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Authors: Beck, Simone
Schultze, Jennifer
Räder, Hans-Joachim
Holm, Regina
Schinnerer, Meike
Barz, Matthias
Koynov, Kaloian
Zentel, Rudolf
Title: Site-specific DBCO modification of DEC205 antibody for polymer conjugation
Online publication date: 23-Jan-2019
Language: english
Abstract: The design of multifunctional polymer-based vectors, forming pDNA vaccines, offers great potential in cancer immune therapy. The transfection of dendritic immune cells (DCs) with tumour antigen-encoding pDNA leads to an activation of the immune system to combat tumour cells. In this work, we investigated the chemical attachment of DEC205 antibodies (aDEC205) as DC-targeting structures to polyplexes of P(Lys)-b-P(HPMA). The conjugation of a synthetic block copolymer and a biomacromolecule with various functionalities (aDEC205) requires bioorthogonal techniques to avoid side reactions. Click chemistry and in particular the strain-promoted alkyne-azide cycloaddition (SPAAC) can provide the required bioorthogonality. With regard to a SPAAC of both components, we firstly synthesized two different azide-containing block copolymers, P(Lys)-b-P(HPMA)-N3(stat) and P(Lys)-b-P(HPMA)-N3(end), for pDNA complexation. In addition, the site-specific incorporation of ring-strained dibenzocyclooctyne (DBCO) moieties to the DEC205 antibody was achieved by an enzymatic strategy using bacterial transglutaminase (BTG). The chemical accessibility of DBCO molecules within aDEC205 as well as the accessibility of azide-functionalities on the polyplex’ surface were investigated by various SPAAC experiments and characterized by fluorescence correlation spectroscopy (FCS).
DDC: 540 Chemie
540 Chemistry and allied sciences
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 09 Chemie, Pharmazie u. Geowissensch.
Place: Mainz
URN: urn:nbn:de:hebis:77-publ-588003
Version: Published version
Publication type: Zeitschriftenaufsatz
License: CC BY
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Journal: Polymers
Pages or article number: Art. 141
Publisher: MDPI
Publisher place: Basel
Issue date: 2018
ISSN: 2073-4360
Publisher URL:
Publisher DOI: 10.3390/polym10020141
Appears in collections:JGU-Publikationen

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