德克萨米他从可注射的带有多孔微球的双网络水凝中长期控制释放免疫调节促进骨再生
Weikang Xu1,2,3, Weihua Huang4,2,5, Xiayu Cai1,2
1Institute of Biological and Medical Engineering, Guangdong Academy of Sciences, No. 10 Shiliugang Road, Jianghai Avenue Central, Haizhu District, Guangzhou 510316, China.
ACS applied materials & interfaces
|July 29, 2024
概括
这项研究开发了一种新的可注射水凝平台,使用载有药物的微球来增强骨再生. 该平台展示了持续的药物释放,促进了细胞生长,并刺激了有利于骨愈合的免疫反应.
科学领域:
- 生物材料科学 生物材料科学
- 组织工程是组织工程.
- 再生医学是一种再生医学.
背景情况:
- 开发可注射,持久的骨再生平台仍然是一个挑战.
- 现有的方法缺乏可控的药物释放和最佳的免疫调节来治疗骨.
研究的目的:
- 创建一个可注射,可控制释放的水凝平台,以增强骨再生.
- 为了研究双网络水凝中含有药物的微球的骨质和免疫调节作用.
主要方法:
- 合成的多孔德克萨米他/六边形半多孔二氧化/多 (乳酸-同-葡萄糖酸) 微球 (PDHP).
- 使用甲基化丝 (SilMA) 和装有PDHP的藻酸盐 (SA) 制备了一种可注射的可光固化双网络水凝.
- 在体外评估药物释放动力学,生物相容性和骨质效应.
- 在Sprague-Dawley大鼠的头骨缺陷中评估了体内骨再生.
主要成果:
- 与对照人群相比,PDHP表现出优越的促进骨髓干细胞增殖和骨质基因分化.
- 装有PDHP的水凝提供了持续的药物释放超过4个月,并在体外48天内实现了零顺序释放.
- 在水凝中1%的微球度显著增强了骨质基因表达 (BMP-2,OPN) 和M2巨细胞两极分化.
- 在体内研究表明,PDHP/SS水凝有效促进了头骨骨缺陷愈合,血管生成和M2巨分化,同时抑制了M1巨.
结论:
- 开发的可注射水凝平台与药物装载的微球提供了一个有希望的解决方案,用于骨组织工程的长期,可控的药物输送.
- 该平台调节免疫微环境和促进血管生成的能力有助于有效地在位治疗骨.
- 这种先进的水凝系统具有重要的临床应用潜力,用于治疗骨缺陷和异常.
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