Linked Life Data

20799261

Source:http://linkedlifedata.com/resource/pubmed/id/20799261

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2010-9-2
pubmed:abstractText
Fluorescein- and terbium-labelled tuftsin (Thr-Lys-Pro-Arg) and pentapeptide (Thr-Lys-Pro-Pro-Arg) were synthesized and their properties were evaluated in vitro by luminescence spectrometry and confocal microscopy as fluorescence probes to target macrophage cells in biological systems. An increase in fluorescence of macrophages incubated with varying concentrations of fluorescein isothiocyanate or Tb-DOTA-tuftsin/pentapeptide conjugates was observed in a concentration-dependent manner. Tb-DOTA-pentapeptide had a greater affinity to macrophages than Tb-DOTA-tuftsin. Lipopolysaccharide (LPS) stimulation strengthened the internalization of peptide conjugates by macrophages through the tuftsin receptor mechanism. Tb-DOTA-tuftsin/pentapeptide conjugates are likely to be a promising optical reagents as probes of the immune response with involvement of macrophage cells in a variety of diseases. Gd-DOTA-tuftsin conjugate was also evaluated as a cell-specific contrast agent in in vitro MRI experiments. In this context, the macrophages labelled by Gd-DOTA-tuftsin were highly magnetic and detectable by MRI, which confirms that this vectorized MRI probe has the potential to image macrophage-mediated inflammation in diseases like brain traumas and stroke. Tuftsin receptor-specific biological-function domain may have a modified in vivo biodistribution profile, bioavailability and pharmacokinetics subsequent to its conjugation to a metal ion-binding backbone.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
1555-4317
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
5
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
223-30
pubmed:meshHeading
pubmed:articleTitle
Tuftsin derivatives of FITC, Tb-DOTA or Gd-DOTA as potential macrophage-specific imaging biomarkers.
pubmed:affiliation
State Key Laboratory of Magnetic Resonance and Molecular and Atomic Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, China. jianghua.feng@hotmail.com
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't