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Enhancement of Apoptotic and Autophagic Induction by a Novel Synthetic C-1 Analogue of 7-deoxypancratistatin in Human Breast Adenocarcinoma and Neuroblastoma Cells with Tamoxifen
19:44

Enhancement of Apoptotic and Autophagic Induction by a Novel Synthetic C-1 Analogue of 7-deoxypancratistatin in Human Breast Adenocarcinoma and Neuroblastoma Cells with Tamoxifen

Published on: May 30, 2012

Mechanisms of tamoxifen-induced apoptosis

S Mandlekar1, A N Kong

  • 1Department of Drug Metabolism and Pharmacokinetics, DuPont Pharmaceuticals Company, Newark, DE 19711, USA. sandhya.mandlekar@dupontpharma.com

Apoptosis : an International Journal on Programmed Cell Death
|October 12, 2001
PubMed

Insights

Tamoxifen (TAM) effectively treats breast cancer by inducing apoptosis. Beyond estrogen receptor (ER) inhibition, TAM utilizes non-ER pathways involving caspases, MAPKs, and oxidative stress for its anti-cancer effects.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Biology

Background:

  • Tamoxifen (TAM) is a widely used breast cancer therapeutic.
  • Its efficacy is linked to growth arrest and apoptosis induction in cancer cells.
  • While primarily acting via estrogen receptor (ER) inhibition, non-ER mechanisms are increasingly recognized.

Purpose of the Study:

  • To review the diverse signaling pathways involved in Tamoxifen-induced apoptosis.
  • To highlight both ER-dependent and ER-independent mechanisms of TAM action.
  • To consolidate current understanding of TAM's molecular effects on breast cancer cells.

Main Methods:

  • Literature review of studies on Tamoxifen's mechanism of action.
  • Analysis of research investigating signaling proteins modulated by TAM.
  • Examination of studies exploring oxidative stress and mitochondrial pathways in TAM response.

Main Results:

  • TAM induces apoptosis through ER-dependent and independent pathways.
  • Key signaling proteins modulated by TAM include PKC, TGFbeta, c-myc, caspases, and MAPKs (JNK, p38).
  • Oxidative stress, MPT, ceramide, and cell membrane fluidity changes contribute to TAM-induced apoptosis.

Conclusions:

  • Tamoxifen's anti-cancer effects are multifaceted, involving complex intracellular signaling networks.
  • Understanding these diverse pathways is crucial for optimizing breast cancer treatment strategies.
  • Further research into non-ER-mediated mechanisms may reveal novel therapeutic targets.

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