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ARMS-NF-κB signaling regulates intracellular ROS to induce autophagy-associated cell death upon oxidative stress.


ABSTRACT: Ankyrin repeat-rich membrane spanning (ARMS) plays roles in neural development, neuropathies, and tumor formation. Such pleiotropic function of ARMS is often attributed to diverse ARMS-interacting molecules in different cell context. However, it might be achieved by ARMS' effect on global biological mediator like reactive oxygen species (ROS). We established ARMS-knockdown in melanoma cells (siARMS) and in Drosophila eyes (GMR>dARMS RNAi ) and challenged them with H2O2. Decreased ARMS in both systems compromises nuclear translocation of NF-κB and induces ROS, which in turn augments autophagy flux and confers susceptibility to H2O2-triggered autophagic cell death. Resuming NF-κB activity or reducing ROS by antioxidants in siARMS cells and GMR>dARMS RNAi fly decreases intracellular peroxides level concurrent with reduced autophagy and attenuated cell death. Conversely, blocking NF-κB activity in wild-type flies/melanoma enhances ROS and induces autophagy with cell death. We thus uncover intracellular ROS modulated by ARMS-NFκB signaling primes autophagy for autophagic cell death upon oxidative stress.

SUBMITTER: Liao YH 

PROVIDER: S-EPMC9926119 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature

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ARMS-NF-κB signaling regulates intracellular ROS to induce autophagy-associated cell death upon oxidative stress.

Liao Yi-Hua YH   Wu June-Tai JT   Hsieh I-Chun IC   Lee Hsiu-Hsiang HH   Huang Pei-Hsin PH  

iScience 20230118 2


Ankyrin repeat-rich membrane spanning (ARMS) plays roles in neural development, neuropathies, and tumor formation. Such pleiotropic function of ARMS is often attributed to diverse ARMS-interacting molecules in different cell context. However, it might be achieved by ARMS' effect on global biological mediator like reactive oxygen species (ROS). We established <i>ARMS</i>-knockdown in melanoma cells (si<i>ARMS</i>) and in <i>Drosophila</i> eyes (<i>GMR>dARMS</i> <sup><i>RNAi</i></sup> ) and challe  ...[more]

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