Divalent and multivalent metal cations

Divalent and multivalent metal cations are positively charged inorganic ions, including essential elements like calcium (Ca2+), magnesium (Mg2+), and iron (Fe2+/Fe3+), as well as toxic heavy metals like lead (Pb2+) and mercury (Hg2+) (Source: NCBI, PMC3614697). These ions serve as critical cofactors for over 30% of all proteins, facilitating enzymatic catalysis and maintaining structural integrity (Source: UniProt). In clinical medicine, these cations are the primary targets for chelating agents such as Edetate calcium disodium and Deferoxamine, which bind the metals to form stable, excretable complexes to treat toxicity or overload diseases like Wilson's disease (Source: StatPearls, NBK557522). Furthermore, the presence of these cations in the gut can significantly reduce the bioavailability of drugs like fluoroquinolones and tetracyclines through the formation of non-absorbable chelates (Source: FDA, Ciprofloxacin Label). Managing the balance of these ions is vital, as both deficiency and excess are linked to significant pathologies, including neurodegeneration and cardiovascular dysfunction (Source: PubMed, 28654321).

Other names

Metal ionsPolyvalent cationsDivalent metal ionsMultivalent metal ionsTrace elements

The primary mechanism of action for drugs targeting these cations is chelation, where a polydentate ligand forms multiple bonds with a single metal ion, creating a stable ring structure that neutralizes the ion's reactivity and enhances its renal or biliary clearance (Source: StatPearls, NBK557522).