Synthesis of GnRH analogues and their application in targeted gene delivery systems
摘要:
A set of GnRH analogues containing the nuclear localization signal (NLS) of the SV-40 virus was synthesized using solid phase peptide synthesis and chemical ligation techniques. Selective chemical ligation was achieved through hydrazone formation upon the interaction of NLS hydrazide and GnRH analogue modified with pyruvic acid. The efficiency of the synthesized compounds was demonstrated in experiments on transfection of various human cancer cell lines with reporter luciferase and beta-galactosidase genes, as well as suicide thymidine kinase gene of HSV-1. Selectivity of the peptide-DNA complex effect on cancer cells is achieved as a result of its penetration through the cell membrane via GnRH receptor-mediated endocytosis pathway.
Convenient method of peptide hydrazide synthesis using a new hydrazone resin
作者:Pavel S. Chelushkin、Ksenia V. Polyanichko、Maria V. Leko、Marina Yu. Dorosh、Thomas Bruckdorfer、Sergey V. Burov
DOI:10.1016/j.tetlet.2014.12.056
日期:2015.1
Peptide hydrazides can be easily synthesized using a new hydrazone resin, obtained via acylation of aminomethyl polystyrene by Fmoc-hydrazone of pyruvic acid. It was shown that the hydrazone linker is completely stable in the course of standard Fmoc SPPS. Moreover, it can tolerate a treatment with 5% TFA/DCM thus permitting selective removal of Mtt or related acid-labile protecting groups. Subsequent