To die or not to die--a role for Fork head.

To die or not to die--a role for Fork head.
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DOI:
10.1083/jcb.200702075
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发表时间:
2007-03-12
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Thummel CS
Thummel CS
中科院分区:
其他
文献类型:
--
作者:
Thummel CS

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精确确定细胞何时何地经历程序性细胞死亡对正常发育和组织内环境稳定是至关重要的。参见本期第页)报道,叉头(Fkh)转录因子对黑腹果蝇幼虫唾液腺的早期发育和功能至关重要,也有助于其死亡。这些作者表明,唾液腺中的fkh表达通常在蛹形成时丧失,这是在它们经历类固醇激素蜕皮激素引发的大量细胞死亡之前的12小时,为它们发育中的成年对应物腾出空间。Fkh的丧失消除了其在阻断细胞死亡中的作用,从而允许随后的蜕皮激素诱导的收割者和头部退化缺陷的死亡激活物表达和组织破坏。这项研究为程序性细胞死亡的转录调控以及发育过程中激素反应的精确空间和时间控制机制提供了新的见解。
The precise determination of when and where cells undergo programmed cell death is critical for normal development and tissue homeostasis.; see p. of this issue) report that the Fork head (Fkh) transcription factor, which is essential for the early development and function of the larval salivary glands in Drosophila melanogaster, also contributes to its demise. These authors show that fkh expression in the salivary glands is normally lost at puparium formation, which is ∼12 h before they undergo massive cell death triggered by the steroid hormone ecdysone, making room for their developing adult counterparts. The loss of Fkh eliminates its role in blocking cell death, allowing for subsequent ecdysone-induced reaper and head involution defective death activator expression and tissue destruction. This study provides new insights into the transcriptional regulation of programmed cell death and the mechanisms that underlie the precise spatial and temporal control of hormone responses during development.
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