Skip to main content

Targeting Tumor Hypoxia

  • Chapter
  • First Online:
Molecular Targeted Radiosensitizers

Abstract

Hypoxia (oxygen levels below 1–2%) is a common finding in solid tumors. The development of tumor hypoxia can be viewed as an imbalance between oxygen supply and demand. Tumor hypoxia significantly impacts tumor radiosensitivity and subsequently leads to poor clinical outcomes in patients treated with radiation therapy. The presence of molecular oxygen supports the production of lethal DNA damage in irradiated cells; therefore, the radiation dose required under severely hypoxic conditions to achieve a certain biological effect is generally 2- to 3-fold higher than the dose needed under normoxic conditions (i.e., oxygen enhancement ratio (OER) = 2–3). Several therapeutic approaches have been historically used and are emerging to target tumor hypoxia in order to improve radiation therapy outcomes. These include hyperbaric oxygen, correction of anemia, combination of radiation with carbogen and nicotinamide (ARCON), oxygen mimetics such as nimorazole, hypoxia-activated prodrugs, vascular normalization strategies (reviewed in Chap. 12), and emerging therapies to target tumor oxidative phosphorylation. Even though tumor hypoxia has long been established as a negative factor for radiation therapy outcomes in the clinic, we still lack robust, widely available, and adequately validated biomarkers for assessing tumor hypoxia in patients. This has not only significantly impeded the investigation of the efficacy of hypoxia modifiers, but it has also resulted in an inability to accurately select patients who are likely to benefit from such treatment. It is likely that only when hypoxia biomarkers are widely available will hypoxia modification enter the era of personalized medicine and improve outcomes.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Chapter
USD 29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD 129.00
Price excludes VAT (USA)
  • Available as EPUB and PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD 169.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info
Hardcover Book
USD 169.99
Price excludes VAT (USA)
  • Durable hardcover edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

References

Download references

Acknowledgments

MS gratefully acknowledges the support of the Howat Foundation. JDW is grateful for support from the Royal College of Radiologists, and Oriel College, Oxford.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Ester M. Hammond .

Editor information

Editors and Affiliations

Rights and permissions

Reprints and permissions

Copyright information

© 2020 Springer Nature Switzerland AG

About this chapter

Check for updates. Verify currency and authenticity via CrossMark

Cite this chapter

Skwarski, M., Bowler, E., Wilson, J.D., Higgins, G.S., Hammond, E.M. (2020). Targeting Tumor Hypoxia. In: Willers, H., Eke, I. (eds) Molecular Targeted Radiosensitizers. Cancer Drug Discovery and Development. Humana, Cham. https://doi.org/10.1007/978-3-030-49701-9_11

Download citation

  • DOI: https://doi.org/10.1007/978-3-030-49701-9_11

  • Published:

  • Publisher Name: Humana, Cham

  • Print ISBN: 978-3-030-49700-2

  • Online ISBN: 978-3-030-49701-9

  • eBook Packages: MedicineMedicine (R0)

Publish with us

Policies and ethics