Introducing D-amino acid or simple glycoside into small peptides to enable supramolecular hydrogelators to resist proteolysis.

Introducing D-amino acid or simple glycoside into small peptides to enable supramolecular hydrogelators to resist proteolysis.
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DOI:
10.1021/la302583a
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发表时间:
2012-09-18
期刊:
Langmuir : the ACS journal of surfaces and colloids
影响因子:
--
通讯作者:
Xu B
Xu B
中科院分区:
其他
文献类型:
--
作者:
Li X;Du X;Li J;Gao Y;Pan Y;Shi J;Zhou N;Xu B

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在这里,我们报告了两种方便的策略,使用D-氨基酸残基或糖苷片段,以增加基于小肽的超分子水凝胶的蛋白水解性。我们的结果表明,在多肽中引入D-氨基酸或糖苷显著增加了水凝胶剂对强大的内肽酶K的抵抗力。然而,D-氨基酸的插入导致水凝胶的存储模数相对较低,这可能是由于分子组装的超结构被破坏所致。相反,在多肽的C-端引入糖苷提高了水凝胶的生物稳定性,而不会显著降低水凝胶的存储模数。这项工作表明,在水凝胶剂中加入一种简单的糖原是提高其生物稳定性的一种有用的方法,从这项工作中获得的理解可能最终导致开发用于需要长期生物稳定性的生物医学应用的功能性多肽水凝胶。
Here we report the examination of two convenient strategies, the use of a D-amino acid residue or a glycoside segment, for increasing the proteolytic resistance of supramolecular hydrogelators based on small peptides. Our results show that the introduction of D-amino acid or glycoside to the peptides significantly increases the resistance of the hydrogelators against proteinase K, a powerful endopeptidase. The insertion of D-amino acid in the peptide backbone, however, results relatively low storage moduli of the hydrogels, likely due to the disruption of the superstructures of the molecular assembly. In contrast, the introduction of a glycoside to the C-terminal of peptide enhances the biostability of the hydrogelators without the significant decrease of the storage moduli of the hydrogels. This work suggests that the inclusion of a simple glycogen in hydrogelators is a useful approach to increase their biostability, and the gained understanding from the work may ultimately lead to development of hydrogels of functional peptides for biomedical applications that require long-term biostability.
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