The Hh pathway promotes cell apoptosis through Ci-Rdx-Diap1 axis

Apoptosis is a strictly coordinated process to eliminate superfluous or damaged cells, and its deregulation leads to birth defects and various human diseases. The regulatory mechanism underlying apoptosis still remains incompletely understood. To identify novel components in apoptosis, we carry out...

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Bibliographic Details
Published in:Cell death discovery 2021-09, Vol.7 (1), p.263-263, Article 263
Main Authors: Liu, Bin, Ding, Yan, Sun, Bing, Liu, Qingxin, Zhou, Zizhang, Zhan, Meixiao
Format: Article
Language:English
Subjects:
631/80/82/23
631/80/86
Apoptosis
Biochemistry
Biomedical and Life Sciences
Cell Biology
Cell Cycle Analysis
Congenital defects
Kinases
Life Sciences
Stem Cells
Transcription
Ubiquitin
Ubiquitin-protein ligase
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Summary:Apoptosis is a strictly coordinated process to eliminate superfluous or damaged cells, and its deregulation leads to birth defects and various human diseases. The regulatory mechanism underlying apoptosis still remains incompletely understood. To identify novel components in apoptosis, we carry out a modifier screen and find that the Hh pathway aggravates Hid-induced apoptosis. In addition, we reveal that the Hh pathway triggers apoptosis through its transcriptional target gene rdx , which encodes an E3 ubiquitin ligase. Rdx physically binds Diap1 to promote its K63-linked polyubiquitination, culminating in attenuating Diap1−Dronc interaction without affecting Diap1 stability. Taken together, our findings unexpectedly uncover the oncogenic Hh pathway is able to promote apoptosis through Ci-Rdx-Diap1 module, raising a concern to choose Hh pathway inhibitors as anti-tumor drugs.
ISSN:2058-7716
2058-7716
DOI:10.1038/s41420-021-00653-3