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首页> 外文期刊>Growth Factors >Systemically delivered insulin-like growth factor-I enhances mesenchymal stem cell-dependent fracture healing
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Systemically delivered insulin-like growth factor-I enhances mesenchymal stem cell-dependent fracture healing

机译:全身递送胰岛素样生长因子-I增强间充质干细胞依赖性骨折愈合

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摘要

In this study, we examined the effectiveness of systemic subcutaneous delivery of recombinant Insulin-like growth factor (IGF)-I concurrently with primary cultured bone marrow-derived mesenchymal stem cell (MSC) transplant on fracture repair. We found that the fracture callus volume increased in mice with a stabilized tibia fracture that received IGF-IMSC when compared with that in either untreated or MSC alone treated mice. In evaluating the callus tissue components, we found that the soft and new bone tissue volumes were significantly increased in IGF-IMSC recipients. Histological and in-situ hybridization analyses confirmed a characteristic increase of newly forming bone in IGF-IMSC recipients and that healing progressed mostly through endochondral ossification. The increase in soft and new bone tissue volumes correlated with increased force and toughness as determined by biomechanical testing. In conclusion, MSC transplant concurrent with systemic delivery of IGF-I improves fracture repair suggesting that IGF-IMSC could be a novel therapeutic approach in patients who have inadequate fracture repair.
机译:在这项研究中,我们检查了重组胰岛素样生长因子(IGF)-I与原代培养的骨髓间充质干细胞(MSC)移植同时全身皮下递送对骨折修复的有效性。我们发现,与未经治疗或仅由MSC治疗的小鼠相比,接受IGF-IMSC的稳定胫骨骨折小鼠的骨折骨call体积增加。在评估愈伤组织成分时,我们发现IGF-IMSC接受者的软组织和新骨组织体积显着增加。组织学和原位杂交分析证实了IGF-IMSC受体中新形成的骨骼的特征性增加,并且愈合主要通过软骨内骨化进行。通过生物力学测试确定,软组织和新骨组织体积的增加与力和韧性的增加相关。总之,MSC移植与IGF-I的全身递送同时改善了骨折的修复,提示IGF-IMSC可能是骨折修复不足的患者的一种新型治疗方法。

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