中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (22): 3531-3535.doi: 10.3969/j.issn.2095-4344.2017.22.015

• 材料生物相容性 material biocompatibility • 上一篇    下一篇

胶原海绵复合人脂肪干细胞促血管新生

薛静娴1,陈  绪1,许岩磊1,任伟业2,李  燕2,张宇轩1,姚  昶1
  

  1. 1南京中医药大学附属医院,江苏省南京市  210029;2无锡贝迪生物工程有限公司,江苏省无锡市  214902
  • 收稿日期:2018-01-13 出版日期:2017-08-08 发布日期:2017-09-01
  • 通讯作者: 姚昶,主任中医师,博士生导师,南京中医药大学附属医院,江苏省南京市 210029
  • 作者简介:薛静娴,女,1990年生,江苏省盐城市人,汉族,南京中医药大学在读博士,主要从事中医乳腺疾病研究。
  • 基金资助:

    国家自然科学基金(81373646);康缘基金(HZ1009KY);江苏省高校优势学科建设项目II期(012062003010);江苏省中医院高峰学术人才培养(y2014cr06)

Improving angiogenesis by collagen sponge carrying human adipose-derived stem cells

Xue Jing-xian1, Chen Xu1, Xu Yan-lei1, Ren Wei-ye2, Li Yan2, Zhang Yu-xuan1, Yao Chang1
  

  1. 1Affiliated Hospital of Nanjing Medical University of Chinese Medicine, Nanjing 210029, Jiangsu Province, China; 2Wuxi Biot Bio-technology Co., Ltd., Wuxi 214902, Jiangsu Province, China
  • Received:2018-01-13 Online:2017-08-08 Published:2017-09-01
  • Contact: Yao Chang, Chief physician, Doctoral supervisor, Affiliated Hospital of Nanjing Medical University of Chinese Medicine, Nanjing 210029, Jiangsu Province, China
  • About author:Xue Jing-xian, Studying for doctorate, Affiliated Hospital of Nanjing Medical University of Chinese Medicine, Nanjing 210029, Jiangsu Province, China
  • Supported by:
     the National Natural Science Foundation of China, No. 81373646; Kanion Fund, No. HZ1009KY; the Preponderant Discipline Construction Project II for High Education in Jiangsu Province, No. 012062003010; the Academic Personnel Training Project of Traditional Chinese Medicine in Jiangsu Province, No. y2014cr06

摘要:

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文题释义:
鸡胚绒毛尿囊膜:是研究促血管生成与抗血管生成的理想体内模型。生理情况下,血管形成主要发生在胚胎发育和女性月经周期内膜修复过程。另外,在很多病理情况下,血管生成都起着重要作用,如损伤修复、炎症、恶性肿瘤、风湿性关节炎、糖尿病视网膜病变、银屑病、创伤愈合等也常伴随发生血管新生,特别是肿瘤生长和转移与血管新生密切相关,实体瘤必须依赖血管生成才能生长、侵袭和转移。因为鸡胚绒毛尿囊膜是天然免疫缺陷宿主,而且可耐受一定的温度变化,有利于检测某些对温度敏感的肿瘤细胞的生物学行为。所以,鸡胚绒毛尿囊膜模型常作为移植性肿瘤的实验模型之一,也可作为肿瘤新生血管形成、肿瘤侵袭和远处脏器转移潜能,以及抗肿瘤药物作用机制探讨等方面研究的体内实验模型。
 
背景:研究发现,脂肪干细胞胶原复合物可促进脂肪干细胞向成熟脂肪细胞分化、成熟,并可促进血管新生。
目的:探查胶原海绵复合脂肪干细胞的生物学特性及其对血管新生的影响。
方法:①实验组将人脂肪干细胞接种于胶原海绵上,以细胞单独培养为阴性对照组,培养24 h后,检测细胞黏附率;培养第2,4,6天,检测细胞增殖与培养液中血管内皮生长因子水平;②鸡胚绒毛尿囊膜实验:暴露孵育7 d的鸡胚尿囊膜,分4组,空白组向尿囊膜加入0.2 mL无菌PBS,脂肪干细胞组加入0.2 mL 2×108 L-1第3代脂肪干细胞悬液,胶原海绵组加入胶原海绵,复合组加入2×108 L-1第3代脂肪干细胞悬液0.2 mL与胶原海绵。孵育7 d后,测定尿囊膜周围微血管计数。
结果与结论:①细胞黏附率:脂肪干细胞在胶原海绵上的黏附率为(93.04±0.67)%;②细胞增殖与培养液中血管内皮细胞生长因子水平:实验组培养第6天的细胞增殖A值高于对照组(P < 0.01),培养第4,6天的血管内皮生长因子水平高于对照组(P < 0.05);③鸡胚绒毛尿囊膜实验:脂肪干细胞组、胶原海绵组、复合组微血管计数高于空白组(P < 0.05),复合组高于脂肪干细胞组、胶原海绵组(P < 0.05);④结果表明:脂肪干细胞与胶原海绵具有良好的生物相容性,两者复合有良好的促进血管新生作用,其机制可能与促进脂肪干细胞增殖与分泌血管内皮生长因子相关。

关键词: 生物材料, 材料相容性, 脂肪干细胞, 胶原海绵, 生物相容性, 支架, 血管新生, 国家自然科学基金

Abstract:

BACKGROUND: Studies have found that adipose-derived stem cells (ADSCs)/collagen complexes can promote the ADSCs differentiation and maturation into mature adipocytes and promote angiogenesis.
OBJECTIVE: To explore the biological properties of the ADSCs/collagen sponge composite material and to detect its effect on angiogenesis.
METHODS: (1) ADSCs were cultured on collagen sponge (experimental group) or cultured alone (control group). After 24 hours of culture, cell adhesive rate of ADSCs was determined with flow cytometry. After 2, 4, 6 days of culture, cell proliferation and level of vascular endothelial growth factor (VEGF) in the culture medium were detected. (2) Chick embryo chorioallantoic membranes were exposed and incubated for 7 days and then divided into four groups: 0.2 mL of sterile PBS was added in the blank group, 0.2 mL of 2×108/L passage 3 ADSCs suspension was added in the ADSCs group, collagen sponge was added in the collagen sponge group, and collagen sponge with 0.2 mL of 2×108/L passage 3 ADSCs suspension was added in the composite group. After 7 days of incubation, the microvessel count around the chorioallantoic membrane was measured.
RESULTS AND CONCLUSION: (1) The cell adhesive rate of ADSCs to collagen sponge reached to (93.04±0.67)%. (2) The absorbance value (at 6 days of culture) and level of VEGF (at 4 and 6 days of culture) in the experimental group were significantly higher than those in the control group (P < 0.01 or P < 0.05). (3) Compared with the blank group, the number of microvessels was significantly higher in the ADSCs, collagen sponge and composite groups (P < 0.05). Moreover, higher amount of microvessels were found in the composite group than the ADSCs and collagen sponge groups (P < 0.05). To conclude, ADSCs can adhere well to the collagen sponge with good biocompatibility and their combined use can improve angiogenesis further by enhancing cell proliferation and VEGF secretion of ADSCs.

Key words: Collagen, Stem Cells, Tissue Engineering

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