Open AccessCellular responses and expression profiling of human bone marrow stromal cells stimulated with enamel matrix proteins in vitro
Author(s) -
Song Z. C.,
Shu R.,
Zhang X. L.
Publication year - 2010
Publication title -
cell proliferation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.647
H-Index - 74
eISSN - 1365-2184
pISSN - 0960-7722
DOI - 10.1111/j.1365-2184.2009.00656.x
Subject(s) - stromal cell , gene expression , cell growth , microbiology and biotechnology , microarray , microarray analysis techniques , alkaline phosphatase , cell , gene expression profiling , in vitro , biology , bone marrow , chemistry , gene , immunology , cancer research , biochemistry , enzyme
Objectives: The aim of this study was to investigate biological effects and gene expression profiles of enamel matrix proteins (EMPs), on human bone marrow stromal cells (HBMSCs), for preliminary understanding of mechanisms involved in promoting periodontal regeneration by EMPs. Materials and methods: EMPs were extracted using the acetic acid method, and HBMSCs from human bone marrow aspirates were cultured. Attachment levels, level of cells morphologically attenuated, cell proliferation, alkaline phosphatase (ALP) activity and staining of HBMSCs were measured in the absence and in the presence of EMPs. Microarray analysis was performed to detect gene profiles of HBMSCs by treatment with 200 μg/ml EMPs, for 5 days. Four differential genes were selected for validation of the microarray data using real‐time PCR. Results: EMPs promoted proliferation and ALP activity of HBMSCs in a time‐ and dose‐dependent manner, and at a concentration of 200 μg/ml significantly enhanced proliferation and ALP expression. However, there were no significant changes between EMP‐treated groups and the control group in cell attachment and cell process attenuation levels. Twenty‐seven genes were differentially expressed by HBMSCs in the presence of EMPs. Expressions of 18 genes were upregulated and expressions of nine genes were found to be downregulated. There was good consistency between data obtained from the validation group and microarray results. Conclusions: EMPs promoted cell proliferation and differentiation and gene expression profiles of HBMSCs were affected. This may help elucidation of mechanisms involved in promoting regeneration of periodontal tissues by EMPs.