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Murine Model of Metastatic Liver Tumors in the Setting of Ischemia Reperfusion Injury
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Murine Model of Metastatic Liver Tumors in the Setting of Ischemia Reperfusion Injury

Published on: August 30, 2019

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Tanshinone IIA activates autophagy to reduce liver ischemia-reperfusion injury by MEK/ERK/mTOR pathway

Yang Wang, Qi Ni, Qing Ye

    Die Pharmazie
    |July 14, 2018
    PubMed

    Insights

    Tanshinone IIA enhances autophagy in liver cells during ischemia-reperfusion injury by activating the MEK/ERK/mTOR pathway. This process reduces oxidative stress and protects liver cells, suggesting TanIIA as a potential therapeutic for liver injury.

    Area of Science:

    • Cell Biology
    • Hepatology
    • Pharmacology

    Background:

    • Autophagy is a crucial cellular process for managing stress, including ischemia-reperfusion (I/R) injury.
    • Tanshinone IIA (TanIIA) is known to affect autophagy and protect against myocardial disease.
    • The role of TanIIA in regulating autophagy in hepatocytes during I/R injury remains unexplored.

    Purpose of the Study:

    • To investigate the effect of Tanshinone IIA (TanIIA) on autophagy in hepatocytes following liver ischemia-reperfusion (I/R) injury.
    • To elucidate the molecular pathway involved in TanIIA-mediated autophagy regulation.
    • To assess the protective efficacy of TanIIA against liver I/R injury.

    Main Methods:

    • Establishment of a mouse model for liver ischemia-reperfusion (I/R) injury.
    • Pretreatment of mice with Tanshinone IIA (TanIIA).
    • Analysis of autophagy markers, MEK/ERK/mTOR pathway activation, reactive oxygen species (ROS) generation, and hepatocyte apoptosis.

    Main Results:

    • TanIIA pretreatment significantly enhanced autophagy in hepatocytes post-liver I/R.
    • TanIIA activated the MEK/ERK/mTOR pathway, leading to increased autophagy.
    • Enhanced autophagy reduced ROS generation by clearing damaged mitochondria, mitigating liver injury, decreasing inflammatory markers, and reducing hepatocyte apoptosis.

    Conclusions:

    • Tanshinone IIA (TanIIA) effectively enhances autophagy in hepatocytes via the MEK/ERK/mTOR pathway during liver ischemia-reperfusion (I/R) injury.
    • The TanIIA-induced autophagy provides significant protection against liver I/R injury by reducing oxidative stress and inflammation.
    • Moderate use of TanIIA presents a potential therapeutic strategy for clinical management of liver I/R injury.

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