Manganese (Mn)
Also known as: Mn2+ · Methylcyclopentadienyl manganese tricarbonyl · MMT
Overview
An essential trace element that becomes neurotoxic at elevated exposures. Manganese preferentially accumulates in the basal ganglia of the brain, producing a Parkinson's-like syndrome called manganism. It is also a component of the gasoline additive MMT. PBMC accumulation of manganese reflects systemic overexposure and is a sensitive early indicator before neurological symptoms appear. Occupational and environmental manganese exposure is significantly underdiagnosed.
Primary Sources
Welding fumes (the leading occupational source), contaminated well water, gasoline additive MMT, industrial emissions from steel and alloy production, dietary excess from supplements, parenteral nutrition.
Health Effects
Manganism (Parkinson's-like syndrome with tremor, rigidity, and cognitive impairment), basal ganglia neurodegeneration, psychiatric symptoms, immune dysregulation, and reproductive toxicity at high exposures.
Detection Method
This toxin is detected and quantified using HRMS + ICP-MS analysis of isolated PBMCs. The intracellular accumulation of this compound in lymphocytes and monocytes provides a more accurate reflection of chronic systemic burden than conventional serum or urine testing.