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Cell Dome as an Evaluation Platform for Organized HepG2 Cells.

Ryotaro Kazama1, Satoshi Fujita2, Shinji Sakai1

  • 1Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan.

Cells
|January 8, 2023
PubMed
Summary

A novel 3D culture system, Cell Dome, enables direct observation of HepG2 cells under conditions mimicking tumor spheroids. This system reveals enhanced enzymatic activity and gene expression in cells cultured within the dome, offering a better model for liver cancer research.

Keywords:
3D cultureCell DomeHepG2 cellalginatecell aggregatesspheroidstissue engineering

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Area of Science:

  • Biomedical Engineering
  • Cell Biology
  • Cancer Research

Background:

  • HepG2 cells are crucial for liver and liver cancer studies.
  • Three-dimensional (3D) HepG2 spheroids offer a superior model compared to 2D cultures.
  • Observing hypoxic conditions within spheroids is vital for understanding cancer biology.

Purpose of the Study:

  • To develop and evaluate a 3D cell culture system, Cell Dome, for observing HepG2 cells.
  • To investigate the biological characteristics of HepG2 cells cultured in Cell Domes.
  • To compare the behavior of HepG2 cells in Cell Domes with traditional 2D cultures.

Main Methods:

  • HepG2 cells were cultured in a novel micro-dome system (Cell Dome) with a hydrogel shell.
  • Cell aggregates formed within 18 days and were cultured for up to 29 days.
  • Fluorescence microscopy was used to observe cells at the center of the aggregates.

Main Results:

  • HepG2 cells in Cell Domes exhibited significantly higher Pi-class Glutathione S-Transferase activity (p < 0.05).
  • Hypoxia-inducible factor-1α gene expression was elevated in Cell Dome cultures.
  • Cells cultured in Cell Domes showed increased tolerance to mitomycin C compared to 2D cultures.

Conclusions:

  • Cell Dome provides a viable 3D culture platform for HepG2 cells, mimicking spheroid environments.
  • The system allows direct observation of cells under conditions similar to spheroid centers.
  • Cell Dome is a promising tool for evaluating organized HepG2 cell behavior in liver cancer research.