Toxic heavy metal ion

Toxic heavy metal ions is not a specific, discrete molecule or receptor but rather a loosely defined group encompassing metal ions such as mercury (Hg²⁺), lead (Pb²⁺), cadmium (Cd²⁺), arsenic (primarily As³⁺/As⁵⁺), thallium (Tl⁺/Tl³⁺), and chromium (mainly Cr⁶⁺) that are highly toxic to various biological systems, including humans, at low concentrations[2][5][7]. These ions often lack essential biological function and exert toxicity through diverse mechanisms: generating reactive oxygen species, inactivating enzymes, and displacing vital metal ions in biomolecules, which can damage nucleic acids, proteins, and cellular membranes[2][3][5][7]. Toxic manifestations vary by metal and can include neurological, renal, developmental, immunological, and carcinogenic effects. Because "toxic heavy metal ions" is not a singular, pharmacologically tractable entity or standard molecular target (like a receptor or enzyme), but rather a collective hazard category, it is not considered a true therapeutic target. Instead, clinical interventions aim to chelate and remove these ions from exposed individuals, primarily using chelating agents[2][5][7]. This category designation is therefore too broad and non-specific for structured drug target annotation.

Other names

Heavy metal ionToxic heavy metalHeavy metal(loid)Heavy metal cation

Chelation and removal of metal ions from the body