Porous hybrid structures based on P(DLLA-co-TMC) and collagen for tissue engineering of small-diameter blood vessels

L. Buttafoco, Niels P. Boks, P. Engbers-Buijtenhuijs, Dirk W. Grijpma, Andreas A. Poot, Pieter J. Dijkstra, I. Vermes, Jan Feijen

Research output: Contribution to journalArticleAcademicpeer-review

24 Citations (Scopus)
1 Downloads (Pure)

Abstract

Poly (D,L-lactide)-7co-(1,3-trimethylene carbonate) [P(DLLA-co-TMC)] (83 mol % DLLA) was used to produce matrices suitable for tissue engineering of small-diameter blood vessels. The copolymer was processed into tubular structures with a porosity of 98% by melt spinning and fiber winding, thus obviating the need of organic solvents that may compromise subsequent cell culture. Unexpectedly, incubation in culture medium at 37°C resulted in disconnection of the contact points between the polymer fibers. To improve the structural stability of these P(DLLA-co-TMC) scaffolds, a collagen microsponge was formed inside the pores of the synthetic matrix by dip coating and freeze drying. Hybrid structures with a porosity of 97% and an average pore size of 102 m were obtained. Structural stability was preserved during incubation in culture medium at 37°C. Smooth-muscle cells (SMCs) were seeded in these hybrid scaffolds and cultured under pulsatile flow conditions in a bioreactor (120 beats/min, 80-120 mmHg). After 7 days of culture in a dynamic environment viable SMCs were homogeneously distributed throughout the constructs, which were five times stronger and stiffer than noncultured scaffolds. Values for yield stress (2.8 ± 0.6 MPa), stiffness (1.6 ± 0.4 MPa), and yield strain (120% ± 20%) were comparable to those of the human artery mesenterica.
Original languageEnglish
Pages (from-to)425-434
JournalJournal of biomedical materials research. Part B: Applied biomaterials
Volume79B
Issue number2
DOIs
Publication statusPublished - 2006

Keywords

  • Tissue Engineering
  • lactate
  • melt spinning
  • trimethylene carbonate
  • METIS-236835
  • IR-67196
  • Collagen

Fingerprint Dive into the research topics of 'Porous hybrid structures based on P(DLLA-co-TMC) and collagen for tissue engineering of small-diameter blood vessels'. Together they form a unique fingerprint.

Cite this