RIPK1 protects hepatocytes from death in Fas-induced hepatitis

Abstract Hepatocyte death is a central event during liver disease progression, in which immune cells play key roles by activating members of the Tumor Necrosis Factor Receptor Superfamily (TNFRSF), including TNFR1 (TNFRSF1A), Fas (TNFRSF6) and TRAIL-R2 (TNFRSF10B). Receptor Interacting Protein Kinas...

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Autores principales:	Aveline Filliol, Muhammad Farooq, Claire Piquet-Pellorce, Valentine Genet, Marie-Thérèse Dimanche-Boitrel, Peter Vandenabeele, Mathieu J. M. Bertrand, Michel Samson, Jacques Le Seyec
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/5a69f5dded0846c29b4a7635d8cd5204
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spelling	oai:doaj.org-article:5a69f5dded0846c29b4a7635d8cd52042021-12-02T15:06:21ZRIPK1 protects hepatocytes from death in Fas-induced hepatitis10.1038/s41598-017-09789-82045-2322https://doaj.org/article/5a69f5dded0846c29b4a7635d8cd52042017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-09789-8https://doaj.org/toc/2045-2322Abstract Hepatocyte death is a central event during liver disease progression, in which immune cells play key roles by activating members of the Tumor Necrosis Factor Receptor Superfamily (TNFRSF), including TNFR1 (TNFRSF1A), Fas (TNFRSF6) and TRAIL-R2 (TNFRSF10B). Receptor Interacting Protein Kinase 1 (RIPK1) emerged as a signaling node downstream of these receptors. In the case of TNFR1, RIPK1 has been demonstrated to paradoxically serve as a scaffold to promote the survival of hepatocytes and as a kinase to kill them. To evaluate whether RIPK1 also protects hepatocytes from death in response to FasL or TRAIL, we took advantage of liver parenchymal cell-specific Ripk1 knockout mice (Ripk1 LPC-KO). We found that Ripk1 LPC-KO mice, as well as primary hepatocytes derived from them, were more susceptible to Fas-mediated apoptosis than their respective WT counterparts. Fas-induced hepatocyte death was independent of TNF-α signaling. Interestingly, while TRAIL administration did not induce hepatitis in Ripk1 LPC-KO mice or in their WT counterparts, its combination with IFN-γ only induced TNF-α dependent apoptosis in the Ripk1 LPC-KO mice. Together, our data demonstrate the protective role of RIPK1 downstream of Fas and highlight the general protective function of RIPK1 in hepatocytes exposed to inflammatory conditions, where TNF-α, FasL and/or TRAIL are present.Aveline FilliolMuhammad FarooqClaire Piquet-PellorceValentine GenetMarie-Thérèse Dimanche-BoitrelPeter VandenabeeleMathieu J. M. BertrandMichel SamsonJacques Le SeyecNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Aveline Filliol Muhammad Farooq Claire Piquet-Pellorce Valentine Genet Marie-Thérèse Dimanche-Boitrel Peter Vandenabeele Mathieu J. M. Bertrand Michel Samson Jacques Le Seyec RIPK1 protects hepatocytes from death in Fas-induced hepatitis
description	Abstract Hepatocyte death is a central event during liver disease progression, in which immune cells play key roles by activating members of the Tumor Necrosis Factor Receptor Superfamily (TNFRSF), including TNFR1 (TNFRSF1A), Fas (TNFRSF6) and TRAIL-R2 (TNFRSF10B). Receptor Interacting Protein Kinase 1 (RIPK1) emerged as a signaling node downstream of these receptors. In the case of TNFR1, RIPK1 has been demonstrated to paradoxically serve as a scaffold to promote the survival of hepatocytes and as a kinase to kill them. To evaluate whether RIPK1 also protects hepatocytes from death in response to FasL or TRAIL, we took advantage of liver parenchymal cell-specific Ripk1 knockout mice (Ripk1 LPC-KO). We found that Ripk1 LPC-KO mice, as well as primary hepatocytes derived from them, were more susceptible to Fas-mediated apoptosis than their respective WT counterparts. Fas-induced hepatocyte death was independent of TNF-α signaling. Interestingly, while TRAIL administration did not induce hepatitis in Ripk1 LPC-KO mice or in their WT counterparts, its combination with IFN-γ only induced TNF-α dependent apoptosis in the Ripk1 LPC-KO mice. Together, our data demonstrate the protective role of RIPK1 downstream of Fas and highlight the general protective function of RIPK1 in hepatocytes exposed to inflammatory conditions, where TNF-α, FasL and/or TRAIL are present.
format	article
author	Aveline Filliol Muhammad Farooq Claire Piquet-Pellorce Valentine Genet Marie-Thérèse Dimanche-Boitrel Peter Vandenabeele Mathieu J. M. Bertrand Michel Samson Jacques Le Seyec
author_facet	Aveline Filliol Muhammad Farooq Claire Piquet-Pellorce Valentine Genet Marie-Thérèse Dimanche-Boitrel Peter Vandenabeele Mathieu J. M. Bertrand Michel Samson Jacques Le Seyec
author_sort	Aveline Filliol
title	RIPK1 protects hepatocytes from death in Fas-induced hepatitis
title_short	RIPK1 protects hepatocytes from death in Fas-induced hepatitis
title_full	RIPK1 protects hepatocytes from death in Fas-induced hepatitis
title_fullStr	RIPK1 protects hepatocytes from death in Fas-induced hepatitis
title_full_unstemmed	RIPK1 protects hepatocytes from death in Fas-induced hepatitis
title_sort	ripk1 protects hepatocytes from death in fas-induced hepatitis
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/5a69f5dded0846c29b4a7635d8cd5204
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RIPK1 protects hepatocytes from death in Fas-induced hepatitis

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