[EN] MODIFIED ANTIBODY, ANTIBODY-CONJUGATE AND PROCESS FOR THE PREPARATION THEREOF<br/>[FR] ANTICORPS MODIFIÉ, ANTICORPS-CONJUGUÉ ET PROCÉDÉ DE PRÉPARATION ASSOCIÉ
申请人:SYNAFFIX BV
公开号:WO2014065661A1
公开(公告)日:2014-05-01
The present invention relates to an antibody comprising a GlcNAc-S(A)x substituent, wherein S(A)x is a sugar derivative comprising x functional groups A wherein A is independently selected from the group consisting of an azido group, a keto group and an alkynyl group and x is 1, 2, 3 or 4, wherein said GlcNAc-S(A)x substituent is bonded to the antibody via CI of the N-acetylglucosamine of said GlcNAc-S(A)x substituent, and wherein said N-acetylglucosamine is optionally fucosylated. The invention also relates to an antibody-conjugate, in particular to an antibody- conjugate according to the Formula (20) or (20b), wherein AB is an antibody, S is a sugar or a sugar derivative, D is a molecule of interest, and wherein said N- acetylglucosamine is optionally fucosylated (b is 0 or 1). The invention further relates to a process for the preparation of a modified antibody, to a process for the preparation of an antibody-conjugate, and to said antibody-conjugate for use as a medicament. In addition, the invention relates to a kit of parts comprising an azide-modified antibody and a linker-conjugate, wherein said linker-conjugate comprises a (hetero)cycloalkynyl group and one or more molecules of interest.
Reaction of Oxidized Polysialic Acid and a Diaminooxy Linker: Characterization and Process Optimization Using Nuclear Magnetic Resonance Spectroscopy
作者:G. Joseph Ray、Jürgen Siekmann、Richard Scheinecker、Zhenqing Zhang、Mikhail V. Gerasimov、Christina M. Szabo、Paul Kosma
DOI:10.1021/acs.bioconjchem.6b00336
日期:2016.9.21
glycans on the surface of the target protein. To comprehend the conjugation, unoxidized tetrasialic acid and Neu5Ac were reacted in model reactions with a diaminooxy linker to define the nuclearmagneticresonance (NMR) chemical shifts. Based on these data, we were able to show that, in the case of PSA, the reaction with the linker occurs not only at the expected oxidized end to form an aldoxime but
A carbonyl-selective fluorescence label 5 for the detection of oxidized groups has been synthesized by an expeditious three-step sequence. The fluorophore carbazole and the reactive aminoxy group, which binds to carbonyls as an oxime, were tethered by a diethylene glycol spacer. The label allows detection of minute amounts of oxidized functionalities in oligosaccharides and cellulosics under the relatively harsh conditions of GPC separation, without fluorescence interference with light scattering (MALLS) detection. Synthetic keto sugars have been used to optimize the derivatization reaction.
A novel feric ion-selective rhodamine-based fluorescentchemosensor, which contains a bis-aminoxy chain moiety, has been developed. The multi-dentate binding site of rhodamine fluorophore shows selective detection of ferric iron over other biologically important metal ions in aqueous media and also shows 1:1 binding stoichiometry.