Multiomic Approach to Radioresistance of Ependymomas in Children and Adolescents

Treatment of childhood ependymoma, the second most frequent pediatric brain tumor, is based on surgery and radiation therapy. However, 50% relapse, mainly locally. Progress in imaging, molecular biology and radiotherapy ballistics has led us to propose the EPENDYMOMICS project, a multi-omics approach using artificial intelligence to detect the predictive characteristics of relapse, and to define innovative radiotherapy targets using multimodal imaging. We previously reported that the relapse sites are mainly located in the high-dose radiotherapy zone and that there appear to be prognostic factors for relapse based on anatomical and functional MRI abnormalities by diffusion and perfusion. In addition, recent studies in molecular biology have identified significant prognostic factors. The challenge now is to use and correlate all these findings in larger cohorts to tackle the radio-resistance of this disease. Our objective is to collate in a single database called NETSPARE (Network to Structure and Share Pediatric data to Accelerate Research on Ependymoma) the clinical, histological, biological, imaging and radiotherapy data from two consecutive studies that included 370 children and adolescents with ependymoma since 2000 in France. The EPENDYMOMICS project will comprise a clinical research team, three imaging research teams, two histopathology teams, and a biostatistics team working on NETSPARE. Our goal is to obtain a radiogenomic signature of our data, which will be validated with the English external cohort of 200 patients that is currently being analyzed. The perspective is to optimize the indications and volumes of irradiation that could in the future be used in a European translational research trial to tackle radioresistance.

Sex

All

Maximum age

25 Years

Inclusion Criteria:

* children with intracranial ependymoma
* treated
* included in PEPPI study, pediaRT or in SIOP II Ependymoma french program

Exclusion Criteria:

* NA

• BACKGROUNDTensaouti F, Ducassou A, Chaltiel L, Bolle S, Muracciole X, Coche-Dequeant B, Alapetite C, Bernier V, Claude L, Supiot S, Huchet A, Kerr C, le Prise E, Laprie A; radiotherapy committee of the French Society for Childhood Cancer (SFCE). Patterns of failure after radiotherapy for pediatric patients with intracranial ependymoma. Radiother Oncol. 2017 Mar;122(3):362-367. doi: 10.1016/j.radonc.2016.12.025. Epub 2017 Jan 12. PMID 28089483
• BACKGROUNDDucassou A, Padovani L, Chaltiel L, Bolle S, Habrand JL, Claude L, Carrie C, Muracciole X, Coche-Dequeant B, Alapetite C, Supiot S, Demoor-Goldschmidt C, Bernier-Chastagner V, Huchet A, Leseur J, Le Prise E, Kerr C, Truc G, Nguyen TD, Bertozzi AI, Frappaz D, Boetto S, Sevely A, Tensaouti F, Laprie A; Pediatric French Radiation Oncologist Group (GFRP) and the French Society of Children With Cancer (SFCE). Pediatric Localized Intracranial Ependymomas: A Multicenter Analysis of the Societe Francaise de lutte contre les Cancers de l'Enfant (SFCE) from 2000 to 2013. Int J Radiat Oncol Biol Phys. 2018 Sep 1;102(1):166-173. doi: 10.1016/j.ijrobp.2018.05.036. Epub 2018 May 24. PMID 30102193
• BACKGROUNDTensaouti F, Ducassou A, Chaltiel L, Sevely A, Bolle S, Muracciole X, Coche-Dequant B, Alapetite C, Supiot S, Huchet A, Bernier V, Claude L, Bertozzi-Salamon AI, Liceaga S, Lotterie JA, Peran P, Payoux P, Laprie A; radiotherapy committee of the French Society for Childhood Cancer (SFCE). Prognostic and predictive values of diffusion and perfusion MRI in paediatric intracranial ependymomas in a large national study. Br J Radiol. 2016 Oct;89(1066):20160537. doi: 10.1259/bjr.20160537. Epub 2016 Aug 23. PMID 27550423
• BACKGROUNDTensaouti F, Ducassou A, Chaltiel L, Sevely A, Bolle S, Padovani L, Jouin A, Alapetite C, Supiot S, Huchet A, Bernier V, Claude L, Kerr C, Le Prise E, Bertozzi-Salamon AI, Liceaga S, Lotterie JA, Peran P, Laprie A; French Society for Childhood Cancer (SFCE). Imaging biomarkers of outcome after radiotherapy for pediatric ependymoma. Radiother Oncol. 2018 Apr;127(1):103-107. doi: 10.1016/j.radonc.2018.02.008. Epub 2018 Mar 2. PMID 29500084
• Tensaouti F, Ducassou A, Chaltiel L, Bolle S, Habrand JL, Alapetite C, Coche-Dequeant B, Bernier V, Claude L, Carrie C, Padovani L, Muracciole X, Supiot S, Huchet A, Leseur J, Kerr C, Hangard G, Lisbona A, Goudjil F, Ferrand R, Laprie A. Feasibility of Dose Escalation in Patients With Intracranial Pediatric Ependymoma. Front Oncol. 2019 Jun 21;9:531. doi: 10.3389/fonc.2019.00531. eCollection 2019.