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https://www.readbyqxmd.com/read/28092460/a-three-dimensional-lymphatic-endothelial-cell-tube-formation-assay-to-identify-novel-kinases-involved-in-lymphatic-vessel-remodeling
#1
T Jessica Gambino, Steven P Williams, Carol Caesar, Daniel Resnick, Cameron J Nowell, Rae H Farnsworth, Marc G Achen, Steven A Stacker, Tara Karnezis
The lymphatic system is a series of vessels that transport cells and excess fluid from tissues to the blood vascular system. Normally quiescent, the lymphatics can grow or remodel in response to developmental, immunological, or cells pathological stimuli. Lymphatic vessels comprise lymphatic endothelial cells (LECs) that can respond to external growth factors by undergoing proliferation, migration, adhesion, and tube and lumen formation into new vessel structures, a process known as lymphangiogenesis. To understand the key gene and signaling pathways necessary for lymphangiogenesis and lymphatic vessel remodeling, we have developed a three-dimensional LEC tube formation assay to explore the role of kinase signaling in these processes...
January 2017: Assay and Drug Development Technologies
https://www.readbyqxmd.com/read/28088582/ripk1-protects-hepatocytes-from-kupffer-cells-mediated-tnf-induced-apoptosis-in-mouse-models-of-pamp-induced-hepatitis
#2
Aveline Filliol, Claire Piquet-Pellorce, Céline Raguénès-Nicol, Sarah Dion, Muhammad Farooq, Catherine Lucas-Clerc, Peter Vandenabeele, Mathieu J M Bertrand, Jacques Le Seyec, Michel Samson
BACKGROUND & AIMS: The severity of liver diseases is exacerbated by the death of hepatocytes, which can be induced by the sensing of Pathogen Associated Molecular Patterns (PAMPs) derived from the gut microbiota. The molecular mechanisms regulating these cell death pathways are poorly documented. In this study, we investigated the role of the Receptor Interacting Protein Kinase 1 (RIPK1), a protein known to regulate cell fate decisions, in the death of hepatocytes using two in vivo models of PAMP-induced hepatitis...
January 11, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28087739/tnf-signaling-through-rip1-kinase-enhances-sn38-induced-death-in-colon-adenocarcinoma
#3
Lucia Cabal-Hierro, Peter J O'Dwyer
: Elucidation of tumor necrosis factor (TNF)-directed mechanisms for cell death induction and maintenance of tumor growth has revealed a role for receptor-interacting protein kinases 1 and 3 (RIPK1/RIP1 and RIPK3/RIP3), components of the necrosome complex, as determinants of cell fate. Here the participation of TNF signaling was analyzed with regard to the cytotoxic action of different DNA damaging agents in a panel of colon cancer cells. While most of these cell lines were insensitive to TNF, combination with these drugs increased sensitivity by inducing cell death and DNA damage, especially in the case of the topoisomerase inhibitor SN38...
January 13, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28069809/the-receptor-interacting-serine-threonine-protein-kinase-1-ripk1-regulates-progranulin-levels
#4
Amanda R Mason, Lisa P Elia, Steven Finkbeiner
Progranulin (PGRN), a secreted growth factor, is a key regulator of inflammation and is genetically linked to two common and devastating neurodegenerative diseases. Haploinsufficiency mutations in GRN, the gene encoding PGRN, cause frontotemporal dementia (FTD) and a GRN SNP confers significantly increased risk for Alzheimer's disease (AD). Because cellular and animal data indicate that increasing PGRN can reverse phenotypes of both FTD and AD, modulating PGRN level has been proposed as a therapeutic strategy for both diseases...
January 9, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28017612/ripk1-suppresses-a-traf2-dependent-pathway-to-liver-cancer
#5
Anne T Schneider, Jérémie Gautheron, Maria Feoktistova, Christoph Roderburg, Sven H Loosen, Sanchari Roy, Fabian Benz, Peter Schemmer, Markus W Büchler, Ueli Nachbur, Ulf P Neumann, Rene Tolba, Mark Luedde, Jessica Zucman-Rossi, Diana Panayotova-Dimitrova, Martin Leverkus, Christian Preisinger, Frank Tacke, Christian Trautwein, Thomas Longerich, Mihael Vucur, Tom Luedde
Receptor-interacting protein kinase 1 (RIPK1) represents an essential signaling node in cell death and inflammation. Ablation of Ripk1 in liver parenchymal cells (LPC) did not cause a spontaneous phenotype, but led to tumor necrosis factor (TNF)-dependent hepatocyte apoptosis and liver injury without affecting inducible nuclear factor κB (NF-κB) activation. Loss of Ripk1 induced the TNF-dependent proteasomal degradation of the E3-ligase, TNF receptor-associated factor 2 (TRAF2), in a kinase-independent manner, thereby activating caspase-8...
