Morphology of spinal cord extracellular matrix-derived acellular scaffolds fabricated in rats

Acellular peripheral allograft scaffolds can be fabricated using chemical extraction techniques,but methods for producing acellular scaffold derived from spinal cord tissue are not currently available.The present study demonstrated that chemical extraction using Triton X-100 and sodium deoxycholate could be used to completely remove the cells,axons and neural sheaths in spinal cord extracellular matrix-derived scaffolds.The matrix fibers were longitudinally arranged in a wave-like formation,and were connected by fiber junctions.Lattice-shaped fiber cages appeared and developed into bone trabecula-like changes.The natural structure of matrix fibers in the scaffolds was maintained;this helps to guide the differentiation and migration of implanted stem cells.Decellularized spinal cord extracellular matrix-derived scaffolds can provide an ideal substance for fabricating tissue-engineered spinal cord.

Dynamic culture of a thermosensitive collagen hydrogel as an extracellular matrix improves the construction of tissue-engineered peripheral nerve

Tissue engineering technologies offer new treatment strategies for the repair of peripheral nerve injury, hut cell loss between seeding and adhesion to the scaffold remains inevitable. A thermosensitive collagen hydrogel was used as an extracellular matrix in this study and combined with bone marrow mesenchymal stem cells to construct tissue-engineered peripheral nerve composites in vitro. Dynamic culture was performed at an oscillating frequency of 0.5 Hz and 35° swing angle above and below the horizontal plane. The results demonstrated that bone marrow mesenchymal stem cells formed membrane-like structures around the poly-L-lactic acid scaffolds and exhibited regular alignment on the composite surface. Collagen was used to fill in the pores, and seeded cells adhered onto the poly-L-lactic acid fibers. The DNA content of the bone marrow mesenchymal stem cells was higher in the composites constructed with a thermosensitive collagen hydrogel compared with that in collagen I scaffold controls. The cellular DNA content was also higher in the thermosensitive collagen hydrogel composites constructed with the thermosensitive collagen hydrogel in dynamic culture than that in static culture. These results indicate that tissue-engineered composites formed with thermosensitive collagen hydrogel in dynamic culture can maintain larger numbers of seeded cells by avoiding cell loss during the initial adhe-sion stage. Moreover, seeded cells were distributed throughout the material.

组织工程技术修复颞下颌关节:问题与挑战

背景:颞下颌关节疾病的传统疗法受限于疾病严重程度和个体差异。相比之下,组织工程作为一种新兴治疗方法,可以根据患者具体情况定制个性化治疗方案,减少手术过程中的不确定性,提高治疗效果。目的:综述组织工程修复颞下颌关节的最新研究成果和进展。方法:以“颞下颌关节,组织工程,种子细胞,支架,生长因子,动物模型”为中文检索词,以“temporomandibular joint,tissue engineering,seed cell,scaffold,growth factor,animal model”为英文检索词,分别在PubMed数据库和中国知网进行文献检索,检索时限为各数据库建库时间至2024年3月。通过分析和阅读文献进行筛选,按照排除筛选标准纳入文献,最终纳入57篇文献进行综述。结果与结论:(1)随着生物学、材料学与工程学等技术的发展,颞下颌关节组织工程己取得较大进展,例如种子细胞的筛选、新型支架的开发、生长因子作用机制的探索、多种动物模型的构建等,目前大多数研究尚处于体外实验阶段,动物实验等体内研究尚未大规模开展,组织工程修复颞下颌关节的临床应用还需更多证据支持。(2)尽管颞下颌关节组织工程研究仍存在许多问题和挑战等待解决,依然展现出广阔的临床应用前景,有望在将来成为颞下颌关节疾病出色高效的治疗方式。

Smart scaffolds in bone tissue engineering: A systematic review of literature

AIM: To improve osteogenic differentiation and attachment of cells.METHODS: An electronic search was conducted inPub Med from January 2004 to December 2013. Studies which performed smart modifications on conventional bone scaffold materials were included. Scaffolds with controlled release or encapsulation of bioactive molecules were not included. Experiments which did not investigate response of cells toward the scaffold(cell attachment, proliferation or osteoblastic differentiation) were excluded. RESULTS: Among 1458 studies, 38 met the inclusion and exclusion criteria. The main scaffold varied extensively among the included studies. Smart modifications included addition of growth factors(group Ⅰ-11 studies), extracellular matrix-like molecules(group Ⅱ-13 studies) and nanoparticles(nano-HA)(group Ⅲ-17 studies). In all groups, surface coating was the most commonly applied approach for smart modification of scaffolds. In group I, bone morphogenetic proteins were mainly used as growth factor stabilized on polycaprolactone(PCL). In group Ⅱ, collagen 1 in combination with PCL, hydroxyapatite(HA) and tricalcium phosphate were the most frequent scaffolds used. In the third group, nano-HA with PCL and chitosan were used the most. As variable methods were used, a thorough and comprehensible compare between the results and approaches was unattainable.CONCLUSION: Regarding the variability in methodology of these in vitro studies it was demonstrated that smart modification of scaffolds can improve tissue properties.

