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https://www.readbyqxmd.com/read/28315674/dichotomy-between-receptor-interacting-protein-1-and-receptor-interacting-protein-3-mediated-necroptosis-in-experimental-pancreatitis
#1
Jianghong Wu, Tunike Mulatibieke, Jianbo Ni, Xiao Han, Bin Li, Yue Zeng, Rong Wan, Xingpeng Wang, Guoyong Hu
Pancreatic acinar cell necrosis and inflammatory responses are two key pathologic processes in acute pancreatitis (AP), which determines the severity and outcome of the disease. Recent studies suggest that necroptosis, a programed form of necrosis, is involved in the pathogenesis of AP, but the underlying mechanisms remain unknown. We investigated the expression of necrosome components, including receptor-interacting protein (RIP) 1, RIP3, and mixed lineage kinase domain-like (MLKL), and the molecular mechanisms in pancreatitis-associated necroptosis...
March 15, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28270653/rip-1-c-flipl-induce-hepatic-cancer-cell-apoptosis-through-regulating-tumor-necrosis-factor-related-apoptosis-inducing-ligand-trail
#2
Jichun Sun, Xiao Yu, Changfa Wang, Can Yu, Zhiqiang Li, Wanpin Nie, Xundi Xu, Xiongying Miao, Xiaoxin Jin
BACKGROUND Almost all hepatic cancer cells have resistance to tumor necrosis factor-related apoptosis-inducing ligand (TRAIL)-induced apoptosis. c-FLIPL and RIP-1 are apoptotic negative regulatory factors. This study investigated the role of c-FLIPL and RIP-1 in hepatic cancer cell resistance to TRAIL-induced apoptosis. MATERIAL AND METHODS HepG2 cells were treated by TRAIL, RIP-1 siRNA, and/or BY11-7082. Cell viability was detected by MTT assay. Cell apoptosis was tested by flow cytometry. DISC component proteins, RIP-1, and p-p65 were measured by Western blot...
March 8, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28260985/involvement-of-necroptosis-a-newly-recognized-cell-death-type-in-steroid-induced-osteonecrosis-in-a-rabbit-model
#3
Toru Ichiseki, Shusuke Ueda, Yoshimichi Ueda, Masanobu Tuchiya, Ayumi Kaneuji, Norio Kawahara
We investigated the role of programmed necrosis (necroptosis), a newly recognized form of cell necrosis that has been implicated in the development of steroid-induced osteonecrosis. We used an osteonecrosis model in which 30 Japanese white rabbits each weighing 3.5kg were injected once with methylprednisolone at 20 mg/kg body weight into the right gluteal muscle. Ten animals killed 14 days thereafter were designated as S14d groups, while another 10 animals injected with necroptosis, a specific inhibitor of necrostatin-1 i...
2017: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/28252551/effect-of-baicalin-on-oxygen-glucose-deprivation-induced-endothelial-cell-damage
#4
Si Luo, Shi Li, Lei Zhu, Shu-Huan Fang, Jun-Li Chen, Qing-Qing Xu, Hong-Ying Li, Na-Chuan Luo, Cong Yang, Dan Luo, Lin Li, Xiao-Hui Ma, Rong Zhang, Hong Wang, Yun-Bo Chen, Qi Wang
Baicalin, a plant-derived flavonoid, has been reported to exert neuroprotective effects on ischemia-like or excitotoxic injury. To confirm this function and explore the possible mechanism, we investigated the protective effect of baicalin on an in-vitro model of ischemia (oxygen-glucose deprivation-treated endothelial cell). In the present study, we found that baicalin (100 μM) inhibited cell death, reduced cell membrane damage, and maintained the integrity of the nucleus. Flow cytometric analysis and Hoechst 33258/propidium iodide double staining results showed that the necroptosis ratio decreased with baicalin treatment...
