Retro Diels Alder Reaction as a Cleavable Linker in DNA/RNA Applications
申请人:Agilent Technologies, Inc.
公开号:US20150166596A1
公开(公告)日:2015-06-18
The invention provides a novel approach for reversibly conjugating an oligonucleotide, which includes obtaining an oligonucleotide labeled with a diene moiety and a target entity labeled with a dienophile moiety; heating the oligonucleotide labeled with the diene moiety and the target entity labeled with the dienophile moiety in a solution at a first temperature to effect Diels Alder reaction to produce a conjugate; and heating the conjugate to a second temperature to effect retro Diels Alder reaction to regenerate the oligonucleotide labeled with the diene moiety and the target entity labeled with the dienophile moiety.
[EN] RETRO DIELS ALDER REACTION AS A CLEAVABLE LINKER IN DNA/RNA APPLICATIONS<br/>[FR] RÉACTION DE RÉTRO-DIELS-ALDER COMME LIEUR CLIVABLE DANS DES APPLICATIONS ADN/ARN
申请人:AGILENT TECHNOLOGIES INC
公开号:WO2013176845A1
公开(公告)日:2013-11-28
The invention provides a novel approach for reversibly conjugating an oligonucleotide, which includes obtaining an oligonucleotide labeled with a diene moiety and a target entity labeled with a dienophile moiety; heating the oligonucleotide labeled with the diene moiety and the target entity labeled with the dienophile moiety in a solution at a first temperature to effect Diels Alder reaction to produce a conjugate; and heating the conjugate to a second temperature to effect retro Diels Alder reaction to regenerate the oligonucleotide labeled with the diene moiety and the target entity labeled with the dienophile moiety.
Oligonucleotide conjugation to a cell-penetrating (TAT) peptide by Diels–Alder cycloaddition
作者:Victoria Steven、Duncan Graham
DOI:10.1039/b807843b
日期:——
Modifed oligonucleotides are routinely employed as analytical probes for use in diagnostics, e.g. in the examination of specific RNA sequences for infectious diseases, however, a major limiting factor in oligonucleotide-based diagnostics is poor cellular uptake of naked oligonucleotides. This problem can be overcome by covalent attachment of a so-called âcell-penetrating peptideâ to form an oligonucleotide peptide conjugate. Stepwise solid phase synthesis of such a conjugate is difficult and expensive due to the conflicting chemistries of oligonucleotides and peptides. A simple approach to overcome this is post-synthetic conjugation. DielsâAlder cycloaddition is an attractive methodology for oligonucleotide peptide conjugation; the reaction is fast, chemoselective and the reaction rate is greatly enhanced in aqueous media â ideal conditions for biological moieties. An oligodeoxyribonucleotide sequence has been derivatised with a series of dienes at the 5â²-terminus, using a series of unique dienyl-modified phosphoramidites, and investigation into the effect of diene type on the efficiency of conjugation, using DielsâAlder cycloaddition with a maleimido-derivatised cell-penetrating (TAT) peptide, has been performed. This led to the observation that the optimal diene for conjugation was cyclohexadiene, allowing conjugation of oligodeoxyribonucleotides to a cell-penetrating peptide by DielsâAlder cycloaddition for the first time.