SGBG/PHBV与人牙周膜细胞的生物相容性

摘要

[Objective] The biocompatibility between SGBG/PHBV and human PDLC were investigated to provide a basis for the choice of the scaff material of periodontal tissue engineering.[Methods] Human PDLC were cultured using tissue-explant technique.Seeding on 96 wells plate,9 wells for one group,Four different concentrations (100％,75％,50％,25％,0％) of maceration extract of SGBG/PHBV were added into the culture plantsafter 48-h cell seeding,the grades of the cytotoxicity of SGBG/PHBV was evaluated by MTT assay.Human PDLC cultured in vitro were collected and seeded on the three-dimensional scaffolds of SGBG/PH-BV,the cellular morphology and cell growth on the scaffolds were observed and photographed by scanning electronic microscope.HumanPDLC seeded on the three-dimensional scaffolds of SGBG/PHBV in the experimental group,and human PDLC seeded by DMEM in the control group,after 12-,24-,and 48-h cell seeding,got 27 simples for each group,and the affection of the SGBG/PHBV on cell secretory function was observed by spectrophotometry which assayed the biochemical indexes ALP in supinate.[Results] The grades of the cytotoxicity of SGBG/PHBV were 0 and 1.It was displayed that human PDLC adhered and proliferated well on the scaffold of SGBG/PHBV under the scanning electronic microscope.The significant difference of ALP in supinate between the experimental group and the control group (P ＜ 0.05).[Conclusions] SGBG/PHBV had no cytotoxicity to human PDLC.SGBG/PHBV is potential to further study as the scaffolds of periodontal tissue engineering since it displayed the satisfactory biocompatibility with human PDLC.%[目的]研究溶胶-凝胶生物活性玻璃(SGBG)/聚羟基丁酸戊酸共聚酯(PHBV)与人牙周韧带细胞(PDLC)的生物相容性,为牙周组织工程支架的选择提供依据.[方法]采用组织块法培养原代人PDLC,分为浸提液组和对照组接种于96孔板,每组9孔,分别加入浓度为100％、75％、50％、25％、0％的浸提液,48 h后采用MTT比色分析法的浸提液实验对材料进行毒性评级.采用人PDLC与SGBG/PHBV体外三维培养,扫描电镜下观察细胞形态及生长情况.实验组采用SGBG/PHBV复合培养,对照组采用普通培养基培养,培养12、24、48 h后,每组取27个样本定量检测上清液碱性磷酸酶(ALP)含量.[结果]浸提液培养结果显示:毒性评级为1级和0级.扫描电镜示人PDLC在三维支架上贴附生长均良好.实验组上清液ALP含量高于对照组,差异有统计学意义(P＜0.05).[结论]SGBG/PHBV对人PDLC无毒性,SGBG/PHBV和人PDLC三维培养,表现出良好的生物相容性,有望应用于进一步的牙周组织工程的研究.