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一种将肽配体的末端胺与胆固醇偶联的新方法:合成iRGD-胆固醇。

A novel method for conjugating the terminal amine of peptide ligands to cholesterol: synthesis iRGD-cholesterol.

作者信息

Fete Matthew G, Betker Jamie L, Shoemaker Richard K, Anchordoquy Thomas J

机构信息

School of Pharmacy, Rueckert-Hartman College, Regis University, 3333 Regis Blvd, Denver, CO 80221 USA.

Skaggs School of Pharmacy & Pharmaceutical Sciences, University of Colorado, 12850 E. Montview Blvd, Aurora, CO 80045 USA.

出版信息

Ther Deliv. 2019 Jan;10(1):11-20. doi: 10.4155/tde-2018-0057.

Abstract

AIM

Conventional conjugation reactions often involve the use of activated PEG as a linker, but concerns about PEG-mediated reduction in intracellular delivery and enhanced immunogenicity have generated interest in developing methods that eliminate the need for a PEG linker.

MATERIALS & METHODS: Reaction conditions were identified that specifically couples the terminal amine of a cyclic iRGD peptide (CRGDRGPDC) to the hydroxyl moiety of cholesterol through a short carbamate linker.

RESULTS & CONCLUSION: Using this method for synthesizing iRGD-cholesterol, peptide ligands can be incorporated into lipid-based delivery systems, thereby eliminating concerns about adverse reactions to PEG. Toxicity and stability data indicate low toxicity and adequate serum stability at low ligand levels.

摘要

目的

传统的共轭反应通常涉及使用活化的聚乙二醇(PEG)作为连接子,但对PEG介导的细胞内递送减少和免疫原性增强的担忧引发了人们对开发无需PEG连接子的方法的兴趣。

材料与方法

确定了反应条件,通过短氨基甲酸酯连接子将环化整合素靶向配体iRGD肽(CRGDRGPDC)的末端胺与胆固醇的羟基部分特异性偶联。

结果与结论

使用这种合成iRGD-胆固醇的方法,肽配体可以被整合到基于脂质的递送系统中,从而消除了对PEG不良反应的担忧。毒性和稳定性数据表明,在低配体水平下具有低毒性和足够的血清稳定性。

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