January 9, 2017: Cancer Cell
https://www.readbyqxmd.com/read/28004776/a20-curtails-primary-but-augments-secondary-cd8-t-cell-responses-in-intracellular-bacterial-infection
#6
Sissy Just, Gopala Nishanth, Jörn H Buchbinder, Xu Wang, Michael Naumann, Inna Lavrik, Dirk Schlüter
The ubiquitin-modifying enzyme A20, an important negative feedback regulator of NF-κB, impairs the expansion of tumor-specific CD8(+) T cells but augments the proliferation of autoimmune CD4(+) T cells. To study the T cell-specific function of A20 in bacterial infection, we infected T cell-specific A20 knockout (CD4-Cre A20(fl/fl)) and control mice with Listeria monocytogenes. A20-deficient pathogen-specific CD8(+) T cells expanded stronger resulting in improved pathogen control at day 7 p.i. Imaging flow cytometry revealed that A20-deficient Listeria-specific CD8(+) T cells underwent increased apoptosis and necroptosis resulting in reduced numbers of memory CD8(+) T cells...
December 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27999438/necroptosis-in-development-inflammation-and-disease
#7
Ricardo Weinlich, Andrew Oberst, Helen M Beere, Douglas R Green
In the early 2000s, receptor-interacting serine/threonine protein kinase 1 (RIPK1), a molecule already recognized as an important regulator of cell survival, inflammation and disease, was attributed an additional function: the regulation of a novel cell death pathway that came to be known as necroptosis. Subsequently, the related kinase RIPK3 and its substrate mixed-lineage kinase domain-like protein (MLKL) were also implicated in the necroptotic pathway, and links between this pathway and apoptosis were established...
December 21, 2016: Nature Reviews. Molecular Cell Biology
https://www.readbyqxmd.com/read/27980222/ripk1-prevents-aberrant-zbp1-initiated-necroptosis
#8
EDITORIAL
Tom Vanden Berghe, William J Kaiser
No abstract text is available yet for this article.
December 12, 2016: Oncotarget
https://www.readbyqxmd.com/read/27929749/critical-role-of-x-box-binding-protein-1-in-nadph-oxidase-4-triggered-cardiac-hypertrophy-is-mediated-by-receptor-interacting-protein-kinase-1
#9
Li Chen, Mingyue Zhao, Junli Li, Yu Wang, Qinxue Bao, Siyuan Wu, Xueqin Deng, Xiaoju Tang, Wenchao Wu, Xiaojing Liu
NADPH oxidase 4 (NOX4) and the NOX4-related redox signaling are implicated in cardiac hypertrophy. NOX4 is interrelated with endoplasmic reticulum stress (ERS). Spliced X-box binding protein 1 (Xbp1s) is a key mediator of ERS while its role in cardiac hypertrophy is still poorly understood. Recently, receptor interacting protein kinase 1(RIPK1) has been increasingly reported to be associated with ERS. Therefore, we aimed to test the hypothesis that Xbp1s mediates NOX4-triggered cardiac hypertrophy via RIPK1 signaling...
December 8, 2016: Cell Cycle
https://www.readbyqxmd.com/read/27924226/questions-and-controversies-the-role-of-necroptosis-in-liver-disease
#10
REVIEW
Lily Dara, Zhang-Xu Liu, Neil Kaplowitz
Acute and chronic liver injury results in hepatocyte death and turnover. If injury becomes chronic, the continuous cell death and turnover leads to chronic inflammation, fibrosis and ultimately cirrhosis and hepatocellular carcinoma. Controlling liver cell death both in acute injury, to rescue the liver from acute liver failure, and in chronic injury, to curb secondary inflammation and fibrosis, is of paramount importance as a therapeutic strategy. Both apoptosis and necrosis occur in the liver, but the occurrence of necroptosis in the liver and its contribution to liver disease is controversial...
