中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (34): 5129-5135.doi: 10.3969/j.issn.2095-4344.2016.34.018

• 细胞外基质材料 extracellular matrix materials • 上一篇    下一篇

血小板纤维蛋白支架对心肌梗死的治疗作用

张 燕,陈 岩,李庆民,孟 华   

  1. 郑州大学人民医院心内科,河南省郑州市 450003
  • 收稿日期:2016-05-24 出版日期:2016-08-19 发布日期:2016-08-19
  • 作者简介:张燕,1973年生,河南省安阳市人,汉族,2013年郑州大学医学院毕业,硕士,副主任医师。

Platelet-fibrin scaffold for treatment of myocardial infarction

Zhang Yan, Chen Yan, Li Qing-min, Meng Hua   

  1. Department of Cardiology, Henan Provincial People’s Hospital, Zhengzhou University, Zhengzhou 450000, Henan Province, China
  • Received:2016-05-24 Online:2016-08-19 Published:2016-08-19
  • About author:Zhang Yan, Master, Associate chief physician, Department of Cardiology, Henan Provincial People’s Hospital, Zhengzhou University, Zhengzhou 450000, Henan Province, China

摘要:

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文题释义:
血小板纤维蛋白支架
:能够从血液中提取,可以代替异体的纤维蛋白胶,其血液收集和制备过程比较简单。血小板纤维蛋白胶呈三维结构,由纤维蛋白形成立体网络状,并且在不同区域纤维蛋白网的疏密状况不同,血小板纤维蛋白支架能够为种子细胞提供比较好的三维立体生存空间,而且能够释放多种细胞因子调节细胞的分化和增殖。
心肌再生生物材料:生物材料的发展为心肌梗死的治疗提供了新的思路,目前已有纤维蛋白胶、基质胶、细胞外基质乳液、藻酸盐等多种生物材料用于心肌再生的治疗,并且取得了一定疗效。用于治疗心肌再生的生物材料需要具备取材简单、制备方便、生物兼容性好、对患者损伤小、并且能够为受到损伤的心肌提供功能和结构上的支持。


背景:生物材料的发展为心肌梗死的治疗提供了新的思路,目前已有纤维蛋白胶、基质胶、细胞外基质乳液、藻酸盐等多种生物材料用于心肌再生的治疗。目前有关血小板纤维蛋白支架治疗心肌梗死的研究不多。
目的:探讨血小板纤维蛋白支架对大鼠心肌梗死的治疗作用。
方法:采用血小板纤维蛋白胶制备血小板纤维蛋白支架。将40只心肌梗死模型大鼠随机分为2组,血小板纤维蛋白支架组在大鼠的梗死心肌四周注射血小板纤维蛋白胶200 μL,对照组在心肌梗死四周相同的位置注射等量的DMEM。检测血小板纤维蛋白支架释放血管内皮生长因子、肝细胞生长因子、胰岛素样生长因子1等细胞因子的表达情况,观察血小板纤维蛋白支架植入后心肌梗死大鼠内皮细胞和心肌细胞的生成、心肌细胞凋亡、血管密度及其心脏功能。
结果与结论:①血小板纤维蛋白支架被成功制备,在纤维蛋白支架培养的第14天时血小板纤维蛋白支架释放的血管内皮生长因子为(115.7±19.45) ng/L,肝细胞生长因子为(23.98±12.32) ng/L,胰岛素样生长因子1为(288.4±16.74) ng/L;②血小板纤维蛋白支架组的vWF阳性细胞数及a-SA阳性细胞数均明显高于对照组(P < 0.05),血小板纤维蛋白支架组的TUNEL阳性细胞数低于对照组(P < 0.05);③血小板纤维蛋白支架组的毛细血管密度及有血流的毛细血管均明显高于对照组(P < 0.05);④血小板纤维蛋白支架组的左心室舒张末期容积和左心室收缩末期容积均明显低于对照组(P < 0.05);⑤结果提示,血小板纤维蛋白支架能够促进内皮细胞、心肌细胞以及毛细血管的生成,改善心脏功能,血小板纤维蛋白支架对心脏的保护作用可能与其分泌的细胞因子有关。

ORCID: 0000-0002-7996-9409(张燕)

关键词: 生物材料, 材料相容性, 血小板纤维蛋白支架, 大鼠, 心肌梗死, 心肌细胞, 内皮细胞, 毛细血管

Abstract:

BACKGROUND: The development of biomaterials provides a new idea for myocardial infarction treatment, and so far there are numerous biomaterials, such as fibrin glue, matrigel, emulsion of extracellular matrix and alginate, for myocardial infarction. But there is a lack of studies about the platelet-fibrin scaffold for myocardial infarction.
OBJECTIVE: To explore the effect of the platelet-fibrin scaffold on rat myocardial infarction.
METHODS: Platelet-fibrin was used to prepare a platelet-fibrin scaffold, and 40 rat models of myocardial infarction were randomly divided into two groups: 200 μL platelet fibrins were injected into the tissues around the rat infarcted myocardium as platelet-fibrin scaffold group, and the same amount of DMEM was injected into the tissues around the rat infarcted myocardium as control group. Subsequently, expressions of vascular endothelial growth factor, hepatocyte growth factor and insulin-like growth factor 1 released from the scaffold were detected. Production of endothelial cells and cardiomyocytes, cardiomyocyte apoptosis, capillary density and cardiac function in rats after implantation were observed.
RESULTS AND CONCLUSION: The platelet-fibrin scaffold was successfully prepared. The expression of vascular endothelial growth factor, hepatocyte growth factor and insulin-like growth factor 1 in the scaffold group was (115.7±19.45), (23.98±12.32) and (288.4±16.74) ng/L, respectively. The number of von Willebrand factor-positive cells and a-SA-positive cells in the platelet-fibrin scaffold group was significantly higher than that in the control group (P < 0.05). The number of TUNEL-positive cells in the platelet-fibrin scaffold group was significantly lower than that in the control group (P < 0.05). The capillary density and capillaries with blood flow in the platelet-fibrin scaffold group were significantly higher than those in the control group (P < 0.05). Both the left ventricular end-diastolic volume and left ventricular end-systolic volume in the platelet-fibrin scaffold group were significantly lower than those in the control group (P < 0.05). In conclusion, the platelet-fibrin scaffold can promote the generation of endothelial cells, cardiomyocytes and capillaries, and further improve heart function. Besides, the platelet-fibrin scaffold exerts protective effect on the heart probably by secreting cytokines.

Key words: Capillaries, Endothelial Cells, Myocytes, Cardiac, Myocardial Infarction, Fibrin, Tissue Engineering

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