期刊
BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR BASIS OF DISEASE
卷 1864, 期 10, 页码 3234-3246出版社
ELSEVIER
DOI: 10.1016/j.bbadis.2018.07.010
关键词
Circulating histones; Autophagy; Apoptosis; Toll-like receptors; Endothelial cells
资金
- INCLIVA Biomedical Research Institute
- Generalitat Valenciana [GV/2014/132]
- AES2016 (ISCIII) [PI16/01036]
- European Regional Development Fund (ERDF)
- Grand Challenges Canada
- Ministerio de Economia y Competitividad, Instituto de Salud Carlos III - FEDER-ERDF (Red de Investigacion Cardiovascular grant) [RD12/0042/0052, FIS PI13/00617, PI16/00229]
Circulating histones have been proposed as targets for therapy in sepsis and hyperinflammatory symptoms. However, the proposed strategies have failed in clinical trials. Although different mechanisms for histone-related cytotoxicity are being explored, those mediated by circulating histones are not fully understood. Extracellular histones induce endothelial cell death, thereby contributing to the pathogenesis of complex diseases such as sepsis and septic shock. Therefore, the comprehension of cellular responses triggered by histones is capital to design effective therapeutic strategies. Here we report how extracellular histones induce autophagy and apoptosis in a dose-dependent manner in cultured human endothelial cells. In addition, we describe how histones regulate these pathways via Sestrin2/AMPK/ULK1-mTOR and AKT/mTOR. Furthermore, we evaluate the effect of Toll-like receptors in mediating autophagy and apoptosis demonstrating how TLR inhibitors do not prevent apoptosis and/or autophagy induced by histones. Our results confirm that histones and autophagic pathways can be considered as novel targets to design therapeutic strategies in endothelial damage.
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