Synergistic Antitumor Activity of SH003 and Docetaxel via EGFR Signaling Inhibition in Non-Small Cell Lung Cancer

Mi-So Jeong1, Kang-Wook Lee2, Yu-Jeong Choi1

  • 1Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea.

Insights

The herbal mixture SH003 combined with docetaxel (DTX) effectively induces apoptosis and suppresses tumor growth in non-small-cell lung cancer (NSCLC) by inhibiting EGFR and STAT3 pathways.

Area of Science:

  • Oncology
  • Pharmacology
  • Molecular Biology

Background:

  • Epidermal growth factor receptor (EGFR) overexpression is common in lung cancer, leading to inevitable recurrence and metastasis despite tyrosine kinase inhibitor treatments.
  • Docetaxel (DTX) is a conventional chemotherapy agent, and its combination with traditional herbal medicines is being explored to enhance lung cancer treatment efficacy.
  • SH003, a novel herbal mixture, has demonstrated anticancer properties in various cancer types.

Purpose of the Study:

  • To investigate the combined apoptotic and anticancer effects of SH003 and DTX in human non-small-cell lung cancer (NSCLC).
  • To elucidate the molecular mechanisms underlying the synergistic effects of SH003 and DTX, focusing on key signaling pathways.

Main Methods:

  • In vitro studies using NSCLC cell lines (H460) to assess apoptosis induction and signaling pathway modulation.
  • In vivo studies using H460 tumor xenograft models in mice to evaluate tumor growth inhibition and molecular marker expression.

Main Results:

  • The combination of SH003 and DTX significantly induced apoptotic cell death in NSCLC cells, evidenced by increased cleaved caspases and cleaved poly (ADP-ribose) polymerase.
  • SH003 and DTX suppressed EGFR and signal transducer and activator of transcription 3 (STAT3) signaling pathways, leading to apoptosis in H460 cells.
  • In vivo, SH003 and DTX combination therapy effectively inhibited tumor growth, increased apoptotic markers, and decreased phosphorylated EGFR (p-EGFR) and phosphorylated STAT3 (p-STAT3) levels.

Conclusions:

  • The combination of SH003 and DTX exhibits potent anticancer effects in NSCLC through the induction of apoptosis and suppression of EGFR/STAT3 signaling.
  • This herbal-chemotherapy combination represents a promising novel therapeutic strategy to overcome challenges in conventional lung cancer treatment.
  • Further research into SH003 and DTX combination therapy could lead to improved outcomes for lung cancer patients.