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Effects of prenatal ethanol exposure on acoustic characteristics of ultrasonic vocalizations in rat pups
NeuroToxicology ( IF 3.4 ) Pub Date : 2018-08-29 , DOI: 10.1016/j.neuro.2018.08.006
Mohd. Ashik Shahrier , Hiromi Wada

Rat pups produce ultrasonic vocalizations (USVs) on isolation from their dam. Ultrasonic vocalization is a sensitive tool for evaluating social behavior between pups and their dam. Prenatal ethanol-exposure leads to a reduction in USVs and have the potential of inducing difficulties in social behavior between pups and their dam. However, effects of prenatal ethanol-exposure on the acoustic characteristics of USVs remain unclear. In this study, we recorded USVs produced by rat pups that were prenatally exposed to ethanol and examined their acoustic characteristics. Ethanol was administered to 13 pregnant rats in three stages by gradually increasing concentrations between gestational days (GDs) 8–20. From GDs 14–20, ethanol-containing tap water at concentrations of 30% and 15% (v/v) was administered to the high- and low-ethanol groups, respectively. Tap water without ethanol was given to the control group. On postnatal days (PNDs) 4, 8, 12, and 16, individual newly-born pups were isolated from their dam and littermates and USVs produced by them were recorded for 5 min. The number of USVs in the high-ethanol group was greater than that in both low-ethanol and control groups on PND 12. The mean, minimum, and maximum fundamental frequencies of USVs were elevated in the high-ethanol group compared with that in both low-ethanol and control groups. Higher amplitudes of USVs were produced by male pups in the high-ethanol group than in those in both low-ethanol and control groups on PND 12. These results suggest that prenatal ethanol exposure changed emotionality and accordingly, the high-ethanol group produced more USVs as distress calls.



中文翻译:

产前乙醇暴露对幼崽超声发声的声学特性的影响

老鼠幼崽与大坝隔离后会产生超声波发声(USV)。超声波发声是评估幼崽及其大坝之间社交行为的灵敏工具。产前乙醇暴露会导致USV减少,并有可能在幼崽及其大坝之间引发社会行为方面的困难。但是,产前乙醇暴露对USV声学特性的影响仍不清楚。在这项研究中,我们记录了大鼠幼崽在出生前暴露于乙醇中产生的USV,并检查了它们的声学特性。通过逐步增加孕期(GDs)8–20之间的浓度,将乙醇分三个阶段分给了13只怀孕的大鼠。从GDs 14–20,分别将高浓度和低浓度乙醇组的含乙醇自来水浓度分别为30%和15%(v / v)。将不含乙醇的自来水给予对照组。在出生后的第4、8、12和16天(PND),从其大坝和同窝仔中分离出各个新生的幼崽,并记录它们产生的USV 5分钟。在PND 12上,高乙醇组中USV的数量大于低乙醇组和对照组中的USV数量。高乙醇组中USV的平均,最小和最大基频均高于两个组低乙醇和对照组。在PND 12上,高乙醇组的雄性幼仔产生的USV幅度高于低乙醇组和对照组。这些结果表明,产前乙醇暴露改变了情绪,因此,高乙醇组产生了更多的USV作为遇险电话。在出生后第4、8、12和16天(PND),从其大坝和同窝仔中分离出各个新生的幼崽,并记录它们产生的USV 5分钟。在PND 12上,高乙醇组中USV的数量大于低乙醇组和对照组中的USV数量。高乙醇组中USV的平均,最小和最大基频均高于两个组低乙醇和对照组。在PND 12上,高乙醇组的雄性幼仔产生的USV幅度高于低乙醇组和对照组。这些结果表明,产前乙醇暴露改变了情绪,因此,高乙醇组产生了更多的USV作为遇险电话。在出生后第4、8、12和16天(PND),从其大坝和同窝仔中分离出各个新生的幼崽,并记录它们产生的USV 5分钟。在PND 12上,高乙醇组中USV的数量大于低乙醇组和对照组中的USV数量。高乙醇组中USV的平均,最小和最大基频均高于两个组低乙醇和对照组。在PND 12上,高乙醇组的雄性幼仔产生的USV幅度高于低乙醇组和对照组。这些结果表明,产前乙醇暴露改变了情绪,因此,高乙醇组产生了更多的USV作为遇险电话。从大坝和同窝幼仔中分离出每只新生的幼崽,并记录它们产生的USV 5分钟。在PND 12上,高乙醇组中USV的数量大于低乙醇组和对照组中的USV数量。高乙醇组中USV的平均,最小和最大基频均高于两个组低乙醇和对照组。在PND 12上,高乙醇组的雄性幼仔产生的USV幅度高于低乙醇组和对照组。这些结果表明,产前乙醇暴露改变了情绪,因此,高乙醇组产生了更多的USV作为遇险电话。从大坝和同窝幼仔中分离出每只新生的幼崽,并记录它们产生的USV 5分钟。在PND 12上,高乙醇组中USV的数量大于低乙醇组和对照组中的USV数量。高乙醇组中USV的平均,最小和最大基频均高于两个组低乙醇和对照组。在PND 12上,高乙醇组的雄性幼仔产生的USV幅度高于低乙醇组和对照组。这些结果表明,产前乙醇暴露改变了情绪,因此,高乙醇组产生了更多的USV作为遇险电话。与低乙醇组和对照组相比,高乙醇组中USV的平均,最小和最大基频均升高。在PND 12上,高乙醇组的雄性幼仔产生的USV幅度高于低乙醇组和对照组。这些结果表明,产前乙醇暴露改变了情绪,因此,高乙醇组产生了更多的USV作为遇险电话。与低乙醇组和对照组相比,高乙醇组中USV的平均,最小和最大基频均升高。在PND 12上,高乙醇组的雄性幼仔产生的USV幅度高于低乙醇组和对照组。这些结果表明,产前乙醇暴露改变了情绪,因此,高乙醇组产生了更多的USV作为遇险电话。

更新日期:2018-08-29
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