PMID- 29104466 OWN - NLM STAT- MEDLINE DCOM- 20180625 LR - 20181202 IS - 1449-1907 (Electronic) IS - 1449-1907 (Linking) VI - 14 IP - 11 DP - 2017 TI - The Crosstalk between HDPSCs and HUCMSCs on Proliferation and Osteogenic Genes Expression in Coculture System. PG - 1118-1129 LID - 10.7150/ijms.19814 [doi] AB - Objectives: The present study established a non-contact coculture system in vitro, aiming to investigate the crosstalk between human dental pulp stem cells (hDPSCs) and human umbilical cord mesenchymal stem cells (hUCMSCs) on proliferation activity and osteogenic genes expression through paracrine. Materials and methods: The stemness of hDPSCs and hUCMSCs were identified by flow cytometric analysis and multipotential differentiation assays. With the help of transwell inserts, the non-contact coculture system in vitro was established between hDPSCs and hUCMSCs. EdU labeling analysis and Western Blot were used to detect the proliferation activity. The mRNA and protein levels of osteogenic genes were evaluated by RT-PCR and Western Blot. The expression of elements in Akt/mTOR signaling pathway were detected by Western Blot. Results: Both hDPSCs and hUCMSCs were positive to MSCs specific surface markers and had multi-differentiation potential. The proportion of EdU-positive cells increased and the expression of CDK6 and CYCLIN A were up-regulated in cocultured hDPSCs. Both prior coculture and persistent coculture improved mRNA and protein levels of osteogenic genes in hDPSCs. While in cocultured hUCMSCs, no statistical differences were observed on proliferation and osteogenesis. The phosphorylation of Akt and mTOR was up-regulated in cocultured hDPSCs. Conclusions: The crosstalk between hDPSCs and hUCMSCs in coculture system increased the proliferation activity and enhanced osteogenic genes expression in hDPSCs. Akt/mTOR signaling pathway might take part in the enhancing effects in both cell proliferation and gene expression. FAU - Jia, Linglu AU - Jia L AD - School of Stomatology, Shandong University, Jinan, China. AD - Shandong provincial key laboratory of oral tissue regeneration, Jinan, China. FAU - Gu, Weiting AU - Gu W AD - Qilu hospital of Shandong University, Jinan, China. FAU - Zhang, Yunpeng AU - Zhang Y AD - School of Stomatology, Shandong University, Jinan, China. AD - Shandong provincial key laboratory of oral tissue regeneration, Jinan, China. FAU - Ji, Yawen AU - Ji Y AD - School of Stomatology, Shandong University, Jinan, China. AD - Shandong provincial key laboratory of oral tissue regeneration, Jinan, China. FAU - Liang, Jin AU - Liang J AD - School of Stomatology, Shandong University, Jinan, China. AD - Shandong provincial key laboratory of oral tissue regeneration, Jinan, China. FAU - Wen, Yong AU - Wen Y AD - School of Stomatology, Shandong University, Jinan, China. AD - Shandong provincial key laboratory of oral tissue regeneration, Jinan, China. FAU - Xu, Xin AU - Xu X AD - School of Stomatology, Shandong University, Jinan, China. AD - Shandong provincial key laboratory of oral tissue regeneration, Jinan, China. LA - eng PT - Journal Article DEP - 20170904 PL - Australia TA - Int J Med Sci JT - International journal of medical sciences JID - 101213954 SB - IM MH - Blotting, Western MH - Cell Differentiation/physiology MH - Cell Proliferation/physiology MH - Coculture Techniques/*methods MH - Dental Pulp/cytology/metabolism MH - Flow Cytometry MH - Humans MH - Mesenchymal Stem Cells/cytology/metabolism MH - Osteogenesis/drug effects PMC - PMC5666543 OTO - NOTNLM OT - crosstalk. OT - human dental pulp stem cells OT - human umbilical cord mesenchymal stem cells OT - osteogenesis OT - proliferation COIS- Competing Interests: The authors have declared that no competing interest exists. EDAT- 2017/11/07 06:00 MHDA- 2018/06/26 06:00 PMCR- 2017/01/01 CRDT- 2017/11/07 06:00 PHST- 2017/02/26 00:00 [received] PHST- 2017/06/19 00:00 [accepted] PHST- 2017/11/07 06:00 [entrez] PHST- 2017/11/07 06:00 [pubmed] PHST- 2018/06/26 06:00 [medline] PHST- 2017/01/01 00:00 [pmc-release] AID - ijmsv14p1118 [pii] AID - 10.7150/ijms.19814 [doi] PST - epublish SO - Int J Med Sci. 2017 Sep 4;14(11):1118-1129. doi: 10.7150/ijms.19814. eCollection 2017.