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  • American Association for Cancer Research (AACR)  (2)
  • Jones, David T. W.  (2)
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  • American Association for Cancer Research (AACR)  (2)
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  • 1
    In: Cancer Research, American Association for Cancer Research (AACR), Vol. 72, No. 8_Supplement ( 2012-04-15), p. 1432-1432
    Abstract: Brain tumors are the most common cause of cancer-related death in childhood. Ependymomas, are the third most common pediatric brain tumor. The disease remains incurable for about 45% of patients even after gross total resection and radiotherapy. Despite showing a very homogeneous histological picture, ependymomas display distinct molecular behavior, which supports the existence of several independent entities of the disease. We examined two non-overlapping cohorts of 102 and 75 ependymomas by mRNA expression profiling, on two different array platforms (Affymetrix, Agilent). When performing multiple statistical clustering methods (unsupervised consensus NMF and consensus HCL), we could consistently identify three major clusters, including two subgroups of posterior fossa (PF) ependymoma, a variant common in children and associated with heterogeneous clinical outcome. Subgroup-specific chromosome aberrations of PF tumors were detected by aCGH, and biological signaling pathways distinguishing PF subgroups were identified by gene set enrichment analysis and visualized in Cytoscape. We validated the most significantly classifying markers of each subgroup by immunohistochemistry on a tissue microarray containing an independent set of 265 PF ependymomas. Our findings delineate two subgroups of PF ependymoma (groups A and B) which are demographically, transcriptionally, genetically, and clinically distinct. Group A patients are younger, have laterally located tumors with a balanced genome, more frequently develop secondary metastases and are much more likely to have an extremely poor outcome as compared with group B patients. Based on a multi-variate Cox proportional-hazards model, our identified markers have the strongest independent prognostic value among demographic and molecular variables with Hazard ratios of 8.45 (PFS) and 10.55 (OS). Prognostic significance and predictive impact is being validated in the GPOH HIT2000 Ependymoma study. The identification of two distinct subgroups of PF ependymoma, and markers applicable for their clinical distinction, will allow for better prognostication of individual cases, independent of age, level of resection and WHO grade, and also for stratification in future ependymoma clinical trials. Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 103rd Annual Meeting of the American Association for Cancer Research; 2012 Mar 31-Apr 4; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2012;72(8 Suppl):Abstract nr 1432. doi:1538-7445.AM2012-1432
    Type of Medium: Online Resource
    ISSN: 0008-5472 , 1538-7445
    RVK:
    RVK:
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2012
    detail.hit.zdb_id: 2036785-5
    detail.hit.zdb_id: 1432-1
    detail.hit.zdb_id: 410466-3
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    In: Cancer Research, American Association for Cancer Research (AACR), Vol. 78, No. 19_Supplement ( 2018-10-01), p. IA11-IA11
    Abstract: The treatment of relapses from high-risk entities remains a major clinical challenge, thus the desperate need for precision medicine approaches. To serve this need, we have developed the INFORM registry study (INdividualized therapy FOr Relapsed Malignancies in Childhood), which attempts to rapidly generate personalized tumor profiles and identify therapeutic targets in a clinical diagnostic environment for relapse patients. The INFORM study assesses the feasibility of integrating rapid molecular profiling in the clinical management of pediatric cancer patients with progressive or relapsed high-risk malignancies. Whole-exome and low-coverage whole-genome sequencing are being performed on tumor and normal DNA, complemented with matched tumor RNA sequencing (Illumina HiSeq4000), DNA methylation profiling, and gene expression profiling (for outlier gene expression). To date, more than 400 patients were enrolled from & gt;50 centers in seven different countries (Germany, The Netherlands, Switzerland, Austria, Sweden, Finland, and Australia). The average turnaround time from tissue arrival to molecular results is 3 weeks. Actionable targets with at least “borderline” evidence (according to a prioritization score harmonized with the other major pediatric precision oncology programs across Europe) are being identified in ~50% of patients. Based on these findings, several patients were recruited onto ongoing clinical trials, or targeted therapeutics and/or patient-specific peptide vaccines were incorporated into individualized treatment regimes, with first reports of marked responses. Furthermore, we have established a systematic workflow for the reporting of hereditary predisposition, which is detected in ~7% of cases. In 2018, we will start recruiting patients onto several target-defined (entity independent) subtrials of the INFORM2 interventional trial series as well as the complementary counterpart conducted in France, the eSMART trial, which will collectively provide a portfolio of ~10 mechanism-of-action defined, investigator-initiated early phase clinical (combination) trials for pediatric patients at relapse within the European Innovative Therapies for Children with Cancer (ITCC) Consortium. Citation Format: David T. W. Jones, Barbara C.Worst, Elke Pfaff, Cornelis M. Van Tilburg, Gnana Prakash Balasubramanian, Petra Fiesel, Kristian W. Pajtler, Angelika Freitag, Ruth Witt, Andreas E. Kulozik, Felix Sahm, Andreas von Deimling, Angelika Eggert, Uta Dirksen, Peter Lichter, David Capper, Olaf Witt, Stefan M. Pfister. Pediatric precision oncology programs in Germany and Europe [abstract]. In: Proceedings of the AACR Special Conference: Pediatric Cancer Research: From Basic Science to the Clinic; 2017 Dec 3-6; Atlanta, Georgia. Philadelphia (PA): AACR; Cancer Res 2018;78(19 Suppl):Abstract nr IA11.
    Type of Medium: Online Resource
    ISSN: 0008-5472 , 1538-7445
    RVK:
    RVK:
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2018
    detail.hit.zdb_id: 2036785-5
    detail.hit.zdb_id: 1432-1
    detail.hit.zdb_id: 410466-3
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
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