Remodelling of oxygen-transporting tracheoles drives intestinal regeneration and tumorigenesis in Drosophila.
Remodelling of oxygen-transporting tracheoles drives intestinal regeneration and tumorigenesis in Drosophila.
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DOI:
10.1038/s41556-021-00674-1
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发表时间:
2021-05
影响因子:
21.3
通讯作者:
Pitsouli C
中科院分区:
文献类型:
--
作者:
Tamamouna V;Rahman MM;Petersson M;Charalambous I;Kux K;Mainor H;Bolender V;Isbilir B;Edgar BA;Pitsouli C
The Drosophila trachea, as the functional equivalent of mammalian blood vessels, senses hypoxia and oxygenates the body. We show that the adult intestinal tracheae are dynamic and respond to enteric infection, oxidative agents, and tumors with increased terminal branching. Increased tracheation is necessary for efficient damage-induced intestinal stem cell (ISC)-mediated regeneration and sufficient to drive ISC proliferation in undamaged intestines. Gut damage or tumors induce Hif-1α/Sima, which stimulates tracheole branching via the FGF(Branchless/Bnl)/FGFR(Breathless/Btl) signalling cascade. Bnl/Btl signalling is required in the intestinal epithelium and the trachea for efficient damage-induced tracheal remodelling and ISC proliferation. Chemical or Pseudomonas-generated ROS affect the trachea directly and are necessary for branching and intestinal regeneration. Similarly, tracheole branching and the resulting increase in oxygenation are essential for intestinal tumor growth. We have identified a mechanism of tracheal-intestinal tissue communication, whereby damage and tumors induce neo-tracheogenesis in Drosophila, a process reminiscent of cancer-induced neoangiogenesis in mammals.
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