A novel poly（d, /-lactic acid） （PDLLA） based biomimetic polymer was synthesized by grafting maleic anhydride, butanediamine and arg-gly-asp-ser （RGDS） peptides onto the backbone of PDLLA, aiming to overcome the ...A novel poly（d, /-lactic acid） （PDLLA） based biomimetic polymer was synthesized by grafting maleic anhydride, butanediamine and arg-gly-asp-ser （RGDS） peptides onto the backbone of PDLLA, aiming to overcome the acidity and auto-accelerating degradation of PDLLA during degradation and to improve its biospecificity and biocompatibility. The synthetic copolymer was characterized by FTIR, ^13C NMR and amino acid analyzer （AAA）.展开更多
In an attempt to demonstrate the biological activities of a short peptide.Arg-Gly-Asp- Ser (RGDS) was synthesized and used for bioassay,The data obtained here proved that RGDS ob- viously inhibited PAF- and/or ADP-ind...In an attempt to demonstrate the biological activities of a short peptide.Arg-Gly-Asp- Ser (RGDS) was synthesized and used for bioassay,The data obtained here proved that RGDS ob- viously inhibited PAF- and/or ADP-induced platelet aggregation.The present paper revealed that RG- DS had vasodilative action and the cGMP accumulation may be one of the mechanisms of RGDS exer- ting bioactivities.展开更多
目的探讨去细胞牛颈静脉血管经氨等离子表面改性后接枝甘氨酸-精氨酸-甘氨酸-天冬氨酸-丝氨酸-脯氨酸-赖氨酸(GRGDSPK)肽的可行性及效果。方法A组:去细胞牛颈静脉经过氨等离子预处理后与GRGDSPK肽在液相溶液中作用;B组:去细胞牛颈静脉...目的探讨去细胞牛颈静脉血管经氨等离子表面改性后接枝甘氨酸-精氨酸-甘氨酸-天冬氨酸-丝氨酸-脯氨酸-赖氨酸(GRGDSPK)肽的可行性及效果。方法A组:去细胞牛颈静脉经过氨等离子预处理后与GRGDSPK肽在液相溶液中作用;B组:去细胞牛颈静脉直接与GRGDSPK肽在液相溶液中作用。连续震荡漂洗条件下,激光共聚焦显微镜观察0 h、4 h GRGDSPK肽在2组材料表面的分布特征。结果在溶液作用下,随时间延长,氨等离子处理接枝荧光GRGDSPK-FITC肽的牛颈静脉血管表面肽荧光未见丧失;而物理吸附GRGDSPK-FITC肽荧光显著丧失。结论氨等离子表面改性技术用于生物衍生材料去细胞牛颈静脉可取得良好的效果。展开更多
基金This study was supported by the National Natural Science Foundation of China(No.30270395 and 30300084)the National"863"Project(No.2003AA32X210).
文摘A novel poly（d, /-lactic acid） （PDLLA） based biomimetic polymer was synthesized by grafting maleic anhydride, butanediamine and arg-gly-asp-ser （RGDS） peptides onto the backbone of PDLLA, aiming to overcome the acidity and auto-accelerating degradation of PDLLA during degradation and to improve its biospecificity and biocompatibility. The synthetic copolymer was characterized by FTIR, ^13C NMR and amino acid analyzer （AAA）.
基金This project was supported by the National Natural Science Foundation
文摘In an attempt to demonstrate the biological activities of a short peptide.Arg-Gly-Asp- Ser (RGDS) was synthesized and used for bioassay,The data obtained here proved that RGDS ob- viously inhibited PAF- and/or ADP-induced platelet aggregation.The present paper revealed that RG- DS had vasodilative action and the cGMP accumulation may be one of the mechanisms of RGDS exer- ting bioactivities.
文摘目的探讨去细胞牛颈静脉血管经氨等离子表面改性后接枝甘氨酸-精氨酸-甘氨酸-天冬氨酸-丝氨酸-脯氨酸-赖氨酸(GRGDSPK)肽的可行性及效果。方法A组:去细胞牛颈静脉经过氨等离子预处理后与GRGDSPK肽在液相溶液中作用;B组:去细胞牛颈静脉直接与GRGDSPK肽在液相溶液中作用。连续震荡漂洗条件下,激光共聚焦显微镜观察0 h、4 h GRGDSPK肽在2组材料表面的分布特征。结果在溶液作用下,随时间延长,氨等离子处理接枝荧光GRGDSPK-FITC肽的牛颈静脉血管表面肽荧光未见丧失;而物理吸附GRGDSPK-FITC肽荧光显著丧失。结论氨等离子表面改性技术用于生物衍生材料去细胞牛颈静脉可取得良好的效果。