2016: Cell Death Discovery
https://www.readbyqxmd.com/read/27917412/zbp1-dai-is-an-innate-sensor-of-influenza-virus-triggering-the-nlrp3-inflammasome-and-programmed-cell-death-pathways
#11
Teneema Kuriakose, Si Ming Man, R K Subbarao Malireddi, Rajendra Karki, Sannula Kesavardhana, David E Place, Geoffrey Neale, Peter Vogel, Thirumala-Devi Kanneganti
The interferon-inducible protein Z-DNA binding protein 1 (ZBP1, also known as DNA-dependent activator of IFN-regulatory factors (DAI) and DLM-1) was identified as a dsDNA sensor, which instigates innate immune responses. However, this classification has been disputed and whether ZBP1 functions as a pathogen sensor during an infection has remained unknown. Herein, we demonstrated ZBP1-mediated sensing of the influenza A virus (IAV) proteins NP and PB1, triggering cell death and inflammatory responses via the RIPK1-RIPK3-Caspase-8 axis...
August 5, 2016: Science Immunology
https://www.readbyqxmd.com/read/27901113/programmed-necrosis-a-new-mechanism-of-steroidogenic-luteal-cell-death-and-elimination-during-luteolysis-in-cows
#12
Takuo Hojo, Marta J Siemieniuch, Karolina Lukasik, Katarzyna K Piotrowska-Tomala, Agnieszka W Jonczyk, Kiyoshi Okuda, Dariusz J Skarzynski
Programmed necrosis (necroptosis) is an alternative form of programmed cell death that is regulated by receptor-interacting protein kinase (RIPK) 1 and 3-dependent, but is a caspase (CASP)-independent pathway. In the present study, to determine if necroptosis participates in bovine structural luteolysis, we investigated RIPK1 and RIPK3 expression throughout the estrous cycle, during prostaglandin F2α (PGF)-induced luteolysis in the bovine corpus luteum (CL), and in cultured luteal steroidogenic cells (LSCs) after treatment with selected luteolytic factors...
November 30, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27886851/the-role-of-necroptosis-in-pulmonary-diseases
#13
REVIEW
Kenji Mizumura, Shuichiro Maruoka, Yasuhiro Gon, Augustine M K Choi, Shu Hashimoto
By regulating the cell number and eliminating harmful cells, programmed cell death plays a critical role in development, homeostasis, and disease. While apoptosis is a recognized form of programmed cell death, necrosis was considered a type of uncontrolled cell death induced by extreme physical or chemical stress. However, recent studies have revealed the existence of a genetically programmed and regulated form of necrosis, termed necroptosis. Necroptosis is defined as necrotic cell death that is dependent on receptor-interacting protein kinase 3 (RIPK3)...
November 2016: Respiratory Investigation
https://www.readbyqxmd.com/read/27832137/atp-competitive-mlkl-binders-have-no-functional-impact-on-necroptosis
#14
Bin Ma, Doug Marcotte, Murugan Paramasivam, Klaus Michelsen, Ti Wang, Andrea Bertolotti-Ciarlet, John Howard Jones, Ben Moree, Margaret Butko, Joshua Salafsky, Xin Sun, Timothy McKee, Laura F Silvian
MLKL is a pore forming pseudokinase involved in the final stage of necroptosis, a form of programmed cell death. Its phosphorylation by RIPK3 is necessary for triggering necroptosis but not for triggering apoptosis, which makes it a unique target for pharmacological inhibition to block necroptotic cell death. This mechanism has been described as playing a role in disease progression in neurodegenerative and inflammatory diseases. A type II kinase inhibitor (cpd 1) has been described that reportedly binds to the MLKL pseudokinase domain and prevents necroptosis...
2016: PloS One
https://www.readbyqxmd.com/read/27831558/ripk1-protects-from-tnf-%C3%AE-mediated-liver-damage-during-hepatitis
#15
Aveline Filliol, Claire Piquet-Pellorce, Jacques Le Seyec, Muhammad Farooq, Valentine Genet, Catherine Lucas-Clerc, John Bertin, Peter J Gough, Marie-Thérèse Dimanche-Boitrel, Peter Vandenabeele, Mathieu Jm Bertrand, Michel Samson
Cell death of hepatocytes is a prominent characteristic in the pathogenesis of liver disease, while hepatolysis is a starting point of inflammation in hepatitis and loss of hepatic function. However, the precise molecular mechanisms of hepatocyte cell death, the role of the cytokines of hepatic microenvironment and the involvement of intracellular kinases, remain unclear. Tumor necrosis factor alpha (TNF-α) is a key cytokine involved in cell death or survival pathways and the role of RIPK1 has been associated to the TNF-α-dependent signaling pathway...
