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Minerva Bosch-Fortea1, Alejo E Rodriguez-Fraticelli2, Gonzalo Herranz3

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This study introduces a novel micropattern device that mimics in vivo tubule formation for epithelial organ development. The device aids in predicting drug toxicity by observing cellular responses in a more physiologically relevant model.

Keywords:
Drug-developmentMicroenvironmentMicropatternsNephrotoxicityOrgan-on-achipTubulogenesis

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Area of Science:

  • Biomedical Engineering
  • Cell Biology
  • Organogenesis

Background:

  • Epithelial tubulogenesis is crucial for organ development, involving lumen formation and expansion.
  • Understanding the influence of microenvironmental cues on tubulogenesis is essential for recapitulating in vivo processes.

Purpose of the Study:

  • To engineer a micropattern-based device that recapitulates epithelial tubulogenesis in vitro.
  • To investigate the impact of microenvironmental factors on tubule formation.
  • To establish a physiologically relevant model for assessing nephrotoxicity and drug discovery.

Main Methods:

  • Development of a micropattern-based device for controlled epithelial cell culture.
  • Manipulation of microenvironmental cues including cell confinement, extracellular matrix, and substrate stiffness.
  • Culturing proximal tubule cell lines on micropatterns to assess drug transporter expression and nephrotoxicity.

Main Results:

  • The device successfully recapitulates in vivo tubule morphogenesis.
  • Tubulogenesis is significantly influenced by microenvironmental cues.
  • Proximal tubule cells cultured on micropatterns exhibit increased drug transporter expression and heightened sensitivity to nephrotoxicity.
  • Morphological defects in the engineered tubes correlate with nephrotoxicity, enabling prediction of compound toxicity.

Conclusions:

  • The micropattern device provides a powerful platform for studying organogenesis and molecular mechanisms of tubulogenesis.
  • This in vitro model offers greater physiological relevance than existing systems for drug discovery and toxicity screening.
  • The system can aid in predicting potential drug-induced nephrotoxicity during compound development.