2013
DOI: 10.1016/j.actbio.2013.04.009
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Nanoparticle-induced tight-junction opening for the transport of an anti-angiogenic sulfated polysaccharide across Caco-2 cell monolayers

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Cited by 70 publications
(38 citation statements)
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“…The pKa values of sulfate esters in sulfated fucose are around 1.5 while the pKa value of the carboxylate group in glucuronic acid is about 3.0. At pH 2.0, strong acid protonated the carboxylate ions (-COO − ) in fucoidan, the polyelectrolyte complex of chitosan and fucoidan thus could be rapidly broken down [28]. After chemical modification, the carboxylate group decreased in amount but the sulfonate group increased due to the conjugation of taurine with the glucuronic acid residue of fucoidan.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…The pKa values of sulfate esters in sulfated fucose are around 1.5 while the pKa value of the carboxylate group in glucuronic acid is about 3.0. At pH 2.0, strong acid protonated the carboxylate ions (-COO − ) in fucoidan, the polyelectrolyte complex of chitosan and fucoidan thus could be rapidly broken down [28]. After chemical modification, the carboxylate group decreased in amount but the sulfonate group increased due to the conjugation of taurine with the glucuronic acid residue of fucoidan.…”
Section: Resultsmentioning
confidence: 99%
“…The nanoparticles were usually prepared by adding polyanions into excess amounts of chitosan solution to obtain nanoparticles covered with positively charged chitosan. In recent years, increased attention has been focused on the development of chitosan/fucoidan (CS/FD) complex nanoparticles for drug delivery [24,25,26,27,28,29,30]. Our previous study developed a chitosan/fucoidan (FD) nanoparticle with chitosan dominant at an outer layer.…”
Section: Introductionmentioning
confidence: 99%
“…The preparation of fucoidan-chitosan nanoparticles can be achieved by the ionic crosslinking method due to ionic bonds linking one polymer chain to another. In this procedure, solutions of fucoidan are added to chitosan solutions by flush mixing using a pipette tip with ultrasonic vibration in an ice bath [120][121][122][123]. Through this technique, it is also possible to achieve entrapment efficiencies of 90%, with sizes up to 500 nm due to a wider entangling of the molecular chains.…”
Section: Preparation Methods Of Fucoidan-chitosan Nanoparticlesmentioning
confidence: 99%
“…However, the pH-responsive profile of fucoidan-chitosan nanoparticles prevents degradation under acidic conditions of the gastrointestinal tract and allows drug absorption in the intestine. Hence, fucoidan-chitosan nanoparticles have been widely explored for oral delivery of active pharmaceutical ingredients [110,111,113,118,[123][124][125][126][127][128][129], also taking advantage of chitosan's property of increased contact with the mucus layer and consequently longer resistance times at the absorption site [129]. The biological properties of fucoidan described in Section 3.1.1 were explored by some authors to obtain synergic effects with a drug, for example, ciprofloxacin [117] or gemcitabine [126].…”
Section: Nanomedicine Applications Of Fucoidan-chitosan Nanoparticlesmentioning
confidence: 99%
“…Enterocytes constitute the major part of intestinal epithelial cells. The most commonly used in vitro model for intestinal cells is the human Caco-2 cell line (Gitrowski et al, 2014;He et al, 2013;Hubatsch et al, 2007;Lampen et al, 2004;Yu et al, 2013).…”
Section: Introductionmentioning
confidence: 99%