title: Maternal exercise during pregnancy ameliorates the postnatal neuronal impairments induced by prenatal restraint stress in mice.
abstract: Clinical and preclinical studies have demonstrated that prenatal stress (PS) induces neuronal and behavioral disturbances in the offspring. In the present study, we determined whether maternal voluntary wheel running (VWR) during pregnancy could reverse the putative deleterious effects of PS on the neurodevelopment and behavior of the offspring. Pregnant CF-1 mice were randomly assigned to control, restraint stressed or restraint stressed+VWR groups. Dams of the stressed group were subjected to restraint stress between gestational days 14 and delivery, while control pregnant dams remained undisturbed in their home cages. Dams of the restraint stressed+VWR group were subjected to exercise between gestational days 1 and 17. On postnatal day 23 (P23), male pups were assigned to one of the following experimental groups: mice born from control dams, stressed dams or stressed+VWR dams. Locomotor behavior and pyramidal neuronal morphology were evaluated at P23. Animals were then sacrificed, and Golgi-impregnated pyramidal neurons of the parietal cortex were morphometrically analyzed. Here, we present two major findings: first, PS produced significantly diminished dendritic growth of parietal neurons without altered locomotor behavior of the offspring; and second, maternal VWR significantly offset morphological impairments.
authors: Laboratorio de Neurociencias, Escuela de Kinesiología, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Chile. carlos.bustamante@ucv.cl
authors: Carlos
authors: C
authors: Bustamante
authors: Ricardo
authors: R
authors: Henríquez
authors: Felipe
authors: F
authors: Medina
authors: Carmen
authors: C
authors: Reinoso
authors: Ronald
authors: R
authors: Vargas
authors: Rodrigo
authors: R
authors: Pascual
mesh_terms: D000818:Animals; D001522:Behavior, Animal; D005260:Female; D008297:Male; D051379:Mice; D010805:Physical Conditioning, Animal / Q000379:methods*; D011247:Pregnancy; D011297:Prenatal Exposure Delayed Effects / Q000473:pathology / Q000503:physiopathology* / Q000517:prevention & control*; D017966:Pyramidal Cells / Q000473:pathology*; D012149:Restraint, Physical; D013315:Stress, Psychological / Q000473:pathology / Q000503:physiopathology* / Q000517:prevention & control*