生物医用支架仿生设计及在组织工程中的应用

背景:基于解剖学对生物组织功能与结构的认识,对于具有恢复、维持或改善组织功能的生物活性材料仿生设计是目前再生医学领域研究的热点。目的:从生物医用支架的机械性能、三维空间结构和生化活性对细胞行为的影响进行讨论,并综述生物医用支架在组织工程领域的应用。方法:应用计算机检索中国知网、万方、Web of Science、PubMed数据库2003年1月至2023年4月发表的文献,中文检索词为“细胞外基质,组织工程,支架,生物材料,仿生结构,机械性能,三维结构,腱骨界面,骨软骨,神经导管,人造血管”;英文检索词为“extracellular matrix,tissue engineering,scaffolds,biomimetic structures,biomaterials,tendon bone interfaces,osteochondral,neural conduits,artificial blood vessels”。结果与结论:细胞处在一个复杂且动态变化的三维环境中,因此细胞外基质是生物材料模拟的最终目标,在设计生物医用支架的仿生结构时需要与其所处真实的微环境相似,让细胞可以正常地贴壁、生长和迁移,并保持其多样的生理功能。生物医用支架在机械性能、三维空间结构以及生物化学性质方面对细胞外基质的仿生设计可以对组织修复过程中的细胞起到决定性作用,从而影响组织修复最后的结果。进行仿生设计的生物医用支架在腱骨界面、骨软骨界面、神经、血管再生等领域已有广泛的应用,在临床上提供了一个有前途的新思路。

静电纺丝技术在神经组织工程中的应用进展

壳聚糖、丝素蛋白、聚己内酯和聚乳酸-羟基乙酸共聚物等生物材料可通过静电纺丝技术制备成神经组织工程支架。此类支架具有生物相容性较好、可降解、比表面积大和孔隙率高等优良特点,可通过仿生细胞外基质结构、负载神经营养药物和结合电刺激等促进受损神经再生,因此在神经组织工程中备受关注。本文对常用于神经组织工程的静电纺丝材料以及静电纺丝技术在神经组织工程中的应用进行综述。

大鼠心肌细胞H9C2多元复合支架的制备及优选

目的制备大鼠心肌细胞H9C2的聚己内酯(PCL)/壳聚糖(CS)多元复合支架,并优选有利于H9C2细胞生长的支架。方法通过静电纺丝法制备PCL/CS支架(支架A)、PCL/CS/氧化锌(ZnO)支架(支架B)、PCL/CS/ZnO/碳纳米管(CNTs)支架(支架C)三种多元复合支架,采用X射线衍射(XRD)、傅里叶红外光谱(FTIR)、热重分析(TG)、拉曼光谱测试等方法验证支架制备是否成功,采用电镜观察及拉伸应力、水接触角、电导率、膨胀率检测等方法评估三种支架的理化特性,采用DAPI染色、电镜观察、CCK-8实验等方法评估三种支架的生物相容性。结果XRD、FTIR、TG、拉曼光谱测试结果显示三种支架制备成功。电镜观察结果显示支架C的纤维直径显著长于支架A、B(F=73.050,t=8.724、9.747,P<0.05);拉伸应力测试结果显示支架B的拉伸应力显著高于支架A、C(F=13.833,t=3.641、3.802,P<0.05);水接触角检测结果显示三种支架皆亲水;电导率测试结果显示支架B、C的电导率显著高于支架A(F=798.780,t=32.155、30.048,P<0.05);膨胀率测试结果显示,在PBS缓冲液中浸泡后,支架A第5小时膨胀率显著高于第0.5小时(F组内=53.103,P<0.05),支架C在第2~5小时中各时间点膨胀率显著高于第0.5小时(F组内=103.748,P<0.05);在第0.5~4小时中各时间点,支架A膨胀率显著高于支架B、C,在第0.5~2小时中各时间点,支架B膨胀率显著高于支架C(F组间=35.226~162.448,P<0.05)。DAPI染色及电镜图像结果显示,在三种支架上培养96 h以后,支架B、C表面H9C2细胞数量较支架A增多。CCK-8实验结果显示,支架A、B、C表面H9C2细胞在第18小时~第5天中各时间点的吸光度值均显著高于第12小时(F组内=37.159~67.083,P<0.05);在第12小时~第5天各时间点,支架C表面H9C2细胞的吸光度值均显著高于支架A、B(F组间=26.039~80.994,P<0.05)。结论大鼠心肌细胞H9C2的多元复合支架符合细胞外基质特征,能够支持心肌细胞生长,其中PCL/CS/ZnO/CNTs支架显示出较高的生物相容性,比纯PCL/CS支架在心脏组织工程中更具应用潜力。

