Multiphasic microgel-in-gel materials to recapitulate cellular mesoenvironments in vitro

Biomater Sci. 2019 Dec 17;8(1):101-108. doi: 10.1039/c9bm01009b.


Multiphasic in vitro models with cross-scale heterogeneity in matrix properties and/or cellular composition can reflect the structural and compositional complexity of living tissues more faithfully, thereby creating new options for pathobiology and drug development studies. Herein, a new class of tunable microgel-in-gel materials is reported that build on a versatile platform of multifunctional poly(ethylene glycol)-heparin gel types and integrates monodisperse, cell-laden microgels within cell-laden bulk hydrogel matrices. A novel microfluidic approach was developed to enable the high-throughput fabrication of microgels of in situ adjustable diameters, stiffness, degradability and biomolecular functionalization. By choosing structure and composition of the microgel and the bulk gel compartments independently, our microgel-in-gel arrangements provide cross-scale control over tissue-mimetic features and pave the way for culture systems with designed mesoenvironmental characteristics. The potentialities of the introduced approach are exemplarily shown by creating a reductionistic in vitro model of vascularized prostate cancer tissue.

MeSH terms

  • Humans
  • Hydrogels
  • Male
  • Microfluidic Analytical Techniques / instrumentation
  • Microgels / chemistry*
  • Models, Biological
  • Prostatic Neoplasms / pathology*
  • Tissue Engineering / methods*


  • Hydrogels
  • Microgels