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Erschienen in: Magnetic Resonance Materials in Physics, Biology and Medicine 4/2020

10.12.2019 | Research Article

Stability evaluation of Gd chelates for macromolecular MRI contrast agents

verfasst von: Masayuki Yokoyama, Kouichi Shiraishi

Erschienen in: Magnetic Resonance Materials in Physics, Biology and Medicine | Ausgabe 4/2020

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Abstract

Objective

We try to establish designs for the macromolecular agents possessing high Gd3+-chelating stability, because free Gd3+ ion released from Gd chelates is known as a risk factor to cause toxic side effects and a safety concern.

Materials and methods

We prepared three types of Gd-based macromolecular MRI contrast agents from a synthetic polymer (poly(glutamic acid) homopolymer or poly(ethylene glycol)-b-poly(lysine) block copolymer) and a chelating moiety (DO3A or DOTA) having two strategic designs for high chelate stability. Then, we examine the in vitro Gd3+-chelate stability of these macromolecular MRI contrast agents.

Results

The prepared macromolecular agents exhibited the same or higher Gd3+-chelate stability as/than did Gd-DOTA that possesses the highest Gd3+-chelate stability among the approved small-MW Gd-chelate MRI contrast agent.

Discussion

Our macromolecular design was considered to work well for high Gd3+-chelate stability.
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Metadaten
Titel
Stability evaluation of Gd chelates for macromolecular MRI contrast agents
verfasst von
Masayuki Yokoyama
Kouichi Shiraishi
Publikationsdatum
10.12.2019
Verlag
Springer International Publishing
Erschienen in
Magnetic Resonance Materials in Physics, Biology and Medicine / Ausgabe 4/2020
Print ISSN: 0968-5243
Elektronische ISSN: 1352-8661
DOI
https://doi.org/10.1007/s10334-019-00805-8

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