In vitro cartilage production using an extracellular matrix-derived scaffold and bone marrow-derived mesenchymal stem cells

Background Cartilage repair is a challenging research area because of the limited healing capacity of adult articular cartilage.We had previously developed a natural,human cartilage extracellular matrix （ECM）-derived scaffold for in vivo cartilage tissue engineering in nude mice.However,before these scaffolds can be used in clinical applications in vivo,the in vitro effects should be further explored.Methods We produced cartilage in vitro using a natural cartilage ECM-derived scaffold.The scaffolds were fabricated by combining a decellularization procedure with a freeze-drying technique and were characterized by scanning electron microscopy （SEM）,micro-computed tomography （micro-CT）,histological staining,cytotoxicity assay,biochemical and biomechanical analysis.After being chondrogenically induced,the induction results of BMSCs were analyzed by histology and Immunohisto-chemistry.The attachment and viability assessment of the cells on scaffolds were analyzed using SEM and LIVE/DEAD staining.Cell-scaffold constructs cultured in vitro for 1 week and 3 weeks were analyzed using histological and immunohistochemical methods.Results SEM and micro-CT revealed a 3-D interconnected porous structure.The majority of the cartilage ECM was found in the scaffold following the removal of cellular debris,and stained positive for safranin O and collagen Ⅱ.Viability staining indicated no cytotoxic effects of the scaffold.Biochemical analysis showed that collagen content was （708.2±44.7）μg/mg,with GAG （254.7±25.9） μg/mg.Mechanical testing showed the compression moduli （E） were （1.226±0.288） and （0.052±0.007） MPa in dry and wet conditions,respectively.Isolated canine bone marrow-derived stem cells （BMSCs） were induced down a chondrogenic pathway,labeled with PKH26,and seeded onto the scaffold.Immunofluorescent staining of the cell-scaffold constructs indicated that chondrocyte-like cells were derived from seeded BMSCs and excreted ECM.The cell-scaffold constructs contained pink,smooth and translucent cartilage-like tissue after 3 weeks of culture.We observed evenly distributed cartilage ECM proteoglycans and collagen type Ⅱ around seeded BMSCs on the surface and inside the pores throughout the scaffold.Conclusion This study stuggests that a cartilage ECM scaffold holds much promise for in vitro cartilage tissue engineering.

Evaluation of an extracellular matrix-derived acellular biphasic scaffold/cell construct in the repair of a large articular high-load-bearing osteochondral defect in a canine model

Osteochondral lesion repair is a challenging area of orthopedic surgery. Here we aimed to develop an extracellular matrix-derived, integrated, biphasic scaffold and to investigate the regeneration potential of the scaffold loaded with chondrogenically-induced bone marrow-derived mesenchymal stem cells （BMSCs） in the repair of a large, high-load-bearing, osteochondral defect in a canine model. Methods The biphasic scaffolds were fabricated by combining a decellularization procedure with a freeze-drying technique and characterized by scanning electron microscopy （SEM） and micro-computed tomography （micro-CT）. Osteochondral constructs were fabricated in vitro using chondrogenically-induced BMSCs and a biphasic scaffold, then assessed by SEM for cell attachment. Osteochondral defects （4.2 mm （diameter） ×6 mm （depth）） were created in canine femoral condyles and treated with a construct of the biphasic scaffold/chondrogenically-induced BMSCs or with a cell-free scaffold （control group）. The repaired defects were evaluated for gross morphology and by histological, biochemical, biomechanical and micro-CT analyses at 3 and 6 months post-implantation. Results The osteochondral defects of the experimental group showed better repair than those of the control group. Statistical analysis demonstrated that the macroscopic and histologic grading scores of the experimental group were always higher than those of the control group, and that the scores for the experimental group at 6 months were significantly higher than those at 3 months. The cartilage stiffness in the experimental group （6 months） was （6.95±0.79） N/mm, 70.77% of normal cartilage; osteochondral bone stiffness in the experimental group was （158.16±24.30） N/mm, 74.95% of normal tissue; glycosaminoglycan content of tissue-engineered neocartilage was （218±21.6） tJg/mg （dry weight）, 84.82% of native cartilage. Micro-CT analysis of the subchondral bone showed mature trabecular bone regularly formed at 3 and 6 months, with no significant difference between the experimental and control groups. Conclusion The extracellular matrix-derived, integrated, biphasic scaffold shows potential for the repair of large, high-load-bearing osteochondral defects.

