Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Anoxia ameliorates the dexamethasone-induced neurobehavioral alterations in the neonatal male rat pups. / Menshanov, Petr N.; Bannova, Anita V.; Dygalo, Nikolay N.
в: Hormones and Behavior, Том 87, 01.01.2017, стр. 122-128.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Anoxia ameliorates the dexamethasone-induced neurobehavioral alterations in the neonatal male rat pups
AU - Menshanov, Petr N.
AU - Bannova, Anita V.
AU - Dygalo, Nikolay N.
N1 - Publisher Copyright: © 2016 Elsevier Inc.
PY - 2017/1/1
Y1 - 2017/1/1
N2 - Glucocorticoids and hypoxia are two essential factors affecting the brain development during labor and delivery. In addition to the neurobehavioral alterations induced separately by these factors, glucocorticoids can attenuate the deleterious consequences of severe hypoxia-ischemia on the brain development, acting as a neuroprotective agent in combination with hypoxia. The role of hypoxia in the combined action with corticosteroids is less clear. Severe hypoxia-ischemia results in the massive activation of caspase-3, masking any other effects of hypoxia on the neonatal brain exposed to glucocorticoids. As a result, the effects of mild hypoxia on the developing brain pretreated with glucocorticoids remain unclear. To analyze this problem, 2-day-old male rats were treated with dexamethasone (DEX) before the subsequent exposure to mild 10-min anoxia or normoxia. The treatment with only DEX resulted in the delay in the development of the negative geotaxis reaction and in the decrease in locomotor activity of the neonatal male pups. The mild anoxic event attenuated these DEX-induced neurobehavioral alterations. The treatment with DEX, but not the mild anoxic exposure alone, resulted in the delayed upregulation of active caspase-3 in the prefrontal cortex and in the brainstem of the male pups. This glucocorticoid-induced upregulation of active caspase-3 was prevented by the anoxic event. The present findings evidence that mild anoxia is capable of ameliorating the glucocorticoid-induced neurodevelopmental alterations in the neonatal rats if the artificial or the naturally occurring increase in the levels of glucocorticoids occurred just before the episode of hypoxia.
AB - Glucocorticoids and hypoxia are two essential factors affecting the brain development during labor and delivery. In addition to the neurobehavioral alterations induced separately by these factors, glucocorticoids can attenuate the deleterious consequences of severe hypoxia-ischemia on the brain development, acting as a neuroprotective agent in combination with hypoxia. The role of hypoxia in the combined action with corticosteroids is less clear. Severe hypoxia-ischemia results in the massive activation of caspase-3, masking any other effects of hypoxia on the neonatal brain exposed to glucocorticoids. As a result, the effects of mild hypoxia on the developing brain pretreated with glucocorticoids remain unclear. To analyze this problem, 2-day-old male rats were treated with dexamethasone (DEX) before the subsequent exposure to mild 10-min anoxia or normoxia. The treatment with only DEX resulted in the delay in the development of the negative geotaxis reaction and in the decrease in locomotor activity of the neonatal male pups. The mild anoxic event attenuated these DEX-induced neurobehavioral alterations. The treatment with DEX, but not the mild anoxic exposure alone, resulted in the delayed upregulation of active caspase-3 in the prefrontal cortex and in the brainstem of the male pups. This glucocorticoid-induced upregulation of active caspase-3 was prevented by the anoxic event. The present findings evidence that mild anoxia is capable of ameliorating the glucocorticoid-induced neurodevelopmental alterations in the neonatal rats if the artificial or the naturally occurring increase in the levels of glucocorticoids occurred just before the episode of hypoxia.
KW - Anoxia
KW - Brain
KW - Brainstem
KW - Caspase-3
KW - Cortex
KW - Development
KW - Dexamethasone
KW - Glucocorticoids
KW - Hypoxia
KW - Perinatal
KW - Animals, Newborn
KW - Up-Regulation/drug effects
KW - Neuroprotection
KW - Rats, Wistar
KW - Locomotion/drug effects
KW - Rats
KW - Male
KW - Glucocorticoids/adverse effects
KW - Brain/drug effects
KW - Prefrontal Cortex/drug effects
KW - Animals
KW - Behavior, Animal/drug effects
KW - Hypoxia/physiopathology
KW - Dexamethasone/adverse effects
KW - APOPTOSIS
KW - ENVIRONMENT
KW - HYPOXIA
KW - HIPPOCAMPUS
KW - ACTIVE CASPASE-3
KW - ISCHEMIC BRAIN-DAMAGE
KW - LABOR
KW - CEREBELLAR
KW - HYDROCORTISONE
KW - EXPRESSION
UR - http://www.scopus.com/inward/record.url?scp=84997079823&partnerID=8YFLogxK
U2 - 10.1016/j.yhbeh.2016.11.013
DO - 10.1016/j.yhbeh.2016.11.013
M3 - Article
C2 - 27865789
AN - SCOPUS:84997079823
VL - 87
SP - 122
EP - 128
JO - Hormones and Behavior
JF - Hormones and Behavior
SN - 0018-506X
ER -
ID: 8715675