title: 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.
authors.affiliation: Department of Neurology, Xijing Hospital, Fourth Military Medical University, Xi׳an 710032, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Ma
authors.affiliation: Department of Neurology, Xijing Hospital, Fourth Military Medical University, Xi׳an 710032, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Yang
authors.affiliation: Department of Neurology, Xijing Hospital, Fourth Military Medical University, Xi׳an 710032, China; Department of Neurology, Shaanxi Provincial People׳s Hospital, Xi׳an 710068, China.
authors.forename: Rui
authors.initials: R
authors.lastname: Zhao
authors.affiliation: Department of Neurology, Xijing Hospital, Fourth Military Medical University, Xi׳an 710032, China.
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.affiliation: Department of Neurology, Xijing Hospital, Fourth Military Medical University, Xi׳an 710032, China.
authors.forename: Xiaogang
authors.initials: X
authors.lastname: Kang
authors.affiliation: Department of Histology and Embryology, Third Military Medical University, Chongqing 400038, China.
authors.forename: Lan
authors.initials: L
authors.lastname: Xiao
authors.affiliation: Department of Neurology, Xijing Hospital, Fourth Military Medical University, Xi׳an 710032, China. Electronic address: jiangwen@fmmu.edu.cn.
authors.forename: Wen
authors.initials: W
authors.lastname: Jiang
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D000927:Anticonvulsants / Q000494:pharmacology*; D002540:Cerebral Cortex / Q000187:drug effects / Q000254:growth & development / Q000473:pathology / Q000503:physiopathology; D003072:Cognition Disorders / Q000188:drug therapy* / Q000473:pathology / Q000503:physiopathology; D003337:Corpus Callosum / Q000187:drug effects / Q000254:growth & development / Q000473:pathology / Q000503:physiopathology; D004195:Disease Models, Animal; D054220:Malformations of Cortical Development / Q000188:drug therapy* / Q000473:pathology / Q000503:physiopathology; D018782:Maze Learning / Q000187:drug effects / Q000502:physiology; D009186:Myelin Sheath / Q000187:drug effects / Q000473:pathology / Q000502:physiology; D018697:Nootropic Agents / Q000494:pharmacology*; D010433:Pentylenetetrazole; D000069348:Quetiapine Fumarate / Q000494:pharmacology*; D017207:Rats, Sprague-Dawley; D021641:Recognition, Psychology / Q000187:drug effects / Q000502:physiology; D012640:Seizures / Q000188:drug therapy* / Q000473:pathology / Q000503:physiopathology; D012720:Severity of Illness Index; D065852:Spatial Memory / Q000187:drug effects / Q000502:physiology; D014965:X-Rays
chemical_list: D000927:Anticonvulsants; D018697:Nootropic Agents; D000069348:Quetiapine Fumarate; D010433:Pentylenetetrazole
keywords: Cognition; Epilepsy; Malformations of cortical development; Myelin; Quetiapine