中国组织工程研究 ›› 2026, Vol. 30 ›› Issue (32): 8443-8453.doi: 10.12307/2025.876

• 材料生物相容性 material biocompatibility • 上一篇    下一篇

锰掺杂羟基磷灰石/聚多巴胺复合材料的表征及生物学性能

余启明,狄静怿,张  昊,陈纪龙,肖  辉,胡图强   

  1. 十堰市人民医院(湖北医药学院附属人民医院)口腔科,湖北省十堰市  442000
  • 接受日期:2026-02-04 出版日期:2026-11-18 发布日期:2026-04-27
  • 通讯作者: 胡图强,医学博士,主任医师,十堰市人民医院(湖北医药学院附属人民医院)口腔科,湖北省十堰市 442000
  • 作者简介:余启明,男,1999年生,湖北省仙桃市人,汉族,在读硕士,医师,主要从事口腔种植学研究。
  • 基金资助:
    湖北省卫生健康科研基金项目(WJ2021M054),项目参与人:余启明;湖北医药学院研究生科技创新项目(YC2024061),项目负责人:余启明

Characterization and biological performance of manganese-doped hydroxyapatite/polydopamine composite materials

Yu Qiming, Di Jingyi, Zhang Hao, Chen Jilong, Xiao Hui, Hu Tuqiang   

  1. Department of Stomatology, Shiyan Renmin Hospital (Affiliated Renmin Hospital of Hubei University of Medicine), Shiyan 442000, Hubei Province, China
  • Accepted:2026-02-04 Online:2026-11-18 Published:2026-04-27
  • Contact: Hu Tuqiang, MD, Chief physician, Department of Stomatology, Shiyan Renmin Hospital (Affiliated Renmin Hospital of Hubei University of Medicine), Shiyan 442000, Hubei Province, China
  • About author:Yu Qiming, MS candidate, Physician, Department of Stomatology, Shiyan Renmin Hospital (Affiliated Renmin Hospital of Hubei University of Medicine), Shiyan 442000, Hubei Province, China
  • Supported by:
    Hubei Provincial Health Research Fund, No. WJ2021M054 (to YQM); Graduate Science and Technology Innovation Project of Hubei University of Medicine, No. YC2024061 (to YQM)

摘要:

文题释义:
羟基磷灰石:是一种天然磷灰石矿物,是人体和动物骨骼的主要无机成分,具有良好的生物相容性,能够和机体组织实现化学结合,促进缺损组织的修复。
聚多巴胺:是一种由多巴胺在弱碱性有氧环境下通过氧化自聚合反应形成的聚合物,因良好的表面附着能力和化学稳定性被广泛应用于材料改性领域。

背景:羟基磷灰石因优良的骨传导性能被广泛用于骨组织工程,但骨诱导性能不足限制其修复效果,导致临床应用受限。
目的:构建锰掺杂羟基磷灰石/聚多巴胺复合骨充填材料,表征材料的理化性能及生物学性能。
方法:①以Ca(NO₃)₂·4H₂O作为钙源,(NH4)2HPO4作为磷源,硝酸锰溶液作为锰源,按照锰/(钙+锰)的摩尔比分别为5%,10%,15%,采用水热均相共沉淀法制备锰掺杂羟基磷灰石,对应的材料分别记为5Mn-HA、10Mn-HA、15Mn-HA;将羟基磷灰石与3种锰掺杂羟基磷灰石材料分别浸入盐酸多巴胺-Tris缓冲溶液中,制备锰掺杂羟基磷灰石/聚多巴胺复合材料,对应的材料分别记为HA/PDA、5Mn-HA/PDA、10Mn-HA/
PDA、15Mn-HA/PDA,表征材料的形貌,检测材料锰离子释放量、降解速率与细胞相容性。选择细胞相容性较好的锰掺杂材料进行后续实验。②将羟基磷灰石、HA/PDA、5Mn-HA、5Mn-HA/PDA分别与大鼠骨髓间充质干细胞共培养,成骨诱导后进行碱性磷酸酶活性检测与茜素红S染色,q-PCR检测Runx2和骨钙素mRNA表达。③在24只SD大鼠颅顶两侧各制作1个直径5 mm的圆形全层骨缺损,右侧骨缺损处分别植入羟基磷灰石、HA/PDA、5Mn-HA、5Mn-HA/PDA,每种材料6只大鼠,左侧骨缺损处不植入材料(空白对照)。术后第4,8周取材,进行Micro-CT扫描、苏木精-伊红与Masson染色。
结果与结论:①锰掺杂羟基磷灰石/聚多巴胺复合材料呈微球状,粒径分布在9.86-13 μm范围内。随着锰掺杂量的增加,材料中锰离子释放量增加,并且锰掺杂羟基磷灰石/聚多巴胺复合材料的锰离子释放速率低于对应的锰掺杂羟基磷灰石材料,与锰掺杂羟基磷灰石材料相比,锰掺杂羟基磷灰石/聚多巴胺复合材料展现出更快的降解速率。综合大鼠骨髓间充质干细胞活死染色与CCK-8检测结果,5Mn-HA无明显的细胞毒性,因此选取以 5Mn-HA组及5Mn-HA/PDA 组作为后续成骨功能评估与体内验证的核心体系。②综合碱性磷酸酶活性检测、茜素红S染色与q-PCR检测结果,5Mn-HA/PDA的促成骨能力强于其余3种材料。③Micro-CT扫描显示,空白对照组骨修复速度最慢、新生骨量最少,5Mn-HA/PDA组骨修复速度最快、新生骨量最多。苏木精-伊红与Masson染色进一步印证了Micro-CT扫描结果。④结果表明,锰掺杂羟基磷灰石/聚多巴胺复合材料具有良好的理化性能与生物学性能。
https://orcid.org/0009-0009-2978-0518(余启明)

