J Gene Med:脂联素的腺病毒传递改善卵巢切除大鼠种植体周围的成骨作用

2019-01-08 MedSci MedSci原创

据报道,脂联素(APN)可促进骨形成。然而,难以利用常规方法将足够的APN施用于植入部位。该研究调查了APN转基因加速卵巢切除(OVX)大鼠种植体骨整合的效果。在体外,用重建的腺病毒(Ad-APN-EGFP)转导骨髓基质细胞(BMSC),并将破骨细胞前体RAW264.7细胞与转导的BMSCs分泌的条件培养基共培养。进行抗酒石酸酸性磷酸酶染色和骨切片吸收测定以评估破骨细胞生成的活性。在体内,在植入O

据报道,脂联素(APN)可促进骨形成。然而,难以利用常规方法将足够的APN施用于植入部位。该研究调查了APN转基因加速卵巢切除(OVX)大鼠种植体骨整合的效果。

在体外,用重建的腺病毒(Ad-APN-EGFP)转导骨髓基质细胞(BMSC),并将破骨细胞前体RAW264.7细胞与转导的BMSCs分泌的条件培养基共培养。进行抗酒石酸酸性磷酸酶染色和骨切片吸收测定以评估破骨细胞生成的活性。在体内,在植入OVX大鼠之前,将Ad-APN-EGFP施用到骨缺损中。植入后7天和28天,收获股骨并准备用于实时RT-PCR,HE染色,免疫组织化学染色,微CT分析和生物力学测试。

结果表明,破骨细胞的形成和功能在体外受到显著抑制。确认成功的转基因表达,并且在体内Ad-APN-EGFP组中检测到OCN,Runx2和ALP表达的明显增加。有趣的是,我们还发现APN的过表达降低了PPARγ2和C/EBP-α等强效脂肪形成转录因子的表达水平。植入后28天,与对照组(Ad-EGFP和PBS组)相比,Ad-APN-EGFP组显示OVX大鼠的骨整合和植体稳定性显著增加。

综上所述,该研究结果表明,通过直接腺病毒介导的基因转移的APN可以改善OVX相关骨质疏松症大鼠中钛植入物周围的骨整合。并且它可能是在骨质疏松症条件下促进骨再生的有效策略。

原始出处:

Yin G, Liu H, et al., Adenoviral delivery of adiponectin ameliorates osteogenesis around implants in ovariectomized rats. J Gene Med. 2019 Jan 3:e3069. doi: 10.1002/jgm.3069.

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    2019-08-04 cy0324
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    2019-01-09 zhaojie88
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