Divalent and other metal ions

Divalent and other metal ions, including essential elements like calcium, magnesium, iron, and zinc, as well as toxic heavy metals like lead and mercury, are fundamental components of biological systems (ChEMBL, Target CHEMBL2363066). These ions serve as indispensable cofactors for thousands of enzymes, provide structural integrity to proteins and bone, and act as key mediators in signaling pathways such as neurotransmission and muscle contraction (StatPearls, 2023). Pathologically, the accumulation of certain metals can lead to oxidative stress and organ damage, while deficiencies can cause systemic diseases such as anemia or osteoporosis (NIH, 2022). In clinical pharmacology, these ions are targeted primarily through chelation therapy, where drugs bind to the ions to form stable, non-toxic complexes that are subsequently excreted (Flora & Pachauri, 2010). This therapeutic approach is vital for treating conditions like iron overload, Wilson's disease, and acute heavy metal poisoning. Additionally, metal ions are administered as therapeutic agents to correct deficiencies or modulate physiological processes, highlighting their dual role as both essential nutrients and potential toxins (PubChem, 2024).

Other names

Metal ionsDivalent cationsMultivalent metal ionsTrace elementsHeavy metals

The primary mechanism of action for drugs targeting divalent and other metal ions is chelation, where the drug (ligand) forms multiple coordinate bonds with a single metal ion to create a stable, cyclic complex known as a chelate (Flora & Pachauri, 2010, PMID: 20714337). This process effectively sequesters the metal ion, preventing it from participating in toxic biochemical reactions or binding to cellular components. The resulting water-soluble complexes are then excreted from the body through the kidneys or the biliary system, thereby reducing the total body burden of the metal (StatPearls, 2023).