Linked Life Data

8139451

Source:http://linkedlifedata.com/resource/pubmed/id/8139451

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1994-4-25
pubmed:abstractText
The Gd3+ complexes of three new phosphorus containing tetraaza macrocycles (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrakis (methylene ethylphosphonic acid), H4DOTEP; 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrakis (methylene phosphonic acid monoethylester), H4DOTPME; and the corresponding n-butyl ester, H4DOTPMB) were prepared and examined for possible use as MRI contrast agents. Although thermodynamically and kinetically less stable than Gd(DOTA)- in saline and HSA solution, the stability of these new macrocyclic complexes appears to be sufficiently high for in vivo applications. NMRD relaxivity profiles of the three complexes indicate that the number of inner sphere water molecules for these chelates is < or = 1 and that the more hydrophobic chelate, Gd(DOTPMB), binds to human serum albumin (HSA). Biodistribution studies of the radioactive 153Sm or 159Gd chelates in rats, gamma imaging of the 153Sm chelates in rats, and proton MRI studies of the nonradioactive Gd3+ chelates in rabbits all indicate that the DOTPMB complexes accumulate preferentially in the liver, spleen, and small intestines while the more hydrophilic DOTEP and DOTPME complexes appear to display renal clearances similar to other low molecular weight contrast agents.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0740-3194
pubmed:author
pubmed:issnType
Print
pubmed:volume
30
pubmed:owner
NLM
pubmed:authorsComplete
N
pubmed:pagination
696-703
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
Relaxometry, animal biodistribution, and magnetic resonance imaging studies of some new gadolinium (III) macrocyclic phosphinate and phosphonate monoester complexes.
pubmed:affiliation
Department of Biochemistry, University of Coimbra, Portugal.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't