Glioblastoma stem-like cells dynamically transition between a chemoradiation-resistant state and a chemoradiation-sensitive state. However, physical barriers in the tumour microenvironment restrict the delivery of chemotherapy to tumour compartments that are distant from blood vessels. Here, we show that a massively parallel computational model of the spatiotemporal dynamics of the perivascular niche that incorporates glioblastoma stem-like cells and differentiated tumour cells as well as relevant tissue-level phenomena can be used to optimize the administration schedules of concurrent radiation and temozolomide—the standard-of-care treatment for glioblastoma. In mice with platelet-derived growth factor (PDGF)-driven glioblastoma, the model-optimized treatment schedule increased the survival of the animals. For standard radiation fractionation in patients, the model predicts that chemotherapy may be optimally administered about one hour before radiation treatment. Computational models of the spatiotemporal dynamics of the tumour microenvironment could be used to predict tumour responses to a broader range of treatments and to optimize treatment regimens.
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The main data supporting the results in this study are available within the paper and its Supplementary Information. The raw and analysed datasets generated during the study are too large to be publicly shared, yet they are available for research purposes from the corresponding authors on reasonable request.
The custom code used in this study is available at GitHub (https://github.com/arandles/chemoradiation) under the BSD-3-Clause open-source license.
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We acknowledge feedback and advice from members of the Michor laboratory, and D. Puleri for figure editing. We also acknowledge support from the Dana-Farber Physical Sciences Oncology Center (NIH U54CA193461, to F.M. and E.C.H.), the NIH Office of the Director (NIH, DP5OD019876, to A.R.), and the Lawrence Livermore National Laboratory Lawrence Fellowship (to A.R.). The mouse work was supported by P30 CA015704 at the Fred Hutchinson Cancer Research Center. This work was performed under the auspices of the US Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. Computing support for this work was provided by the Lawrence Livermore National Laboratory Institutional Computing Grand Challenges. F.M. acknowledges support from the Ludwig Center at Harvard.
The authors declare no competing interests.
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Randles, A., Wirsching, HG., Dean, J.A. et al. Computational modelling of perivascular-niche dynamics for the optimization of treatment schedules for glioblastoma. Nat Biomed Eng 5, 346–359 (2021). https://doi.org/10.1038/s41551-021-00710-3