March 1, 2017: Neuroreport
https://www.readbyqxmd.com/read/28205631/immature-mice-are-more-susceptible-than-adult-mice-to-acetaminophen-induced-acute-liver-injury
#5
Yan Lu, Cheng Zhang, Yuan-Hua Chen, Hua Wang, Zhi-Hui Zhang, Xi Chen, De-Xiang Xu
Acetaminophen (APAP) overdose induces acute liver injury. The aim of the present study was to analyze the difference of susceptibility between immature and adult mice to APAP-induced acute liver injury. Weanling immature and adult mice were injected with APAP (300 mg/kg). As expected, immature mice were more susceptible than adult mice to APAP-induced acute liver injury. APAP-evoked hepatic c-Jun N-terminal kinase phosphorylation was stronger in immature mice than in adult mice. Hepatic receptor-interacting protein (RIP)1 was obviously activated at APAP-exposed immature and adult mice...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28074952/upregulation-of-caveolin-1-by-mulberry-leaf-extract-and-its-major-components-chlorogenic-acid-derivatives-attenuates-alcoholic-steatohepatitis-via-inhibition-of-oxidative-stress
#6
Yi-Ju Lee, Jeng-Dong Hsu, Wea-Lung Lin, Shao-Hsuan Kao, Chau-Jong Wang
Excessive alcohol uptake exerts hepatocellular toxicity, ultimately leading to multiple liver diseases such as steatohepatitis and liver cirrhosis. Here, we aimed to explore the effects of mulberry leaf extract (MLE) and its major components chlorogenic acid (CGA) and neochlorogenic acid (nCGA) on alcoholic steatohepatitis. We determined the composition of MLE using liquid chromatography-mass spectrometric (LC-MS) analysis, which showed that MLE consisted of mainly chlorogenic acid derivatives and other polyphenols...
January 11, 2017: Food & Function
https://www.readbyqxmd.com/read/27941320/necroptosis-induced-by-ad-hgf-activates-endogenous-c-kit-cardiac-stem-cells-and-promotes-cardiomyocyte-proliferation-and-angiogenesis-in-the-infarcted-aged-heart
#7
Jiabao Liu, Peng Wu, Hao Wang, Yunle Wang, Yingqiang Du, Weili Cheng, Zhihui Xu, Ningtian Zhou, Liansheng Wang, Zhijian Yang
BACKGROUND/AIMS: The discovery of c-kit+ cardiac stem cells (CSCs) provided us with new therapeutic targets to repair the damaged heart. However, the precise mechanisms regulating CSC proliferation and differentiation in the aged heart remained elusive. Necroptosis, a type of regulated cell death, has recently been shown to occur following myocardial infarction (MI); however, its effect on c-kit+ CSCs remains unknown. We investigated the effects of hepatocyte growth factor (HGF) and necroptosis on the proliferation and differentiation of endogenous c-kit+ CSCs in aged rat hearts following MI...
2016: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/27932417/molecular-pathways-the-necrosome-a-target-for-cancer-therapy
#8
Lena Seifert, George Miller
Necroptosis is a caspase-8-independent cell death that requires coactivation of receptor-interacting protein 1 (RIP1) and receptor-interacting protein 3 (RIP3) kinases. The necrosome is a complex consisting of RIP1, RIP3, and Fas-associated protein with death domain leading to activation of the pseudokinase mixed lineage kinase like followed by a rapid plasma membrane rupture and inflammatory response through the release of damage-associated molecular patterns and cytokines. The necrosome has been shown to be relevant in multiple tumor types, including pancreatic adenocarcinoma, melanoma, and several hematologic malignancies...
March 1, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/27867009/a-polar-and-nucleotide-dependent-mechanism-of-action-for-rad51-paralogs-in-rad51-filament-remodeling
#9
Martin R G Taylor, Mário Špírek, Chu Jian Ma, Raffaella Carzaniga, Tohru Takaki, Lucy M Collinson, Eric C Greene, Lumir Krejci, Simon J Boulton
Central to homologous recombination in eukaryotes is the RAD51 recombinase, which forms helical nucleoprotein filaments on single-stranded DNA (ssDNA) and catalyzes strand invasion with homologous duplex DNA. Various regulatory proteins assist this reaction including the RAD51 paralogs. We recently discovered that a RAD51 paralog complex from C. elegans, RFS-1/RIP-1, functions predominantly downstream of filament assembly by binding and remodeling RAD-51-ssDNA filaments to a conformation more proficient for strand exchange...
December 1, 2016: Molecular Cell
https://www.readbyqxmd.com/read/27856241/palmitate-induces-rip1-rip3-dependent-necrosis-via-mlkl-mediated-pore-formation-in-the-plasma-membrane-of-raw-264-7%C3%A2-cells
#10
Seong Keun Kim, Mihee Yun, Gimoon Seo, Ji-Young Lee, Seong-Beom Lee
We previously reported that palmitate induces receptor-interacting protein (RIP)1-dependent necrosis in RAW 264.7 macrophage cells. In response to death receptor stimuli, RIP1 is reported to activate RIP3, which causes the phosphorylation and translocation of mixed-lineage kinase domain-like (MLKL) protein to the plasma membrane, subsequent pore formation in the plasma membrane, and necrotic cell death. In the current study, we investigated the role of MLKL in palmitate-induced, RIP1/RIP3-dependent necrotic cell death in RAW 264...
