Design and synthesis of a novel magnetic resonance imaging contrast agent for selective sensing of zinc ion

Kenjiro Hanaoka, Kazuya Kikuchi, Yasuteru Urano, Michiko Narazaki, Takashi Yokawa, Shigeru Sakamoto, Kentaro Yamaguchi, Tetsuo Nagano

Research output: Contribution to journalArticlepeer-review

95 Citations (Scopus)

Abstract

A series of new diethylenetriaminepentaacetic acid (DTPA)-bisamide chelators has been prepared and characterized for application as zinc sensors. We have designed and synthesized (GdLa)2-, which contains a DTPA-bisamide moiety. The R1 relaxivity of (GdLa)2- solution decreased monotonically on the addition of Zn2+. Moreover, (GdLa)2- showed high selectivity for Zn2+ against Ca2+ and Mg2+. We also measured the UV-visible spectra and the coldspray ionization (CSI) MS spectra and concluded that the 1-to-1 Zn2+ complex of (GdLa)2- is stable at higher concentrations of Zn2+. These complexes should provide the basis for creating a superior Zn2+-sensitive MRI contrast agent and are excellent candidates for incorporation into sensors designed for selective detection of Zn2+ in biological applications.

Original languageEnglish
Pages (from-to)1027-1032
Number of pages6
JournalChemistry and Biology
Volume9
Issue number9
DOIs
Publication statusPublished - 2002 Sep
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Medicine
  • Molecular Biology
  • Pharmacology
  • Drug Discovery
  • Clinical Biochemistry

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