The role of integrin α2 in cell and matrix therapy that improves perfusion, viability and function of infarcted myocardium

Ali Ahmadi, Brian McNeill, Branka Vulesevic, Myra Kordos, Laura Mesana, Stephanie Thorn, Jennifer M. Renaud, Emily Manthorp, Drew Kuraitis, Hadi Daood Toeg, Thierry G. Mesana, Darryl R. Davis, Rob S. Beanlands, Jean N. DaSilva, Robert A. deKemp, Marc Ruel, Erik J. Suuronen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

Injectable delivery matrices hold promise in enhancing engraftment and the overall efficacy of cardiac cell therapies; however, the mechanisms responsible remain largely unknown. Here we studied the interaction of a collagen matrix with circulating angiogenic cells (CACs) in a mouse myocardial infarction model. CACs+matrix treatment enhanced CAC engraftment, and improved myocardial perfusion, viability and function compared to cells or matrix alone. Integrin-linked kinase (ILK) was up-regulated in matrix-cultured CACs. Integrin α2β1 blocking prevented ILK up-regulation, significantly reduced the adhesion, proliferation, and paracrine properties of matrix-cultured CACs, and negated the benefits of CACs+matrix therapy invivo. Furthermore, integrin α5 was essential for the angiogenic potential of CACs on matrix. These findings indicate that the synergistic therapeutic effect of CACs+matrix therapy in MI requires the matrix to enhance CAC function via α2β1 and α5 integrin signaling mechanisms, rather than simply delivering the cells.

Original languageEnglish (US)
Pages (from-to)4749-4758
Number of pages10
JournalBiomaterials
Volume35
Issue number17
DOIs
StatePublished - Jun 2014

Keywords

  • Angiogenesis
  • Cell therapy
  • Collagen
  • Integrins
  • Myocardial infarction
  • Regeneration

ASJC Scopus subject areas

  • Biophysics
  • Bioengineering
  • Ceramics and Composites
  • Biomaterials
  • Mechanics of Materials

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