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In Vivo Model for Testing Effect of Hypoxia on Tumor Metastasis
12:03

In Vivo Model for Testing Effect of Hypoxia on Tumor Metastasis

Published on: December 9, 2016

Influence of hypoxia on TRAIL-induced apoptosis in tumor cells

Martin Weinmann1, Patrizia Marini, Verena Jendrossek

  • 1Department of Radiation Oncology, University of Tübingen, Hoppe-Seylerstrasse 3, 72076 Tübingen, Germany.

International Journal of Radiation Oncology, Biology, Physics
|January 31, 2004
PubMed
Abstract

Insights

Tumor hypoxia does not impede the effectiveness of Tumor Necrosis Factor-Related Apoptosis-Inducing Ligand (TRAIL) therapy. TRAIL remains a promising antineoplastic tool even in hypoxic tumor environments.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Tumor hypoxia is a known factor that diminishes the effectiveness of various cancer treatments, including radiotherapy and chemotherapy.
  • Tumor Necrosis Factor-Related Apoptosis-Inducing Ligand (TRAIL) is a promising antineoplastic agent due to its selective toxicity towards tumor cells.

Purpose of the Study:

  • To investigate the impact of tumor hypoxia on the efficacy of TRAIL-induced apoptosis.
  • To compare the effects of hypoxia on TRAIL-induced apoptosis versus radiation-induced apoptosis.

Main Methods:

  • In vitro evaluation of apoptosis induction and growth rates of tumor cell lines under hypoxic conditions.
  • Verification of hypoxia by measuring hypoxia-inducible factor-1 (HIF-1) activation.
  • Assessment of the influence of Bcl-2 expression on TRAIL-induced apoptosis under varying oxygen levels.

Main Results:

  • Moderate hypoxia activated HIF-1 but did not cause growth retardation or apoptosis.
  • Hypoxia reduced radiation-induced apoptosis but did not significantly affect TRAIL-induced apoptosis across tested cell lines.
  • Hypoxia did not alter Bcl-2 expression, and Bcl-2 had a minimal impact on TRAIL efficacy.

Conclusions:

  • TRAIL demonstrates clear efficacy in inducing apoptosis even under confirmed hypoxic conditions.
  • TRAIL represents a viable therapeutic option for tumors characterized by hypoxia.

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