BMP-2 Gene-fibronectin-apatite Composite Layer Enhances Bone Formation
Overview
Affiliations
Background: Safe and efficient gene transfer systems are needed for tissue engineering. We have developed an apatite composite layer including the bone morphogenetic protein-2 (BMP-2) gene and fibronectin (FB), and we evaluated its ability to induce bone formation.
Methods: An apatite composite layer was evaluated to determine the efficiency of gene transfer to cells cultured on it. Cells were cultured on a composite layer including the BMP-2 gene and FB, and BMP-2 gene expression, BMP-2 protein concentrations, alkaline phosphatase (ALP) activity, and osteocalcin (OC) concentrations were measured. A bone defect on the cranium of rats was treated with hydroxyapatite (HAP)-coated ceramic buttons with the apatite composite layer including the BMP-2 gene and FB (HAP-BMP-FB). The tissue concentration of BMP-2, bone formation, and the expression levels of the BMP-2, ALP, and OC genes were all quantified.
Results: The apatite composite layer provided more efficient gene transfer for the cultured cells than an apatite composite layer without FB. The BMP-2 concentration was approximately 100-600 pg/mL in the cell-culture medium. Culturing the cells on the apatite composite layer for 27 days increased ALP activity and OC concentrations. In animal experiments, the tissue concentrations of BMP-2 were over 100 pg/mg in the HAP-BMP-FB group and approximately 50 pg/mg in the control groups. Eight weeks later, bone formation was more enhanced in the HAP-BMP-FB group than in the control groups. In the tissues surrounding the HAP button, the gene expression levels of ALP and OC increased.
Conclusion: The BMP-2 gene-FB-apatite composite layer might be useful for bone engineering.
Tao Z, Yang M, Shen C J Mater Sci Mater Med. 2024; 35(1):64.
PMID: 39404912 PMC: 11480188. DOI: 10.1007/s10856-024-06803-0.
Pang K, Seo Y, Lee J J Korean Assoc Oral Maxillofac Surg. 2021; 47(6):454-464.
PMID: 34969019 PMC: 8721409. DOI: 10.5125/jkaoms.2021.47.6.454.
BMP-2 Gene Delivery-Based Bone Regeneration in Dentistry.
Park S, Kim K, Kim S, Lee Y, Seol Y Pharmaceutics. 2019; 11(8).
PMID: 31387267 PMC: 6723260. DOI: 10.3390/pharmaceutics11080393.
Fabrication of DNA-antibody-apatite composite layers for cell-targeted gene transfer.
Yazaki Y, Oyane A, Araki H, Sogo Y, Ito A, Yamazaki A Sci Technol Adv Mater. 2016; 13(6):064204.
PMID: 27877531 PMC: 5099764. DOI: 10.1088/1468-6996/13/6/064204.
When 1+1>2: Nanostructured composites for hard tissue engineering applications.
Uskokovic V Mater Sci Eng C Mater Biol Appl. 2015; 57:434-51.
PMID: 26354283 PMC: 4567690. DOI: 10.1016/j.msec.2015.07.050.