Superoxide dismutase 1 (SOD1) is a target for a small molecule identified in a screen for inhibitors of the growth of lung adenocarcinoma cell lines Academic Article uri icon


MeSH Major

  • Adenocarcinoma
  • Cell Division
  • Lung Neoplasms
  • Superoxide Dismutase


  • We previously described four small molecules that reduced the growth of lung adenocarcinoma cell lines with either epidermal growth factor receptor (EGFR) or KRAS mutations in a high-throughout chemical screen. By combining affinity proteomics and gene expression analysis, we now propose superoxide dismutase 1 (SOD1) as the most likely target of one of these small molecules, referred to as lung cancer screen 1 (LCS-1). siRNAs against SOD1 slowed the growth of LCS-1 sensitive cell lines; conversely, expression of a SOD1 cDNA increased proliferation of H358 cells and reduced sensitivity of these cells to LCS-1. In addition, SOD1 enzymatic activity was inhibited in vitro by LCS-1 and two closely related analogs. These results suggest that SOD1 is an LCS-1-binding protein that may act in concert with mutant proteins, such as EGFR and KRAS, to promote cell growth, providing a therapeutic target for compounds like LCS-1.

publication date

  • September 27, 2011



  • Academic Article



  • eng

PubMed Central ID

  • PMC3182729

Digital Object Identifier (DOI)

  • 10.1073/pnas.1113554108

PubMed ID

  • 21930909

Additional Document Info

start page

  • 16375

end page

  • 80


  • 108


  • 39