Nandini D P K Manne1,2, Ravikumar Arvapalli1, Vincent A Graffeo3,4, Venkata V K Bandarupalli1, Tolou Shokuhfar5, Sweetu Patel5, Kevin M Rice1, Gautam Kumar Ginjupalli1, Eric R Blough1,6. 1. Center for Diagnostic Nanosystems, Marshall University, Huntington, West Virginia, USA. 2. Department of Public Health, Marshall University, Huntington, West Virginia, USA. 3. Department of Pathology, ST. Mary's medical center, Huntington, West Virginia, USA. 4. Department of Pathology, Joan C. Edwards, School of Medicine, Marshall University, Huntington, West Virginia, USA. 5. Department of Bioengineering, University of Illinois, Chicago, Illinois, USA. 6. Department of Pharmaceutical Sciences and Research, Marshall University, Huntington, West Virginia, USA.
Abstract
BACKGROUND: Hepatic ischemia reperfusion is one the main causes for graft failure following transplantation. Although, the molecular events that lead to hepatic failure following ischemia reperfusion (IR) are diverse and complex, previous studies have shown that excessive formation of reactive oxygen species (ROS) are responsible for hepatic IR injury. Cerium oxide (CeO2) nanoparticles have been previously shown to act as an anti-oxidant and anti-inflammatory agent. Here, we evaluated the protective effects of CeO2 nanoparticles on hepatic ischemia reperfusion injury. METHODS: Male Sprague Dawley rats were randomly assigned to one of the four groups: Control, CeO2 nanoparticle only, hepatic ischemia reperfusion (IR) group and hepatic ischemia reperfusion (IR) plus CeO2 nanoparticle group (IR+ CeO2). Partial warm hepatic ischemia was induced in left lateral and median lobes for 1h, followed by 6h of reperfusion. Animals were sacrificed after 6h of reperfusion and blood and tissue samples were collected and processed for various biochemical experiments. RESULTS: Prophylactic treatment with CeO2 nanoparticles (0.5mg/kg i.v (IR+CeO2 group)) 1 hour prior to hepatic ischemia and subsequent reperfusion injury lead to a decrease in serum levels of alanine aminotransaminase and lactate dehydrogenase at 6 hours after reperfusion. These changes were accompanied by significant decrease in hepatocyte necrosis along with reduction in several serum inflammatory markers such as macrophage derived chemokine, macrophage inflammatory protein-2, KC/GRO, myoglobin and plasminogen activator inhibitor-1. However, immunoblotting demonstrated no significant changes in the levels of apoptosis related protein markers such as bax, bcl2 and caspase 3 in IR and IR+ CeO2 groups at 6 hours suggesting necrosis as the main pathway for hepatocyte death. CONCLUSION: Taken together, these data suggest that CeO2 nanoparticles attenuate IR induced cell death and can be used as a prophylactic agent to prevent hepatic injury associated with graft failure.
BACKGROUND:Hepatic ischemia reperfusion is one the main causes for graft failure following transplantation. Although, the molecular events that lead to hepatic failure following ischemia reperfusion (IR) are diverse and complex, previous studies have shown that excessive formation of reactive oxygen species (ROS) are responsible for hepatic IR injury. Cerium oxide (CeO2) nanoparticles have been previously shown to act as an anti-oxidant and anti-inflammatory agent. Here, we evaluated the protective effects of CeO2 nanoparticles on hepatic ischemia reperfusion injury. METHODS: Male Sprague Dawley rats were randomly assigned to one of the four groups: Control, CeO2 nanoparticle only, hepatic ischemia reperfusion (IR) group and hepatic ischemia reperfusion (IR) plus CeO2 nanoparticle group (IR+ CeO2). Partial warm hepatic ischemia was induced in left lateral and median lobes for 1h, followed by 6h of reperfusion. Animals were sacrificed after 6h of reperfusion and blood and tissue samples were collected and processed for various biochemical experiments. RESULTS: Prophylactic treatment with CeO2 nanoparticles (0.5mg/kg i.v (IR+CeO2 group)) 1 hour prior to hepatic ischemia and subsequent reperfusion injury lead to a decrease in serum levels of alanine aminotransaminase and lactate dehydrogenase at 6 hours after reperfusion. These changes were accompanied by significant decrease in hepatocyte necrosis along with reduction in several serum inflammatory markers such as macrophage derived chemokine, macrophage inflammatory protein-2, KC/GRO, myoglobin and plasminogen activator inhibitor-1. However, immunoblotting demonstrated no significant changes in the levels of apoptosis related protein markers such as bax, bcl2 and caspase 3 in IR and IR+ CeO2 groups at 6 hours suggesting necrosis as the main pathway for hepatocyte death. CONCLUSION: Taken together, these data suggest that CeO2 nanoparticles attenuate IR induced cell death and can be used as a prophylactic agent to prevent hepatic injury associated with graft failure.
Authors: Hamideh Parhiz; Makan Khoshnejad; Jacob W Myerson; Elizabeth Hood; Priyal N Patel; Jacob S Brenner; Vladimir R Muzykantov Journal: Adv Drug Deliv Rev Date: 2018-07-03 Impact factor: 15.470
Authors: Kirsty Meldrum; Sarah B Robertson; Isabella Römer; Tim Marczylo; Lareb S N Dean; Andrew Rogers; Timothy W Gant; Rachel Smith; Terry D Tetley; Martin O Leonard Journal: Part Fibre Toxicol Date: 2018-05-23 Impact factor: 9.400
Authors: Paul V Ritschl; Julia Günther; Lena Hofhansel; Anja A Kühl; Arne Sattler; Stefanie Ernst; Frank Friedersdorff; Susanne Ebner; Sascha Weiss; Claudia Bösmüller; Annemarie Weissenbacher; Rupert Oberhuber; Benno Cardini; Robert Öllinger; Stefan Schneeberger; Matthias Biebl; Christian Denecke; Christian Margreiter; Thomas Resch; Felix Aigner; Manuel Maglione; Johann Pratschke; Katja Kotsch Journal: Front Immunol Date: 2018-08-24 Impact factor: 7.561