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Cleavage of cFLIP restrains cell death during viral infection and tissue injury and favors tissue repair
Cleavage of cFLIP restrains cell death during viral infection and tissue injury and favors tissue repair
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Length:
20 minutes
Released:
Dec 15, 2022
Format:
Podcast episode
Description
Link to bioRxiv paper:
http://biorxiv.org/cgi/content/short/2022.12.15.520548v1?rss=1
Authors: Martinez Lagunas, K., Savcigil, D. P., Zrilic, M., Carvajal Fraile, C., Craxton, A., Self, E., Uranga, I., de Miguel, D., Arias, M., Willenborg, S., Piekarek, M., Albert, M. C., Nugraha, K., Lisewski, I., Janakova, E., Igual, N., Tonnus, W., Hilendbrandt, X., Ibrahim, M., Ballegeer, M., Saelens, X., Kueh, A. J., Meier, P., Linkermann, A., Pardo, J., Eming, S., Walczak, H., MacFarlane, M., Peltzer, N., Annibaldi, A.
Abstract:
Cell death coordinates repair programs following pathogen attack and tissue injury. However, aberrant cell death can interfere with such programs and cause organ failure. cFLIP is a crucial regulator of cell death and a substrate of Caspase-8. Yet, the physiological role of cFLIP cleavage by Caspase-8 remains elusive. Here, we discovered an essential role for cFLIP cleavage in restraining cell death in different pathophysiological scenarios. Mice expressing a cleavage-resistant cFLIP mutant, CflipD377A, exhibited increased sensitivity to SARS-CoV-induced lethality, impaired skin wound healing and increased tissue damage caused by Sharpin deficiency. In vitro, abrogation of cFLIP cleavage sensitizes cells to TNF-induced necroptosis and apoptosis by favoring complex-II formation. Mechanistically, the cell death-sensitizing effect of the D377A mutation depends on Gln(Q)469. These results reveal a crucial role for cFLIP cleavage in controlling the amplitude of cell death responses occurring upon tissue stress, to ensure the execution of repair programs.
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http://biorxiv.org/cgi/content/short/2022.12.15.520548v1?rss=1
Authors: Martinez Lagunas, K., Savcigil, D. P., Zrilic, M., Carvajal Fraile, C., Craxton, A., Self, E., Uranga, I., de Miguel, D., Arias, M., Willenborg, S., Piekarek, M., Albert, M. C., Nugraha, K., Lisewski, I., Janakova, E., Igual, N., Tonnus, W., Hilendbrandt, X., Ibrahim, M., Ballegeer, M., Saelens, X., Kueh, A. J., Meier, P., Linkermann, A., Pardo, J., Eming, S., Walczak, H., MacFarlane, M., Peltzer, N., Annibaldi, A.
Abstract:
Cell death coordinates repair programs following pathogen attack and tissue injury. However, aberrant cell death can interfere with such programs and cause organ failure. cFLIP is a crucial regulator of cell death and a substrate of Caspase-8. Yet, the physiological role of cFLIP cleavage by Caspase-8 remains elusive. Here, we discovered an essential role for cFLIP cleavage in restraining cell death in different pathophysiological scenarios. Mice expressing a cleavage-resistant cFLIP mutant, CflipD377A, exhibited increased sensitivity to SARS-CoV-induced lethality, impaired skin wound healing and increased tissue damage caused by Sharpin deficiency. In vitro, abrogation of cFLIP cleavage sensitizes cells to TNF-induced necroptosis and apoptosis by favoring complex-II formation. Mechanistically, the cell death-sensitizing effect of the D377A mutation depends on Gln(Q)469. These results reveal a crucial role for cFLIP cleavage in controlling the amplitude of cell death responses occurring upon tissue stress, to ensure the execution of repair programs.
Copy rights belong to original authors. Visit the link for more info
Podcast created by Paper Player, LLC
Released:
Dec 15, 2022
Format:
Podcast episode
Titles in the series (100)
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