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: 骨再生, 羟基磷灰石微球, 聚多巴胺, 锰离子, 金属离子, 骨缺损修复

Abstract: BACKGROUND: Hydroxyapatite is widely used in bone tissue engineering due to its excellent osteoconductivity. However, its limited osteoinductivity restricts its clinical application and therapeutic efficacy.
OBJECTIVE: To prepare novel manganese-doped hydroxyapatite/polydopamine (Mn-HA/PDA) composite bone graft materials and characterize their physicochemical and biological properties.
METHODS: (1) Using Ca(NO₃)₂·4H₂O as the calcium source, (NH4)2HPO4 as the phosphorus source, and manganese nitrate solution as the manganese source, manganese-doped hydroxyapatite was prepared by hydrothermal homogeneous coprecipitation with manganese/(calcium+manganese) molar ratios of 5%, 10%, and 15%, respectively. The corresponding materials were denoted as 5Mn-HA, 10Mn-HA, and 15Mn-HA. Hydroxyapatite and the three manganese-doped hydroxyapatite materials were immersed in dopamine hydrochloride-Tris buffer solution to prepare manganese-doped hydroxyapatite/polydopamine composite materials, denoted as HA/PDA, 5Mn-HA/PDA, 10Mn-HA/PDA, and 15Mn-HA/PDA, respectively. The morphology, manganese ion release, degradation rate, and cell compatibility of the materials were characterized. The manganese-doped material with better cell compatibility was selected for subsequent experiments. (2) Hydroxyapatite, HA/PDA, 5Mn-HA, and 5Mn-HA/PDA were co-cultured with rat bone marrow mesenchymal stem cells. After osteogenic induction, alkaline phosphatase activity detection and Alizarin Red S staining were performed, and Runx2 and osteocalcin mRNA expression levels were detected by q-PCR. (3) A 5 mm diameter full-thickness circular bone defect was created on both sides of the skull of 24 SD rats. Hydroxyapatite, HA/PDA, 5Mn-HA, and 5Mn-HA/PDA were implanted into the right bone defect (6 rats per material), while the left bone defect was untreated (blank control). Samples were collected at 4 and 8 weeks post-surgery for Micro-CT scanning, hematoxylin-eosin staining, and Masson staining.
RESULTS AND CONCLUSION: (1) The manganese-doped hydroxyapatite/polydopamine composite material exhibited a microsphere morphology with a particle size distribution ranging from 9.86 to 13 μm. With increasing manganese doping concentration, the release of manganese ions from the material increased, and the manganese ion release rate of the manganese-doped hydroxyapatite/polydopamine composite material was lower than that of the corresponding manganese-doped hydroxyapatite material. Compared with manganese-doped hydroxyapatite, the manganese-doped hydroxyapatite/polydopamine composite exhibited a faster degradation rate. Based on the results of live/dead cell staining and CCK-8 assay of rat bone marrow mesenchymal stem cells, 5Mn-HA showed no significant cytotoxicity; therefore, 5Mn-HA and 5Mn-HA/PDA were selected for subsequent experiments. (2) Based on the results of alkaline phosphatase activity assay, Alizarin Red S staining, and q-PCR, 5Mn-HA/PDA exhibited stronger osteogenic differentiation ability than the other three materials. (3) Micro-CT scanning showed that the blank control group had the slowest bone repair rate and the least amount of new bone formation, while the 5Mn-HA/PDA group had the fastest bone repair rate and the most new bone formation. Hematoxylin-eosin and Masson staining further confirmed the Micro-CT scanning results. (4) The results indicate that the manganese-doped hydroxyapatite/polydopamine composite material possesses excellent physicochemical and biological properties.

Key words: bone regeneration, hydroxyapatite microspheres, polydopamine, manganese ions, metal ions, bone defect repair

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