嗅鞘细胞/细胞外基质夹层支架的制备和形态学观察

目的研究嗅粘膜嗅鞘细胞在细胞外基质夹层支架内的生长特性,为治疗神经系统损伤寻找新的移植供体。方法嗅鞘细胞/细胞外基质夹层支架由四层毯状细胞外基质支架和三层嗅粘膜嗅鞘细胞相间叠加构成。纤维蛋白原、层粘连蛋白和纤粘连蛋白按一定比例混合后,在新鲜大鼠血浆促凝作用下,构建单层毯状细胞外基质支架,在支架表面种植嗅粘膜来源的嗅鞘细胞。于倒置显微镜下观察嗅鞘细胞在支架上/内的生长过程,培养3d后,在细胞表面再次滴加上述细胞外基质混合胶以构建第二层毯状支架,依次重复两次。夹层支架制成组织切片和超薄切片后,用光镜和电镜观察和分析夹层支架的内部结构以及嗅鞘细胞在支架内的生长情况。结果由顶层至底层,支架内的嗅鞘细胞数量逐渐增多,细胞突起逐渐延长,细胞内分泌颗粒逐渐增多及其电子密度逐渐增高;细胞可在支架之间迁移,其水平排列方向具有一致性;嗅鞘细胞的细胞膜可与支架紧密粘附,支架内局部区域出现组织间隙。结论嗅粘膜嗅鞘细胞可在细胞外基质夹层支架内正常增殖和分化,细胞与支架具有良好的组织相容性。该夹层支架可作为嗅鞘细胞三维生长的载体,用于移植治疗神经损伤。

体内移植羊膜对家兔肌腱损伤模型肌腱愈合的影响

研究的目的在于观察羊膜体内移植对肌腱损伤修复的影响。60只跟腱损伤家兔动物模型采用同体对照动物实验方法,大体观察伤口愈合、肌腱粘连及肌腱肥大情况,并分别于术后第2、4、6周等3个时间点取跟腱,HE染色观察损伤区域炎细胞浸润和成纤维细胞数量,免疫组化染色观察胶原纤维排列塑形状况,拉伸试验测定肌腱弹性模量。另取4只家兔不做肌腱切断术作为正常对照,在第0周测定肌腱弹性模量。全部实验动物皮肤切口在术后1周内基本愈合,未发生伤口感染情况。羊膜实验组跟腱粘连动物数量和肌腱断裂区域肥大程度低于阴性对照组(P<0.05)。术后第2周,两组动物炎症反应均达到最高值,但羊膜实验组炎细胞(包括中性粒细胞和单核细胞)浸润数量低于阴性对照组(P<0.05)。两组实验动物样本中成纤维细胞数量和胶原纤维积累数量无明显差异(P>0.05),但羊膜实验组成纤维细胞和胶原纤维排列更具有序性,尤其是在术后第6周,明显好于阴性对照组。术后第2周和第4周,羊膜实验组肌腱弹性模量均优于阴性对照组(P<0.05)。羊膜具有促进肌腱早期愈合和抗炎、抗粘连作用。

小口径组织工程血管脱细胞生物支架材料的研究

目的探索利用生物酶类联合消化法制备猪颈总动脉脱细胞基质材料的方法,为小口径组织工程血管提供理想的生物支架材料。方法利用胰酶和核酸酶连续消化法脱除成年猪颈总动脉的细胞成分;通过组织学染色和定量DNA分析,检测细胞及细胞碎片的去除情况;利用扫描电镜观察脱细胞支架材料的空间结构和细胞去除情况。结果组织学染色结果显示,制备的猪颈总动脉脱细胞支架材料不含有细胞成分,细胞外基质成分没有明显的改变,保留了脱细胞前动脉的空间结构;DNA定量分析结果显示,支架材料的DNA含量小于0.1%;扫描电镜结果显示,支架材料的内表面完全去除了内皮细胞成分,显示出良好的三维空间结构。结论利用胰酶和核酸酶连续生物酶消化法制备的猪颈总动脉细胞外基质支架材料中细胞成分去除完全,细胞外基质的空间结构保持良好,制备的支架材料符合小口径组织工程血管对生物支架材料的基本要求。

