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Genetic markings could spot cancer before it develops
Date:9/30/2013

Unique DNA markings on certain genes may "predict" the risk of developing head and neck cancer, according to new research led by Queen Mary University of London.

The findings, published today in the journal Cancer, raise the potential for the development of non-invasive tests which could pick up these tell-tale signs of early cancer initiation.

Head and neck cancers are cancers that develop anywhere in the head and neck, including mouth cancer and throat cancer. About 16,000 people in the UK are diagnosed with head and neck cancer every year*.

In this study scientists analysed clinical specimens of malignant tissue from 93 cancer patients from Norway and the UK. These were compared with either tissue donated by healthy individuals undergoing wisdom tooth extractions, or with non-cancerous tissue from the same patients.

They were trying to identify whether there were any epigenetic changes in the cancerous cells which were not seen in the healthy cells. Epigenetics is the study of changes in gene expression caused by mechanisms other than changes in the underlying DNA sequence.

Not all genes are active all the time and there are many ways that gene expression is controlled. DNA methylation marks act as 'switches', either turning genes on or off. Abnormal DNA methylation is known to precede cancer initiation.

Lead researcher Dr Muy Teck-Teh, from the Institute of Dentistry at Queen Mary, said: "In this study we have identified four genes which were either over or under-expressed in head and neck cancer. The expression of these genes was inversely correlated with particular DNA methylation marks, suggesting the genes are epigenetically modified in these cancers.

"These epigenetic markers could be clinically exploited as biomarkers for early pre-cancer screening of head and neck cancer. However, further work is needed, as we are purely at the discovery stage at the moment and have not used this as a d
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Contact: Bridget Dempsey
press@qmul.ac.uk
020-788-27943
Queen Mary, University of London
Source:Eurekalert

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