中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (16): 2488-2493.doi: 10.3969/j.issn.2095-4344.3114

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

载阿霉素自组装多肽水凝胶的制备及体外评价

张  馨1,陆  莹1,姚庆强2,朱颐申1   

  1. 1南京工业大学,江苏省南京市   211816;2南京医科大学附属南京医院骨科,江苏省南京市  210006
  • 收稿日期:2020-02-18 修回日期:2020-02-27 接受日期:2020-06-05 出版日期:2021-06-08 发布日期:2021-01-07
  • 通讯作者: 姚庆强,教授,南京医科大学附属南京医院骨科,江苏省南京市 210006 朱颐申,教授,南京工业大学生物与制药工程学院,江苏省南京市 211816
  • 作者简介:张馨,女,1994年生,陕西省西安市人,汉族,2020年南京工业大学毕业,硕士,主要从事骨组织工程方面的研究。
  • 基金资助:
    江苏省社会发展重点项目(BE2019736),项目负责人:朱颐申

Preparation and in vitro evaluation of self-assembling peptide hydrogel loaded with doxorubicin

Zhang Xin1, Lu Ying1, Yao Qingqiang2, Zhu Yishen1   

  1. 1Nanjing Tech University, Nanjing 211816, Jiangsu Province, China; 2Department of Orthopedic Surgery, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, Jiangsu Province, China
  • Received:2020-02-18 Revised:2020-02-27 Accepted:2020-06-05 Online:2021-06-08 Published:2021-01-07
  • Contact: Yao Qingqiang, Professor, Department of Orthopedic Surgery, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, Jiangsu Province, China Zhu Yishen, Professor, The College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu Province, China
  • About author:Zhang Xin, Master, Nanjing Tech University, Nanjing 211816, Jiangsu Province, China
  • Supported by:
    the Key Project of Social Development in Jiangsu Province, No. BE2019736 (to ZYS)

摘要:

文题释义:
自组装多肽水凝胶:是一种能够人工合成且具有类似细胞外机制的组织工程材料,其中多肽分子可利用非共价键作用力自组装形成纳米纤维结构,与生物矿化、纳米技术、组织工程、细胞生物学等学科相结合可促进软骨与骨再生。
药物缓释系统:药物缓释是通过物理或化学手段将小分子药物与高分子载体结合,在体内扩散、渗透,将小分子药物持续可控的释放出来,从而达到预期的药物治疗效果。药物缓释系统由于具有良好的生物相容性、可调节的释药速率、特异的靶向性等特点,被广泛运用于肿瘤治疗方面的研究。

背景:化疗是治疗骨肉瘤的重要手段,但传统的小分子疗法临床疗效不理想,不良反应严重,因此需要研发一种治疗骨肉瘤的新治疗方法,能够低剂量下抗肿瘤并降低不良反应。
目的:构建载阿霉素的自组装多肽水凝胶体系(doxorubicin self-assembling peptide hydrogel,DOX-SAPH),分析其体外药物释放性能与生物相容性。
方法:将阿霉素引入到由FEFEFKFK(F为苯丙氨酸,E为谷氨酸,K为赖氨酸)构成的自组装多肽水凝胶中,制备含20,30,40 g/L FEFEFKFK的DOX-SAPH,该体系中阿霉素质量浓度为2 g/L。将3种DOX-SAPH置于PBS中,定时检测阿霉素释放量。将3种DOX-SAPH浸提液分别与兔骨髓间充质干细胞共培养,CCK-8法检测细胞存活率。将不同质量浓度的阿霉素溶液与含不同质量浓度阿霉素的DOX-SAPH浸提液(含FEFEFKFK 30 g/L)分别与MG63人骨肉瘤细胞共培养,采用CCK-8法检测细胞存活率。
结果与结论:①随着水凝胶中FEFEFKFK质量浓度的增加,DOX-SAPH的缓释作用增强,体外第168小时,20,30,40 g/L DOX-SAPH的药物累计释放率分别为88%,83%,80%;②体外共培养1,3,5 d时,20 g/L DOX-SAPH浸提液组的细胞增殖快于30,40 g/L DOX-SAPH浸提液组      (P < 0.05),其中40 g/L DOX-SAPH浸提液组于第1天时有一定的细胞毒性;③阿霉素溶液与DOX-SAPH浸提液呈浓度依赖性抑制MG63细胞的增殖,当阿霉素溶液与DOX-SAPH浸提液中阿霉素质量浓度<12.5 mg/L时,二者对MG63细胞的毒性无明显差异(P > 0.05);当阿霉素质量浓度≥  12.5 mg/L时,阿霉素溶液的细胞毒性大于DOX-SAPH浸提液(P < 0.05);④结果表明,DOX-SAPH具有良好的药物缓释作用,可抑制MG63骨肉瘤细胞的生长。

关键词: 骨, 材料, 水凝胶, 肿瘤, 阿霉素, 体外评价, 骨肉瘤, 组织工程

Abstract: BACKGROUND: Chemotherapy is an important method for treating osteosarcoma, but traditional small molecule therapy is not ideal for clinical efficacy and has serious adverse reactions. Therefore, it is necessary to develop a new method for osteosarcoma, which can anti-tumor at low doses and reduce adverse reactions.
OBJECTIVE: To construct a self-assembling peptide hydrogel (SAPH) loaded with doxorubicin (DOX) and analyze its drug release performance and biocompatibility in vitro.
METHODS: DOX was introduced into SAPH composed of FEFEFKFK (F, phenylalanine; E, glutamic acid; K, lysine), prepared to contain 20, 30, and 40 g/L DOX-SAPH of FEFEFKFK; the DOX mass concentration in this system was 2 g/L. Three kinds of DOX-SAPH were placed in PBS, and the amount of DOX released was regularly detected. Three DOX-SAPH extracts were co-cultured with rabbit bone marrow mesenchymal stem cells, and the cell survival rate was detected by CCK-8 method. The DOX solution containing different concentrations of DOX and the DOX-SAPH extract (containing FEFEFKFK 30 g/L) were co-cultured with MG63 human osteosarcoma cells, and the cell survival rate was detected by CCK-8 method. 
RESULTS AND CONCLUSION: (1) With the increase of the concentration of FEFEFKFK in the hydrogel, the sustained release effect of DOX-SAPH was enhanced. The cumulative drug release rate of DOX-SAPH at 20, 30, and 40 g/L at the 168th hour in vitro was 88%, 83%, and 80%. (2) The cells in 20 g/L DOX-SAPH extract group proliferated faster than 30 and 40 g/L DOX-SAPH extract group at 1, 3, and 5 days in vitro (P < 0.05), in which the 40 g/L DOX-SAPH extract group had certain cytotoxicity on the first day. (3) DOX solution and DOX-SAPH extract showed concentration-dependent inhibition of MG63 cell proliferation, when the concentration of DOX in the DOX solution and the DOX-SAPH extract was lower than 12.5 mg/L, there was no significant difference in the toxicity of the two to MG63 cells (P > 0.05). When the concentration of DOX was higher than 12.5 mg/L, the cell toxicity of the DOX solution was greater than that of DOX-SAPH extract (P < 0.05). (4) The results show that DOX-SAPH has a good drug slow-release effect, which can inhibit the growth of MG63 osteosarcoma cells.

Key words: bone, materials, hydrogel, tumor, doxorubicin, in vitro evaluation, osteosarcoma, tissue engineering

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