Maternal stress suppresses cell proliferation in the forebrain of zebrafish larvae

Maternal stress suppresses cell proliferation in the forebrain of zebrafish larvae
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母体应激抑制斑马鱼幼虫前脑细胞增殖

DOI:
10.1111/gtc.12761
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发表时间:
2020
期刊:
影响因子:
2.1
通讯作者:
Higuchi Maiko
Higuchi Maiko
中科院分区:
生物学4区
文献类型:
--
作者:
Takabatake Shota;Fukumoto Yusei;Ohtsuka Satomi;Kanayama Naoki;Magari Masaki;Sakagami Hiroyuki;Hatano Naoya;Tokumitsu Hiroshi;Higuchi Maiko

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暴露于早期生活压力(ELS)会增加对各种精神疾病的易感性。尽管ELS已被证明可以改变成年哺乳动物大脑海马、杏仁核和前额叶皮层的结构和功能,但ELS是否也影响胚胎或早期大脑发育仍不清楚。在本研究中,我研究了母体应激(母体饥饿4天)对成年斑马鱼幼崽大脑发育的影响。虽然母体饥饿对中脑和后脑的增殖率没有很大影响,但在受精后5天(dpf),它显著降低了幼虫前脑的增殖率。我还发现,与对照组母亲所生的胚胎相比,饥饿母亲所生的胚胎在受精后10小时(hpf)的皮质醇水平升高。此外,皮质醇处理足以减少5只dpf幼虫前脑的增殖细胞。因此,我们的研究结果首次证明了母体饥饿诱导斑马鱼幼虫前脑的神经发育变化,并指出母体皮质醇在介导母体压力对后代的这种影响中的可能作用。
Exposure to early life stress (ELS) can increase vulnerability to various psychiatric disorders. Although ELS has been shown to alter structure and functions of the hippocampus, amygdala and prefrontal cortex in the adult mammalian brain, it remains largely unclear whether ELS also affects embryonic or early‐stage brain development. In this study, I investigated the effects of a maternal stress (maternal starvation for 4 days) of adult zebrafish on offspring's larval brain development. Although maternal starvation did not largely affect proliferation rate in the midbrain and hindbrain, it significantly decreased that in the forebrain of larvae at 5 days post‐fertilization (dpf). I also found that embryos at 10 hr post‐fertilization (hpf) born from a starved mother showed elevated cortisol levels compared to those born from a control mother. Furthermore, cortisol treatment was sufficient to decrease proliferating cells in the forebrain of 5 dpf larvae. Our findings thus demonstrate for the first time that maternal starvation induces neurodevelopmental changes in the forebrain of zebrafish larvae and points to a possible role of maternal cortisol in mediating this effect of maternal stress to offsprings.
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