Histone Deacetylase Inhibitor (SAHA) Reduces Mortality in an Endotoxemia Mouse Model by Suppressing Glycolysis

  • Yunchen Wu
    School of Basic Medical Sciences, Shenzhen University, Shenzhen 518055, China
  • Yudan He
    School of Basic Medical Sciences, Shenzhen University, Shenzhen 518055, China
  • Chen Liu
    School of Basic Medical Sciences, Shenzhen University, Shenzhen 518055, China
  • Charlotte Ehle
    Center for Molecular Biomedicine, Institute of Biochemistry and Biophysics, Friedrich Schiller University Jena, 07745 Jena, Germany
  • Aishwarya Iyer-Bierhoff
    Center for Molecular Biomedicine, Institute of Biochemistry and Biophysics, Friedrich Schiller University Jena, 07745 Jena, Germany
  • Bing Liu
    School of Basic Medical Sciences, Shenzhen University, Shenzhen 518055, China
  • Thorsten Heinzel
    Center for Molecular Biomedicine, Institute of Biochemistry and Biophysics, Friedrich Schiller University Jena, 07745 Jena, Germany
  • Shaojun Xing
    School of Basic Medical Sciences, Shenzhen University, Shenzhen 518055, China

抄録

<jats:p>Sepsis is a life-threatening medical emergency triggered by excessive inflammation in response to an infection. High mortality rates and limited therapeutic options pose significant challenges in sepsis treatment. Histone deacetylase inhibitors (HDACi), such as suberoylanilide hydroxamic acid (SAHA), have been proposed as potent anti-inflammatory agents for treating inflammatory diseases. However, the underlying mechanisms of sepsis treatment remain poorly understood. In this study, we investigated the effects of SAHA treatment in the lipopolysaccharide (LPS)-induced endotoxemia mouse model as it closely mimics the early stages of the systemic inflammation of sepsis. Our results demonstrate a reduced inflammatory mediator secretion and improved survival rates in mice. Using quantitative acetylomics, we found that SAHA administration increases the acetylation of lactate dehydrogenase (LDHA), and consequently inhibits LDHA activity. Notably, the reduced enzyme activity of LDHA results in a reduced rate of glycolysis. Furthermore, our experiments with bone marrow-derived macrophages (BMDMs) show that SAHA administration reduced oxidative stress and extracellular ATP concentrations, ultimately blunting inflammasome activation. Overall, our study provides insights into the mechanism underlying SAHA’s therapeutic effects in sepsis treatment and highlights LDHA as a potential target for developing novel sepsis treatment.</jats:p>

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