Osteogenic ability of bone marrow stem cells intraoperatively enriched by a novel matrix

Ye,Qing; Chen,Kaining; Huang,Wu; He,Yunsong; Nong,Mingshan; Li,Chunxiang; Liang,Tiansen

doi:10.3892/etm.2014.2067

Osteogenic ability of bone marrow stem cells intraoperatively enriched by a novel matrix

Authors:
- Qing Ye
- Kaining Chen
- Wu Huang
- Yunsong He
- Mingshan Nong
- Chunxiang Li
- Tiansen Liang
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Affiliations: Department of Orthopedics, The General Hospital of the Armed Police Force of Guangxi, Nanning, Guangxi 530003, P.R. China, Department of Neurology, The General Hospital of the Armed Police Force of Guangxi, Nanning, Guangxi 530003, P.R. China
Published online on: November 12, 2014 https://doi.org/10.3892/etm.2014.2067
Pages: 25-32

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Abstract

Poly‑L‑lysine (PLL) is commonly used as an adhibiting agent due to its good viscosity, and demineralized bone matrix (DBM) is a common enriched matrix for selective cell retention technology. Therefore, the aim of this study was to use PLL to coat the surface and interspaces of DBM to form a novel type of enriched matrix [DBM coated with PLL (PLL‑DBM)], in order to effectively improve the enrichment effects of bone marrow stem cells and enhance their osteogenic ability. Electron microscope scanning and the infrared spectrum were used to observe the structure of PLL‑DBM and the optimal conditions for the combination of PLL and DBM. Enriching effects on bone marrow nucleated cells (NCs) and platelets (PLTs) were detected with an automated hematology analyzer. The osteogenesis of the following four groups was assessed with a grafting bone model in a goat spinal transverse process: IA, tissue engineered bone (TEB) fabricated following enrichment of bone marrow with PLL‑DBM; IB, autogenous iliac bone; IIC, TEB fabricated following enrichment of bone marrow with DBM; IID, blank DBM. The goats were sacrificed in one batch at week 16 after the surgery and the fusion specimens were examined using X‑ray and three‑dimensional computed tomography (CT). In addition, the CT value was determined and the histology and biomechanics were analyzed in order to evaluate the osteogenic ability. The results showed that PLL and DBM combined well and that PLL‑DBM exhibited a natural mesh pore structure. The fold enrichment of NCs and PLTs with PLL‑DBM was significantly higher than that with DBM. The fusion effects of the IA and IB groups were similar and significantly enhanced compared with those of the IIC and IID groups. The results confirmed that PLL‑DBM is an ideal enriched matrix for bone marrow stem cells, and TEB rapidly fabricated by PLL-DBM intraoperatively enriched bone marrow stem cells exhibits an improved osteogenic ability.

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