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Enhanced osseointegration of titanium implant through the local delivery of transcription factor SATB2

Paper ID Volume ID Publish Year Pages File Format Full-Text
7260 542 2011 8 PDF Available
Title
Enhanced osseointegration of titanium implant through the local delivery of transcription factor SATB2
Abstract

Titanium implants are widely used in dentistry and orthopedic surgery. Nevertheless, bone regeneration around the implant is a relatively slow process, after placement. This study assessed whether SATB2 can enhance osseointegration of a titanium implant. To determine the effect of SATB2 in implant integration, two different viruses encoding SATB2 (PBABE-Satb2 virus or RCAS-Satb2 virus) were locally administered to the bone defect prior to titanium implant placement in our established transgenic TVA mice. Seven and 21 days post implantation, the femurs were isolated for quantitative real-time RT-PCR, H&E staining, immunohistochemical (IHC) staining, and microcomputed tomography (microCT) analysis. Quantitative real-time RT-PCR results demonstrated that the in vivo overexpression of SATB2 enhanced expression levels of potent osteogenic transcription factors and bone matrix proteins. We also found that 21 days after implantation, there were no significant differences in the expression levels of SATB2, Osx, Runx2, COLI, OC, and BSP between the RCAS-Satb2 group and the RCAS group. Histological analysis showed that SATB2 overexpression significantly enhanced new bone formation and bone-to-implant contact after implantation. IHC staining analysis revealed that forced expression of SATB2 increased the number of BSP-positive cells surrounding the implant. MicroCT analysis demonstrated that in vivo overexpression of SATB2 significantly increased the density of the newly formed bone surrounding the implant. These results conclude that in vivo overexpression of SATB2 significantly accelerates osseointegration of titanium implants and SATB2 can serve as a potent molecule in promoting tissue regeneration.

Keywords
Implant; SATB2; Osseointegration; TVA mice
First Page Preview
Enhanced osseointegration of titanium implant through the local delivery of transcription factor SATB2
Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 32, Issue 33, November 2011, Pages 8676–8683
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering