期刊文献+

新型组织工程椎间盘的体外构建及生物学性能研究

In vitro construction and biological properties of new tissue-engineered intervertebral discs
原文传递
导出
摘要 目的探讨构建组织工程椎间盘的可行性及其生物学性能。方法利用组织工程技术构建复合椎间盘。将纤维环和髓核细胞分别接种到复合椎间盘的相应区域;然后将复合椎间盘植入裸鼠背部皮下,分别于植入后4,12周进行大体、组织形态学观察,检测复合椎间盘纤维环和髓核区域羟脯氨酸(Hyp)、糖胺聚糖(GAG)、DNA含量及生物力学性能。结果构建的复合椎间盘大体形态与正常椎间盘组织相似。HE、番红O组织染色显示,复合椎间盘细胞具有分泌细胞外基质的功能,有进展性组织形成,同时纤维环和髓核区域得到良好的整合。扫描电镜显示,复合椎间盘纤维环和髓核区域均有丰富的新生细胞外基质形成。纤维环区域Hyp含量植入前、植入后4,12周分别为(7.1±2.3)μg/mg、(10.1±1.1)μg/mg、(12.6±2.1)μg/mg(P〈0.05),髓核区域Hyp含量分别为(5.9±2.5)μg/mg、(6.6±2.0)μg/mg、(12.5±3.3)μg/mg(P〈0.05);纤维环区域GAG含量分别为(3.3±1.3)μg/mg、(10.9±2.7)μg/mg、(12.4±3.7)μg/mg(P〈0.05),髓核区域分别为(13.4±1.7)μg/mg、(18.4±2.5)μg/mg、(22.7±3.6)μg/mg(P〈0.05);纤维环区域DNA含量分别为(52.2±5.8)ng/mg、(99.7±17.0)ng/mg、(149.5±12.0)ng/mg(P〈0.05),髓核区域DNA含量分别为(66.5±9.2)ng/mg、(148.6±9.8)ng/mg、(187.6±16.6)ng/mg(P〈0.05)。植入后12周,最大载荷、抗压强度、屈服强度及弹性模量与植入前比较差异有统计学意义(P〈0.05)。各时相点生物力学指标均显著低于正常椎间盘(P〈0.05)。结论组织工程复合椎间盘具有与正常椎间盘相似的组织形态和生物学特性,为组织工程椎间盘的临床应用提供了一种可能。 Objective To construct a novel tissue-engineered intervertebral disc complex and investigate the biological properties of the complex. Methods By the technique of tissue engineering, the anulus fibrosus scaffolds and nucleus pulposus cells were seeded in corresponding regions in the composite intervertebral discs. Then, the cell-scaffold hybrids were implanted in the subcutaneous space of the dorsum of athymie mice. At 4, 8, and 12 weeks after implantation, gross observation and histological morphology were performed and hydroxyproline, glycosaminoglycan, DNA content and biochemical properties were evaluated. Results Gross morphology and histology of the engineered discs resembled those of native intervertebral discs. Morphological studies revealed progressive tissue formation and junction integration between anulus fibrosus and nucleus pulposus cells. Scanning microscopy showed new extracellular matrix was rich in anulus fibrosus and nucleus pulposus ceils. Content of hydroxyproline in anulus fibrosus and nucleus pulposus cells increased with time, i.e. before the implantation [ (7.1 ± 2.3) μg/mg, (5.9 ±2.5) μg/mg], at g weeks [ (10. 1 ± 1. 1) μg,/mg, (6.6 ±2.0) μg/mg] and at 12 weeks [ ( 12.6 ± 2.1 ) μg/mg, ( 12. 5 ± 3.3 ) μg/mg] (P 〈 0. 05 ). Content of proteoglycan and DNA showed similar variation trends, i.e. in anulus fibrosus [ (3.3 ±1.3 ) μg/mg, ( 10. 9 ± 2.7 ) μg/mg, ( 12. 4 ± 3.7 ) μg/mg ; (52.2 ± 5.8 ) ng/mg, ( 99.7 ± 17.0 ) ng/mg, ( 149.5 ± 12.0 ) ng/mg respectively ], in nucleus pulposus cells [ ( 13.4 ± 1.7 ) μg/mg, ( 18.4 ± 2.5 ) μg/mg, ( 22.7 ± 3.6 ) μg/mg ; ( 66.5 ± 9. 2) ng/mg, ( 148.6 ± 9.8 ) ng/mg, ( 187.6 ± 16.6) ng/mg respectively ] ( P 〈 0. 05 ). At 12 weeks, the maximum loads, compressive strength, yield strength and elastic modulus differed significantly from those before implantation (P 〈 0. 05 ). Biomechanical markers of the composite were substantially lowered with time compared to those of native tissues (P 〈 0. 05). Conclusion Tissue-engineered discs with similar morphological and biochemical properties to native discs provides a portability in tissue engineering.
出处 《中华创伤杂志》 CAS CSCD 北大核心 2015年第8期738-742,共5页 Chinese Journal of Trauma
基金 国家自然科学基金资助项目(81071496、81071498)
关键词 椎间盘 组织工程 纤维环 Intervertebral disc Tissue engineering Annular fibrosus
  • 相关文献

