Table of Contents
Journal of Biomarkers
Volume 2015 (2015), Article ID 981458, 16 pages
http://dx.doi.org/10.1155/2015/981458
Review Article

Current Challenges in Volatile Organic Compounds Analysis as Potential Biomarkers of Cancer

Biomedical Science Research Centre, School of Environment and Life Sciences, University of Salford, Manchester M5 4WT, UK

Received 25 September 2014; Accepted 10 March 2015

Academic Editor: Ranju Ralhan

Copyright © 2015 Kamila Schmidt and Ian Podmore. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

An early diagnosis and appropriate treatment are crucial in reducing mortality among people suffering from cancer. There is a lack of characteristic early clinical symptoms in most forms of cancer, which highlights the importance of investigating new methods for its early detection. One of the most promising methods is the analysis of volatile organic compounds (VOCs). VOCs are a diverse group of carbon-based chemicals that are present in exhaled breath and biofluids and may be collected from the headspace of these matrices. Different patterns of VOCs have been correlated with various diseases, cancer among them. Studies have also shown that cancer cells in vitro produce or consume specific VOCs that can serve as potential biomarkers that differentiate them from noncancerous cells. This review identifies the current challenges in the investigation of VOCs as potential cancer biomarkers, by the critical evaluation of available matrices for the in vivo and in vitro approaches in this field and by comparison of the main extraction and detection techniques that have been applied to date in this area of study. It also summarises complementary in vivo, ex vivo, and in vitro studies conducted to date in order to try to identify volatile biomarkers of cancer.