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Quetiapine attenuates cognitive impairment and decreases seizure susceptibility possibly through promoting myelin development in a rat model of malformations of cortical development.

Abstract：

:Developmental delay, cognitive impairment, and refractory epilepsy are the most frequent consequences found in patients suffering from malformations of cortical development (MCD). However, therapeutic options for these psychiatric and neurological comorbidities are currently limited. The development of white matter undergoes dramatic changes during postnatal brain maturation, thus myelination deficits resulting from MCD contribute to its comorbid diseases. Consequently, drugs specifically targeting white matter are a promising therapeutic option for the treatment of MCD. We have used an in utero irradiation rat model of MCD to investigate the effects of postnatal quetiapine treatment on brain myelination as well as neuropsychological and cognitive performances and seizure susceptibility. Fatally irradiated rats were treated with quetiapine (10mg/kg, i.p.) or saline once daily from postnatal day 0 (P0) to P30. We found that postnatal administration of quetiapine attenuated object recognition memory impairment and improved long-term spatial memory in the irradiated rats. Quetiapine treatment also reduced the susceptibility and severity of pentylenetetrazol-induced seizures. Importantly, quetiapine treatment resulted in an inhibition of irradiation-induced myelin breakdown in the cerebral cortex and corpus callosum. These findings suggest that quetiapine may have beneficial, postnatal effects in the irradiated rats, strongly suggesting that improving MCD-derived white matter pathology is a possible underlying mechanism. Collectively, these results indicate that brain myelination represents an encouraging pharmacological target to improve the prognosis of patients with MCD.

journal_name

Brain Res

journal_title

Brain research

authors

Ma L,Yang F,Zhao R,Li L,Kang X,Xiao L,Jiang W

doi

10.1016/j.brainres.2015.07.012

subject

Has Abstract

pub_date

2015-10-05 00:00:00

pages

443-51

eissn

0006-8993

issn

1872-6240

pii

S0006-8993(15)00538-7

journal_volume

1622

pub_type

杂志文章

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