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首页> 外文期刊>Journal of orthopaedic research >Effect of age and sampling site on the chondro-osteogenic potential of rabbit marrow-derived mesenchymal progenitor cells.
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Effect of age and sampling site on the chondro-osteogenic potential of rabbit marrow-derived mesenchymal progenitor cells.

机译:年龄和采样位置对兔骨髓间充质祖细胞软骨成骨潜能的影响。

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摘要

Four sequential bone-marrow aspirations from the ipsilateral tibia and iliac crest of New Zealand White rabbits, aged 4 months or 1, 2, or 3 years, were assayed in vitro and in vivo for their chondro-osteogenic potential. Nonhematopoietic cells from the samples of bone marrow were isolated and expanded in culture; their colony-forming efficiency was determined, and second-passage marrow-derived cells, referred to as mesenchymal progenitor cells, were loaded into porous calcium-phosphate ceramic cubes as carrier vehicles for an in vivo cartilage and bone-formation assay. The cubes were placed subcutaneously in nude BALB/C mice for 3 and 6 weeks. On histological examination, the cubes were scored for the presence of bone and cartilage in their pores, and average values for age groups and location were compared. At aspiration, the samples from the iliac crest exhibited an overall reduction in cell concentration with increasing age, and at the first harvest time, they showed a decrease in colony-forming efficiency and cube score with increasing age. This study demonstrated that repeated bone-marrow aspirations may be performed and may have an enhancing effect on the osteochondral progenitor cells of older animals.
机译:在体外和体内测定了4个月或1、2或3岁的新西兰白兔同侧胫骨和的四次连续骨髓抽吸的软骨成骨潜力。从骨髓样品中分离出非造血细胞,并在培养中扩增。确定它们的集落形成效率,然后将第二代骨髓来源的细胞(称为间充质祖细胞)装载到多孔磷酸钙陶瓷立方体中,作为体内软骨和骨形成测定的载体。将这些方块皮下放置在裸BALB / C小鼠中3和6周。在组织学检查中,对立方体的毛孔中骨骼和软骨的存在进行评分,并比较年龄组和位置的平均值。抽吸时,from的样品随着年龄的增长而总体上显示出细胞浓度的总体下降,而在第一次收获时,随着年龄的增长,它们的菌落形成效率和立方体得分下降。这项研究表明,可以重复进行骨髓穿刺术,并且可以对老年动物的骨软骨祖细胞产生增强作用。

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