title: Stereochemical influence on the stability of radio-metal complexes in vivo. Synthesis and evaluation of the four stereoisomers of 2-(p-nitrobenzyl)-trans-CyDTPA.
abstract: Distinct differences in in vivo stability of the two diastereomeric C-Functionalized CyDTPA chelating agents, (CHX-A DTPA and CHX-B DTPA, both racemates), as recently reported prompted further investigation as to why differences in configuration produced striking effects on the in vivo stability of their yttrium complexes. To this end, the four individual component stereoisomers of CHX-A and CHX-B were synthesized and ability to bind yttrium was investigated both in vitro and in vivo.
authors.affiliation: Section, Radiation Oncology Branch, NCI, NIH, Bethesda, MD 20892-1002, USA.
authors.forename: C
authors.initials: C
authors.lastname: Wu
authors.forename: H
authors.initials: H
authors.lastname: Kobayashi
authors.forename: B
authors.initials: B
authors.lastname: Sun
authors.forename: T M
authors.initials: TM
authors.lastname: Yoo
authors.forename: C H
authors.initials: CH
authors.lastname: Paik
authors.forename: O A
authors.initials: OA
authors.lastname: Gansow
authors.forename: J A
authors.initials: JA
authors.lastname: Carrasquillo
authors.forename: I
authors.initials: I
authors.lastname: Pastan
authors.forename: M W
authors.initials: MW
authors.lastname: Brechbiel
mesh_terms: D000818:Animals; D002614:Chelating Agents / Q000138:chemical synthesis / Q000737:chemistry* / Q000493:pharmacokinetics; D004355:Drug Stability; D006801:Humans; D017879:Isothiocyanates / Q000138:chemical synthesis* / Q000737:chemistry*; D008024:Ligands; D051379:Mice; D004369:Pentetic Acid / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry*; D013237:Stereoisomerism; D013329:Structure-Activity Relationship; D014018:Tissue Distribution; D015019:Yttrium / Q000737:chemistry
chemical_list: D002614:Chelating Agents; D017879:Isothiocyanates; D008024:Ligands; C085678:N-(2-amino-3-(4-isothiocyanatophenyl)propyl)cyclohexane-1,2-diamine-N,N',N',N'',N''-pentaacetic acid; D015019:Yttrium; D004369:Pentetic Acid