Developmental loss of parvalbumin-positive cells in the prefrontal cortex and psychiatric anxiety after intermittent hypoxia exposures in neonatal rats might be mediated by NADPH oxidase-2

Behavioural Brain Research
Dong LiangMingqiang Zhang

Abstract

Sleep apnea is more frequently experienced in neonatal life. Here we investigated the causal contribution of NOX2-derived oxidative stress in the prefrontal cortex (PFC) to neurodevelopmental alterations and psychiatric anxiety in a neonatal rat model of sleep apnea. Neonatal postnatal day 5 (P5) rats were exposed to long-term intermittent hypoxia (LTIH) or room air (RA) for 10 days. In the PFC, we determined the impact (I) of LTIH exposures on NADPH oxidase-2 (NOX2) expression and oxidative stress (II) of pharmacological NOX2 inhibition on LTIH-induced neurodevelopmental alterations in the P14 and P49 rats. Endpoints were NOX2-derived oxidative stress, parvalbumin (PV)-positive cells (PV-cells) and psychiatric anxiety. The results showed neonatal LTIH exposures increased NOX2 expression in the PFC of P14 rats, which was accompanied with elevation of NOX activity. Neonatal LTIH exposures increased oxidative stress in cortical PV-cells characterized by elevation of 8-hydroxy-20-deoxyguanosine (8-OHDG) level and reduced PV immunoreactivity, PV-cell counts in the PFC of P14 and P49 rats. Neonatal LTIH exposures increased psychiatric anxiety levels in the P49 rats. Pretreatment of neonatal rats before each neonatal LTIH exposure wi...Continue Reading

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Citations

Mar 21, 2016·Pharmacological Research : the Official Journal of the Italian Pharmacological Society·Stefania Schiavone, Luigia Trabace
Feb 13, 2016·Chonnam Medical Journal·Ather Muneer
Oct 2, 2020·FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology·Luyan JiaoXian Lin
Feb 20, 2021·Experimental Neurology·Rebeca Hernández-SotoFernando Peña-Ortega

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