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http://dx.doi.org/10.14348/molcells.2017.2223

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)
Publication Information
Molecules and Cells / v.40, no.2, 2017 , pp. 117-122 More about this Journal
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;
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