在ex-in vivo和in vivo研究中评估生物活性的可行的低骨密度条件
William Phillip Pereira DA Silva1, Leonardo Alan Delanora1, Barbara Ribeiro Rios1
1Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Diagnóstico e Cirurgia, São Paulo, Brasil.
Journal of applied oral science : revista FOB
|July 12, 2023
概括
与卵巢切除的老鼠相比,老老鼠在植入植入研究中表现出更为关键的骨状况. 这种老年模型增强了对生物材料特性和骨修复中的地形变化的调查.
科学领域:
- 生物材料科学 生物材料科学
- 整形外科的研究研究.
- 再生医学是一种再生医学.
背景情况:
- 骨修复对于骨科植入物成功至关重要.
- 衰老和雌激素缺乏对骨健康和愈合有重大影响.
- 选择合适的动物模型对于准确的骨修研究至关重要.
研究的目的:
- 为了比较老年老鼠 (SENIL) 和年轻的卵巢切除老鼠 (OXV) 作为骨修复评估的关键动物模型.
- 为了确定哪种模型更好地反映了损害骨状况,用于评估生物材料.
主要方法:
- 骨髓介质干细胞 (MSC) 的活体分析,以检测活力,基因表达,性酸酶活性和矿化.
- 在体内评估骨修复使用植入物在骨代谢用于测量组织学,微图,生物力学测试 (逆扭矩) 和共聚焦显微镜.
主要成果:
- 与卵巢切除的老鼠相比,老老鼠的MSC活力降低,基因表达改变,性酸酶活性降低,矿化减少.
- 在体内,老年老鼠表现出较差的组织学参数,生物力学强度降低,骨结构脆弱.
- 微观扫描结果在各组之间相似,而老年老鼠的组织测量显著下降.
结论:
- 老年老鼠模型呈现出更为关键的骨状况,使其成为研究植入物安装的骨修复的优势.
- 这种模型有助于对生物材料的有效性和地形修改对骨愈合的影响进行更强大的评估.
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