关键词: 丝素蛋白, 生物学评价, 组织工程

Abstract: Abstract:Objective To study the preparation method of compound tissue-engineering scaffolds of the PLA/silk fibroin and evaluate its biological features.Methods The PLA scaffolds matrix were dipped into the silk fibroin solution,then dried,and PLA/silk fibroin scaffolds were prepared. There were two groups in the experiment,one group was PLA group,and the other one was compound scaffolds group.According to ISO-10993 standard, hematolysis test,dynamic coagulation time test, cell toxicity test，stimulation test and pyrogen test were performed in two groups,and the results were compared betwen two groups. Results In the stimulation test，the two kinds of materials had equally not aroused the obvious animal skin stimulation, it showed that the experiment was in accordance with the standard. In the pyrogen test, the two scaffolds material aroused the animal temperature rising without exception under 0.2℃ and the total number of degree was under 1.0℃,therefore there was no obvious difference between two groups. In the hematolysis test, the hemolysis rates of the two scaffolds samples were smaller than 5% equally(P=0.000),which indicated that the hemolysis of the compound scaffolds was better than that of the PLA scaffolds.In the dynamic coagulation time test,the coagulation time of the compound scaffolds(37 min) was longer than that of the PLA scaffolds(26 min). The anti-coagulation ability of the compound scaffolds was better than that of the PLA scaffdds.In the cell toxicity test,the cell growth situation of the compound scaffolds group was obviously better than that of the PLA group, and at the meantime the cell toxicity of the compound scaffolds was obviously smaller than that of the PLA scaffolds. Conclusion The material of PLA/silk fibroin compound scaffolds has the advanced biological consistent compared with the simplex scaffolds.Accordingly,the PLA/silk fibroin can be used as a scaffolds matrix to be transplanted into the body.

Key words: silk fibroin, biological evaluation, tissue engineering