中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (2): 239-244.doi: 10.3969/j.issn.2095-4344.1511

• 药物控释材料 drug delivery materials • 上一篇    下一篇

辛伐他汀缓释微球影响骨组织工程成骨性能的体外实验

青 薇1,代彦君2,黄丽娟1,任 静1,郑佳俊1,庹 嫱2,任小华2,牟雁东1,2   

  1. 1西南医科大学口腔医学院,四川省泸州市 646000; 2电子科技大学医学院,四川省成都市 610000
  • 收稿日期:2018-10-15 出版日期:2019-01-18 发布日期:2019-01-18
  • 通讯作者: 牟雁东,博士,主任医师,西南医科大学口腔医学院,四川省泸州市 646000;电子科技大学医学院,四川省成都市 610000
  • 作者简介:青薇,女,1993年生,四川省成都市人,汉族,西南医科大学在读硕士,医师,主要从事口腔种植修复研究。
  • 基金资助:

    四川省科技厅项目(2016TD0008,项目负责人:牟雁东)

Simvastatin sustained-release microspheres promote osteogenesis of bone tissue engineering in vitro

Qing Wei1, Dai Yanjun2, Huang Lijuan1, Ren Jing1, Zheng Jiajun1, Tuo Qiang2, Ren Xiaohua2, Mu Yandong1, 2   

  1. 1School of Stomatology, Southwest Medical University, Luzhou 646000, Sichuan Province, China; 2School of Medicine, University of Electronic Science and Technology, Chengdu 610000, Sichuan Province, China
  • Received:2018-10-15 Online:2019-01-18 Published:2019-01-18
  • Contact: Mu Yandong, MD, Chief physician, School of Stomatology, Southwest Medical University, Luzhou 646000, Sichuan Province, China; School of Medicine, University of Electronic Science and Technology, Chengdu 610000, Sichuan Province, China
  • About author:Qing Wei, Master candidate, Physician, School of Stomatology, Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • Supported by:

    the Project of Sichuan Science and Technology Department, No. 2016TD0008 (to MYD)

摘要:

文章快速阅读:

 

文题释义:
羟基磷灰石:是目前最为理想的生物活性材料,为一类无机合成材料,具有生物相容性、骨传导性和骨诱导性,植入人体后对组织无刺激和排斥作用,能与骨形成很强的化学结合,用作骨缺损的充填材料,能为新骨的形成提供支架,发挥骨传导作用,是理想的硬组织替代材料。
转录组:是细胞或组织内全部的RNA转录本,可以从整体水平上反映细胞中所有基因的表达情况及其调控规律,通过高通量测序对其进行分析,并与基因组进行比对发现差异表达的基因。
辛伐他汀:呈白色粉末,几乎不溶于水,属脂溶性药物,易溶于丙酮、乙腈和乙醇等,作为3-羟基-3-甲基-戊二酰辅酶 A还原酶抑制剂他汀类家族的成员,已被证明可增加生长因子的表达,尤其是血管内皮生长因子和骨形态发生蛋白2,它们是体外和体内水平的主要血管生成和成骨调节因子。
 
 
背景:近年来国内外研究将辛伐他汀缓释微球组装在支架材料上,发现其可完成骨缺损的修复,取得不错的效果。
目的:探讨辛伐他汀缓释微球对组织工程成骨性能的影响。
方法:采用薄膜分散法制作纳米脂质体辛伐他汀缓释微球,检测其粒径和多分散系数及包封率。采用透析装置检测游离辛伐他汀溶液与辛伐他汀缓释微球溶液的缓释性能。将第3代人胎盘间充质干细胞接种于多孔羟基磷灰石陶瓷支架上,待细胞贴壁生长后分2组培养,实验组加入辛伐他汀缓释微球溶液,空白组加入普通培养基,7,14,21 d后进行转录组测序,实时荧光定量 PCR验证成骨基因表达水平。

结果与结论:①辛伐他汀缓释微球平均粒径为(77.27±6.4) nm,多分散系数为0.131±0.040,包封率为85.6%;②游离辛伐他汀溶液在前3 d迅速释放超过了总药量的80%,辛伐他汀缓释微球溶液在前3 d的药物释放量仅约40%,此后也一直较缓慢持续释放至14 d,14 d累计释放量接近80%;③转录组测序显示,实验组骨形态发生蛋白2、骨形态发生蛋白4和血管内皮生长因子等成骨相关基因富集表达;④实时荧光定量PCR检测显示,实验组7,14,21 d的骨形态发生蛋白2、骨形态发生蛋白4、血管内皮生长因子基因表达均高于空白组(P < 0.05);⑤结果表明,辛伐他汀缓释微球可促进组织工程成骨性能表达。

ORCID: 0000-0002-1627-5442(青薇)

中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程

关键词: 羟基磷灰石, 辛伐他汀, 缓释微球, 脂质体, 间充质干细胞, 骨组织工程, 转录组测序, 成骨效能, 生物材料

Abstract:

 BACKGROUND: In recent years, domestic and foreign studies have assembled simvastatin sustained-release microspheres onto scaffold materials. It has been found that simvastatin can be used to repair bone defects and good results have been obtained.

OBJECTIVE: To investigate the effect of simvastatin sustained-release microspheres on tissue engineering osteogenesis.
METHODS: Nanoliposome simvastatin sustained-release microspheres were prepared by thin-film dispersion method. The particle size, polydispersity coefficient and encapsulation efficiency were measured. The sustained release properties of free simvastatin solution and simvastatin sustained-release microsphere solution were measured by dialysis device. The third generation of human placental mesenchymal stem cells was inoculated on porous hydroxyapatite ceramic scaffolds. The cells were cultured in two groups after adherent growth. The experimental group was treated with simvastatin sustained-release microspheres, and the normal medium was added to the blank group. Transcriptome sequencing was carried out after 7, 14, 21 days. The expression levels of osteogenic genes were verified by real-time fluorescence quantitative PCR.
RESULTS AND CONCLUSION: (1) The average particle size of simvastatin sustained-release microspheres was (77.27±6.4) nm, the polydispersity coefficient was 0.131±0.040, and the encapsulation efficiency was 85.6%. (2) The rapid release of free simvastatin solution exceeded 80% total dose in the first 3 days. While the simvastatin sustained-release microsphere solution released only about 40% of the drug in the first 3 days, and had been slowly released until the 14th day, and the cumulative release at the 14th day was close to 80%. (3) Transcriptome sequencing showed that the osteogenesis-related genes such as bone morphogenetic protein 2, bone morphogenetic protein 4 and vascular endothelial growth factor were enriched and expressed in the experimental group. (4) Real-time quantitative PCR showed that the mRNA levels of bone morphogenetic protein 2, bone morphogenetic protein 4 and vascular endothelial growth factor were significantly higher in the experimental group than the blank group at 7, 14 and 21 days (P < 0.05). These results indicate that simvastatin sustained-release microspheres can promote osteogenic performance for tissue engineering. 

Key words: Hydroxyapatites, Liposomes, Tissue Engineering

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