Heat shock and thermotolerance during early rat embryo development.

Heat shock and thermotolerance during early rat embryo development.
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早期大鼠胚胎发育过程中的热休克和耐热性。

DOI:
10.1002/tera.1420360205
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发表时间:
1987
期刊:
Teratology
影响因子:
--
通讯作者:
Edwards,MJ
Edwards,MJ
中科院分区:
--
文献类型:
--
作者:
Walsh,DA;Klein,NW;Hightower,LE;Edwards,MJ

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使用培养的大鼠胚胎研究了热休克对早期前体节胚胎发育的影响。这些结果说明了发育中的头部和大脑在神经管关闭之前对高温的敏感性以及胚胎获得耐热性的能力。短暂暴露于高温(43°C持续7.5分钟)的胚胎会出现严重的颅面缺陷,包括小眼症、小头畸形、前脑区域严重缩小和神经管开放。相比之下,非致畸性热休克(42°C持续10分钟)导致胚胎在38.5°C的15分钟恢复期内获得耐热性。获得的耐热性是有效的,在保护胚胎从随后的更严重的热处理,这将是致畸性在一个未受保护的胚胎。恢复胚胎安装热休克反应所证明的71千道尔顿热休克蛋白的诱导。热休克反应的激活不是发育中胚胎的致畸事件。
Effects of heat shock on the development of early pre‐somite embryos have been studied using cultured rat embryos. The results illustrate the sensitivity of the developing head and brain to elevated temperatures prior to neural tube closure and the capacity of embryos to acquire thermotolerance. Embryos exposed briefly to an elevated temperature (43°C for 7.5 min) developed severe craniofacial defects including microphthalmia, microcephaly, gross reduction of the forebrain region, and open neural tubes. In contrast, a nonteratogenic heat shock (42°C for 10 min) caused embryos to acquire thermotolerance during a 15‐min recovery period at 38.5°C. Acquired thermotolerance was effective in protecting embryos from a subsequent more severe heat treatment which would have been teratogenic in an unprotected embryo. Recovering embryos mounted a heat shock response as evidenced by the induction of a 71 kilodalton heat shock protein. Activation of the heat shock response was not a teratogenic event in the developing embryo.
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