January 8, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27738385/cyld-promotes-tnf-%C3%AE-induced-cell-necrosis-mediated-by-rip-1-in-human-lung-cancer-cells
#11
Xing Lin, Qianshun Chen, Chen Huang, Xunyu Xu
Lung cancer is one of the most common cancers in the world. Cylindromatosis (CYLD) is a deubiquitination enzyme and contributes to the degradation of ubiquitin chains on RIP1. The aim of the present study is to investigate the levels of CYLD in lung cancer patients and explore the molecular mechanism of CYLD in the lung cancer pathogenesis. The levels of CYLD were detected in human lung cancer tissues and the paired paracarcinoma tissues by real-time PCR and western blotting analysis. The proliferation of human lung cancer cells was determined by MTT assay...
2016: Mediators of Inflammation
https://www.readbyqxmd.com/read/27732109/ischemia-reperfusion-injury-triggers-tnf%C3%AE-induced-necroptosis-in-rat-retina
#12
Cho Rong Kim, Jie Hyun Kim, Hae-Young Lopilly Park, Chan Kee Park
PURPOSE: A recent study revealed a novel form of cell death, termed necroptosis, or programmed necrosis. Previous research indicated that after ischemia-reperfusion (IR) injury to the retina, Tumor Necrosis Factor α (TNFα) is increased, which may activate necroptosis. This study observed macroglial cell activation, and in particular, astrocyte activation, after the release of TNFα and other necroptosis factors in the rat retina due to IR. MATERIALS AND METHODS: IR was induced in the retinas of adult male Sprague-Dawley rats by increasing the intraocular pressure to 160 mmHg and then allowing reperfusion...
October 12, 2016: Current Eye Research
https://www.readbyqxmd.com/read/27631783/klhdc10-deficiency-protects-mice-against-tnf%C3%AE-induced-systemic-inflammation
#13
Namiko Yamaguchi, Shiori Sekine, Isao Naguro, Yusuke Sekine, Hidenori Ichijo
Systemic inflammatory response syndrome (SIRS) is a form of fatal acute inflammation for which there is no effective treatment. Here, we revealed that the ablation of Kelch domain containing 10 (KLHDC10), which we had originally identified as an activator of Apoptosis Signal-regulating Kinase 1 (ASK1), protects mice against TNFα-induced SIRS. The disease development of SIRS is mainly divided into two stages. The early stage is characterized by TNFα-induced systemic necroptosis, a regulated form of necrosis mediated by Receptor-interacting protein (RIP) 1/3 kinases...
2016: PloS One
https://www.readbyqxmd.com/read/27616656/caspase-inhibition-prevents-tumor-necrosis-factor-%C3%AE-induced-apoptosis-and-promotes-necrotic-cell-death-in-mouse-hepatocytes-in%C3%A2-vivo-and-in%C3%A2-vitro
#14
Hong-Min Ni, Mitchell R McGill, Xiaojuan Chao, Benjamin L Woolbright, Hartmut Jaeschke, Wen-Xing Ding
How different cell death modes and cell survival pathways cross talk remains elusive. We determined the interrelation of apoptosis, necrosis, and autophagy in tumor necrosis factor (TNF)-α/actinomycin D (ActD) and lipopolysaccharide/D-galactosamine (GalN)-induced hepatotoxicity in vitro and in vivo. We found that TNF-α/ActD-induced apoptosis was completely blocked by a general caspase inhibitor ZVAD-fmk at 24 hours but hepatocytes still died by necrosis at 48 hours. Inhibition of caspases also protected mice against lipopolysaccharide/GalN-induced apoptosis and liver injury at the early time point, but this protection was diminished after prolonged treatment by switching apoptosis to necrosis...
October 2016: American Journal of Pathology
https://www.readbyqxmd.com/read/27521978/role-of-necroptosis-in-autophagy-signaling-during-hepatic-ischemia-and-reperfusion
#15
Jeong-Min Hong, Seok-Joo Kim, Sun-Mee Lee
Ischemia and reperfusion (I/R) is a complex phenomenon involving massive inflammation and cell death. Necroptosis refers to a newly described cell death as "programmed necrosis" that is controlled by receptor-interacting protein kinase (RIP) 1 and RIP3, which is involved in the pathogenesis of several inflammatory diseases. Autophagy is an essential cytoprotective system that is rapidly activated in response to various stimuli and involves crosstalk between different modes of cell death and inflammation. In this study, we investigated pattern changes in necroptosis and its role in autophagy signaling during hepatic I/R...
