[Angiogenesis inhibitors and radiation therapy: concept and preliminary results]

R Mazeron1, J Bourhis, E Deutsch

  • 1UPRES EA2710, laboratoire de radiosensibilité des tumeurs et des tissus sains, institut Gustave-Roussy, Villejuif, France.

Bulletin Du Cancer
|March 26, 2009
PubMed

Insights

Angiogenesis inhibitors show promise when combined with radiation therapy, potentially improving tumor sensitivity. Further clinical trials are needed to determine optimal use and safety for cancer treatment.

Area of Science:

  • Oncology
  • Cancer Biology
  • Pharmacology

Context:

  • Angiogenesis is vital for tumor growth and metastasis.
  • Several anti-angiogenic drugs are approved, but not for combination therapy.
  • Preclinical data suggest synergistic effects between inhibitors and radiation.

Purpose:

  • To explore the potential of combining angiogenesis inhibitors with radiation therapy.
  • To investigate the mechanisms behind the synergistic effect, such as modulation of tumor hypoxia.
  • To highlight the need for further clinical evaluation of this combination.

Summary:

  • Angiogenesis inhibitors are crucial in cancer therapy, yet their combination with radiation therapy remains underexplored clinically.
  • Preclinical studies indicate a synergistic effect, possibly due to transiently reduced tumor hypoxia, enhancing radiation sensitivity.
  • Ongoing Phase I and II trials aim to establish the safety, optimal dosing, and sequencing for this combination therapy.

Impact:

  • This research could lead to novel, more effective cancer treatment strategies.
  • Understanding the interplay between angiogenesis inhibitors and radiation may improve patient outcomes.
  • Successful clinical translation could expand therapeutic options for various cancers.

Related Concept Videos

Cancer Therapies02:49

Cancer Therapies

Cancer therapies are various modes of treatment, such as surgery, radiation therapy, and chemotherapy that are administered to cancer patients.
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...
Tumor Immunotherapy01:27

Tumor Immunotherapy

Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
Targeted Cancer Therapies02:57

Targeted Cancer Therapies

The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against specific...
Mechanism of Angiogenesis01:10

Mechanism of Angiogenesis

Blood vessel formation starts early during embryonic development, around day 7. In the extraembryonic yolk sac, mesodermal precursor cells called hemangioblast proliferate and differentiate into angioblast. Angioblasts express vascular endothelial growth factor receptor 2 or VEGFR2, which binds VEGF-A, a proangiogenic factor, guiding blood vessel formation. VEGF signaling promotes angioblasts to form a blood island in the developing embryo. Angioblasts further differentiate, giving rise to...
Regulation of Angiogenesis and Blood Supply01:24

Regulation of Angiogenesis and Blood Supply

Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits.  Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl hydroxylase and factor...