November 10, 2016: Cell Death & Disease
https://www.readbyqxmd.com/read/27819682/ripk1-inhibits-zbp1-driven-necroptosis-during-development
#16
Kim Newton, Katherine E Wickliffe, Allie Maltzman, Debra L Dugger, Andreas Strasser, Victoria C Pham, Jennie R Lill, Merone Roose-Girma, Søren Warming, Margaret Solon, Hai Ngu, Joshua D Webster, Vishva M Dixit
Receptor-interacting protein kinase 1 (RIPK1) promotes cell survival-mice lacking RIPK1 die perinatally, exhibiting aberrant caspase-8-dependent apoptosis and mixed lineage kinase-like (MLKL)-dependent necroptosis. However, mice expressing catalytically inactive RIPK1 are viable, and an ill-defined pro-survival function for the RIPK1 scaffold has therefore been proposed. Here we show that the RIP homotypic interaction motif (RHIM) in RIPK1 prevents the RHIM-containing adaptor protein ZBP1 (Z-DNA binding protein 1; also known as DAI or DLM1) from activating RIPK3 upstream of MLKL...
December 1, 2016: Nature
https://www.readbyqxmd.com/read/27819681/ripk1-counteracts-zbp1-mediated-necroptosis-to-inhibit-inflammation
#17
Juan Lin, Snehlata Kumari, Chun Kim, Trieu-My Van, Laurens Wachsmuth, Apostolos Polykratis, Manolis Pasparakis
Receptor-interacting protein kinase 1 (RIPK1) regulates cell death and inflammation through kinase-dependent and -independent functions. RIPK1 kinase activity induces caspase-8-dependent apoptosis and RIPK3 and mixed lineage kinase like (MLKL)-dependent necroptosis. In addition, RIPK1 inhibits apoptosis and necroptosis through kinase-independent functions, which are important for late embryonic development and the prevention of inflammation in epithelial barriers. The mechanism by which RIPK1 counteracts RIPK3-MLKL-mediated necroptosis has remained unknown...
December 1, 2016: Nature
https://www.readbyqxmd.com/read/27811014/regulated-necrosis-related-molecule-mrna-expression-in-humans-and-mice-and-in-murine-acute-tissue-injury-and-systemic-autoimmunity-leading-to-progressive-organ-damage-and-progressive-fibrosis
#18
Mohsen Honarpisheh, Jyaysi Desai, Julian A Marschner, Marc Weidenbusch, Maciej Lech, Volker Vielhauer, Hans-Joachim Anders, Shrikant R Mulay
The species-specific, as well as organ-specific expression of regulated necrosis (RN)-related molecules, is not known. We determined the expression levels of tumour necrosis factor receptor-1 (TNFR1), receptor activated protein kinase (RIPK)1, RIPK3, mixed lineage kinase domain-like (MLKL), CASP8, Fas-associated protein with death domain (FADD), cellular inhibitor of apoptosis protein (CIAP)1, CIAP2, glutathione peroxidase-4 (GPX4), cyclophilin D (CYPD), CASP1, NLRP3 and poly(ADP-ribose) polymerase-1 (PARP1) in human and mouse solid organs...
December 2016: Bioscience Reports
https://www.readbyqxmd.com/read/27780064/axonal-degeneration-ripk1-multitasking-in-als
#19
Kristin Politi, Serge Przedborski
A recent study reports that microglia and oligodendrocytes promote motor neuron degeneration by inducing inflammation and necroptosis in a manner dependent on receptor-interacting kinase 1 (RIPK1). These findings could be significant for our understanding of the neurobiology and treatment of neurodegenerative diseases like amyotrophic lateral sclerosis.
October 24, 2016: Current Biology: CB
https://www.readbyqxmd.com/read/27778032/activation-of-necroptosis-in-a-rat-model-of-acute-respiratory-distress-syndrome-induced-by-oleic-acid
#20
Long Pan, Dun-Chen Yao, Yu-Zhong Yu, Bing-Jun Chen, Sheng-Jie Li, Gui-He Hu, Chang Xi, Zi-Hui Wang, Jian-Hua Li, Jie Long, Yong-Sheng Tu
The present study was aimed to investigate the role of necroptosis in the pathogenesis of acute respiratory distress syndrome (ARDS). The rat model of ARDS was induced by intravenous injection of oleic acid (OA), and observed for 4 h. The lung injury was evaluated by arterial blood gas, lung wet-dry weight ratio (W/D) and histological analyses. Simultaneously, bronchoalveolar lavage fluid (BALF) was collected for total and differential cell analysis and total protein determination. Tumor necrosis factor alpha (TNF-α) level in BALF was determined with a rat TNF-α ELISA kit...
October 25, 2016: Sheng Li Xue Bao: [Acta Physiologica Sinica]
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