scholarly journals Porous bone morphogenetic protein-2 microspheres: Polymer binding and in vitro release

2001 ◽  
Vol 2 (3) ◽  
pp. 66-72 ◽  
Author(s):  
Jay A. Schrier ◽  
Patrick P. DeLuca
Keyword(s):  
Bone Morphogenetic Protein ◽  
In Vitro Release ◽  
Bone Morphogenetic Protein 2 ◽  
Morphogenetic Protein ◽  
Vitro Release

The Effect of Bone Morphogenetic Protein-2 on Rat Intervertebral Disc Cells in Vitro

Spine ◽  
2003 ◽  
Vol 28 (16) ◽  
pp. 1773-1780 ◽  
Author(s):  
S. Tim Yoon ◽  
Keun Su Kim ◽  
Jun Li ◽  
Jin Soo Park ◽  
Tomoyuki Akamaru ◽  
...  
Keyword(s):  
Intervertebral Disc ◽  
Bone Morphogenetic Protein ◽  
Bone Morphogenetic Protein 2 ◽  
Morphogenetic Protein ◽  
Disc Cells

Bone morphogenetic protein 2 controls steroid-induced osteonecrosis of the femoral head via directly inhibiting interleukin-34 expression

2021 ◽  
Author(s):  
Meng Wang ◽  
Hong Sung Min ◽  
Haojie Shan ◽  
Yiwei Lin ◽  
Wenyang Xia ◽  
...  
Keyword(s):  
Femoral Head ◽  
Bone Morphogenetic Protein ◽  
Inflammatory Responses ◽  
Gene Knockout ◽  
Osteoclast Differentiation ◽  
Bone Morphogenetic Protein 2 ◽  
Qrt Pcr ◽  
Morphogenetic Protein ◽  
Local Expression

Increased inflammatory responses is one of the major characteristics of osteonecrosis of the femoral head (ONFH). We aimed to investigate the function of bone morphogenetic protein 2 (BMP-2)/interleukin (IL)-34 axis in the inflammatory responses of ONFH. The systemic and local expression of BMPs in ONFH patients were detected by qRT-PCR and ELISA. In vitro osteoclast differentiation and ONFH mouse models, induced by 20 mg/kg methylprednisolone through intramuscular injection, were established using wild type and BMP-2-/- mice to explore the regulatory role of BMP-2 in pro-inflammatory responses and bone defects of ONFH. IL-34 expression and function were examined in vitro and in vivo through qRT-PCR, TRAP staining, and gene knockout. The systemic and local expression of BMPs were elevated in ONFH patients. BMP-2 reduced the production of pro-inflammatory cytokines and inhibited the differentiation of osteoclasts. Mechanistically, BMP-2 inhibited osteoclasts formation through suppressing IL-34 expression, and then promoted bone repair and alleviated ONFH. In conclusion, our study reveals that BMP-2 inhibits inflammatory responses and osteoclast formation through down-regulating IL-34.

scholarly journals Surface Immobilization of TiO2 Nanotubes with Bone Morphogenetic Protein-2 Synergistically Enhances Initial Preosteoblast Adhesion and Osseointegration

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Ying Li ◽  
Yunjia Song ◽  
Aobo Ma ◽  
Changyi Li
Keyword(s):  
Bone Morphogenetic Protein ◽  
Bone Morphogenetic Protein 2 ◽  
Surface Immobilization ◽  
Implant Surface ◽  
Cytoskeleton Organization ◽  
Morphogenetic Protein ◽  
Human Bone Morphogenetic Protein ◽  
Collagen Type 1

Although titanium (Ti) alloys have been widely used as implant materials, the bioinertness of pristine Ti impairs their bioactivity and early osseointegration. In the present work, we prepared TiO2 nanotubes (TNT) layer on the titanium (Ti) surface by anodic oxidation. The anodized surface was functionalized with human bone morphogenetic protein-2 coating to form the hBMP-2/TNT surface. The release behavior of hBMP-2 on the hBMP-2/TNT surface displayed a controlled and sustained pattern, compared to that on the hBMP-2/Ti surface, which showed a rapid release. In vitro cellular activity tests demonstrated that both TNT and hBMP-2/Ti surfaces, particularly the hBMP-2/TNT surface, enhanced adhesion, proliferation, and differentiation of osteoblast cells. Increased cell adhesion, improved cytoskeleton organization, and immunofluorescence staining of vinculin were observed on the modified surfaces. The TNT, hBMP-2/Ti, and hBMP-2/TNT surfaces, especially the hBMP-2/TNT surface, further displayed an upregulated gene expression of adhesion and osteogenic markers vinculin, collagen type 1, osteopontin, and osteocalcin, compared to the pristine Ti surface. In vivo experiments using a rat model demonstrated that the TNT and hBMP-2/Ti surfaces, in particular the hBMP-2/TNT surface, improved osseointegration and showed a superior bone bonding ability compared to Ti. Our study revealed a synergistic role played by TiO2 nanotubes nanotopography and hBMP-2 in promoting initial osteoblast adhesion, proliferation, differentiation, and osseointegration, thus suggesting a promising method for better modifying the implant surface.

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