猪来源关节软骨脱细胞支架的生物安全性研究

目的评价猪来源关节软骨脱细胞支架的生物安全性。方法取猪四肢关节软骨,分别制备脱细胞和未脱细胞软骨支架。在人软骨细胞中分别加入浓度为100%、50%、25%的脱细胞软骨支架浸提液[无血清DMEM培养液与支架表面积按1ml:(3～6)cm2比例混合,37℃静置72h],计算相对增殖率,判定其体外细胞毒性。0.9%NaCl与支架表面积按1ml:(3～6)cm2比例混合,37℃静置72h制备脱细胞软骨支架浸提液,分别用于全身急性毒性实验(小白鼠)、溶血实验、热原检测实验、皮内刺激实验(大白兔),分别观察其体内毒性、溶血程度、热原和刺激情况。在大白兔体内分别埋植脱细胞软骨支架与未脱细胞软骨支架,观察炎症反应和细胞免疫情况。结果猪脱细胞软骨支架浸提液对细胞生长无抑制作用,无细胞毒性。注射支架浸提液后小白鼠一般情况良好,无全身急性毒性反应。支架浸提液溶血程度为1.3%,无溶血作用。支架浸提液无热原存在且原发刺激指数为0分,皮内刺激实验阴性。脱细胞软骨支架与未脱细胞软骨支架相比免疫原性小,无炎症反应和淋巴细胞浸润。结论猪来源关节软骨脱细胞支架具有良好的生物相容性,将有可能成为理想的天然生物材料,具有良好的应用前景。

猪胆总管脱细胞支架的制备及组织学评价

目的用不同的脱细胞方法对猪胆总管进行处理,比较脱细胞前后的组织学变化,筛选适宜的脱细胞方法,为组织工程胆管支架材料的应用提供理论依据。方法 30例猪胆总管随机分为5组:对照组(A组):0.05%胰蛋白酶+核酸酶(B组):0.1%十二烷基硫酸钠(SDS)+核酸酶(C组):1.0%Triton X-100+核酸酶(D组):1.0%Triton X-100+0.1%SDS+核酸酶(E组)。通过HE染色光学显微镜下观察脱细胞基质的组织结构和细胞残留情况;用紫外分光光度法检测脱细胞基质的DNA含量,计算脱细胞率。结果脱细胞B组有少量细胞残留,纤维有损伤;脱细胞C组、D组、E组的细胞均被去除,纤维无明显损伤。A组的DNA含量为(71.24±2.56)μg/100 mg。B、C、D、E4个脱细胞组的DNA含量与A组的差异有统计学意义(F=15.29,P<0.01),均有明显的脱细胞效果(P<0.01)。B组的脱细胞率为77.03%,比C组、D组、E组的脱细胞效果稍差(P<0.05),E组的脱细胞率高达99.03%。结论应用1.0%Triton X-100+0.1%SDS+核酸酶的脱细胞效果好,能更好地降低胆总管的免疫原性,是一种比较理想的猪胆总管脱细胞方法。

卵巢去细胞生物支架的制备及鉴定

目的:通过浸泡加震荡法制备猪部分卵巢组织去细胞生物支架,并对其进行鉴定。方法:健康未成年猪卵巢30个,横切成厚为6 mm的切片,室温条件下,1%SDS溶液浸泡,同时平板震荡器震荡,最后用去离子水清洗其内残留SDS及DNA碎片。获得去细胞卵巢生物支架后,对其进行组织化学染色、DNA残留量定量测定、扫描电镜检查及免疫荧光染色,观察细胞去除情况、支架的三维结构以及细胞外基质中胶原与蛋白质的保留情况。结果:DNA定量分析得出仅15.4%的DNA残留;HE染色、扫描电镜及免疫荧光染色提示支架内未见细胞核残留,并且支架的结构、胶原成分保留较完整。结论:运用浸泡加震荡法能够有效地去除卵巢组织中的细胞成分,并且较完整地保持细胞外基质的支架结构,不同程度地保留一些胶原成分及蛋白质。

