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Effects of Culture Dimensions on Maintenance of Porcine Inner Cell Mass-Derived Cell Self-Renewal

  • Baek, Song (Department of Animal Life Science, Kangwon National University) ;
  • Han, Na Rae (Department of Animal Life Science, Kangwon National University) ;
  • Yun, Jung Im (Division of Animal Resource Science, Kangwon National University) ;
  • Hwang, Jae Yeon (Department of Cellular and Molecular Physiology, Yale School of Medicine) ;
  • Kim, Minseok (Animal Nutrition and Physiology Team, National Institute of Animal Science, RDA) ;
  • Park, Choon Keun (Department of Animal Life Science, Kangwon National University) ;
  • Lee, Eunsong (College of Veterinary Medicine, Kangwon National University) ;
  • Lee, Seung Tae (Department of Animal Life Science, Kangwon National University)
  • Received : 2016.09.19
  • Accepted : 2017.01.06
  • Published : 2017.02.28

Abstract

Despite the fact that porcine embryonic stem cells (ESCs) are a practical study tool, in vitro long-term maintenance of these cells is difficult in a two-dimensional (2D) microenvironment using cellular niche or extracellular matrix proteins. However, a three-dimensional (3D) microenvironment, similar to that enclosing the inner cell mass of the blastocyst, may improve in vitro maintenance of self-renewal. Accordingly, as a first step toward constructing a 3D microenvironment optimized to maintain porcine ESC self-renewal, we investigated different culture dimensions for porcine ICM-derived cells to enhance the maintenance of self-renewal. Porcine ICM-derived cells were cultured in agarose-based 3D hydrogel with self-renewal-friendly mechanics and in 2D culture plates with or without feeder cells. Subsequently, the effects of the 3D microenvironment on maintenance of self-renewal were identified by analyzing colony formation and morphology, alkaline phosphatase (AP) activity, and transcriptional and translational regulation of self-renewal-related genes. The 3D microenvironment using a 1.5% (w/v) agarose-based 3D hydrogel resulted in significantly more colonies with stereoscopic morphology, significantly improved AP activity, and increased protein expression of self-renewal-related genes compared to those in the 2D microenvironment. These results demonstrate that self-renewal of porcine ICM-derived cells can be maintained more effectively in a 3D microenvironment than in a 2D microenvironment. These results will help develop novel culture systems for ICM-derived cells derived from diverse species, which will contribute to stimulating basic and applicable studies related to ESCs.

Keywords

agarose;culture dimension;embryonic stem cells;pig;self-renewal

Acknowledgement

Supported by : Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, Forestry and Fisheries (IPET)

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