Platinum(II) ion (Pt(II))

Platinum ions (especially in the +2 oxidation state as platinum(II), Pt2+) are not biological targets or endogenous biomolecules; rather, they exist as metal cations or as parts of coordination complexes. Their primary medical relevance is as the central active moiety in platinum-based chemotherapeutic drugs such as cisplatin, carboplatin, and oxaliplatin. These drugs rely on the reactivity of platinum(II) ion complexes to form highly stable bonds with nucleophilic sites in DNA, leading to DNA cross-linking, disruption of cell division, and apoptosis, particularly in cancer cells. Platinum ions themselves do not serve as receptors, enzymes, or transporters, and are not considered conventional drug targets. Instead, it is their incorporation into specific chemical scaffolds (platinum complexes) that confers biological activity[3][4][5][8][10]. Additional notes: - "Platinum ions" is an imprecise and non-canonical term for a therapeutic target. The free ion is not targeted by drugs; rather, platinum complexes serve as the pharmacologically active species in chemotherapy. Therefore, "is_incorrect" is set to true[5][10]. - If specifically selecting a canonical molecular target, one should refer to the specific platinum-based complex (e.g., “cisplatin–DNA adduct”), not the isolated ion.

Other names

Platinum(2+)platinum(II) cationPt2+platinum dicationplatinum ion

Forms DNA cross-links, inhibits DNA replication and transcription, induces apoptosis when incorporated into drugs such as cisplatin