| Literature DB >> 28596582 |
Huan Liu1, Wei Zhou1, Nan Ren1, Zhihong Feng1, Yan Dong1, Shizhu Bai1, Yang Jiao2, Zhongshan Wang1, Yimin Zhao3.
Abstract
Irradiated bone has a greater risk of implant failure than nonirradiated bone. The purpose of this study was to investigate the influence of cell sheets composed of co-cultured bone marrow mesenchymal stromal cells (BMSCs) and endothelial progenitor cells (EPCs) on implant osseointegration in irradiated bone. Cell sheets (EPCs, BMSCs or co-cultured EPCs and BMSCs) were wrapped around titanium implants to make cell sheet-implant complexes. The co-cultured group showed the highest osteogenic differentiation potential in vitro, as indicated by the extracellular matrix mineralization and the expression of osteogenesis related genes at both mRNA and protein levels. The co-cultured cells promoted ectopic bone formation as indicated by micro-computed tomography (Micro-CT) and histological analysis. In the irradiated tibias of rats, implants of the co-cultured group showed enhanced osseointegration by Micro-CT evaluation and histological observation. Co-cultured EPCs and BMSCs also up-regulated the expression of osteogenesis related genes in bone fragments in close contact with implants. In conclusion, cell sheets of co-cultured EPCs and BMSCs could promote osseous healing around implants and are potentially useful to improve osseointegration process for patients after radiotherapy.Entities:
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Year: 2017 PMID: 28596582 PMCID: PMC5465198 DOI: 10.1038/s41598-017-03366-9
Source DB: PubMed Journal: Sci Rep ISSN: 2045-2322 Impact factor: 4.379