JAK/STAT controls organ size and fate specification by regulating morphogen production and signalling.

JAK/STAT controls organ size and fate specification by regulating morphogen production and signalling.
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DOI:
10.1038/ncomms13815
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发表时间:
2017-01-03
影响因子:
16.6
通讯作者:
--
中科院分区:
综合性期刊1区
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--
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稳定的形态发生素产生细胞库对于任何器官或组织的发育都至关重要。在这里,我们提出证据表明,果蝇翅膀中的 JAK/STAT 信号传导促进了 Hedgehog 生成细胞的循环和存活,从而使附近的 BMP/Dpp 组织中心在发育中的翅膀附属物中稳定定位。我们确定凋亡抑制剂 dIAP1 和 Cyclin A 是受 JAK/STAT 调节的两个关键基因,有助于表达 Hedgehog 的细胞群的生长。我们还揭示了 JAK/STAT 在保证 Wingless 介导的附肢规范方面的早期作用,以及后来在限制附肢本身的 Dpp 组织活动方面的作用。这些结果揭示了保守的 JAK/STAT 通路通过调节形态发生素的产生和信号传导在肢体规范和生长中的基本作用,以及促生存线索和有丝分裂信号在发育器官中形态发生素产生细胞库的调节中的功能。形态发生素调节脊椎动物和无脊椎动物肢体的生长和模式。在这里,作者表明 JAK/STAT 途径促进果蝇翅膀中 Hedgehog 生成细胞群的生长,从而允许 BMP/Dpp 组织者的稳定定位。
A stable pool of morphogen-producing cells is critical for the development of any organ or tissue. Here we present evidence that JAK/STAT signalling in the Drosophila wing promotes the cycling and survival of Hedgehog-producing cells, thereby allowing the stable localization of the nearby BMP/Dpp-organizing centre in the developing wing appendage. We identify the inhibitor of apoptosis dIAP1 and Cyclin A as two critical genes regulated by JAK/STAT and contributing to the growth of the Hedgehog-expressing cell population. We also unravel an early role of JAK/STAT in guaranteeing Wingless-mediated appendage specification, and a later one in restricting the Dpp-organizing activity to the appendage itself. These results unveil a fundamental role of the conserved JAK/STAT pathway in limb specification and growth by regulating morphogen production and signalling, and a function of pro-survival cues and mitogenic signals in the regulation of the pool of morphogen-producing cells in a developing organ. Morphogens regulate growth and pattern in vertebrate and invertebrate limbs. Here, the authors show that the JAK/STAT pathway promotes the growth of the Hedgehog-producing cell population in the Drosophila wing, thereby allowing the stable localization of the BMP/Dpp organizer.
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