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Assessing Adverse Effects of Aroclor 1254 on Perinatally Exposed Rat Offspring
Wei Tang1, Jin Ping Cheng1, Yi Chen Yang1
1School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Insights
Perinatal exposure to Aroclor 1254 (A1254) delayed neurobehavioral development in rat offspring and induced oxidative stress. This involved reduced antioxidant enzyme activity and increased nitric oxide levels in the brain.
Area of Science:
- Environmental Toxicology
- Neuroscience
- Biochemistry
Background:
- Polychlorinated biphenyls (PCBs), such as Aroclor 1254 (A1254), are persistent environmental pollutants.
- Perinatal exposure to toxicants can lead to long-term neurodevelopmental deficits.
- Understanding the redox responses to PCB exposure is crucial for assessing neurotoxicity.
Abstract:
To assess the neurotoxic effects and redox responses of Aroclor 1254 (A1254) on perinatally exposed rat offspring, A1254 was administered by gavage from gestational day (GD) 6 to postnatal day (PND) 21. Neurobehavioral development, antioxidant enzyme activities, lipid peroxidation (LPO), nitric oxide (NO), and NO synthase (NOS) levels were analyzed in the offspring. Neurobehavioral development analysis revealed delayed appearance of the righting reflex, negative geotaxis, and cliff drop test responses in A1254 exposed group. Developmental A1254 exposure also caused oxidative stress in the brain of PND 22 offspring via reductions in the activity of SOD and GSH-Px, and by promoting a rise in the levels of NO and NOS.
