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Clinical and Translational Oncology

, Volume 18, Issue 8, pp 825–830 | Cite as

Aldehyde dehydrogenase isoform 1 (ALDH1) expression as a predictor of radiosensitivity in laryngeal cancer

  • M. MartínEmail author
  • A. Hinojar
  • L. Cerezo
  • J. García
  • M. Lopez
  • J. Prada
  • A. Marín
  • C. Gamallo
Research Article

Abstract

Background

Aldehyde dehydrogenase isoform 1 (ALDH1) has been shown to be a marker of cancer stem cells (CSCs). These stem cells may be responsible for tumour perpetuation as well as local and distant invasion. Several studies have shown that CSCs are more chemoradiotherapy (CRT)-resistant and may be responsible for tumour recurrence. Other studies, in contrast, have found ALDH1 expression to be indicative of a better prognosis.

Methods

We retrospectively evaluated 84 patients diagnosed and treated for laryngeal cancer between 2006 and 2011. All patients underwent curative-intent radiotherapy or CRT at our institution. 57 of the 84 tumour samples contained sufficient material for ALDH1 assessment.

Results

ALDH1 expression was detected in 17.5 % (10/57) of the tissue samples. None of the tumours from stage I patients tested positive for ALDH1. The relapse rate in ALDH1 + patients was 10 versus 51.2 % for ALDH1−. No differences in overall survival were observed between the groups; however, disease-free survival was 90 % for the ALDH1 + group versus 48.9 % for ALDH1− patients (p = 0.034).

Conclusion

The patients in this study with ALDH1 + tumours had better outcomes than their counterparts with ALDH1− tumours. This finding suggests that not all CSCs are resistant to conventional cancer treatments. It may also imply that new methods of correctly identifying these cells are needed.

Keywords

Aldehyde dehydrogenase Cancer stem cells Larynx carcinoma Radiotherapy 

Notes

Acknowledgments

This work was supported by Grant from the Fundación Mutua Madrileña (no. MUT02.2011). We wish to thank Mr Bradley Londres for his assistance in editing and improving the manuscript.

Conflict of interest

The authors have declared that not conflict of interest exists.

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

For this type of study, formal consent is not required.

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Copyright information

© Federación de Sociedades Españolas de Oncología (FESEO) 2015

Authors and Affiliations

  • M. Martín
    • 1
    Email author
  • A. Hinojar
    • 2
  • L. Cerezo
    • 1
  • J. García
    • 3
  • M. Lopez
    • 1
  • J. Prada
    • 2
  • A. Marín
    • 1
  • C. Gamallo
    • 4
  1. 1.Department of Radiation OncologyInstituto de Investigación Hospital de La PrincesaMadridSpain
  2. 2.Department of OtorhinolaryngologyInstituto de Investigación Hospital de La PrincesaMadridSpain
  3. 3.Department of OtorhinolaryngologyHospital Universitario Infanta SofíaMadridSpain
  4. 4.Department of PathologyInstituto de Investigación Hospital de La PrincesaMadridSpain

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