Enzymatic formation of modular cell-instructive fibrin analogs for tissue engineering

Martin Ehrbar, Simone C. Rizzi, Ruslan Hlushchuk, Valentin Djonov, Andreas H. Zisch, Jeffrey A. Hubbell, Franz E. Weber, Matthias P. Lutolf

Research output: Contribution to journalArticlepeer-review

173 Scopus citations


The molecular engineering of cell-instructive artificial extracellular matrices is a powerful means to control cell behavior and enable complex processes of tissue formation and regeneration. This work reports on a novel method to produce such smart biomaterials by recapitulating the crosslinking chemistry and the biomolecular characteristics of the biopolymer fibrin in a synthetic analog. We use activated coagulation transglutaminase factor XIIIa for site-specific coupling of cell adhesion ligands and engineered growth factor proteins to multiarm poly(ethylene glycol) macromers that simultaneously form proteolytically sensitive hydrogel networks in the same enzyme-catalyzed reaction. Growth factor proteins are quantitatively incorporated and released upon cell-derived proteolytic degradation of the gels. Primary stromal cells can invade and proteolytically remodel these networks both in an in vitro and in vivo setting. The synthetic ease and potential to engineer their physicochemical and bioactive characteristics makes these hybrid networks true alternatives for fibrin as provisional drug delivery platforms in tissue engineering.

Original languageEnglish (US)
Pages (from-to)3856-3866
Number of pages11
Issue number26
StatePublished - Sep 2007


  • Biomimetic material
  • ECM
  • Fibrin
  • Growth factor
  • Hydrogel
  • Polyethylene glycol

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Biomedical Engineering


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