October 1, 2016: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/27267809/smac-mimetic-triggers-necroptosis-in-pancreatic-carcinoma-cells-when-caspase-activation-is-blocked
#16
Sabine Hannes, Behnaz Ahangarian Abhari, Simone Fulda
Evasion of apoptosis represents a key mechanism of treatment resistance of pancreatic cancer (PC) and contributes to the poor prognosis of this cancer type. Here, we report that induction of necroptosis is an alternative strategy to trigger programmed cell death in apoptosis-resistant PC cells. We show that the second mitochondrial activator of caspases (Smac) mimetic BV6 that antagonizes inhibitor of apoptosis (IAP) proteins induces necroptosis in PC cells in which apoptosis is blocked by the caspase inhibitor zVAD...
September 28, 2016: Cancer Letters
https://www.readbyqxmd.com/read/27216862/protein-tyrosine-phosphatase-shp-1-resurgence-as-new-drug-target-for-human-autoimmune-disorders
#17
REVIEW
Yadhu Sharma, Samina Bashir, Puja Bhardwaj, Altaf Ahmad, Farah Khan
Recognition of self-antigen and its destruction by the immune system is the hallmark of autoimmune diseases. During the developmental stages, immune cells are introduced to the self-antigen, for which tolerance develops. The inflammatory insults that break the immune tolerance provoke immune system against self-antigen, progressively leading to autoimmune diseases. SH2 domain containing protein tyrosine phosphatase (PTP), SHP-1, was identified as hematopoietic cell-specific PTP that regulates immune function from developing immune tolerance to mediating cell signaling post-immunoreceptor activation...
August 2016: Immunologic Research
https://www.readbyqxmd.com/read/27080932/therapeutic-hypothermia-attenuates-tissue-damage-and-cytokine-expression-after-traumatic-brain-injury-by-inhibiting-necroptosis-in-the-rat
#18
Tao Liu, Dong-xu Zhao, Hua Cui, Lei Chen, Ying-hui Bao, Yong Wang, Ji-yao Jiang
Necroptosis has been shown as an alternative form of cell death in many diseases, but the detailed mechanisms of the neuron loss after traumatic brain injury (TBI) in rodents remain unclear. To investigate whether necroptosis is induced after TBI and gets involved in the neuroprotecton of therapeutic hypothermia on the TBI, we observed the pathological and biochemical change of the necroptosis in the fluid percussion brain injury (FPI) model of the rats. We found that receptor-interacting protein (RIP) 1 and 3, and mixed lineage kinase domain-like protein (MLKL), the critical downstream mediators of necroptosis recently identified in vivo, as well as HMGB1 and the pro-inflammation cytokines TNF-α, IL-6 and IL-18, were increased at an early phase (6 h) in cortex after TBI...
April 15, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27049944/the-necrosome-promotes-pancreatic-oncogenesis-via-cxcl1-and-mincle-induced-immune-suppression
#19
Lena Seifert, Gregor Werba, Shaun Tiwari, Nancy Ngoc Giao Ly, Sara Alothman, Dalia Alqunaibit, Antonina Avanzi, Rocky Barilla, Donnele Daley, Stephanie H Greco, Alejandro Torres-Hernandez, Matthew Pergamo, Atsuo Ochi, Constantinos P Zambirinis, Mridul Pansari, Mauricio Rendon, Daniel Tippens, Mautin Hundeyin, Vishnu R Mani, Cristina Hajdu, Dannielle Engle, George Miller
Neoplastic pancreatic epithelial cells are believed to die through caspase 8-dependent apoptotic cell death, and chemotherapy is thought to promote tumour apoptosis. Conversely, cancer cells often disrupt apoptosis to survive. Another type of programmed cell death is necroptosis (programmed necrosis), but its role in pancreatic ductal adenocarcinoma (PDA) is unclear. There are many potential inducers of necroptosis in PDA, including ligation of tumour necrosis factor receptor 1 (TNFR1), CD95, TNF-related apoptosis-inducing ligand (TRAIL) receptors, Toll-like receptors, reactive oxygen species, and chemotherapeutic drugs...
April 14, 2016: Nature
https://www.readbyqxmd.com/read/27035122/receptor-interacting-protein-1-promotes-the-growth-and-invasion-in-gastric-cancer
#20
Guangwei Zhu, Jianxin Ye, Yongjian Huang, Wei Zheng, Jin Hua, Shugang Yang, Jinfu Zhuang, Jinzhou Wang
The receptor-interacting protein-1 (RIP-1) is an important molecular in inflammation signaling pathways, but the role of RIP-1 in gastric cancer is largely unknown. In this study, we tested the expression of RIP-1 in gastric cancer samples and analyzed the effects of expression of RIP-1 on the prognosis in gastric cancer patients. We analyzed the role of the RIP-1 in gastric cancer cells and addressed the functional role of RIP-1 using a xenograft mouse model. A lentivirus-based effective RIP-1 siRNA vector was infected into HGC and AGS cells...
June 2016: International Journal of Oncology
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