期刊
RSC ADVANCES
卷 4, 期 9, 页码 4427-4434出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ra45190a
关键词
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资金
- Ministry of Education, Science, Culture and Supports of Japan [23245045, 25620169]
- Ministry of Agriculture, Forestry and Fisheries of Japan (Agri-Health Translational Research Project)
- Grants-in-Aid for Scientific Research [26248050, 25620169] Funding Source: KAKEN
The C-13 solid state NMR spectra of the sponge prepared from Bombyx mori silk fibroin with different C-13 labeling sites, [3-C-13]Ser, [3-C-13]Tyr and [3-C-13]Ala were observed in dry and wet states. Here the silk fibroin sponge was prepared using polyethylene) glycol diglycidyl ether (PGDE) as porogen. Two broad peaks assigned to beta-sheet and random coil were observed for each C-13-labeled site in the dry state. Moreover, in the wet state, one additional sharp peak assigned to random coil with high mobility due to the presence of water was observed. When the silk fibroin aqueous solution and PGDE was mixed in the sponge preparation process, the slow structural change from random coil to beta-sheet structure occurs together with decrease in the motion of the silk fibroin backbone chain. The silk fibroin graft with small diameter was prepared with a knitted silk fiber tube coated with this silk fibroin sponge. The high porosity and suture retention strength which are comparable to an ePTFE vascular graft were attained. The excellent results, high patency and high tissue ingrowth, were obtained with the porous silk fibroin graft with small diameter by a rat abdominal aorta implantation experiment.
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