Ecdysone signaling at metamorphosis triggers apoptosis of Drosophila abdominal muscles.

Ecdysone signaling at metamorphosis triggers apoptosis of Drosophila abdominal muscles.
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DOI:
10.1016/j.ydbio.2013.08.029
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发表时间:
2013-11-15
影响因子:
2.7
通讯作者:
Perrimon, Norbert
Perrimon, Norbert
中科院分区:
生物学3区
文献类型:
--
作者:
Zirin, Jonathan;Cheng, Daojun;Dhanyasi, Nagaraju;Cho, Julio;Dura, Jean-Maurice;VijayRaghavan, Krishnaswamy;Perrimon, Norbert

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程序性细胞死亡的一个最戏剧性的例子发生在果蝇变态期间,当大多数幼虫组织在称为组织溶解的过程中被破坏时。我们对这一过程的理解大部分来自对唾液腺和中肠细胞死亡的分析。相比之下,对幼虫肌肉组织的退化知之甚少。在这里,我们分析程序性破坏的腹背外斜肌(DEOM)发生在第一个24小时的变态。我们发现,蜕皮激素信号通过蜕皮激素受体亚型B1是所需的细胞自主的肌肉死亡。此外,我们发现,孤儿核受体FTZ-F1,反对另一个核受体,HR 39,在DEOM组织溶解的时间起着至关重要的作用。最后,我们发现,与唾液腺和中肠的组织溶解不同,腹部肌肉的死亡是通过细胞凋亡发生的,不需要自噬。因此,在果蝇组织溶解过程中,自噬和凋亡的作用没有固定的规则。
One of the most dramatic examples of programmed cell death occurs during Drosophila metamorphosis, when most of the larval tissues are destroyed in a process termed histolysis. Much of our understanding of this process comes from analyses of salivary gland and midgut cell death. In contrast, relatively little is known about the degradation of the larval musculature. Here, we analyze the programmed destruction of the abdominal dorsal exterior oblique muscle (DEOM) which occurs during the first 24 hrs of metamorphosis. We find that ecdysone signaling through Ecdysone receptor isoform B1 is required cell autonomously for the muscle death. Furthermore, we show that the orphan nuclear receptor FTZ-F1, opposed by another nuclear receptor, HR39, plays a critical role in the timing of DEOM histolysis. Finally, we show that unlike the histolysis of salivary gland and midgut, abdominal muscle death occurs by apoptosis, and does not require autophagy. Thus, there is no set rule as to the role of autophagy and apoptosis during Drosophila histolysis.
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