unconditional supply of ASEED™ and dermatan sulphate-coated scaffolds. The authors would like to thank the laboratory technicians at the Orthopaedic Research Laboratory, Aarhus University Hospital, Denmark and the Institute for Clinical Medicine, Aarhus University Hospital, Skejby, Denmark for their help and cooperation.

Conflict of interest

The authors declare that they have no conflict of interest.

Author information

Authors and Affiliations

  1. Orthopaedic Research Laboratory, Aarhus University Hospital, Aarhus, Denmark

    Casper Bindzus Foldager, Cody Bünger, Anna Bay Nielsen, Michael Ulrich-Vinther & Samir Munir

  2. Institute for Clinical Medicine, Aarhus University Hospital, Skejby Sygehus, Aarhus, Denmark

    Casper Bindzus Foldager

  3. Sports Trauma Clinic, Aarhus University Hospital, Aarhus, Denmark

    Casper Bindzus Foldager & Martin Lind

  4. Coloplast A/S Incubation, Humlebæk, Denmark

    Hanne Everland

Authors
  1. Casper Bindzus Foldager
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  2. Cody Bünger
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  3. Anna Bay Nielsen
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  4. Michael Ulrich-Vinther
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  5. Samir Munir
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  6. Hanne Everland
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  7. Martin Lind
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Correspondence to Casper Bindzus Foldager.

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Foldager, C.B., Bünger, C., Nielsen, A.B. et al. Dermatan sulphate in methoxy polyethylene glycol-polylactide-co-glycolic acid scaffolds upregulates fibronectin gene expression but has no effect on in vivo osteochondral repair. International Orthopaedics (SICOT) 36, 1507–1513 (2012). https://doi.org/10.1007/s00264-011-1479-0

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  • DOI: https://doi.org/10.1007/s00264-011-1479-0

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