Proliferation and odontogenic differentiation of BMP2 gene‑transfected stem cells from human tooth apical papilla: An in vitro study

Zhang,Wen; Zhang,Xiaolei; Ling,Junqi; Liu,Wei; Zhang,Xinchun; Ma,Jinglei; Zheng,Jianmao

doi:10.3892/ijmm.2014.1862

Proliferation and odontogenic differentiation of BMP2 gene‑transfected stem cells from human tooth apical papilla: An in vitro study

Authors:
- Wen Zhang
- Xiaolei Zhang
- Junqi Ling
- Wei Liu
- Xinchun Zhang
- Jinglei Ma
- Jianmao Zheng
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Affiliations: Department of Operative Dentistry and Endodontics, Guanghua School and Hospital of Stomatology and Guangdong Province Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou 510080, P.R. China
Published online on: July 24, 2014 https://doi.org/10.3892/ijmm.2014.1862
Pages: 1004-1012
Copyright: © Zhang et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 3.0].

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Abstract

Stem cells from the apical papilla (SCAP) have odontogenic potential, which plays a pivotal role in the root dentin development of permanent teeth. Human bone morphogenetic protein 2 (BMP2) is a well-known gene that participates in regulating the odontogenic differentiation of dental tissue‑derived stem cells. However, little is known regarding the effects of the BMP2 gene on the proliferation and odontogenic differentiation of SCAP. This study aimed to evaluate the odontogenic differentiation potential of lentiviral‑mediated BMP2 gene‑transfected human SCAP (SCAP/BMP2) in vitro. SCAP were isolated by enzymatic dissociation of human teeth apical papillae. The multipotential of SCAP was verified by their osteogenic and adipogenic differentiation characteristics. The phenotype of SCAP was evaluated by flow cytometry (FCM). The proliferation status of the blank vector‑transfected SCAP (SCAP/Vector) and SCAP/BMP2 was analyzed by a cell counting kit-8 (CCK‑8). Odontogenic genes, including alkaline phosphatase (ALP), osteocalcin (OCN), dentin sialophosphoprotein (DSPP) and dentin matrix protein 1 (DMP1) of the two groups of cells were evaluated by quantitative polymerase chain reaction (qPCR). ALP staining and alizarin red (AR) staining of the cells was performed on the 16th day after transfection. In vitro results of CCK-8, qPCR, ALP and AR staining demonstrated that: ⅰ) SCAP/BMP2 had a comparable proliferation rate to SCAP/Vector; ⅱ) SCAP/BMP2 presented significantly better potential to differentiate into odontoblasts compared to SCAP/Vector by upregulating ALP, OCN, DSPP and DMP1 genes; ⅲ) more ALP granules and mineralized deposits were formed by SCAP/BMP2 as compared to SCAP/Vector. The results suggested that lentiviral-mediated BMP2 gene transfection enhances the odontogenic differentiation capacity of human SCAP in vitro.

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