参考文献15

  • 1Iatridis JC, Nicoll SB, Michalek AJ, et al. Role of biomechanicson intervertebral disc degeneration and regeneration therapies :what needs repairing in the disc and what are promising biometeri-als for its repair? [ J]. Spine J, 2013 , 13(3):243-262.
  • 2Chan SC, Gantenbein-Ritter B. Intervertebral disc regeneration orrepair and stem cell therapy-feasible or fiction? [ J]. SwissMed Wkly, 2012, 31(5) :142.
  • 3庄颖,陈建明,李长青,黄博,周跃.组织工程椎间盘支架材料的初步构建及理化性能分析[J].中国矫形外科杂志,2013,21(13):1334-1339. 被引量:5
  • 4Li CQ, Huang B,Luo G, et al. Construction of collagen II/hyalu-ronate/chondroitin-6-sulfate tri-copolymer scaffold for nucleus pul-posus tissue engineering and preliminary analysis of its physico-chemical properties and biocompatibility [ J ]. J Mater Sci MaterMed, 2010, 21(2) :741-751.
  • 5Huang B,Li CQ, Zhou Y, et al. Collagen II /hyaluronan/ chon-droitin-6- sulfate tri-copolymer scaffold for nucleus pulposus tissueengineering[J]. J Biomed Mater Res B,2010,92(2) :322-331.
  • 6Pan Y, Dong SW, Hao Y, et al. Demineralized bone matrixgelatin as scaffold for tissue engineering [ J ]. Afr J Microbiol Res,2010,4(9) :865-870.
  • 7Huang B,Zhuang Y,Zhou Y,et al. Regeneration of the interver-tebral disc with nucleus pulposus cell-seeded collagen II /hyaluro-nan/chondroitin-6-sulfate tri-copolymer constructs in a rabbit discdegeneration model[ J]. Spine, 2011, 36(26) :2252-2259.
  • 8Kim YJ, Sah RL, Doong JY, et al. Fluorometric assay of DNA incartilage explants using Hoechst 33528 [J]. Anal Biochem, 1988,174(1) :168-176.
  • 9Pattappa G, Li Z, Prroglio M, et al. Diversity of intervertebraldisc cells : phenotype and function [ J ]. J Anat, 2012 , 221 (6 ):480496.
  • 10Wang SZ, Rui YF,Tan Q, et al. Enchancing intervertebral discrepair and regeneration through biology : platelet-rich plasma asan alternative strategy[ J]. Arthritis Res Ther, 2013 , 15(5) :220.

二级参考文献25

  • 1Modic M, Ross J. Lumbar degenerative disk disease [ J ]. Radiology, 2007,245:43 -61.
  • 2Kandel R, Roberts S, Urban JP. Tissue engineering and the interverte- bral disc : the challenges [ J ]. Eur Spine, 2008,4:480 - 491.
  • 3Zhang RY, Ma PX. Porous poly ( L - lactic acid )/apatite composites created by biomimetic process [ J ]. J Biomed Mater Res, 1999,45 : 258 - 293.
  • 4Liu LS, Thompson AY, Heidaran MA, et al. An osteoconductive colla- gen/ hyaluronate matrix for bone regeneration [ J ]. Biomaterials, 1999,20 : 1097 - 1108.
  • 5Pieper JS, Oosterhof A, Dijkstra PJ, et al. Preparation and character- ization of porous crosslinked collagenous matrices containing bioavail- able chondroitin sulphate [ J ]. Biomaterials, 1999,20:847 - 858.
  • 6Masuda K, Lotz JC. New challenges for intervertebral disc treatment using regenerative medicine [ J ]. Tissue Eng Part B Rev, 2010,16 : 147 - 155.
  • 7Clouet J, Vinatier C, Merceron C. The intervertebral disc: from patho-physiology to tissue engineering[ J]. Joint Bone Spine ,2009,76:614 -618.
  • 8Vacanti JP, Langer R. Tissue engineering: the design and fabrication of living replacement devices for surgical reconstruction and trans- plantation[ J]. Lancet, 1999,354 : 132 - 134.
  • 9Langer R. Tissue engineering : a new field and its challenges [ J ]. Pharm Res, 1997,14 : 840 - 841.
  • 10Marler J, Upton J, Langer R, et al. Transplantation of cells in matrices for tissue regeneration [ J]. Adv Drug Deliv Rev, 1998,33 : 165 - 182.

共引文献4

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部