Effects of prenatal exposure to chronic mild stress and toluene in rats
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Effects of prenatal exposure to chronic mild stress and toluene in rats. / Hougaard, Karin S; Andersen, Maibritt B; Hansen, Åse Marie; Hass, Ulla; Werge, Thomas; Lund, Søren P.
In: Neurotoxicology and Teratology, Vol. 27, No. 1, 01.02.2005, p. 153-67.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Effects of prenatal exposure to chronic mild stress and toluene in rats
AU - Hougaard, Karin S
AU - Andersen, Maibritt B
AU - Hansen, Åse Marie
AU - Hass, Ulla
AU - Werge, Thomas
AU - Lund, Søren P
PY - 2005/2/1
Y1 - 2005/2/1
N2 - The aim of the present study was to elucidate whether prenatal chronic stress, in combination with exposure to a developmental neurotoxicant, would increase effects in the offspring compared with the effects of either exposure alone. Development and neurobehavioral effects were investigated in female offspring of pregnant rats (Mol:WIST) exposed to chronic mild stress (CMS) during gestational days (GD) 9-20, or 1500 ppm toluene, 6 h/day during gestational days 7-20, or a combination of the two. Prenatal CMS was associated with decreased thymic weight and increased auditory startle response. The corticosterone response to restraint seemed modified by prenatal exposure to toluene. Lactational body weight was decreased in offsprings subjected to CMS, primarily due to effects in the combined exposure group. Cognitive function was investigated in the Morris water maze, and some indications of improved function due to CMS were observed. In the present experimental setting, there was no indication of the two exposures potentiating each other with respect to adverse effects on the nervous system. However, the effects of prenatal CMS indicate that stress during fetal life may interfere with the development of the thymus and increase the reactivity (startle reflex) of the offspring.
AB - The aim of the present study was to elucidate whether prenatal chronic stress, in combination with exposure to a developmental neurotoxicant, would increase effects in the offspring compared with the effects of either exposure alone. Development and neurobehavioral effects were investigated in female offspring of pregnant rats (Mol:WIST) exposed to chronic mild stress (CMS) during gestational days (GD) 9-20, or 1500 ppm toluene, 6 h/day during gestational days 7-20, or a combination of the two. Prenatal CMS was associated with decreased thymic weight and increased auditory startle response. The corticosterone response to restraint seemed modified by prenatal exposure to toluene. Lactational body weight was decreased in offsprings subjected to CMS, primarily due to effects in the combined exposure group. Cognitive function was investigated in the Morris water maze, and some indications of improved function due to CMS were observed. In the present experimental setting, there was no indication of the two exposures potentiating each other with respect to adverse effects on the nervous system. However, the effects of prenatal CMS indicate that stress during fetal life may interfere with the development of the thymus and increase the reactivity (startle reflex) of the offspring.
KW - Animals
KW - Apomorphine
KW - Behavior, Animal
KW - Body Weight
KW - Cognition
KW - Corticosterone
KW - Dopamine Agonists
KW - Dose-Response Relationship, Drug
KW - Drug Administration Schedule
KW - Drug Interactions
KW - Exploratory Behavior
KW - Female
KW - Gestational Age
KW - Lactation
KW - Male
KW - Maze Learning
KW - Neural Inhibition
KW - Organ Size
KW - Pregnancy
KW - Prenatal Exposure Delayed Effects
KW - Rats
KW - Reflex, Acoustic
KW - Solvents
KW - Stress, Psychological
KW - Toluene
KW - Comparative Study
KW - Journal Article
KW - Research Support, Non-U.S. Gov't
U2 - 10.1016/j.ntt.2004.08.001
DO - 10.1016/j.ntt.2004.08.001
M3 - Journal article
C2 - 15681129
VL - 27
SP - 153
EP - 167
JO - Neurotoxicology and Teratology
JF - Neurotoxicology and Teratology
SN - 0892-0362
IS - 1
ER -
ID: 173709828