中国组织工程研究 ›› 2020, Vol. 24 ›› Issue (28): 4518-4525.doi: 10.3969/j.issn.2095-4344.2284

• 复合支架材料 composite scaffold materials • 上一篇    下一篇

一种新型光交联鱼胶原蛋白肽-透明质酸水凝胶的性能表征

郭恩慧,许子桐,梁贻泽,周  亮,鲁召翔,尤  梁,夏玉军   

  1. 青岛大学医学部,山东省青岛市  266071

  • 收稿日期:2019-10-21 修回日期:2019-10-25 接受日期:2019-11-25 出版日期:2020-10-08 发布日期:2020-09-01
  • 通讯作者: 夏玉军,博士,教授,博士生导师,青岛大学医学部,山东省青岛市 266071
  • 作者简介:郭恩慧,女,1996年生,山东省高密市人,汉族,青岛大学在读本科生。
  • 基金资助:

    青岛市民生科技计划项目(15-9-2-76-nsh)

Properties of a novel photocrosslinked fish collagen peptide-hyaluronic acid hydrogel

Guo Enhui, Xu Zitong, Liang Yize, Zhou Liang, Lu Zhaoxiang, You Liang, Xia Yujun   

  1. Medical College, Qingdao University, Qingdao 266071, Shandong Province, China

  • Received:2019-10-21 Revised:2019-10-25 Accepted:2019-11-25 Online:2020-10-08 Published:2020-09-01
  • Contact: Xia Yujun, PhD, Professor, Doctoral supervisor, Medical College, Qingdao University, Qingdao 266071, Shandong Province, China
  • About author:Guo Enhui, Medical College, Qingdao University, Qingdao 266071, Shandong Province, China
  • Supported by:

    the Qingdao Livelihood Science and Technology Program, No. 15-9-2-76-nsh

摘要:

文题释义:

鱼胶原蛋白肽:提取自深海狭鳕鱼鱼皮中,胶原蛋白是一种高分子功能性蛋白质,是皮肤的主要组成部分。通过酸碱、酶切等技术把分子质量控制在6 000 Da以内的胶原蛋白称之为胶原蛋白肽。肽是精准的蛋白质片段,其吸收率要远远高于大分子蛋白质,富含人体需要的甘氨酸、脯氨酸、羟脯氨酸等氨基酸,在安全性方面没有动物疫病和人工养殖药物残留等风险,且具有多种生物学功能。

光交联:是高分子化合物光化反应的一种。化合物受光照射后发生光解作用,或者化学键的一部分开键时,生成的游离基等活化分子互相键合而导致高分子链形成网状结构的反应。实验水凝胶原材料首先合成胶原蛋白肽-甲基丙烯酸和透明质酸-甲基丙烯酸,继而在光引发剂I2959作用下紫外光照射成胶。

背景:课题组前期实验成功制备了一种新型光交联鱼胶原蛋白肽-透明质酸水凝胶。

目的:分析光交联鱼胶原蛋白肽-透明质酸水凝胶的形态与体外溶胀性能,以及植入体内的组织相容性与降解性。

方法:利用光交联制备光交联鱼胶原蛋白肽-透明质酸水凝胶,并根据其所含的鱼胶原蛋白肽质量浓度分为A(30 g/L)B(50 g/L)C(100 g/L),凝胶中透明质酸质量浓度均为2.5 g/L,通过扫描电镜观察其微观结构,过体外溶胀实验研究水凝胶的溶胀性能。取15只雄性SD大鼠(由青岛琴大养殖有限公司提供),在每只大鼠的3处背部皮下植入3种光交联鱼胶原蛋白肽-透明质酸水凝胶,术后12468周各取3只大鼠,分析水凝胶的组织相容性与降解性。实验获得青岛大学基础医学院伦理委员会批准。

结果与结论:①随着鱼胶原蛋白肽质量浓度的升高,水凝胶的透明度逐渐降低、孔径逐渐缩小;②3种水凝胶在去离子水中浸泡100 min内均达到溶胀平衡,水凝胶的溶胀速率及平衡溶胀率与凝胶中的鱼胶原蛋白肽质量浓度呈反比,A组平衡溶胀率最高,为1 582%;③水凝胶植入后,大鼠皮肤光滑,无溃烂与增生,未发生感染与血肿等并发症;④植入皮下1周时,3组水凝胶周围均可见炎性细胞浸润,至2周时达高峰,随后逐渐减少,术后各时间点的炎性细胞计数为:A>B>C组,组间比较差异有显著性意义(P < 0.05);⑤植入大鼠皮下后,3种水凝胶逐渐降解,至8周时均有水凝胶残留,术后各时间点降解率为:A>B>C组,组间比较差异有显著性意义(P < 0.05);⑥结果表明,光交联鱼胶原蛋白肽-透明质酸水凝胶具有良好的组织相容性与体内降解性,并且通过调节其中鱼胶原蛋白肽的含量可改善其相关性能。

ORCID: 0000-0002-3785-3547(郭恩慧)

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: 水凝胶, 鱼胶原蛋白肽, 透明质酸, 光交联, 溶胀率, 组织相容性, 降解性, 组织工程, 生物材料

Abstract:

BACKGROUND: A novel photocrosslinked fish collagen peptide-hyaluronic acid hydrogel has been successfully prepared by the research group.

OBJECTIVE: To investigate the microstructure and the swelling properties in vitro of the photocrosslinked fish collagen peptide-hyaluronic acid hydrogel, and its histocompatibility and degradability in vivo.

METHODS: A new photocrosslinked fish collagen peptide-hyaluronic acid hydrogel was prepared by photocrosslinking, and then divided into groups A (30 g/L), B (50 g/L) and C (100 g/L) according to the content of fish collagen peptide. The microstructure of the hydrogel was observed by scanning electron microscope and the swelling properties of hydrogels were studied by swelling test in vitro. Fifteen male Sprague-Dawley rats (provided by Qingdao Qinda Breeding Co., Ltd.) were selected, and three kinds of photocrosslinked fish collagen peptide-hyaluronic acid hydrogels were implanted into the back of rats. At 1, 2, 4, 6 and 8 weeks after surgery, three rats were selected for detecting the histocompatibility and biodegradability of hydrogels. The study was approved by the Ethics Committee of School of Basic Medicine, Qingdao University.

RESULTS AND CONCLUSION: (1) With the increase of fish collagen peptide content, the transparency of hydrogel decreased and the pore size of hydrogel decreased. (2) Swelling equilibrium was achieved within 100 minutes in each group, and the swelling velocity and equilibrium swelling rate were inversely proportional to the content of collagen peptide. The equilibrium swelling rate was highest in the group A, which was 1 582%. (3) The hydrogel had good histocompatibility, mild inflammatory reaction, no infection, hematoma or other complications in vivo. (4) At 1 week after implantation, inflammatory cell infiltration was observed surrounding the hydrogels. The level of inflammatory cells peaked at 2 weeks, and then decreased gradually. The count of inflammatory cells was highest in the group A, followed by group B, and lowest in the group C (P < 0.05). (5) After implanted into the back of rats, three kinds of hydrogels began to degrade, and residue still existed up to 8 weeks. The order of degradation rate at each time point was as follows: group A > group B > group C (P < 0.05). (6) These results indicate that photocrosslinked fish collagen peptide-hyaluronic acid hydrogel has good histocompatibility and biodegradability in vivo, which can be adjusted by the content of fish collagen peptides. 

Key words: hydrogel, fish collagen peptide, hyaluronic acid, photo-crosslinking, histocompatibility, degradability, tissue engineering, biomaterials

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