Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 503540
Title Synthesis and systematic evaluation of symmetric sulfonated centrally C-C bonded cyanine near-infrared dyes for protein labelling
Author(s) Wal, Steffen Van Der; Kuil, Joeri; Valentijn, A.R.P.M.; Leeuwen, Fijs W.B. Van
Source Dyes and Pigments 132 (2016). - ISSN 0143-7208 - p. 7 - 19.
Department(s) BioNanoTechnology
Publication type Refereed Article in a scientific journal
Publication year 2016
Keyword(s) Conjugation - Fluorescence - Image guided surgery - Stability - Stacking

The most commonly used near-infrared cyanine dyes contain an aryl ether that is not fully stable towards nucleophiles. Replacement of the aryl ether by a more stable carbon-carbon bond can improve the stability. In this work we have synthesized a series of four negatively-charged symmetrical C-C bond-containing Cy7 derivatives and compared them to the known dyes indocyanine green (ICG) and IRDye 800CW. The extent of stacking of these C-C bond-containing dyes was higher than reported for aryl ether dyes, but stacking could be minimized by altering the surface charge of the molecules and by introducing sulfonate groups. Furthermore, the degree of stacked dye in an antibody-dye conjugate was similar to the degree of stacking of free dye under labeling conditions. In our view, C-C bond-containing Cy7 dyes provide a chemical platform, based on which one can improve the photophysical properties and stacking behavior, thereby generating interesting additions to the conjugation toolbox available for e.g. antibodies.

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