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Effect of basic fibroblast growth factor on pluripotent marker expression and colony forming unit capacity of stem cells isolated from human exfoliated deciduous teeth

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Abstract

Human dental pulp of exfoliated deciduous teeth contains the population of cells that exhibited mesenchymal stem cell (MSC) characters. Though, a cell amplification process is indeed required to secure an adequate cell number for such a potential employment. Several publications suggested the alteration of MSCs upon in vitro culture, for example, the decrease in proliferation and the loss of stem cell characters. Here, we investigated an influence of basic fibroblast growth factor (bFGF) on stem cells isolated from human exfoliated deciduous teeth (SHEDs) with respect to cell proliferation, colony forming unit efficiency and stem cell marker expression in both short- and long-term cultures. For short-term bFGF treatment, SHEDs were treated with bFGF for 48 h. While, in long-term bFGF supplementation, SHEDs were maintained in culture and continuous passage upon confluence in medium supplemented with bFGF. Cells at passage (P) 5 and 10 were employed for characterization. Our results showed that short-term bFGF treatment enhanced OCT4, REX1, and NANOG mRNA expression as well as colony forming unit ability. The FGFR inhibitor pretreatment was able to attenuate the influence of bFGF on pluripotent stem cell marker expression, confirming bFGF function. In addition, cells cultured in high passage number had decreased in cell proliferation, colony forming unit capacity, and pluripotent stem cell maker mRNA expression. However, bFGF supplementation in culture medium enhanced both pluripotent stem cell marker expression and colony forming unit capacity in later passage, though the effect was not robust. Together, these results indicate that high passage number may attenuate pluripotent properties of SHEDs and bFGF supplementation could be the beneficial approach to maintain SHEDs’ stemness properties.

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Acknowledgments

This study was partially supported by Research Funding, Graduate School, Chulalongkorn University, “Integrated Innovation Academic Center: IIAC” Chulalongkorn University Centernary Academic Development Project (CU56-HR07) and the Higher Education Research Promotion and National Research University Project of Thailand, Office of the Higher Education Commission (HR1166I). WS and TO were supported by DRU in Stem Cell Research Fund and Faculty of Dentistry Research Funding, Chulalongkorn University. PP was supported by the Research Chair Grant 2012, the National Science and Technology Development Agency (NSTDA), Thailand

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The authors declare that they have no conflict of interest.

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Correspondence to Waleerat Sukarawan.

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Sukarawan, W., Nowwarote, N., Kerdpon, P. et al. Effect of basic fibroblast growth factor on pluripotent marker expression and colony forming unit capacity of stem cells isolated from human exfoliated deciduous teeth. Odontology 102, 160–166 (2014). https://doi.org/10.1007/s10266-013-0124-3

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