中国组织工程研究 ›› 2024, Vol. 28 ›› Issue (10): 1568-1574.doi: 10.12307/2024.363

• 水凝胶材料Hydrogel materials • 上一篇    下一篇

载雷奈酸锶海藻酸钠/胶原水凝胶促进骨性关节炎骨缺损的修复

苏坤阳,陈毕能,陈益樑,金少枫   

  1. 中国人民解放军联勤保障部队第九一〇医院(泉州市海峡医院)中医康复科,福建省泉州市  362000
  • 收稿日期:2023-04-04 接受日期:2023-05-25 出版日期:2024-04-08 发布日期:2023-08-19
  • 通讯作者: 金少枫,主管治疗师,中国人民解放军联勤保障部队第九一〇医院(泉州市海峡医院)中医康复科,福建省泉州市362000
  • 作者简介:苏坤阳,男,1987年生,福建省泉州市人,汉族,主管治疗师,主要从事骨科康复方向的研究。

Strontium ranelate-loaded sodium alginate/collagen hydrogel promotes bone defect repair in osteoarthritis

Su Kunyang, Chen Bineng, Chen Yiliang, Jin Shaofeng   

  1. Department of Traditional Chinese Medicine Rehabilitation, 910 Hospital of Chinese People's Liberation Army Joint Logistics Support Force (Quanzhou Strait Hospital), Quanzhou 362000, Fujian Province, China
  • Received:2023-04-04 Accepted:2023-05-25 Online:2024-04-08 Published:2023-08-19
  • Contact: Jin Shaofeng, Supervisor therapist, Department of Traditional Chinese Medicine Rehabilitation, 910 Hospital of Chinese People's Liberation Army Joint Logistics Support Force (Quanzhou Strait Hospital), Quanzhou 362000, Fujian Province, China
  • About author:Su Kunyang, Supervisor therapist, Department of Traditional Chinese Medicine Rehabilitation, 910 Hospital of Chinese People's Liberation Army Joint Logistics Support Force (Quanzhou Strait Hospital), Quanzhou 362000, Fujian Province, China

摘要:


文题释义:

雷奈酸锶:是一种具有抑制破骨、调控成骨作用的功能性药物。近年来的研究显示,雷奈酸锶可以促进软骨分化,从而调控软骨的修复,因此其在骨性关节炎的治疗中展现了巨大的潜力。
药物递送系统:是指通过将药物搭载于生物材料中来构建一种能够使药物在时空及剂量上在疾病部位特异性分布的体系,其可在疾病部位持续释放治疗药物,显著提高药物的生物利用度,减少毒副作用、用药次数,增强治疗效果。


背景:软骨退行性变和软骨下骨损伤是骨性关节炎的主要病理特征,根据这一病理特征进行局部调控将是骨性关节炎治疗的有前景改进方案。

目的:设计并研究一种可注射载雷奈酸锶药物递送系统,观察其在骨性关节炎局部促进软骨修复并改善软骨下骨结构的治疗效果。
方法:①体外实验:将雷奈酸锶搭载于海藻酸钠/胶原水凝胶基质中构建原位药物递送系统,表征该系统的体外缓释性能。将载雷奈酸锶海藻酸钠/胶原水凝胶(实验组)、海藻酸钠/胶原水凝胶(对照组)分别与骨髓间充质干细胞共培养,以单独培养的细胞为空白对照组,检测细胞增殖活性;在成软骨诱导分化后,分别进行番红O染色、阿利新蓝染色及RT-qPCR检测。将两种水凝胶分别与成骨细胞共培养,以单独培养的细胞为空白对照组,进行免疫荧光染色及RT-qPCR检测。②体内实验:取18只成年SD大鼠,通过内侧半月板切除的方法建立右后侧膝骨性关节炎模型,造模后1周,采用随机数字表法分3组处理:空白组不进行任何处理,对照组膝关节腔内注射海藻酸钠/胶原水凝胶,实验组右膝关节腔内注射载雷奈酸锶海藻酸钠/胶原水凝胶,每组6只。造模后第6周取材,分别进行Micro-CT扫描、苏木精-伊红染色、番红O染色及免疫荧光染色。

