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A Novel High-resolution In vivo Imaging Technique to Study the Dynamic Response of Intracranial Structures to Tumor Growth and Therapeutics
12:09

A Novel High-resolution In vivo Imaging Technique to Study the Dynamic Response of Intracranial Structures to Tumor Growth and Therapeutics

Published on: June 16, 2013

Drug-radiation interactions in tumor blood vessels

D E Hallahan1, A Y Chen, M Teng

  • 1Department of Biomedical Engineering, Vanderbilt University Medical Center, Nashville, Tennessee, USA.

Oncology (Williston Park, N.Y.)
|November 7, 1999
PubMed

Insights

Tumor blood vessel destruction aids tumor regression. Combining antiangiogenic drugs with radiation therapy enhances this effect by targeting the tumor endothelium, potentially overcoming treatment resistance.

Area of Science:

  • Oncology
  • Vascular Biology
  • Radiation Oncology

Background:

  • Tumor vasculature obliteration is crucial for tumor regression.
  • Antiangiogenic agents are emerging in cancer clinical trials.
  • Ionizing radiation induces inflammation and a procoagulative state in tumor blood vessels.

Purpose of the Study:

  • To explore the interactions between antiangiogenic agents and ionizing radiation.
  • To investigate the role of the vascular endothelium in combined treatment efficacy.
  • To understand mechanisms that may prevent resistance to cancer therapies.

Main Methods:

  • Review of mechanisms of interaction between antiangiogenic agents and ionizing radiation.
  • Analysis of endothelial responses to radiation, including oxidative injury and inflammatory cascade.
  • Examination of how biological response modifiers affect irradiated tumor vasculature.

Main Results:

  • Radiation induces endothelial oxidative injury, promoting procoagulative and inflammatory responses.
  • Concurrent administration of proinflammatory and prothrombotic agents with radiation can cause vascular obliteration and tumor necrosis.
  • Interactions may occur at the vascular endothelium level, potentially mitigating resistance.

Conclusions:

  • The vascular endothelium is a key target for combined antiangiogenic and radiation therapies.
  • Targeting endothelial responses may offer a strategy to enhance tumor regression and overcome resistance.
  • Future clinical trial designs should incorporate the impact of radiation on the vascular endothelium.

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