title: Effect of bone morphogenetic protein-4 on the expression of Sox2, Oct-4, and c-Myc in human periodontal ligament cells during long-term culture.
abstract: Recent studies demonstrated that the endogenous expression level of Sox2, Oct-4, and c-Myc is correlated with the pluripotency and successful induction of induced pluripotent stem cells. Periodontal ligament cells (PDLCs) have a multilineage differentiation capability and ability to maintain the undifferentiated stage, which makes PDLCs a suitable cell source for tissue repair and regeneration. To elucidate the effect of an in vitro culture condition on the stemness potential of PDLCs, we explored the cell growth, proliferation, cell cycle, and the expression of Sox2, Oct-4, and c-Myc in PDLCs from the passage 1 to 7 with or without the addition of recombinant human bone morphogenetic protein-4 (rhBMP4). Our results revealed that BMP-4 promoted cell growth and proliferation, arrested PDLCs in the S phase of cell cycle, and upregulated the propidium iodinate value. It was revealed that without the addition of rhBMP4, the expression of Sox2, Oct-4, and c-Myc in PDLCs only maintained the nucleus location until passage 3, and then lost the nucleus location subsequently. The mRNA expression in PDLCs further confirmed that the level of Sox2 and Oct-4 peaked at passage 3 and then decreased afterward, whereas c-Myc maintained consistently the upregulation along the passages. After the treatment with rhBMP4, the expression of Sox2, Oct-4, and c-Myc in PDLCs maintained the nucleus location even at passage 7, and the mRNA expression of Sox2 and Oct-4 significantly upregulated at the passages 5 and 7. These results demonstrated that addition of rhBMP-4 in the culture medium could improve the current culture condition for PDLCs to maintain in an undifferentiated stage.
authors: Operative Dentistry and Endodontics, Guanghua School of Stomatology, Affiliated Stomatological Hospital, Sun Yat-Sen University, Guangzhou 510055, China.
authors: Lu
authors: L
authors: Liu
authors: Xi
authors: X
authors: Wei
authors: Rong
authors: R
authors: Huang
authors: Junqi
authors: J
authors: Ling
authors: Liping
authors: L
authors: Wu
authors: Yin
authors: Y
authors: Xiao
mesh_terms: D000293:Adolescent; D000328:Adult; D055415:Bone Morphogenetic Protein 4 / Q000378:metabolism / Q000494:pharmacology*; D018929:Cell Culture Techniques; D002453:Cell Cycle; D002454:Cell Differentiation / Q000187:drug effects*; D049109:Cell Proliferation; D002478:Cells, Cultured; D002648:Child; D006801:Humans; D057026:Induced Pluripotent Stem Cells; D050814:Octamer Transcription Factor-3 / Q000096:biosynthesis / Q000235:genetics; D010513:Periodontal Ligament / Q000166:cytology* / Q000378:metabolism*; D011419:Propidium; D016271:Proto-Oncogene Proteins c-myc / Q000096:biosynthesis / Q000235:genetics; D012333:RNA, Messenger / Q000096:biosynthesis; D011994:Recombinant Proteins / Q000494:pharmacology; D012038:Regeneration / Q000187:drug effects*; D055748:SOXB1 Transcription Factors / Q000096:biosynthesis / Q000235:genetics; D055815:Young Adult
chemical_list: C525809:BMP4 protein, human; D055415:Bone Morphogenetic Protein 4; D050814:Octamer Transcription Factor-3; C494173:POU5F1 protein, human; D016271:Proto-Oncogene Proteins c-myc; D012333:RNA, Messenger; D011994:Recombinant Proteins; C527782:SOX2 protein, human; D055748:SOXB1 Transcription Factors; D011419:Propidium