Effect of microgrooves and fibronectin conjugation on the osteoblast marker gene expression and differentiation.
- Author:
Su Jung PARK
1
;
Richard LEESUNGBOK
;
Su Jin AHN
;
Byung Jin IM
;
Do Yun LEE
;
Yu Jin JEE
;
Joon Ho YOON
;
Taixing CUI
;
Sang Cheon LEE
;
Suk Won LEE
Author Information
- Publication Type:Original Article
- Keywords: Titanium; Microgrooves; Fibronectin conjugation; Gene expression; Osteoblast differentiation
- MeSH: Alkaline Phosphatase; Calcium; Collagen Type I; Fibronectins*; Gene Expression*; Genes, vif; Humans; Mesenchymal Stromal Cells; Osteoblasts*; Real-Time Polymerase Chain Reaction; RNA, Messenger; Titanium
- From:The Journal of Advanced Prosthodontics 2015;7(6):496-505
- CountryRepublic of Korea
- Language:English
- Abstract: PURPOSE: To determine the effect of fibronectin (FN)-conjugated, microgrooved titanium (Ti) on osteoblast differentiation and gene expression in human bone marrow-derived mesenchymal stem cells (MSCs). MATERIALS AND METHODS: Photolithography was used to fabricate the microgrooved Ti, and amine functionalization (silanization) was used to immobilize fibronectin on the titanium surfaces. Osteoblast differentiation and osteoblast marker gene expression were analyzed by means of alkaline phosphatase activity assay, extracellular calcium deposition assay, and quantitative real-time PCR. RESULTS: The conjugation of fibronectin on Ti significantly increased osteoblast differentiation in MSCs compared with non-conjugated Ti substrates. On the extracellular calcium deposition assays of MSCs at 21 days, an approximately two-fold increase in calcium concentration was observed on the etched 60-microm-wide/10-microm-deep microgrooved surface with fibronectin (E60/10FN) compared with the same surface without fibronectin (E60/10), and a more than four-fold increase in calcium concentration was observed on E60/10FN compared with the non-etched control (NE0) and etched control (E0) surfaces. Through a series of analyses to determine the expression of osteoblast marker genes, a significant increase in all the marker genes except type I collagen alpha1 mRNA was seen with E60/10FN more than with any of the other groups, as compared with NE0. CONCLUSION: The FN-conjugated, microgrooved Ti substrate can provide an effective surface to promote osteoblast differentiation and osteoblast marker gene expression in MSCs.
