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Insulin Receptor Substrate 1 Is Involved in the Phycocyanin-Mediated Antineoplastic Function of Non-Small Cell Lung

Shuai Hao1, Qiancheng Li1, Yuanpu Liu1

  • 1Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing 100048, China.

Molecules (Basel, Switzerland)
|August 27, 2021
PubMed

Insights

Phycocyanin from marine algae inhibits non-small cell lung cancer (NSCLC) growth by reducing insulin receptor substrate 1 (IRS-1) and PI3K-AKT pathway activity. This reveals a new mechanism for targeting NSCLC.

Area of Science:

  • Marine natural products
  • Cancer biology
  • Molecular oncology

Background:

  • Phycocyanin from marine algae exhibits antineoplastic properties.
  • The mechanism of phycocyanin's anti-growth effect on non-small cell lung cancer (NSCLC) is not fully understood.
  • Investigating phycocyanin's action on NSCLC cell lines is crucial for therapeutic development.

Purpose of the Study:

  • To elucidate the molecular mechanism of phycocyanin's anti-proliferative effect on NSCLC cells.
  • To identify key signaling pathways involved in phycocyanin's action.
  • To explore the role of insulin receptor substrate 1 (IRS-1) in phycocyanin's anti-cancer activity.

Main Methods:

  • Treatment of NSCLC cell lines (H1299, A549, LTEP-a2) with phycocyanin.
  • Silencing of IRS-1 expression using siRNA.
  • Overexpression of IRS-1.
  • Assessment of cell proliferation, migration, colony formation, and apoptosis.
  • Analysis of PI3K-AKT pathway activity.

Main Results:

  • Phycocyanin treatment significantly reduced IRS-1 expression in NSCLC cells.
  • Knockdown of IRS-1 inhibited NSCLC cell growth, migration, and colony formation while promoting apoptosis.
  • Both phycocyanin and IRS-1 siRNA treatments suppressed PI3K-AKT pathway activity.
  • Overexpression of IRS-1 enhanced NSCLC cell proliferation, colony formation, and migration.

Conclusions:

  • Phycocyanin inhibits NSCLC cell growth through the IRS-1/AKT signaling pathway.
  • IRS-1 plays a critical role in regulating NSCLC cell behavior.
  • This study provides a mechanistic basis for phycocyanin as a potential therapeutic agent for NSCLC.
Keywords:
antineoplasticinsulin receptor substrate 1 (IRS-1)migrationnon-small cell lung cancer (NSCLC)phycocyaninproliferation

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