title: Preconception paternal stress in rats alters dendritic morphology and connectivity in the brain of developing male and female offspring.
abstract: The goal of this research was to examine the effect of preconception paternal stress (PPS) on the subsequent neurodevelopment and behavior of male and female offspring. Prenatal (gestational) stress has been shown to alter brain morphology in the developing brain, and is presumed to be a factor in the development of some adult psychopathologies. Our hypothesis was that paternal stress in the preconception period could impact brain development in the offspring, leading to behavioral abnormalities later in life. The purpose of this study was to examine the effect of preconception paternal stress on developing male and female offspring brain morphology in five brain areas; medial prefrontal cortex (mPFC), orbitofrontal cortex (OFC), parietal cortex (Par1), hippocampus (CA1) and nucleus accumbens (NAc). Alterations in dendritic measures and spine density were observed in each brain area examined in paternal stress offspring. Our two main findings reveal; (1) PPS alters brain morphology and organization and these effects are different than the effects of stress observed at other ages; and, (2) the observed dendritic changes were sexually dimorphic. This study provides direct evidence that PPS modifies brain architecture in developing offspring, including dendritic length, cell complexity, and spine density. Alterations observed may contribute to the later development of psychopathologies and maladaptive behaviors in the offspring.
authors.affiliation: Canadian Centre for Behavioural Neuroscience, University of Lethbridge, 4401 University Drive, Lethbridge, AB T1K 3M4, Canada. Electronic address: allonna.harker@uleth.ca.
authors.forename: A
authors.initials: A
authors.lastname: Harker
authors.affiliation: Canadian Centre for Behavioural Neuroscience, University of Lethbridge, 4401 University Drive, Lethbridge, AB T1K 3M4, Canada. Electronic address: sarah.raza@uleth.ca.
authors.forename: S
authors.initials: S
authors.lastname: Raza
authors.affiliation: Canadian Centre for Behavioural Neuroscience, University of Lethbridge, 4401 University Drive, Lethbridge, AB T1K 3M4, Canada. Electronic address: kayla.williamson2@uleth.ca.
authors.forename: K
authors.initials: K
authors.lastname: Williamson
authors.affiliation: Canadian Centre for Behavioural Neuroscience, University of Lethbridge, 4401 University Drive, Lethbridge, AB T1K 3M4, Canada; Canadian Institute for Advanced Research Program in Child Brain Development, 180 Dundas Street West, Toronto, ON M5G 1Z8, Canada. Electronic address: kolb@uleth.ca.
authors.forename: B
authors.initials: B
authors.lastname: Kolb
authors.affiliation: Canadian Centre for Behavioural Neuroscience, University of Lethbridge, 4401 University Drive, Lethbridge, AB T1K 3M4, Canada. Electronic address: gibb@uleth.ca.
authors.forename: R
authors.initials: R
authors.lastname: Gibb
mesh_terms: D000818:Animals; D001921:Brain / Q000254:growth & development* / Q000473:pathology*; D003712:Dendrites / Q000473:pathology*; D044127:Epigenesis, Genetic; D005260:Female; D008297:Male; D011247:Pregnancy; D051381:Rats; D020318:Rats, Long-Evans; D013315:Stress, Psychological / Q000473:pathology*
keywords: Golgi; development; hippocampus; nucleus accumbens; paternal; prefrontal