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- W4281710986 abstract "Resuscitation of trauma patients after hemorrhagic shock causes global I/R, which may contribute to organ dysfunction. Oxidative stress resulting from I/R is known to induce signaling pathways leading to the production of inflammatory molecules culminating in organ dysfunction/injury. Our recent work demonstrated that oxidative stress was able to induce activation of the mitochondrial antiviral signaling protein (MAVS), a protein known to be involved in antiviral immunity, in an in vitro model. We therefore hypothesized that the MAVS pathway might be involved in I/R-induced inflammation and injury. The present studies show that MAVS is activated in vivo by liver I/R and in vitro in RAW 264.7 cells by hypoxia/reoxygenation (H/R). We utilized both in vivo (liver I/R in MAVS knockout mice) and in vitro (MAVS siRNA in RAW 264.7 cells followed by H/R) models to study the role of MAVS activation on downstream events. In vivo , we demonstrated augmented injury and inflammation in MAVS knockout mice compared with wild-type animals; as shown by increased hepatocellular injury, induction of hepatocyte apoptosis augmented plasma TNF-α levels. Further, in vitro silencing of MAVS by specific siRNA in RAW 264.7 and exposure of the cells to H/R caused activation of mitophagy. This may represent a compensatory response to increased liver inflammation. We conclude that activation of MAVS by hypoxia/reoxygenation dampens inflammation, potentially suggesting a novel target for intervention." @default.
- W4281710986 created "2022-06-13" @default.
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- W4281710986 date "2022-07-01" @default.
- W4281710986 modified "2023-10-18" @default.
- W4281710986 title "ACTIVATION OF THE MITOCHONDRIAL ANTIVIRAL SIGNALING PROTEIN (MAVS) FOLLOWING LIVER ISCHEMIA/REPERFUSION AND ITS EFFECT ON INFLAMMATION AND INJURY" @default.
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- W4281710986 doi "https://doi.org/10.1097/shk.0000000000001949" @default.
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