Multi-gradient hydrogels produced layer by layer with capillary flow and crosslinking in open microchannels

Lab Chip. 2012 Feb 7;12(3):659-61. doi: 10.1039/c2lc20515g. Epub 2011 Dec 14.

Abstract

This technical note describes a new bench-top method for producing anisotropic hydrogels composed of gradient layers of soluble factors, particles, polymer concentrations or material properties. Each gradient layer was produced by a previous gradient method in which a droplet of one precursor solution was added to a thin layer of a second solution. The ensuing rapid capillary flow along the open channel generated a gradient precursor solution, which was then crosslinked to form a gradient gel. Repeating these steps allowed a layered gel to be iteratively constructed with as many gradient layers as desired. This technique renders the synthesis of multi-layered gradient gels accessible to virtually any researcher and should help simplify the production of more biologically relevant cellular microenvironments.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Animals
  • Anisotropy
  • Biocompatible Materials / chemical synthesis*
  • Capillaries / metabolism
  • Cellular Microenvironment
  • Cross-Linking Reagents
  • Gels
  • Hydrogels / chemical synthesis*
  • Materials Testing / methods*
  • Mice
  • NIH 3T3 Cells
  • Polymers / metabolism
  • Solutions / metabolism

Substances

  • Biocompatible Materials
  • Cross-Linking Reagents
  • Gels
  • Hydrogels
  • Polymers
  • Solutions