中国组织工程研究 ›› 2025, Vol. 29 ›› Issue (4): 707-712.doi: 10.12307/2025.259

• 纳米生物材料 nanobiomaterials • 上一篇    下一篇

PLGA/赖氨酸接枝氧化石墨烯纳米粒子复合支架对MC3T3细胞成骨分化的影响

余双奇1,丁  凡1,万  松1,陈  伟1,张学俊1,陈  东1,李  强1,林作丽2   

  1. 武汉市普仁医院,1脊柱外科,2社医办,湖北省武汉市  430081
  • 收稿日期:2023-12-15 接受日期:2024-02-19 出版日期:2025-02-08 发布日期:2024-05-30
  • 通讯作者: 林作丽,医师,武汉市普仁医院社医办,湖北省武汉市 430081
  • 作者简介:余双奇,男,1990年生,河南省信阳市人,汉族,硕士,主治医师,主要从事脊髓损伤与修复方面的研究。
  • 基金资助:
    湖北省卫生健康科研基金资助项目(WJ2021F015),项目负责人:余双奇

Effects of polylactic acid-glycolic acid copolymer/lysine-grafted graphene oxide nanoparticle composite scaffolds on osteogenic differentiation of MC3T3 cells

Yu Shuangqi1, Ding Fan1, Wan Song1, Chen Wei1, Zhang Xuejun1, Chen Dong1, Li Qiang1, Lin Zuoli2   

  1. 1Department of Spine Surgery, 2Community Medicine Office, Wuhan Puren Hospital, Wuhan 430081, Hubei Province, China
  • Received:2023-12-15 Accepted:2024-02-19 Online:2025-02-08 Published:2024-05-30
  • Contact: Lin Zuoli, Physician, Community Medicine Office, Wuhan Puren Hospital, Wuhan 430081, Hubei Province, China
  • About author:Yu Shuangqi, Master, Attending physician, Department of Spine Surgery, Wuhan Puren Hospital, Wuhan 430081, Hubei Province, China
  • Supported by:
    Scientific Research Project of Health Commission of Hubei Province, No. WJ2021F015 (to YSQ)

摘要:

文题释义:

聚乳酸-羟基乙酸共聚物:是一类体内可生物降解吸收的脂肪族聚酯医用高分子,具有较好的生物相容性、降解性和力学性能,目前在手术缝线、组织工程支架、药物载体领域被广泛应用。

氧化石墨烯:是石墨烯的氧化物,颜色为棕黄色。氧化石墨烯上富含如羟基、羧基、环氧基等一系列氧活性官能团,这些功能性基团赋予了氧化石墨烯优异的亲水性、分散性和生物相容性。
背景:骨损伤后如何有效促进骨再生和骨重建一直是临床骨修复研究中的关键问题,利用生物和降解材料搭载生物活性因子在骨修复中具有优秀的应用前景。
目的:探究赖氨酸接枝氧化石墨烯(LGA-g-GO)纳米粒子改性的聚乳酸-羟基乙酸共聚物(PLGA)复合支架对成骨分化及新骨形成的影响。
方法:将PLGA溶于二氯甲烷中,利用溶剂挥发法制备PLGA支架;将氧化石墨烯均匀分散于PLGA溶液中制备PLGA/GO复合支架;利用化学接枝法制备LGA-g-GO纳米粒子,将LGA-g-GO纳米粒子按不同的质量比(1%,2%,3%)与PLGA共混构建出PLGA/LGA-g-GO复合支架。表征5组支架的微观形貌、亲水性、蛋白吸附能力。将MC3T3细胞分别接种于5组支架表面,检测细胞增殖与成骨分化情况。
结果与结论:①扫描电镜下可见PLGA支架表面光滑平坦,其余4组支架表面粗糙,并且随着LGA-g-GO纳米粒子加入量的增加,复合支架的表面粗糙程度加重;PLGA/LGA-g-GO(3%)复合支架的水接触角低于其他4组支架(P < 0.05);PLGA/LGA-g-GO(1%,2%,3%)复合支架的蛋白吸附能力强于PLGA、PLGA/GO支架(P < 0.05);②CCK-8检测显示,PLGA/LGA-g-GO(2%,3%)复合支架可促进MC3T3细胞的增殖;碱性磷酸酶染色与茜素红染色显示,PLGA/LGA-g-GO(2%,3%)组细胞碱性磷酸酶活性高于其他3组(P < 0.05),PLGA/GO组、PLGA/LGA-g-GO(1%,2%,3%)组钙沉积多于PLGA组(P < 0.05);③结果表明,PLGA/LGA-g-GO复合支架能够促进成骨细胞的增殖和成骨分化,有利于骨损伤后的骨再生和骨重建。
https://orcid.org/0009-0006-5518-0637(余双奇)

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: 乳酸-羟基乙酸共聚物, 赖氨酸, 氧化石墨烯, 纳米粒子, 复合支架, 骨再生, 生物组织工程

Abstract: BACKGROUND: How to effectively promote bone regeneration and bone reconstruction after bone injury has always been a key issue in clinical bone repair research. The use of biological and degradable materials loaded with bioactive factors to treat bone defects has excellent application prospects in bone repair.
OBJECTIVE: To investigate the effect of polylactic acid-glycolic acid copolymer (PLGA) composite scaffold modified by lysine-grafted graphene oxide nanoparticles (LGA-g-GO) on osteogenic differentiation and new bone formation.
METHODS: PLGA was dissolved in dichloromethane and PLGA scaffold was prepared by solvent evaporation method. PLGA/GO composite scaffolds were prepared by dispersing graphene oxide uniformly in PLGA solution. LGA-g-GO nanoparticles were prepared by chemical grafting method, and the PLGA/LGA-g-GO composite scaffolds were constructed by blending LGA-g-GO nanoparticles at different mass ratios (1%, 2%, and 3%) with PLGA. The micromorphology, 
hydrophilicity, and protein adsorption capacity of scaffolds of five groups were characterized. MC3T3 cells were inoculated on the surface of scaffolds of five groups to detect cell proliferation and osteogenic differentiation.  
RESULTS AND CONCLUSION: (1) The surface of PLGA scaffolds was smooth and flat under scanning electron microscope, while the surface of the other four scaffolds was rough. The surface roughness of the composite scaffolds increased with the increase of the addition of LGA-g-GO nanoparticles. The water contact angle of PLGA/LGA-g-GO (3%) composite scaffolds was lower than that of the other four groups (P < 0.05). The protein adsorption capacity of PLGA/LGA-g-GO (1%, 2%, and 3%) composite scaffolds was stronger than PLGA and PLGA/GO scaffolds (P < 0.05). (2) CCK-8 assay showed that PLGA/LGA-g-GO (2%, 3%) composite scaffold could promote the proliferation of MC3T3 cells. Alkaline phosphatase staining and alizarin red staining showed that the cell alkaline phosphatase activity in PLGA/LGA-g-GO (2%, 3%) group was higher than that in the other three groups (P < 0.05). The calcium deposition in the PLGA/GO and PLGA/LGA-g-GO (1%, 2%, and 3%) groups was higher than that in the PLGA group (P < 0.05). (3) In summary, PLGA/LGA-g-GO composite scaffold can promote the proliferation and osteogenic differentiation of osteoblasts, and is conducive to bone regeneration and bone reconstruction after bone injury.

Key words: polylactic acid-glycolic acid copolymer, lysine, graphene oxide, nanoparticle, composite scaffold, bone regeneration, biological tissue engineering

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