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ERK1/2 activation is required for resveratrol-induced apoptosis in MDA-MB-231 cells

Thanh-Hung Nguyen1, Fatimah B Mustafa, Shazib Pervaiz

  • 1Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117456.

International Journal of Oncology
|June 26, 2008
PubMed

Insights

Resveratrol (RSVL) induces apoptosis in aggressive breast cancer cells by activating ERK1/2 signaling. This pathway is crucial for RSVL

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Cancer Research

Background:

  • Resveratrol (RSVL), a natural compound from grapes, exhibits anti-cancer properties, including antiproliferative effects against breast cancer.
  • The precise molecular mechanisms underlying Resveratrol's anti-cancer activity, particularly in aggressive breast cancer subtypes, remain incompletely understood.

Purpose of the Study:

  • To elucidate the specific molecular pathways through which Resveratrol induces apoptosis in the highly invasive MDA-MB-231 breast cancer cell line.
  • To investigate the role of mitogen-activated protein kinase (MAPK) signaling pathways, specifically ERK1/2, in Resveratrol-mediated apoptosis.

Main Methods:

  • Treatment of MDA-MB-231 cells with Resveratrol (RSVL).
  • Assessment of apoptosis markers: caspase-3 cleavage, PARP cleavage, and DNA fragmentation.
  • Analysis of ERK1/2, Bcl-2, p38, and JNK signaling pathway activation using inhibitors and siRNA.
  • Overexpression of MEK1 to study its effect on RSVL-induced apoptosis.

Main Results:

  • Resveratrol (RSVL) treatment induced significant growth inhibition and apoptosis in MDA-MB-231 cells.
  • RSVL-induced apoptosis was dependent on caspase activation and involved sustained ERK1/2 activation and Bcl-2 suppression.
  • Inhibition of ERK1/2 reversed RSVL's effects, while MEK1 overexpression enhanced RSVL-induced apoptosis, confirming ERK1/2's central role upstream of caspase-3.

Conclusions:

  • Resveratrol (RSVL) triggers apoptosis in invasive breast cancer cells via a pathway requiring ERK1/2 activation.
  • The ERK1/2 pathway plays a critical role in mediating Resveratrol's anti-cancer effects by regulating apoptosis and Bcl-2 expression.
  • These findings highlight the potential of Resveratrol as a therapeutic agent and underscore the importance of the ERK1/2 pathway in breast cancer treatment strategies.

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