Microfluidic alignment of collagen fibers for in vitro cell culture

Philip Lee, Rob Lin, James Moon, Luke P. Lee

Research output: Contribution to journalArticlepeer-review

188 Scopus citations

Abstract

Three dimensional gels of aligned collagen fibers were patterned in vitro using microfluidic channels. Collagen fiber orientation plays an important role in cell signaling for many tissues in vivo, but alignment has been difficult to realize in vitro. For microfluidic collagen fiber alignment, collagen solution was allowed to polymerize inside polydimethyl siloxane (PDMS) channels ranging from 10-400 μm in width. Collagen fiber orientation increased with smaller channel width, averaging 12 ± 6 degrees from parallel for channels between 10 and 100 μm in width. In these channels 20-40% of the fibers were within 5 degrees of the channel axis. Bovine aortic endothelial cells expressing GFP-tubulin were cultured on aligned collagen substrate and found to stretch in the direction of the fibers. The use of artificially aligned collagen gels could be applied to the study of cell movement, signaling, growth, and differentiation.

Original languageEnglish
Pages (from-to)35-41
Number of pages7
JournalBiomedical Microdevices
Volume8
Issue number1
DOIs
StatePublished - Mar 2006

Keywords

  • Alignment
  • Cell culture
  • Collagen
  • Microfluidic
  • PDMS

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