Abstract
Catecholamines and their metabolites affect children's nervous system. Dopamine is an important neurotransmitter in the brain. In the routine analysis for diagnostics of diseases, the dopamine metabolite homovanillic acid (HVA) is determined. Mercury is a neurotoxic agent and can cause different undesirable effects on the brain. In the present work a putative correlation between HVA, the main metabolite of dopamine, and mercury in urine of healthy and autistic children was studied. The level of HVA was higher in the urine of autistic children (14.5 ± 8.3 mg L−1) compared to generally healthy children (4.4 ± 0.5 mg L−1). The level of mercury in the urine of autistic children was lower (0.36 ± 0.24 µg L−1) than in the urine of healthy children (2.1 ± 1.0 µg L−1) showing that there is no correlation between HVA and mercury.
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