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Deciphering defective amelogenesis using in vitro culture systems.

Dian Yosi Arinawati1, Keiko Miyoshi2, Ayako Tanimura2

  • 1Graduate School of Oral Sciences, Tokushima University, 3-18-15 Kuramoto, Tokushima 770-8504, Japan.

Journal of Bioscience and Bioengineering
|February 5, 2018
PubMed
Summary

Developing advanced 3D in vitro models revealed distinct gene expression differences in amelogenesis imperfecta (AI) models compared to 2D cultures, offering insights into Sp6 mutation effects.

Keywords:
Amelogenesis imperfectaCell–cell interactionCell–matrix interactionDental epithelial cellGenetic diseaseIn vitro amelogenesis imperfecta modelPhenotypic screeningSp6

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Area of Science:

  • Biotechnology
  • Developmental Biology
  • Genetics

Background:

  • Conventional 2D in vitro cultures often yield gene expression profiles that differ from in vivo samples.
  • These discrepancies can lead to misinterpretations of in vivo gene regulation.
  • A need exists for more accurate in vitro models that better mimic in vivo conditions.

Purpose of the Study:

  • To develop and compare 2D and 3D in vitro culture systems for studying gene expression.
  • To investigate the genetic basis of amelogenesis imperfecta (AI) using these systems.
  • To analyze the impact of a specificity protein 6 (Sp6) mutation on amelogenesis-related gene expression.

Main Methods:

  • Constructed 3D in vitro models using rat dental epithelial cells (ARE-B30, G5) and rat pulp cells (RPC-C2A) separated by a collagen membrane.
  • Utilized 2D culture systems with or without a collagen membrane for comparison.
  • Performed comparative gene expression analysis of amelogenesis-related genes in 2D and 3D models.

Main Results:

  • Distinct gene expression profiles were observed between 2D and 3D culture systems.
  • Bone morphogenetic protein 2 and follistatin showed reciprocal expression in control cells (G5) but not in AI-derived cells (ARE-B30).
  • Stage-specific amelogenesis-related genes exhibited differential expression patterns, highlighting phenotypic differences.

Conclusions:

  • The developed 2D and 3D in vitro culture systems can detect phenotypical differences in stage-specific amelogenesis-related gene expression.
  • Parallel analysis using both 2D and 3D systems provides a valuable platform for understanding the molecular basis of AI.
  • These models offer a more accurate approach to studying gene regulation in vivo compared to conventional 2D cultures.