Tissue engineering a tendon-bone junction with biodegradable braided scaffolds

Harshini Ramakrishna, Tieshi Li, Ting He, Joseph Temple, Martin W. King, Anna Spagnoli

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Background: Tendons play an important role in transferring stress between muscles and bones and in maintaining the stability of joints. Tendon tears are difficult to heal and are associated with high recurrence rates. So, the objective of this study was to develop a biodegradable scaffold for tendon-bone junction regeneration. Methods: Two types of polylactic acid (PLA) yarns, having fibers with round and four deep grooved cross-sections, were braided into tubular scaffolds and cultured with murine Transforming growth factor beta type II receptor (Tgfbr2)-expressing joint progenitor cells. The scaffolds were designed to mimic the mechanical, immuno-chemical and biological properties of natural mouse tendon-bone junctions. Three different tubular scaffolds measuring 2 mm in diameter were braided on a Steeger 16-spindle braiding machine and biological and mechanical performance of the three scaffolds were evaluated. Results: The mechanical test results indicated that three different braided scaffold structures provided a wide range of mechanical properties that mimic the components of tendon bone junction and results of the biological tests confirmed cell viability, active cell attachment and proliferation throughout all three scaffolds. Conclusions: This study has identified that the three proposed types of braided scaffolds with some improvement in their structures have the potential to be used as scaffolds for the regeneration of a tendon bone tissue junction.

Original languageEnglish (US)
Article number11
JournalBiomaterials Research
Volume23
Issue number1
DOIs
Publication statusPublished - May 16 2019

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Keywords

  • Biodegradable
  • Braided scaffold
  • Polylactic acid
  • Tendon bone junction
  • Tgfbr2 expressing joint progenitor cells

ASJC Scopus subject areas

  • Ceramics and Composites
  • Medicine (miscellaneous)
  • Biomaterials
  • Biomedical Engineering

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