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(MRC CASE) Liquid biopsies to support management of Ewing sarcomas

Faculty of Biology, Medicine and Health

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Prof C Dive , Dr M McCabe , Dr D Rothwell No more applications being accepted Competition Funded PhD Project (Students Worldwide)

About the Project

Ewing sarcoma (ES) is a primary bone and soft tissue cancer of children and young adults driven by oncogenic gene fusions including EWSR1/FLI1 and EWSR1/ERG. Small pilot studies demonstrated that circulating tumour nucleic acids (ctDNA and ctRNA) are detectable in patient plasma at diagnosis. ctDNA correlates with tumour volume and is more abundant at recurrence. ctRNA has theoretical advantages over ctDNA as a circulating biomarker being restricted to a smaller genetic footprint with less inter-patient variability and greater abundance per tumour cell. However, ctRNA is less well studied. This project, a collaboration between the CRUK Manchester Institute’s Cancer Biomarker Centre (CBC), University of Manchester and ThermoFisher will explore the potential utility of EWSR1/FLI1 and related fusion transcript ctRNAs circulating in plasma as biomarkers of response and progression in ES.
The CBC Nucleic Acids Biomarkers Team (>20 staff) with established expertise in the development and validation of nucleic acid based liquid biopsy assays with host this student.
The project will involve:
(i) evaluation and optimisation for ctRNA in plasma of an existing commercial assay, Thermofisher’s Oncomine Childhood NGS panel that reliably detects ES fusion transcripts in tumour tissue, using their Ion Torrent platform;
(ii) detection of ES fusions in serial clinical samples using this assay from a pilot cohort of standard and high risk Manchester ES patients at diagnosis and recurrence to evaluate the assay’s clinical utility;
(iii) quantification of ctRNA fusions at baseline from patients recruited to two international ES trials: EE2012 and rEECur, and correlation of transcript abundance with established clinical risk factors;
(iv) investigation of the biology of ctRNA in ES including exploration of how ctRNA is shed into the blood, specifically whether it is transported as cargo in extracellular vesicles or as free ctRNA, and
(v) analysis of the phenotypic and functional effects on non-neoplastic cells of exposure to free or vesicle-bound ES cell-derived EWSR1/FLI1.
The unique fusion genes that define ES make an attractive approach for serial liquid biopsies to monitor response to chemotherapy and screen for asymptomatic disease relapse prior to the development of clinical symptoms, and may predict outcome. This collaborative project, led from the clinic by Dr McCabe, uses state-of-the-art and scalable technologies with potential for rapid clinical adoption. The supervisory team, through its links with the EuroEwing Consortium, is ideally placed to translate pre-clinical research into clinical research and drive a step change in clinical ES management.

Entry Requirements:
Applicants must have obtained, or be about to obtain, at least an upper second class honours degree (or equivalent) in a relevant subject.

UK applicants interested in this project should make direct contact with the Primary Supervisor to arrange to discuss the project further as soon as possible. International applicants (including EU nationals) must ensure they meet the academic eligibility criteria (including English Language) as outlined before contacting potential supervisors to express an interest in their project. Eligibility can be checked via the University Country Specific information page ( .
If your country is not listed you must contact the Doctoral Academy Admissions Team providing a detailed CV (to include academic qualifications – stating degree classification(s) and dates awarded) and relevant transcripts.
Following the review of your qualifications and with support from potential supervisor(s), you will be informed whether you can submit a formal online application.
To be considered for this project you MUST submit a formal online application form - full details on how to apply can be found on the MRC Doctoral Training Partnership (DTP) website

Equality, diversity and inclusion is fundamental to the success of The University of Manchester, and is at the heart of all of our activities. The full Equality, diversity and inclusion statement can be found on the website

Funding Notes

This is a CASE studentship in partnership with Thermo Fisher. Funding will cover UK tuition fees/stipend only. The University of Manchester aims to support the most outstanding applicants from outside the UK. We are able to offer a limited number of bursaries that will enable full studentships to be awarded to international applicants. These full studentships will only be awarded to exceptional quality candidates, due to the competitive nature of this scheme.
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