2011
DOI: 10.2310/7290.2011.00005
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Controlled Modulation of Serum Protein Binding and Biodistribution of Asymmetric Cyanine Dyes by Variation of the Number of Sulfonate Groups

Abstract: To assess the suitability of asymmetric cyanine dyes for in vivo fluoro-optical molecular imaging, a comprehensive study on the influence of the number of negatively charged sulfonate groups governing the hydrophilicity of the DY-67x family of asymmetric cyanines was performed. Special attention was devoted to the plasma protein binding capacity and related pharmacokinetic properties. Four members of the DY-67x cyanine family composed of the same main chromophore, but substituted with a sequentially increasing… Show more

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Cited by 40 publications
(43 citation statements)
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“…Because the free dye is rarely found in the lung [44,45], this is a real signal based on the nanoparticles. We assume that the strong signal in the lung is a result of the uptake of nanoparticles by cells of the mononuclear phagocyte system and transportation thereby to this organ.…”
Section: Discussionmentioning
confidence: 98%
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“…Because the free dye is rarely found in the lung [44,45], this is a real signal based on the nanoparticles. We assume that the strong signal in the lung is a result of the uptake of nanoparticles by cells of the mononuclear phagocyte system and transportation thereby to this organ.…”
Section: Discussionmentioning
confidence: 98%
“…Alternatively, renal clearance by excretion via the urine is feasible, as has already been shown for similar free dye molecules, like DY-677. This dye contains three sulphonate groups, like DY682, and therefore carries a negative charge [45]. Another, less probable possibility is the detachment of the dye from the nanoparticles by degradation of the nanoparticles (e.g.…”
Section: Discussionmentioning
confidence: 99%
“…The liver and kidneys show high fluorescence, likely due to clearance of peptide and fluorophore from these organs. Sulfonated cyanine dyes like the Alexa Fluors have been shown to accumulate in and be cleared from the liver (20). We therefore imaged liver sections of treated mice.…”
Section: Resultsmentioning
confidence: 99%
“…The reasons might be that the liver and kidney are both metabolically-active organs (Cieslewicz et al 2013) and almost all peptides have a soluble character (Li et al 2012). Futhermore, asymmetric cyanine dyes accumulate in, and are cleared from, the liver (Hamann et al 2011). The problem can be overcome by conjugating the BRBP1 peptide with long-circulating drug delivery systems.…”
Section: In Vivo and Ex Vivo Nirf Imagingmentioning
confidence: 97%