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Mouse embryonic fibroblast (MEF)/BMP4-conditioned medium enhanced multipotency of human dental pulp cells

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Abstract

Dental pulp cells (DPCs) are valuable cell source for dental regeneration, albeit their application is restricted by limited pluripotency due to current culture condition. Mouse embryonic fibroblasts (MEFs) are served as feeder layer to maintain undifferentiated state of iPSCs and ESCs with long-term in vitro culture. Bone morphogenetic protein 4 (BMP4) plays an important role in the regulation of undifferentiated state and lineage commitment of cells through modulation of microenvironment. However, so far little was known how micro environment affect the multipotency of dental derived cells. To demonstrate the effect of optimized culture condition on multipotency of DPCs, cell proliferation and senescence of DPCs with MEF and/or rhBMP4-CM were examined by CCK8, telomerase activity and flow cytometry. Multilineage differentiation was detected by immunofluorescent staining, Real-time PCR and western blot. Expression of BMP4/NFATc1/LIF in the co-culture medium was evaluated by ELISA and expression of Oct-4/Sox2/c-Myc/NFATc1 in co-cultured DPCs was detected by Real-time PCR. NFATc1 inhibitor INCA-6 was applied to DPCs with MEF and/or rhBMP4-CM, expression of NFATc1/Oct-4/Sox2/c-Myc was examined by Realtime PCR and western blot. Our results demonstrated that DPCs cultured with MEF and/or rhBMP4-CM showed increased cell proliferation, telomerase rate and multilineage differentiation capability. MEF-CM enhanced expression of Oct-4/Sox2/c-Myc/NFATc1 in co-cultured DPCs through secretion of BMP4/NFATc1 in the culture medium. INCA-6 effectively restrained the MEF/BMP4-CM induced upregulation of Oct-4/Sox2/c-Myc/NFATc1 in DPCs. These resuts indicate that both MEF-CM and BMP4-CM provided similar efficient culture system to improve the multipotency of DPCs, which might contribute to the application of DPCs in dental regeneration.

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Acknowledgements

The authors declare that there is no conflict of interest regarding the publication of this paper. This study was supported by National Natural Science Foundation of China (81400499/81670983).

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Authors and Affiliations

  1. Operative Dentistry and Endodontics, Guanghua School of Stomatology, Affiliated Stomatological Hospital, Guangdong Province Key Laboratory of Stomatology, Sun Yat-Sen University, 56 Lingyuan Xi Rd, Guangzhou, 510055, Guangdong, China

    Lu Liu, Zhengjun Peng, Zhezhen Xu, Haoquan Huang & Xi Wei

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  1. Lu Liu
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  2. Zhengjun Peng
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  3. Zhezhen Xu
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  4. Haoquan Huang
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  5. Xi Wei
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Correspondence to Xi Wei.

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Lu Liu and Zhengjun Peng have contributed equally as first coauthors to this study.

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Liu, L., Peng, Z., Xu, Z. et al. Mouse embryonic fibroblast (MEF)/BMP4-conditioned medium enhanced multipotency of human dental pulp cells. J Mol Hist 49, 17–26 (2018). https://doi.org/10.1007/s10735-017-9743-2

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