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akt fulminant hepatic failure

Wei Liu, Zhen-Tang Jing, Shu-Xiang Wu, Yun He, Yan-Ting Lin, Wan-Nan Chen, Xin-Jian Lin, Xu Lin
Acute liver failure is a serious clinical problem of which the underlying pathogenesis remains unclear and for which effective therapies are lacking. The Fas receptor/ligand system, which is negatively regulated by AKT, is known to play a prominent role in hepatocytic cell death. We hypothesized that AKT activation may represent a strategy to alleviate Fas-induced fulminant liver failure. We report here that a novel AKT activator, SC79, protects hepatocytes from apoptosis induced by agonistic anti-Fas antibody CH11 (for humans) or Jo2 (for mice) and significantly prolongs the survival of mice given a lethal dose of Jo2...
May 2018: American Journal of Pathology
Huafeng Wang, Huan Zhang, Yuqing Zhang, Dan Wang, Xixi Cheng, Fengrui Yang, Qi Zhang, Zhenyi Xue, Yan Li, Lijuan Zhang, Luhong Yang, Guolin Miao, Daiqing Li, Zhiyu Guan, Yurong Da, Zhi Yao, Fei Gao, Liang Qiao, Li Kong, Rongxin Zhang
Plumbagin is a quinonoid constituent extracted from Plumbago genus, and it exhibits diverse pharmacological effects. This study thoroughly investigated the effects of plumbagin on thioacetamide-induced acute and chronic liver injury. Results shown that plumbagin increased survival rate, reduced liver congestion and inflammation, and decreased macrophages and neutrophils in the fulminant hepatic failure model, and remarkably diminished liver fibrosis and inflammation in the chronic liver injury model. Furthermore, plumbagin significantly suppress the HSCs/myofibroblasts activation by reduced expression of markers α-SMA and COL-1/3, and reduced macrophage in liver...
December 13, 2016: Oncotarget
Xu Cao, Mei Liu, Peng Wang, Dong-Yan Liu
AIM: To investigate the change in intestinal dendritic cell (DC) number in fulminant hepatic failure (FHF). METHODS: An animal model of FHF was created. Intestinal CD11b/c was detected by immunohistochemistry and Western blot. Quantitative real-time polymerase chain reaction (PCR) was used to detect intestinal integrin-α mRNA expression. Intestinal CD83, CD86, CD74, CD3 and AKT were detected by immunohistochemistry, Western blot and PCR. Phosphorylated-AKT (p-AKT) was detected by immunohistochemistry and Western blot...
April 28, 2015: World Journal of Gastroenterology: WJG
Shashikiran Donthamsetty, Wendy M Mars, Anne Orr, Chuanyue Wu, George K Michalopoulos
UNLABELLED: ABSTRACT: BACKGROUND: Programmed cell death or apoptosis is an essential process for tissue homeostasis. Hepatocyte apoptosis is a common mechanism to many forms of liver disease. This study was undertaken to test the role of ILK in hepatocyte survival and response to injury using a Jo-2-induced apoptosis model. METHODS: For survival experiments, ILK KO and WT mice received a single intraperitoneal injection of the agonistic anti-Fas monoclonal antibody Jo-2 at the lethal dose (0...
2011: Comparative Hepatology
Aditya Murthy, Virginie Defamie, David S Smookler, Marco A Di Grappa, Keisuke Horiuchi, Massimo Federici, Maria Sibilia, Carl P Blobel, Rama Khokha
The cell death receptor Fas plays a role in the establishment of fulminant hepatitis, a major cause of drug-induced liver failure. Fas activation elicits extrinsic apoptotic and hepatoprotective signals; however, the mechanisms by which these signals are integrated during disease are unknown. Tissue inhibitor of metalloproteinases 3 (TIMP3) controls the critical sheddase a disintegrin and metalloproteinase 17 (ADAM17) and may dictate stress signaling. Using mice and cells lacking TIMP3, ADAM17, and ADAM17-regulated cell surface molecules, we have found that ADAM17-mediated ectodomain shedding of TNF receptors and EGF family ligands controls activation of multiple signaling cascades in Fas-induced hepatitis...
August 2010: Journal of Clinical Investigation
Hideyuki Suzuki, Mitsuo Toyoda, Norio Horiguchi, Satoru Kakizaki, Tatsuya Ohyama, Daichi Takizawa, Takeshi Ichikawa, Ken Sato, Hitoshi Takagi, Masatomo Mori
BACKGROUND: Apoptosis via the Fas/Fas ligand signalling system plays an important role in the development of various liver diseases. The administration of an agonistic anti-Fas antibody to mice causes massive hepatic apoptosis and fulminant hepatic failure. Several growth factors including hepatocyte growth factor (HGF) have been found to prevent apoptosis. METHODS: In this study, we demonstrated the overexpression of HGF to have a protective effect on Fas-mediated hepatic apoptosis using a transgenic mice (Tg mice) model...
November 2009: Liver International: Official Journal of the International Association for the Study of the Liver
Etsuro Hatano
Death receptor-mediated hepatocyte apoptosis is implicated in a wide range of liver diseases including viral hepatitis, alcoholic hepatitis, ischemia/reperfusion injury, fulminant hepatic failure, cholestatic liver injury, and cancer. Our aim was to clarify the protective pathway in death receptor-mediated hepatocyte apoptosis and the significance of apoptosis in liver injury. In vitro: AdIkappaBsr plus tumor necrosis factor (TNF)-alpha/Jo2 rapidly induced apoptosis in mouse hepatocyte, whereas TNF-alpha/Jo2 alone produced little cytotoxicity...
June 2007: Journal of Gastroenterology and Hepatology
Hanh-Tu Lieu, Marie-Thérèse Simon, Thao Nguyen-Khoa, Messeret Kebede, Alexandre Cortes, Luis Tebar, Andrew J H Smith, Rosemary Bayne, Stephen P Hunt, Christian Bréchot, Laurence Christa
Reg2/RegIIIbeta is the murine homologue of the human secreted HIP/PAP C-type lectin. HIP/PAP transgenic mice were protected against acetaminophen-induced acute liver failure and were stimulated to regenerate post-hepatectomy. To assess the role of Reg2, we used Reg2-/- mice in a model of fulminant hepatitis induced by Fas and in the post-hepatectomy regeneration. Within 4 hours of J0-2 treatment (0.5 microg/g), only 50% of the Reg2-/- mice were alive but with an increased sensitivity to Fas-induced oxidative stress and a decreased level of Bcl-xL...
December 2006: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
Matilde Bustos, Naiara Beraza, Juan-Jose Lasarte, Elena Baixeras, Pilar Alzuguren, Thierry Bordet, Jesus Prieto
BACKGROUND & AIMS: Cardiotrophin-1 (CT-1) is a member of the interleukin 6 (IL-6) family of cytokines, which protect cardiac myocytes against thermal and ischemic insults. In this study, we investigated the expression of CT-1 by liver cells and its possible hepatoprotective properties. METHODS: We analyzed the production, signaling, and antiapoptotic properties of CT-1 in hepatocytes and the expression of this cytokine during liver regeneration. We also investigated whether CT-1 might exert protective effects in animal models of liver damage...
July 2003: Gastroenterology
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