Non-apoptotic enteroblast-specific role of the initiator caspase Dronc for development and homeostasis of the Drosophila intestine.

Non-apoptotic enteroblast-specific role of the initiator caspase Dronc for development and homeostasis of the Drosophila intestine.
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DOI:
10.1038/s41598-021-81261-0
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发表时间:
2021-01-29
期刊:
影响因子:
4.6
通讯作者:
Bergmann A
Bergmann A
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Lindblad JL;Tare M;Amcheslavsky A;Shields A;Bergmann A

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caspase Dronc是果蝇中唯一含有caspase的CARD结构域,对细胞凋亡至关重要。在这里,我们报告说,纯合子dronc突变的成年动物是短命的,由于存在发育不良,有缺陷和泄漏的肠道。有趣的是,这种突变表型可以通过dronc突变动物中的肠母细胞特异性表达dronc+来显著拯救,这表明肠母细胞(肠道中的四种细胞类型之一)中特异性的适当Dronc功能对于肠道的正常发育至关重要。此外,成肠细胞特异性敲低dronc在成人肠道中触发增生和分化缺陷。Dronc的这些肠母细胞特异性功能不需要凋亡途径,因此以非凋亡方式发生。总之,我们证明了凋亡引发剂半胱天冬酶具有非常重要的非凋亡功能,用于正常发育和控制成人中肠的细胞谱系,因此用于适当的生理学和稳态。
The initiator caspase Dronc is the only CARD-domain containing caspase in Drosophila and is essential for apoptosis. Here, we report that homozygous dronc mutant adult animals are short-lived due to the presence of a poorly developed, defective and leaky intestine. Interestingly, this mutant phenotype can be significantly rescued by enteroblast-specific expression of dronc+ in dronc mutant animals, suggesting that proper Dronc function specifically in enteroblasts, one of four cell types in the intestine, is critical for normal development of the intestine. Furthermore, enteroblast-specific knockdown of dronc in adult intestines triggers hyperplasia and differentiation defects. These enteroblast-specific functions of Dronc do not require the apoptotic pathway and thus occur in a non-apoptotic manner. In summary, we demonstrate that an apoptotic initiator caspase has a very critical non-apoptotic function for normal development and for the control of the cell lineage in the adult midgut and therefore for proper physiology and homeostasis.
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