Title |
Longitudinal analysis of treatment-induced genomic alterations in gliomas
|
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Published in |
Genome Medicine, February 2017
|
DOI | 10.1186/s13073-017-0401-9 |
Pubmed ID | |
Authors |
E. Zeynep Erson-Omay, Octavian Henegariu, S. Bülent Omay, Akdes Serin Harmancı, Mark W. Youngblood, Ketu Mishra-Gorur, Jie Li, Koray Özduman, Geneive Carrión-Grant, Victoria E. Clark, Caner Çağlar, Mehmet Bakırcıoğlu, M. Necmettin Pamir, Viviane Tabar, Alexander O. Vortmeyer, Kaya Bilguvar, Katsuhito Yasuno, Lisa M. DeAngelis, Joachim M. Baehring, Jennifer Moliterno, Murat Günel |
Abstract |
Glioblastoma multiforme (GBM) constitutes nearly half of all malignant brain tumors and has a median survival of 15 months. The standard treatment for these lesions includes maximal resection, radiotherapy, and chemotherapy; however, individual tumors display immense variability in their response to these approaches. Genomic techniques such as whole-exome sequencing (WES) provide an opportunity to understand the molecular basis of this variability. Here, we report WES-guided treatment of a patient with a primary GBM and two subsequent recurrences, demonstrating the dynamic nature of treatment-induced molecular changes and their implications for clinical decision-making. We also analyze the Yale-Glioma cohort, composed of 110 whole exome- or whole genome-sequenced tumor-normal pairs, to assess the frequency of genomic events found in the presented case. Our longitudinal analysis revealed how the genomic profile evolved under the pressure of therapy. Specifically targeted approaches eradicated treatment-sensitive clones while enriching for resistant ones, generated due to chromothripsis, which we show to be a frequent event in GBMs based on our extended analysis of 110 gliomas in the Yale-Glioma cohort. Despite chromothripsis and the later acquired mismatch-repair deficiency, genomics-guided personalized treatment extended survival to over 5 years. Interestingly, the case displayed a favorable response to immune checkpoint inhibition after acquiring mismatch repair deficiency. Our study demonstrates the importance of longitudinal genomic profiling to adjust to the dynamic nature of treatment-induced molecular changes to improve the outcomes of precision therapies. |
X Demographics
Geographical breakdown
Country | Count | As % |
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United States | 6 | 30% |
United Kingdom | 4 | 20% |
Germany | 1 | 5% |
Saudi Arabia | 1 | 5% |
Canada | 1 | 5% |
Montenegro | 1 | 5% |
Russia | 1 | 5% |
Australia | 1 | 5% |
Unknown | 4 | 20% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Scientists | 13 | 65% |
Members of the public | 5 | 25% |
Science communicators (journalists, bloggers, editors) | 1 | 5% |
Practitioners (doctors, other healthcare professionals) | 1 | 5% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
United Kingdom | 1 | 1% |
Unknown | 66 | 99% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Ph. D. Student | 11 | 16% |
Researcher | 10 | 15% |
Student > Bachelor | 8 | 12% |
Other | 6 | 9% |
Professor | 5 | 7% |
Other | 9 | 13% |
Unknown | 18 | 27% |
Readers by discipline | Count | As % |
---|---|---|
Medicine and Dentistry | 18 | 27% |
Agricultural and Biological Sciences | 8 | 12% |
Biochemistry, Genetics and Molecular Biology | 7 | 10% |
Neuroscience | 5 | 7% |
Nursing and Health Professions | 3 | 4% |
Other | 4 | 6% |
Unknown | 22 | 33% |