结果与结论:①体外实验:载雷奈酸锶海藻酸钠/胶原水凝胶具有疏松多孔的微观结构,可持续释放雷奈酸锶,至21 d时累计释放量(60.89±0.58)%。骨髓间充质干细胞活死染色显示,两种水凝胶均具有良好的细胞相容性。CCK-8检测显示,载雷奈酸锶海藻酸钠/胶原水凝胶可促进骨髓间充质干细胞的增殖;番红O染色、阿利新蓝染色、免疫荧光染色及RT-qPCR检测显示,载雷奈酸锶海藻酸钠/胶原水凝胶可促进骨髓间充质干细胞的成软骨分化。免疫荧光染色及RT-qPCR检测显示,载雷奈酸锶海藻酸钠/胶原水凝胶可通过增加骨保护素/核因子κB受体活化因子配体比值而降低骨吸收活性。②体内实验:Micro-CT扫描显示,与空白组、对照组比较,实验组大鼠膝关节软骨下骨骨体积分数与骨密度升高(P < 0.05,P < 0.01)。组织学染色显示,与空白组、对照组比较,实验组大鼠膝关节软骨损伤明显减轻,促进Ⅱ型胶原蛋白的表达、抑制基质金属蛋白酶2蛋白的表达(P < 0.05,P < 0.01)。③结果表明:载雷奈酸锶海藻酸钠/胶原水凝胶能促进骨性关节炎软骨缺损的修复、重建软骨和软骨下骨之间的复杂界面。

https://orcid.org/0009-0000-0346-401X(苏坤阳)

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: 骨关节炎, 药物递送系统, 海藻酸钠/胶原水凝胶, 雷奈酸锶, 软骨下骨, 软骨修复

Abstract: BACKGROUND: Cartilage degeneration and subchondral bone damage are the main pathological features of osteoarthritis, and treatment based on this pathological feature will be a promising improvement for osteoarthritis.
OBJECTIVE: To design and study an annotated strontium ranelate-loaded drug delivery system and to observe its therapeutic effect on promoting cartilage repair and improving subchondral bone structure in osteoarthritis. 
METHODS: (1) In vitro experiment: Strontium ranelate was loaded into sodium alginate/collagen hydrogel matrix to construct in situ drug delivery system, and the in vitro slow release performance of the system was characterized. Strontium ranelate-loaded sodium alginate/collagen hydrogel (experimental group) and alginate sodium/collagen hydrogel (control group) were co-cultured with bone marrow mesenchymal stem cells, respectively, and cultured cells were used as a blank control group to detect cell proliferative activity. After chondroblast-induced differentiation, saffron O staining, Alcian blue staining and RT-qPCR were performed respectively. The two hydrogels were co-cultured with osteoblasts, and the cultured cells were used as a blank control group for immunofluorescence staining and RT-qPCR. (2) In vivo experiment: A total of 18 adult SD rats were selected and the model of right posterior knee osteoarthritis was established by the method of medial meniscectomy. After 1 week, the rats were divided into three groups by the random number table method: The blank group did not receive any treatment. The control group was injected with sodium alginate/collagen hydrogel in the knee, and the experimental group was injected with strontium ranelate-loaded sodium alginate/collagen hydrogel, with 6 rats in each group. After 6 weeks, the samples were subjected to Micro-CT scanning, hematoxylin-eosin staining, saffron O-solid green staining and immunofluorescence staining.
RESULTS AND CONCLUSION: (1) In vitro experiment: Strontium ranelate-loaded sodium alginate/collagen hydrogel had porous microstructure and sustainable release of strontium ranelate. At 21 days, the cumulative release reached (60.89±0.58)%. Bone marrow mesenchymal stem cell staining showed that both hydrogels had good cytocompatibility. The results of the CCK-8 assay demonstrated that strontium ranelate-loaded sodium alginate/collagen hydrogel could promote the proliferation of bone marrow mesenchymal stem cells. The results of Safranin O staining, Alcian blue staining, immunofluorescence staining and RT-qPCR exhibited that strontium ranelate-loaded sodium alginate/collagen hydrogel could promote chondrogenic differentiation of bone marrow mesenchymal stem cells. Immunofluorescence staining and RT-qPCR revealed that strontium ranelate-loaded sodium alginate/collagen hydrogel could decrease bone resorptivity by increasing the ratio of osteophosphorin/nuclear factor κB receptor activator ligand. (2) In vivo experiment: Micro-CT scan verified that compared with the blank group and control group, the subchondral bone volume fraction and bone mineral density of the knee of rats were increased in the experimental group (P < 0.05, P < 0.01). Histological staining displayed that compared with the blank group and control group, the knee cartilage injury was significantly reduced; the expression of type II collagen was promoted, and the expression of matrix metalloproteinase 2 protein was inhibited in the experimental group (P < 0.05, P < 0.01). (3) These results confirm that the strontium ranelate-loaded sodium alginate/collagen hydrogel can promote the repair of cartilage defects in osteoarthritis and reconstruct the complex interface between cartilage and subchondral bone.

Key words: osteoarthritis, drug delivery system, sodium alginate/collagen hydrogel, strontium ranelate, subchondral bone, cartilage repair

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