Extracellular heat shock proteins protect U937 cells from H2O2-induced apoptotic cell death
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  • 作者:Lourdes Franco ; Jorge Terrinca ; Ana B. Rodríguez…
  • 关键词:Heat shock proteins ; Cell viability ; Caspase ; H2O2 ; U937 cells
  • 刊名:Molecular and Cellular Biochemistry
  • 出版年:2016
  • 出版时间:January 2016
  • 年:2016
  • 卷:412
  • 期:1-2
  • 页码:19-26
  • 全文大小:760 KB
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  • 作者单位:Lourdes Franco (1)
    Jorge Terrinca (1)
    Ana B. Rodríguez (1)
    Javier Espino (1)
    José A. Pariente (1)

    1. Department of Physiology, Neuroimmunophysiology and Chrononutrition Research Group, Faculty of Science, University of Extremadura, Avda. de Elvas s/n, 06006, Badajoz, Spain
  • 刊物类别:Biomedical and Life Sciences
  • 刊物主题:Life Sciences
    Biochemistry
    Medical Biochemistry
    Oncology
    Cardiology
  • 出版者:Springer Netherlands
  • ISSN:1573-4919
文摘
The cytoprotective role of heat shock proteins (HSPs) has been demonstrated in various cell types however, only few studies have investigated the role of extracellular exposure to HSPs in the survival of human lymphoma cell line U937. In the present study, we investigated the effect of extracellular exposure to four HSPs (HSP90, HSP70, HSP60, and HSP47) on apoptotic cell death induced by either oxidative stress (hydrogen peroxide) or endoplasmic reticulum stress-mediated intracellular calcium overload. It was found that extracellular exposure to HSPs reduced the cytotoxicity induced by hydrogen peroxide, but not that evoked by thapsigargin (a specific inhibitor of cytosolic calcium reuptake which is able to induce endoplasmic reticulum stress with subsequent intracellular calcium overload). Similarly, it was observed that exogenous HSPs were able to suppress the caspase-3 activation induced by hydrogen peroxide. These findings indicate that extracellular HSPs increase the resistance of human lymphoma cell line U937 to apoptotic cell death induced by hydrogen peroxide and diminish oxidative stress-mediated injures. Keywords Heat shock proteins Cell viability Caspase H2O2 U937 cells

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