中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (30): 4463-4468.doi: 10.3969/j.issn.2095-4344.2016.30.008

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

静压力对脂肪干细胞与静电纺丝纳米纤维细胞相容性的影响

陈 亮1,白 轶2,刘 凯3,张 伟4   

  1. 1华中科技大学同济医学院附属同济医院泌尿外科,湖北省武汉市 430030;2武汉大学口腔医学院口腔医院种植科,湖北省武汉市 430079;3武汉理工大学材料科学与工程学院,湖北省武汉市 430070;4武汉市中心医院泌尿外科,湖北省武汉市 430014
  • 收稿日期:2016-05-05 出版日期:2016-07-15 发布日期:2016-07-15
  • 通讯作者: 张伟,武汉市中心医院泌尿外科,湖北省武汉市 430014
  • 作者简介:陈亮,男,1979年生,湖北省武汉市人,汉族,2011年华中科技大学毕业,博士,主要从事组织工程研究。
  • 基金资助:

    国家自然科学基金青年基金(31400837);华中科技大学自主创新基金(2013);华中科技大学同济医学院附属同济医院科学研究基金(2012)

Effects of static pressure on the cytocompatibility of adipose-derived stem cells on electrospun nanofibers

Chen Liang1, Bai Yi2, Liu Kai3, Zhang Wei4   

  1. 1Department of Urology, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, China; 2Departmant of Oral Implantology. Hospital and School of Stomatology of Wuhan University, Wuhan 430079, Hubei Province, China; 3School of Materials Science and Engineering of Wuhan University of Technology, Wuhan 430070, Hubei Province, China; 4Department of Urology, Central Hospital of Wuhan, Wuhan 430014, Hubei Province, China
  • Received:2016-05-05 Online:2016-07-15 Published:2016-07-15
  • Contact: Zhang Wei, Department of Urology, Central Hospital of Wuhan, Wuhan 430014, Hubei Province, China
  • About author:Chen Liang, M.D., Department of Urology, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, China
  • Supported by:

    the National Natural Science Foundation of China for the Youth, No. 31400837; the Independent Innovation Foundation of Huazhong University of Science and Technology, No. 2013; the Research Foundation of Affiliated Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, No. 2012

摘要:

文章快速阅读:

 

文题释义:
静电纺丝
:是一种特殊的纤维制造工艺,聚合物溶液或熔体在强电场中进行喷射纺丝。在电场作用下,针头处的液滴会由球形变为圆锥形(即“泰勒锥”),并从圆锥尖端延展得到纤维细丝。这种方式可以生产出纳米级直径的聚合物细丝。
静压力:文中特指流体静压力,是指处于相对静止状态下的流体,由于本身的重力或其他外力的作用,在流体内部及流体与容器壁面之间存在着垂直于接触面的作用力。静压力可分表面力及质量力两项:①表面力:外界,如大气、活塞或密闭容器的器壁,施加在流体表面的压力;②质量力:流体受重力作用产生的压力,此力与流体的高度成正比。

背景:静电纺丝聚乳酸/聚己内酯纳米纤维是课题组自行合成的生物可降解材料,前期研究表明该材料生物相容性优越,但缺乏对该材料力学方面的研究。
目的:研究静压力对脂肪干细胞与静电纺丝聚乳酸/聚己内酯纳米纤维支架细胞相容性的影响。
方法:将脂肪干细胞接种到由聚乳酸和聚己内酯合成的静电纺丝纳米纤维支架上,置于含体积分数为10%胎牛血清的DMEM低糖培养基中培养。利用静压力装置分别对培养板持续加载0,15,30,45 kPa的静压力,加载时间为4 h。采用MTT法、活死细胞染色检测脂肪干细胞在静电纺丝纳米纤维支架上的增殖、黏附和活性,评价脂肪干细胞与静电纺丝纳米纤维的细胞相容性。
结果与结论:①在体外培养条件下,经不同静压力持续加载4 h后,MTT法增殖检测得出的各组吸光度值经单因素方差分析差异存在显著性意义。在0-30 kPa压力范围内,吸光度值随静压力的增加而增加,到45 kPa时,吸光度值反而下降。各组间多重比较显示差异均有显著性意义;②用MTT法进一步检测细胞黏附百分率,各组间差异亦有显著性意义;③活死细胞染色结果印证了上述结果,统计分析表明,无论是单因素方差分析还是各组间配对t检验,4组间活细胞百分率的差异均有非常显著性意义;④适当大小的静压力可促进脂肪干细胞与静电纺丝纳米纤维的生物相容性,细胞增殖、黏附及活性有所提高,但过高的静压力会抑制细胞的生物学行为,从而影响脂肪干细胞与静电纺丝纳米纤维的相容性。
ORCID: 0000-0001-9720-7099(陈亮)

关键词: 生物材料, 纳米材料, 静压力, 脂肪干细胞, 静电纺丝, 纳米纤维, 增殖, 黏附, 细胞活性, 细胞相容性, 国家自然科学基金

Abstract:

BACKGROUND: Electrospun polylactic acid/polycaprolactone nanofibers (ENF) are a kind of self-synthesized biodegradable material. Our preliminary studies have indicated that the biomaterial exhibits excellent biocompatibility; however, the research about its mechanics is still little.
OBJECTIVE: To explore the effects of static pressure on the cytocompatibility of adipose-derived stem cells on the ENF scaffold.
METHODS: Adipose-derived stem cells were seeded onto the ENF scaffold, and then cultured in the low-glucose DMEM supplemented with 10% fetal bovine serum. The mixed constructs were submitted to the static pressure at 0, 15, 30, and 45 kPa for 4 hours using a static pressure device, respectively. Subsequently, the proliferation, adhesion and viability of adipose-derived stem cells on the ENF scaffold were detected using MTT assay and living/dead staining to evaluate the cytocompatibility.
RESULTS AND CONCLUSION: MTT assay showed that there were significant differences in absorbance values among groups by one-way analysis of variance after 4 hours of loading with different static pressures in vitro. Under 0-30 kPa static pressure, the absorbance values increased with static pressure, but the absorbance values declined until the pressure reached 45 kPa, and multiple comparisons between groups showed significant difference. The significant differences in the cell attachment percentage by MTT assay could be found among groups. The living/dead staining results supported the above findings. Furthermore, the significant differences in percentage of living cells among groups were shown using either one-way analysis of variance or paired t test. In conclusion, the appropriate static pressure can promote the cytocompatibility, proliferation, adhesion and viability of adipose-derived stem cells on the ENF scaffold. But the excessive pressure is likely to inhibit the cellular biological behaviors, thus affecting cytocompatibility of adipose-derived stem cells with the ENF scaffold.

 

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

Key words: Adipose Tissue, Stem Cells, Nanofibers, Pressure, Tissue Engineering

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