Esophagus and regenerative medicine

In addition to squamous cell carcinoma,the incidence of Barrett's esophagus with high-grade dysplasia and esophageal adenocarcinoma is rapidly increasing worldwide.Unfortunately,the current standard of care for esophageal pathology involves resection of the affected tissue,sometimes involving radical esophagectomy.Without exception,these procedures are associated with a high morbidity,compromised quality of life,and unacceptable mortality rates.Regenerative medicine approaches to functional tissue replacement include the use of biological and synthetic scaffolds to promote tissue remodeling and growth.In the case of esophageal repair,extracellular matrix(ECM) scaffolds have proven to be effective for the reconstruction of small patch defects,anastomosis reinforcement,and the prevention of stricture formation after endomucosal resection(EMR).More so,esophageal cancer patients treated with ECM scaffolds have shown complete restoration of a normal,functional,and disease-free epithelium after EMR.These studies provide evidence that a regenerative medicine approach may enable aggressive resection of neoplastic tissue without the need for radical esophagectomy and its associated complications.

三维细胞培养中支架的研究现状

细胞培养技术是生物技术中最核心、最基础的技术,目前常用的二维细胞培养方法,例如,多孔板、烧瓶和培养皿等存在诸多不足和限制,三维细胞培养能够改善细胞局部微环境、促进细胞与细胞、细胞与基质之间的交流,模拟体内生理环境,从而增强细胞功能,在新药研发、肿瘤研究等领域具有广泛应用前景。支架是实现三维细胞培养最常用的手段之一,相当于人工细胞外基质,能够模拟体内组织复杂的三维结构及其主要特征。本文从基于支架的培养体系和无支架的培养体系两方面讨论了三维细胞培养方法,尤其详细介绍了各种支架。

人肝组织脱细胞支架的制备

目的探究人肝组织脱细胞支架的制备。方法本研究利用手术切除的人肝血管瘤左外叶组织,经反复冻融,0.01%SDS、0.1%SDS和1%Triton X-100循环灌注制备人肝组织脱细胞支架,并通过灌注过氧乙酸消毒。将L-02细胞通过门静脉插管种植于脱细胞支架内进行培养。结果 HE、DAPI染色和扫描电镜结果显示脱细胞支架内无细胞成分残留,残余DNA检测为25.3±14.6 ng/mg干质量,小于新鲜肝脏DNA含量的1%。免疫组化证实支架内保留了Ⅰ型胶原、Ⅳ型胶原、纤连蛋白、弹力蛋白成分。L-02细胞在支架上生长良好且有增殖,并表达白蛋白及葡萄糖-6-磷酸酶。结论利用手术切除的人肝标本行肝组织脱细胞支架的制备是可行的,且为构建更适用于临床的组织工程肝脏提供了新思路。

骨组织工程的研究进展和面临的问题

骨缺损修复的移植物按其来源,可分为自体骨、同种异体骨、异种骨等,均存在自身的局限性。组织工程技术有望产生和人体骨类似的骨组织,解决目前骨缺损治疗的局限性。我们针对骨组织工程,就其临床研究进展以及亟待解决的问题进行综述。

利用纤维蛋白胶复合血管脱细胞基质制备全生物型小口径组织工程血管支架材料的研究

目的探讨利用猪纤维蛋白胶复合犬颈总动脉脱细胞基质制备全生物型小口径组织工程血管支架材料的方法。方法将猪纤维蛋白胶均匀复合于犬颈总动脉脱细胞基质的外表面,构建全生物型小口径复合纤维蛋白胶支架材料。通过组织学染色、扫描电镜观察及生物力学测试对复合纤维蛋白胶支架材料的性质进行检测。结果组织学染色结果表明猪纤维蛋白胶均匀分布于犬颈总动脉脱细胞基质的外表面;扫描电镜结果显示复合纤维蛋白胶支架材料的外表面光滑,质地均匀。复合纤维蛋白胶支架材料、脱细胞犬颈总动脉及新鲜犬颈总动脉3组标本的极限拉伸强度和爆裂强度相似,复合纤维蛋白胶支架材料组的轴向顺应性高于脱细胞犬颈总动脉组,而与新鲜犬颈总动脉组的顺应性相似。结论猪纤维蛋白胶可以均匀复合于犬颈总动脉脱细胞基质支架材料上,能够构建出结构均匀的全生物型小口径组织工程血管的支架材料,复合纤维蛋白胶支架材料具有合适的生物力学性质,能够满足小口径组织工程血管对支架材料的要求。