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Identification of Intracellular Signaling Events Induced in Viable Cells by Interaction with Neighboring Cells Undergoing Apoptotic Cell Death
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Published on: December 27, 2016

Apoptosis induced by lycorine in KM3 cells is associated with the G0/G1 cell cycle arrest

Yan Li1, Jing Liu, Li-Jun Tang

  • 1Molecular Biology Research Center, School of Biological Science and Technology, Central South University, Hunan 410078, P.R. China.

Oncology Reports
|January 5, 2007
PubMed

Insights

Lycorine, a natural anti-tumor compound, effectively inhibits human multiple myeloma (KM3) cell proliferation. It induces apoptosis and arrests the cell cycle, offering potential therapeutic strategies.

Area of Science:

  • Natural Products Chemistry
  • Molecular Biology
  • Cancer Research

Background:

  • Lycorine is a bioactive alkaloid derived from Amaryllidaceae plants.
  • It exhibits known biological activities against various malignant cells.

Purpose of the Study:

  • To investigate the anti-cancer effects of lycorine on the human multiple myeloma cell line KM3.
  • To elucidate the underlying mechanisms of lycorine-induced cell death and cell cycle arrest.

Main Methods:

  • MTT assay to assess cell viability and proliferation.
  • Flow cytometry to detect apoptosis and cell cycle distribution.
  • Western blot analysis to examine key proteins involved in apoptosis and cell cycle regulation.

Main Results:

  • Lycorine demonstrated significant inhibitory activity against KM3 cells, reducing their growth rates.
  • Apoptosis was induced, evidenced by morphological changes, DNA fragmentation, and a sub-G1 peak.
  • Lycorine triggered the mitochondrial and death receptor pathways, involving cytochrome c release and caspase activation.
  • The cell cycle was arrested at the G0/G1 phase, associated with decreased cyclin D1 and CDK4 expression.

Conclusions:

  • Lycorine effectively suppresses proliferation and enhances apoptosis in human multiple myeloma cells.
  • Mechanisms include cell cycle arrest at G0/G1 and activation of intrinsic and extrinsic apoptotic pathways.
  • Lycorine shows promise as a potential therapeutic agent for multiple myeloma.

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