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Article

Effects of antioxidants and MAPK inhibitors on cell death and reactive oxygen species levels in H2O2‑treated human pulmonary fibroblasts

  • Authors:
    • Woo Hyun Park
  • View Affiliations / Copyright

    Affiliations: Department of Physiology, Medical School, Research Institute for Endocrine Sciences, Chonbuk National University, JeonJu, Jeollabuk‑do 561‑180, Republic of Korea
  • Pages: 1633-1638
    |
    Published online on: February 28, 2013
       https://doi.org/10.3892/ol.2013.1216
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Abstract

H2O2‑induced cytotoxicity in normal human pulmonary fibroblasts (HPFs) is of interest in toxicological research since HPFs are involved in lung inflammation, fibrosis and cancer. The present study investigated the cytotoxic effects of H2O2 on normal HPFs in relation to reactive oxygen species (ROS) and mitogen‑activated protein kinases (MAPKs) using the well‑known antioxidants N‑acetyl cysteine (NAC) and propyl gallate (PG), as well as MAPK inhibitors. Treatment with 50 µM H2O2 inhibited the growth of the HPFs by ~45% in 24 h. H2O2 induced cell death via apoptosis and triggered the loss of mitochondrial membrane potential (MMP; ∆ψm) in the HPFs. H2O2 also increased the ROS levels, including O2•‑, in the HPFs and induced glutathione (GSH) depletion. NAC and PG attenuated the death of the HPFs and the loss of MMP (∆ψm) through the use of H2O2. NAC decreased the ROS levels in the H2O2‑treated HPFs and PG markedly prevented an increase in O2•‑ levels in these cells. However, PG alone induced cell death in the HPF control cells and increased the ROS levels in these cells. None of the MAPK (MEK, JNK and p38) inhibitors affected cell growth inhibition or cell death by H2O2. In addition, these inhibitors did not significantly affect the ROS levels and GSH depletion in the H2O2‑treated HPFs. In conclusion, H2O2 induced growth inhibition and cell death in the HPFs via GSH depletion. NAC and PG attenuated H2O2‑induced HPF cell death but each regulated the ROS levels in a different manner. Treatment with MAPK inhibitors did not affect cell death or the ROS levels in the H2O2‑treated HPFs.
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Copy and paste a formatted citation
Spandidos Publications style
Park WH: Effects of antioxidants and MAPK inhibitors on cell death and reactive oxygen species levels in H2O2‑treated human pulmonary fibroblasts. Oncol Lett 5: 1633-1638, 2013.
APA
Park, W.H. (2013). Effects of antioxidants and MAPK inhibitors on cell death and reactive oxygen species levels in H2O2‑treated human pulmonary fibroblasts. Oncology Letters, 5, 1633-1638. https://doi.org/10.3892/ol.2013.1216
MLA
Park, W. H."Effects of antioxidants and MAPK inhibitors on cell death and reactive oxygen species levels in H2O2‑treated human pulmonary fibroblasts". Oncology Letters 5.5 (2013): 1633-1638.
Chicago
Park, W. H."Effects of antioxidants and MAPK inhibitors on cell death and reactive oxygen species levels in H2O2‑treated human pulmonary fibroblasts". Oncology Letters 5, no. 5 (2013): 1633-1638. https://doi.org/10.3892/ol.2013.1216
Copy and paste a formatted citation
x
Spandidos Publications style
Park WH: Effects of antioxidants and MAPK inhibitors on cell death and reactive oxygen species levels in H2O2‑treated human pulmonary fibroblasts. Oncol Lett 5: 1633-1638, 2013.
APA
Park, W.H. (2013). Effects of antioxidants and MAPK inhibitors on cell death and reactive oxygen species levels in H2O2‑treated human pulmonary fibroblasts. Oncology Letters, 5, 1633-1638. https://doi.org/10.3892/ol.2013.1216
MLA
Park, W. H."Effects of antioxidants and MAPK inhibitors on cell death and reactive oxygen species levels in H2O2‑treated human pulmonary fibroblasts". Oncology Letters 5.5 (2013): 1633-1638.
Chicago
Park, W. H."Effects of antioxidants and MAPK inhibitors on cell death and reactive oxygen species levels in H2O2‑treated human pulmonary fibroblasts". Oncology Letters 5, no. 5 (2013): 1633-1638. https://doi.org/10.3892/ol.2013.1216
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