Over-regulation of microRNA-133b inhibits cell proliferation of cisplatin-induced non-small cell lung cancer cells through PI3K/Akt and JAK2/STAT3 signaling pathway by targeting EGFR

Oncol Rep. 2018 Mar;39(3):1227-1234. doi: 10.3892/or.2018.6215. Epub 2018 Jan 15.

Abstract

The present study determined the anticancer activity and its mechanism of microRNA‑133b on cell proliferation of cisplatin-induced non-small cell lung cancer cells. The expression of microRNA-133b cisplatin‑induced non-small cell lung cancer (NSCLC) tissue was lower than that of para-carcinoma tissue in patients. Overall survival of higher expression in cisplatin-induced NSCLC patients was higher than that of lower expression in cisplatin‑induced NSCLC patients. Over-regulation of microRNA-133b inhibited cell proliferation and LDH activity, induced apoptosis and caspase-3 activity, suppressed the protein expression of EGFR, PI3K, p-Akt, p-JAK2 and p-STAT3, decreased cyclin D1 and increased Bax protein expression in cisplatin‑induced A549 cells. EGFR inhibitor (lapatinib) suppressed EGFR protein expression, inhibited cell proliferation and LDH activity, and induced apoptosis and caspase-3 activity in cisplatin-induced A549 cells by over-regulation of microRNA-133b. When EGFR protein expression was suppressed, PI3K, p-Akt, p-JAK2 and p-STAT3, decreased cyclin D1 and increased Bax protein expression in cisplatin-induced A549 cells by over-regulation of microRNA-133b. Altogether, our results indicated that over-regulation of microRNA-133b inhibits cell proliferation of cisplatin-induced NSCLC by PI3K/Akt and JAK2/STAT3 signaling pathway by targeting EGFR.

MeSH terms

  • Antineoplastic Agents / pharmacology
  • Apoptosis / drug effects
  • Biomarkers, Tumor / genetics
  • Biomarkers, Tumor / metabolism
  • Carcinoma, Non-Small-Cell Lung / drug therapy
  • Carcinoma, Non-Small-Cell Lung / genetics
  • Carcinoma, Non-Small-Cell Lung / metabolism
  • Carcinoma, Non-Small-Cell Lung / pathology*
  • Cell Proliferation / drug effects*
  • Cisplatin / pharmacology*
  • Drug Resistance, Neoplasm / genetics*
  • ErbB Receptors / genetics
  • ErbB Receptors / metabolism
  • Gene Expression Regulation, Neoplastic / drug effects*
  • Humans
  • Janus Kinase 2 / genetics
  • Janus Kinase 2 / metabolism
  • Lung Neoplasms / drug therapy
  • Lung Neoplasms / genetics
  • Lung Neoplasms / metabolism
  • Lung Neoplasms / pathology*
  • MicroRNAs / genetics*
  • Phosphatidylinositol 3-Kinases / genetics
  • Phosphatidylinositol 3-Kinases / metabolism
  • Proto-Oncogene Proteins c-akt / genetics
  • Proto-Oncogene Proteins c-akt / metabolism
  • STAT3 Transcription Factor / genetics
  • STAT3 Transcription Factor / metabolism
  • Signal Transduction / drug effects
  • Tumor Cells, Cultured

Substances

  • Antineoplastic Agents
  • Biomarkers, Tumor
  • MIRN133 microRNA, human
  • MicroRNAs
  • STAT3 Transcription Factor
  • STAT3 protein, human
  • Phosphatidylinositol 3-Kinases
  • EGFR protein, human
  • ErbB Receptors
  • JAK2 protein, human
  • Janus Kinase 2
  • AKT1 protein, human
  • Proto-Oncogene Proteins c-akt
  • Cisplatin