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Obstetric Ultrasonography to Detect Fetal Abnormalities in a Mouse Model for Zika Virus Infection

机译:产科超声检查在寨卡病毒感染的小鼠模型中的胎儿异常。

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摘要

In 2015 Zika virus (ZIKV) emerged for the first time in South America. The following ZIKV epidemic resulted in the appearance of a clinical phenotype with microcephaly and other severe malformations in newborns. So far, mechanisms of ZIKV induced damage to the fetus are not completely understood. Previous data suggest that ZIKV may bypass the placenta to reach the fetus. Thus, animal models for ZIKV infection are important to facilitate studies about ZIKV infection during pregnancy. Here, we used ultrasound based imaging (USI) to characterize ZIKV induced pathogenesis in the pregnant Type I interferon receptor-deficient (IFNAR-/-) mouse model. Based on USI we suggest the placenta to be a primary target organ of ZIKV infection enabling ZIKV spreading to the fetus. Moreover, in addition to direct infection of the fetus, the placental ZIKV infection may cause an indirect damage to the fetus through reduced uteroplacental perfusion leading to intrauterine growth retardation (IUGR) and fetal complications as early as embryonic day (ED) 12.5. Our data confirmed the capability of USI to characterize ZIKV induced modifications in mouse fetuses. Data from further studies using USI to monitor ZIKV infections will contribute to a better understanding of ZIKV infection in pregnant IFNAR-/- mice.
机译:2015年,寨卡病毒(ZIKV)在南美首次出现。随后的ZIKV流行导致新生儿出现小头畸形和其他严重畸形的临床表型。到目前为止,还没有完全了解ZIKV引起胎儿损伤的机制。先前的数据表明ZIKV可能绕过胎盘到达胎儿。因此,ZIKV感染的动物模型对于促进妊娠期间ZIKV感染的研究很重要。在这里,我们使用了基于超声的成像(USI)来表征ZIKV诱导的孕妇I型干扰素受体缺陷型(IFNAR-/-)小鼠模型的发病机理。基于USI,我们建议胎盘是ZIKV感染的主要靶器官,可使ZIKV传播至胎儿。此外,除了直接感染胎儿外,胎盘ZIKV感染还可能通过减少子宫内胎盘灌注而对胎儿造成间接损害,导致子宫内发育迟缓(IUGR)和早在胚胎发育日(ED)12.5的胎儿并发症。我们的数据证实了USI表征ZIKV诱导的小鼠胎儿修饰的能力。使用USI监测ZIKV感染的进一步研究得出的数据将有助于更好地理解孕妇IFNAR-/-小鼠的ZIKV感染。

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