Human endothelial colony forming cells undergo vasculogenesis within biphasic calcium phosphate bone tissue engineering constructs

Sheeny K. Lan Levengood, Michael J. Poellmann, Sherrie G. Clark, David A. Ingram, Mervin C. Yoder, Amy J. Wagoner Johnson

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

An important consideration in bone regeneration is the need for expedited neovascularization within the defect site. Formation of a vascular network is critical for cell viability and normal function leading to tissue regeneration, but spontaneous angiogenesis is too slow to yield sufficient vessel formation. In this pilot study, human umbilical cord blood (hUCB)-derived endothelial colony forming cells (ECFCs) were evaluated for in vivo vasculogenesis in the macropores of biphasic calcium phosphate (BCP)/bone morphogenetic protein-2 (BMP-2) bone tissue engineering constructs. Constructs were implanted on the abdominal wall of NOD/SCID mice for 4 weeks. This study demonstrated in vivo vasculogenesis by human ECFCs within the macropore space of BCP/BMP-2 constructs. The human ECFC-derived vessels anastomosed with the host vasculature and perfused vessels were visible in the very center of the 5 mm diameter, 2.5 mm tall scaffolds. Additionally, the vessels were evenly distributed throughout the construct. This study suggests that scaffolds containing ECFCs have significant potential for expedited neovascularization in bony defects.

Original languageEnglish (US)
Pages (from-to)4222-4228
Number of pages7
JournalActa Biomaterialia
Volume7
Issue number12
DOIs
StatePublished - Dec 1 2011

Keywords

  • Angiogenesis and vasculogenesis
  • Bone
  • Calcium phosphate
  • Endothelial cells
  • Tissue engineering

ASJC Scopus subject areas

  • Biomaterials
  • Biomedical Engineering
  • Biotechnology
  • Biochemistry
  • Molecular Biology

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