gadolinium cation (3+)

Gadolinium cation (3+) is the trivalent form of the element gadolinium, represented as Gd3+. It is not used directly as a drug but serves as the active component in various gadolinium-based contrast agents (GBCAs) for magnetic resonance imaging (MRI). In these agents, Gd3+ is tightly chelated by organic ligands to reduce toxicity and facilitate safe intravenous administration. The primary mechanism of action involves shortening T1 relaxation times in MRI, thereby enhancing image contrast in tissues with abnormal vascularity or blood-brain barrier disruption. Free Gd3+ ions are highly toxic due to their interference with calcium-dependent biological processes; thus, they are always administered in chelated forms such as gadoteric acid or other macrocyclic/linear complexes[1][8]. The development and manufacturing of these agents involve companies specializing in rare earth elements and pharmaceutical-grade chemicals.

Other names

Gd3+gadolinium(III) ion