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Radioresistance in oral squamous cell carcinoma

Murphy, Justin Thomas


Justin Thomas Murphy


Lynn Cawkwell


Head and Neck Squamous Cell Carcinoma (HNSCC) is the sixth most common cancer accounting for approximately 6% of all cancers worldwide. However the distribution across the globe varies considerably. The majority of small tumours of the oral cavity and upper aerodigestive tract, in the absence of metastatic disease, can be successfully treated with surgery or radiotherapy. Despite this most small tumours of the oral cavity are now treated with surgery as the primary treatment modality with radiotherapy being reserved for adjuvant therapy, palliation or in patients unfit for surgery. Radiotherapy is also used in cases where there is doubt about the completeness of resection and where adverse histological characteristics are present.

Unfortunately, on average about 10% of tumours treated in this way are resistant to radiotherapy, developing tumour recurrence within the original radiotherapy field during the ensuing 12 months. Patients with radioresistant tumours are not only receiving a therapy that is unnecessary but are also being put at risk of potentially serious complications, e.g. osteoradionecrosis of the cervical spine. The primary aim of this thesis was to investigate the mechanism of radioresistance and create an in vitro model of a radioresistant oral squamous cell carcinoma. The methods of cell culture, microarray analysis and immunohistochemistry were employed to this end. Two novel radioresistant cell lines, PE-CAPJ41RR and PE-CAPJ49RR, were created and a number of targets identified using microarray analysis. Immunohistochemistry was used to investigate the relationship EGFR, Bcl-2, BAX and COX-2 had with radiotherapy response.


Murphy, J. T. (2008). Radioresistance in oral squamous cell carcinoma. (Thesis). University of Hull. Retrieved from

Thesis Type Thesis
Deposit Date Aug 16, 2011
Publicly Available Date Feb 22, 2023
Keywords Medicine
Public URL
Additional Information Postgraduate Medical Institute, The University of Hull
Award Date Jan 1, 2008


Thesis (2.2 Mb)

Copyright Statement
© 2008 Murphy, Justin Thomas. All rights reserved. No part of this publication may be reproduced without the written permission of the copyright holder.

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