Academic Commons

Articles

Impact of prenatal polycyclic aromatic hydrocarbon exposure on behavior, cortical gene expression and DNA methylation of the Bdnf gene.

Miller, Rachel L.; Yan, Zhonghai; Maher, Christina; Zhang, Hanjie; Gudsnuk, Kathryn; McDonald, Jacob; Champagne, Frances Anne

Prenatal exposure to polycyclic aromatic hydrocarbons (PAH) has been associated with sustained effects on the brain and behavior in offspring. However, the mechanisms have yet to be determined. We hypothesized that prenatal exposure to ambient PAH in mice would be associated with impaired neurocognition, increased anxiety, altered cortical expression of Bdnf and Grin2b, and greater DNA methylation of Bdnf. Our results indicated that during open-field testing, prenatal PAH exposed offspring spent more time immobile and less time exploring. Females produced more fecal boli. Offspring prenatally exposed to PAH displayed modest reductions in overall exploration of objects. Further, prenatal PAH exposure was associated with lower cortical expression of Grin2b and Bdnf in males, and greater Bdnf IV promoter methylation. Epigenetic differences within the Bdnf IV promoter correlated with Bdnf gene expression, but not with the observed behavioral outcomes, suggesting that additional targets may account for these PAH-associated effects.

Files

Also Published In

Title
Neuroepigenetics
DOI
https://doi.org/10.1016/j.nepig.2016.02.001

More About This Work

Academic Units
Medicine
Pediatrics
Mailman School of Public Health
Psychology
Published Here
May 9, 2017