Effect Of Perinatal Perfluorinated Compounds (PFASs) Exposure On Behavior Of SD Rats

Perfluorinated compounds (PFASs) are persistent environmental pollutants recognized for their bioaccumulation and potential neurotoxic effects, particularly in relation to attention deficit hyperactivity disorder (ADHD). This study investigated the effects of perinatal PFAS exposure on Sprague-Dawley (SD) rats, with a focus on behavioral outcomes and dopamine metabolism in the prefrontal cortex (PFC). Pregnant rats were administered PFASs at concentrations of 1 mg/L, 3 mg/L, and 10 mg/L through drinking water during gestation and lactation, with a control group included for comparison. The offspring were subjected to behavioral assessments, including open field, marble burying, and jump tests, to evaluate locomotor activity, attention, and impulsivity. Neurochemical analyses were conducted to measure the expression of tyrosine hydroxylase (TH), aromatic L-amino acid decarboxylase (DDC), and dopamine receptor D1 (Drd1) in the PFC using Western blotting and quantitative PCR (qPCR). The results indicated that high-dose PFAS exposure (10 mg/L) resulted in hyperactivity, attention deficits, and impulsive behavior ( p < 0.05), along with decreased TH and DDC expression and altered Drd1 levels, suggesting disrupted dopamine metabolism. These findings imply that perinatal PFAS exposure leads to behavioral abnormalities and disruptions in dopamine-related processes.