中国组织工程研究

• 生物材料基础实验 basic experiments of biomaterials • 上一篇    下一篇

牛磺酸铜干预感染愈合创面血管内皮生长因子A的表达

王寿宇,田曦亮,吕德成   

  1. 大连医科大学附属第一医院骨科, 辽宁省大连市 116011
  • 收稿日期:2012-09-22 修回日期:2012-10-16 出版日期:2013-05-21 发布日期:2013-05-21
  • 通讯作者: 吕德成,教授,主任医师,大连医科大学附属第一院骨科,辽宁省大连市 116011 lvdecheng88@sina.com
  • 作者简介:王寿宇☆,男,1976年生,辽宁省阜新市人,汉族,2008年大连医科大学毕业,博士,副教授,主要从事创面修复的基础与临床研究。 wangshouyu666.student @sina.com
  • 基金资助:

    国家自然科学基金项目(面上项目)资助(30901950)

Copper-taurine regulates vascular endothelial growth factor A expression during infected wound healing process in rats

Wang Shou-yu, Tian Xi-liang, Lü De-cheng   

  1. Department of Orthopedics, the First Affiliated Hospital of Dalian Medical University, Dalian  116011, Liaoning Province, China
  • Received:2012-09-22 Revised:2012-10-16 Online:2013-05-21 Published:2013-05-21
  • Contact: Wang Shou-yu☆, M.D., Associate professor, Department of Orthopedics, the First Affiliated Hospital of Dalian Medical University, Dalian 116011, Liaoning Province, China. wangshouyu666.student@sina.com
  • About author:Lü De-cheng, Professor, Chief physician, Department of Orthopedics, the First Affiliated Hospital of Dalian Medical University, Dalian 116011, Liaoning Province, China lvdecheng88@sina.com
  • Supported by:

    the National Natural Science Foundation of China, No. 30901950

摘要:

背景:铜具有广谱杀菌及耐药性强的特点,而且铜作为人体必需微量元素在创面愈合过程中发挥着重要作用。作者前期的实验得到了利于生物体吸收的牛磺酸铜有机化合物。
目的:检测牛磺酸铜的抗菌活性及其对感染创面愈合过程中血管内皮生长因子A表达的影响。
方法:①通过MTT比色法检测牛磺酸铜对金黄色葡萄球菌的最低抑菌浓度。②72只SD大鼠随机分为牛磺酸铜组与生理盐水组两组,于每只大鼠背部制作1个直径1.5 cm的圆形金黄色葡萄球菌感染创面。牛磺酸铜组创面应用最低抑菌浓度的牛磺酸铜溶液1 mL,生理盐水组创面应用生理盐水1 mL,隔日用药1次,直到创面完全愈合。
结果与结论:①经测定牛磺酸铜对金黄色葡萄球菌的最低抗菌浓度为4 g/L。②用药后第7,10天,牛磺酸铜组创面愈合率明显高于生理盐水组(P < 0.05);至第21天,两组创面都完全愈合。③组织学观察显示:用药后第7天,牛磺酸铜组肉芽组织更成熟;用药后第14天,牛磺酸铜组胶原纤维排列整齐,瘢痕窄,胶原内可见再生的毛囊和皮脂腺。④免疫组织化学检测创面血管内皮生长因子A的表达变化显示:牛磺酸铜组血管内皮生长因子A在用药后第3天表达明显高于生理盐水组(P < 0.01),第7,10天,牛磺酸铜组血管内皮生长因子A表达量下降,但仍高于生理盐水组(P < 0.05)。其余时间点表达未见明显差异(P > 0.05)。证实感染创面外用牛磺酸铜药液可以发挥有效的杀菌作用,提高创面愈合率,促进大鼠感染创面血管内皮生长因子A的表达,从而提高创面的愈合质量。

关键词: 生物材料, 生物材料基础实验, 牛磺酸, 铜, 抗菌, 创面愈合, 血管内皮生长因子A, 金黄色葡萄球菌, 感染, 内皮细胞, 成纤维细胞, 瘢痕, 国家自然科学基金

Abstract:

BACKGROUND: Copper has a broad spectrum bactericidal characterization and plays an important role in wound healing. Authors’ previous study has obtained copper-taurine organic compound which provides a better bioavailability to the human body.
OBJECTIVE: To detect the antibacterial activity of copper-taurine and study its effect on vascular endothelial growth factor A expression during infected wound healing.
METHODS: (1) 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay was used to examine the minimum inhibitory concentration of copper-taurine against Staphylococcus aureus. (2) Seventy-two Sprague-Dawley rats were randomly divided into copper-taurine and normal saline groups. A 1.5-cm Staphylococcus aureus infected wound was made on the back of rats. Copper-taurine group was topically treated with copper-taurine liquor 1 mL per wound, and normal saline group treated with normal saline 1 mL per wound.
RESULTS AND CONCLUSION: (1) The minimum inhibitory concentration of the copper-taurine against Staphylococcus aureus was 4 g/L. (2) On days 7 and 10, the percent wound contraction of the copper-taurine group was higher than that of the normal saline group (P < 0.05). Wounds in two groups healed until day 21.     (3) Histological observation: On days 7 and 10, in the copper-taurine group, the granulation was matured showing capillary vertically oriented, robust fusiform fibrocytes and moderate well-arranged collagen.                  (4) Immunohistochemical examination of vascular endothelial growth factor A expression: On day 3, the expression of vascular endothelial growth factor A was significantly higher in the copper-taurine group compared with the normal saline group (P < 0.01). On days 7 and 10, the copper-taurine group still expressed higher vascular endothelial growth factor A than the normal saline group (P < 0.05). There was no difference at other time points (P > 0.05). In conclusion, topically applied copper-taurine on rat infected cutaneous wound can reduce the quantity of microbe, improve vascular endothelial growth factor A expression during wound healing, thus improving the quality of wound healing.
Key Words: biomaterials; basic experiments of biomaterials; taurine; copper; antibacterial; wound healing; vascular endothelial growth factor A; Staphylococcus aureus; infection; endothelial cells; fibroblasts; scar; National Natural Science Foundation of China

Key words: biomaterials, basic experiments of biomaterials, taurine, copper, antibacterial, wound healing, vascular endothelial growth factor A, Staphylococcus aureus, infection, endothelial cells, fibroblasts, scar, National Natural Science Foundation of China

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