Post-retrieval extinction in adolescence prevents return of juvenile fear.

Post-retrieval extinction in adolescence prevents return of juvenile fear.
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DOI:
10.1101/lm.043281.116
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发表时间:
2016-10
期刊:
Learning & memory (Cold Spring Harbor, N.Y.)
影响因子:
--
通讯作者:
Monfils MH
Monfils MH
中科院分区:
其他
文献类型:
--
作者:
Jones CE;Monfils MH

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生命早期的创伤经历可能导致情绪和焦虑障碍的发展,在青春期和青年期表现出来。在暴露于急性恐惧或压力下的幼鼠中,神经发育的改变会导致持久的行为异常。在这里,我们在大鼠的青春期后期(出生后第45天[p45])使用了一种改进的灭绝干预(检索+灭绝)来针对幼年时获得的听觉巴甫洛夫恐惧关联(p17和p25)。青少年干预的效果是通过评估成年人在恐惧重新获得和恐惧的社会传播期间的冻结来检验的。大鼠在发育过程中的三个时间点接受测试或训练:幼年(p17或p25),青春期(p45)和成年(p100)。青春期后期的恢复和消失阻碍了青少年时期最初获得的恐惧的社会恢复和恢复(分别为p17和p25)。青春期是这里测试的唯一一个时间点,在这个时间点上,检索+消失可以阻止对20天前获得的联想的恐惧回忆。
Traumatic experiences early in life can contribute to the development of mood and anxiety disorders that manifest during adolescence and young adulthood. In young rats exposed to acute fear or stress, alterations in neural development can lead to enduring behavioral abnormalities. Here, we used a modified extinction intervention (retrieval+extinction) during late adolescence (post-natal day 45 [p45]), in rats, to target auditory Pavlovian fear associations acquired as juveniles (p17 and p25). The effects of adolescent intervention were examined by assessing freezing as adults during both fear reacquisition and social transmission of fear from a cagemate. Rats underwent testing or training at three time points across development: juvenile (p17 or p25), adolescent (p45), and adult (p100). Retrieval+extinction during late adolescence prevented social reinstatement and recovery over time of fears initially acquired as juveniles (p17 and p25, respectively). Adolescence was the only time point tested here where retrieval+extinction prevented fear recall of associations acquired 20+ days earlier.
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