Linked Life Data

21042424

Source:http://linkedlifedata.com/resource/pubmed/id/21042424

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
2010-11-2
pubmed:abstractText
Single wall carbon nanotube (SWCNT) constructs were covalently appended with radiometal-ion chelates (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid [DOTA] or desferrioxamine B [DFO]) and the tumor neovascular-targeting antibody E4G10. The E4G10 antibody specifically targeted the monomeric vascular endothelial-cadherin (VE-cad) epitope expressed in the tumor angiogenic vessels. The construct specific activity and blood compartment clearance kinetics were significantly improved relative to corresponding antibodyalone constructs. We performed targeted radioimmunotherapy with a SWCNT-([(225)Ac]DOTA) (E4G10) construct directed at the tumor vasculature in a murine xenograft model of human colon adenocarcinoma (LS174T). The specific construct reduced tumor volume and improved median survival relative to controls. We also performed positron emission tomographic (PET) radioimmunoimaging of the tumor vessels with a SWCNT-([(89)Zr]DFO)(E4G10) construct in the same murine LS174T xenograft model and compared the results to appropriate controls. Dynamic and longitudinal PET imaging of LS174T tumor-bearing mice demonstrated rapid blood clearance (<1 hour) and specific tumor accumulation of the specific construct. Incorporation of the SWCNT scaffold into the construct design permitted us to amplify the specific activity to improve the signal-to-noise ratio without detrimentally impacting the immunoreactivity of the targeting antibody moiety. Furthermore, we were able to exploit the SWCNT pharmacokinetic (PK) profile to favorably alter the blood clearance and provide an advantage for rapid imaging. Near-infrared three-dimensional fluorescent-mediated tomography was used to image the LS174T tumor model, collect antibody-alone PK data, and calculate the number of copies of VE-cad epitope per cell. All of these studies were performed as a single administration of construct and were found to be safe and well tolerated by the murine model. These data have implications that support further imaging and radiotherapy studies using a SWCNT-based platform and focusing on the tumor vessels as the target.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
1178-2013
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
5
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
783-802
pubmed:meshHeading
pubmed-meshheading:21042424-Actinium, pubmed-meshheading:21042424-Adenocarcinoma, pubmed-meshheading:21042424-Animals, pubmed-meshheading:21042424-Cell Line, Tumor, pubmed-meshheading:21042424-Colonic Neoplasms, pubmed-meshheading:21042424-Deferoxamine, pubmed-meshheading:21042424-Heterocyclic Compounds, 1-Ring, pubmed-meshheading:21042424-Humans, pubmed-meshheading:21042424-Male, pubmed-meshheading:21042424-Mice, pubmed-meshheading:21042424-Mice, Nude, pubmed-meshheading:21042424-Nanomedicine, pubmed-meshheading:21042424-Nanotubes, Carbon, pubmed-meshheading:21042424-Neovascularization, Pathologic, pubmed-meshheading:21042424-Positron-Emission Tomography, pubmed-meshheading:21042424-Radioimmunodetection, pubmed-meshheading:21042424-Radioimmunotherapy, pubmed-meshheading:21042424-Radioisotopes, pubmed-meshheading:21042424-Radiopharmaceuticals, pubmed-meshheading:21042424-Xenograft Model Antitumor Assays, pubmed-meshheading:21042424-Zirconium
pubmed:year
2010
pubmed:articleTitle
Imaging and treating tumor vasculature with targeted radiolabeled carbon nanotubes.
pubmed:affiliation
Department of Medicine and Radiology, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't, Research Support, N.I.H., Extramural