Characterization of star adhesive sealants based on PEG/dextran hydrogels.

Characterization of star adhesive sealants based on PEG/dextran hydrogels.
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DOI:
10.1002/mabi.200800355
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发表时间:
2009-08-11
影响因子:
4.6
通讯作者:
Edelman ER
Edelman ER
中科院分区:
工程技术3区
文献类型:
--
作者:
Artzi N;Shazly T;Crespo C;Ramos AB;Chenault HK;Edelman ER

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可溶胀的聚乙二醇(PEG)胺:葡聚糖醛复合材料现在正成为一种可控的、生物相容的组织粘合剂。我们解释了天然组织胺的保存如何为PEG提供生物相容性:葡聚糖超过了氰基丙烯酸酯的严格,破坏性的氰化物化学,并且比纤维蛋白胶更好地粘附。材料组成的策略变化允许改善生物相容性和粘附强度。可以定制材料变化,以匹配一系列临床应用的特定组织床的需求。PEG:葡聚糖内聚特性对PEG组分(臂数和固体含量)的变化最敏感,而组织-材料粘附强度主要由葡聚糖中醛的数量决定。粘性生物材料密封伤口,支架组织,并提供药物,但粘附往往与生物相容性相冲突。严格的非特异性化学结合优化了前者,水基系统优化了后者,但两者并不一致。我们解释了如何利用天然胺-醛相互作用的组织粘附和内部凝聚力的复合材料提供了一套新的生物相容性生物材料与控制的粘附。
Swellable polyethylene glycol (PEG) amine:dextran aldehyde composite materials are now emerging as a controlled, biocompatible tissue adhesive. We explain how preservation of natural tissue amines provides biocompatibility for PEG:dextran that exceeds the stringent, destructive cyanide-based chemistry of cyanoacrylates, and adhere far better than fibrin glue. Strategic variations of material composition allow for the improvement of biocompatibility and adhesion strength. Material variations can be tailored to match the needs of specific tissue beds for an array of clinical applications. PEG:dextran cohesive properties are most responsive to variations in the PEG component (number of arms and solid content), while tissue-material adhesion strength are primarily determined by the number of aldehydes in the dextran. Adhesive biomaterials seal wounds, scaffold tissues, and deliver drugs, but adhesion often clashes with biocompatibility. Stringent nonspecific chemical binding optimizes the former, water-based systems the latter, but the two are at odds. We explain how composite materials that harness natural amine-aldehyde interactions for tissue adhesion and internal cohesion provide a novel set of biocompatible biomaterials with controlled adhesion.
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