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Special AT-rich sequence-binding protein 2 and its related genes play key roles in the differentiation of MC3T3-E1 osteoblast like cells
Authors:Kim In-Suk  Jeong Soo-Jin  Kim Sun-Hee  Jung Ji Hoon  Park Young Guk  Kim Sung-Hoon
Institution:Department of Orthodontics, Kyung-Hee University College of Dental Medicine, Seoul 130-701, Republic of Korea.
Abstract:Special AT-rich sequence-binding protein (SATB) plays a critical role in bone generation and osteoblast differentiation. In the present study, the differentially expressed genes by SATB2 overexpression were analyzed in MC3T3-E1 osteoblast-like cells using Alizarin red S staining, wound healing assay and Agilent's Human Oligo Microarray. Calcium mineralization and motility were significantly enhanced in SATB2-overexpressed cells compared with untreated control. In addition, using the GeneSpringGX 7.3 program to compare the identified genes expressed in SATB2-overexpresed cells with untreated control, we found several unique genes closely associated with osteoblast differentiation, including SOX2, MBP2, WNT11 and MEN1 (up-regulated genes), and ILK, FGF23, FGFR2, and SNAI1 (down-regulated genes). Consistent with microarray data, real-time RT-PCR confirmed the significant up- and down-regulation of these genes at mRNA level in SATB2-overexpressed MC3T3-E1 cells. Overall, our findings suggest that the molecular regulation of SATB2 can be an attractive approach to develop a novel therapeutic strategy for bone-related diseases.
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