HealthMap

Cadmium Toxicity and Central Dopamine

• Mechanism of Action
• Cadmium (Cd) is a toxic heavy metal that significantly alters central nervous system function and neurotransmitter balance, particularly dopamine.
• It induces oxidative stress by depleting essential protective antioxidants like glutathione and increasing reactive oxygen species (ROS) in brain tissues.

• Impact on Dopamine Pathways
• Inhibition of Synthesis: Cadmium interferes with crucial enzymes involved in neurotransmitter production, leading to reduced levels of dopamine.
• Receptor and Transporter Alteration: Exposure modifies dopamine receptor sensitivity and dopamine transporter function, disrupting normal synaptic signaling.
• Enzymatic Interference: It competes with and displaces essential trace minerals (such as zinc, copper, and iron) that act as vital cofactors for neurological enzymes.

• Clinical and Physiological Consequences
• Disruption of the central dopaminergic system by cadmium can contribute to neurological dysfunction, behavioral changes, motor deficits, and cognitive impairment.
• Due to biological antagonism, nutritional optimization focusing on essential minerals and targeted antioxidant support is critical for mitigating heavy metal neurotoxicity.