Biomedical Microdevices

, Volume 13, Issue 5, pp 837–846

Microfabricated scaffold-guided endothelial morphogenesis in three-dimensional culture

  • Yuxin Liu
  • Dmitry A. Markov
  • John P. Wikswo
  • Lisa J. McCawley
Article

Abstract

Morphogenesis is a fundamental process by which new blood vessels are formed during angiogenesis. The ability to control angiogenesis would lead to improvements in tissue engineering constructions; indeed, the study of angiogenesis has numerous clinical applications, for example, in the investigation of metastatic cancer, peripheral and coronary vascular disease, and wound healing. Conventional in vitro organotypic cell culture approaches to these studies are limited primarily by their reliance on microvascular vessel formation through a random process of morphogenesis that lacks the spatial reproducibility and orientation needed for high-throughput drug testing. We have developed a bioreactor system for scaffold-guided tubulogenesis coupled with 3-D organotypic culture to spatially control vessel formation and its orientation. To create microchannels to guide microvessel formation, we fabricated rigid scaffolds using photolithography and light curing epoxy, and soft scaffolds formed by a polydimethylsiloxane (PDMS) stamp directly into collagen. Scaffolds seeded with dermal microvascular endothelial cells were placed between gelled layers of collagen containing dermal fibroblasts within a Transwell filter system and cultured for up to 2 weeks to allow for vessel maturation. Morphological analysis of thin tissue sections following standard histology and immunohistochemical detection of endothelial cells, fibroblasts, and basement membrane confirmed vessel formation along the microchannel walls with either scaffold. This system may also provide a means to explore revascularization within decellularized extracellular matrices, the culture of microvessel networks with controlled geometries, and possibly the spatial guidance of angiogenesis for interfacing with an external microfluidic supply network. As a new tool for guided angiogenesis, our approach introduces new possibilities for identification of anti-angiogenic therapeutics.

Keywords

Primary endothelial cells Morphogenesis Engineered scaffold Bioreactor 3-D culture 

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Yuxin Liu
    • 1
  • Dmitry A. Markov
    • 2
    • 3
  • John P. Wikswo
    • 2
    • 3
    • 4
  • Lisa J. McCawley
    • 2
    • 5
  1. 1.Lane Department of Computer Science and Electrical Engineering, and WVNano InitiativeWest Virginia UniversityMorgantownUSA
  2. 2.Vanderbilt Institute for Integrative Biosystems Research and EducationVanderbilt UniversityNashvilleUSA
  3. 3.Department of Biomedical EngineeringVanderbilt UniversityNashvilleUSA
  4. 4.Departments of Molecular Physiology & Biophysics and Physics & AstronomyVanderbilt UniversityNashvilleUSA
  5. 5.Department of Cancer BiologyVanderbilt UniversityNashvilleUSA

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