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Multiple exposures of sevoflurane during pregnancy induces memory impairment in young female offspring mice
Woosuk Chung1,2, Seunghwan Yoon1, Yong Sup Shin1,2
1Department of Anesthesiology and Pain Medicine, Chungnam National University Hospital, Daejeon, Korea.
Background:
Earlier studies have reported conflicting results regarding long-term behavioral consequences after anesthesia during the fetal period. Previous studies also suggest several factors that may explain such conflicting data. Thus, we examined the influence of age and sex on long-term behavioral consequences after multiple sevoflurane exposures during the fetal period.
Methods:
C57BL/6J pregnant mice received oxygen with or without sevoflurane for 2 hours at gestational day (GD) 14-16. Offspring mice were subjected to behavioral assays for general activity (open field test), learning, and memory (fear chamber test) at postnatal day 30-35.
Results:
Multiple sevoflurane exposures at GD 14-16 caused significant changes during the fear chamber test in young female offspring mice. Such changes did not occur in young male offspring mice. However, general activity was not affected in both male and female mice.
Conclusions:
Multiple sevoflurane exposures in the second trimester of pregnancy affects learning and memory only in young female mice. Further studies focusing on diverse cognitive functions in an age-, sex-dependent manner may provide valuable insights regarding anesthesia-induced neurotoxicity.
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