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Start Over Author "Johnson, Kevin C." Publisher american association for cancer research
10 results on '"Johnson, Kevin C."'

1. The epigenetic evolution of glioma is determined by the IDH1 mutation status and treatment regimen

Author

Malta, Tathiane M; https://orcid.org/0000-0003-1129-5791, Sabedot, Thais S; https://orcid.org/0000-0002-7813-483X, Morosini, Natalia S; https://orcid.org/0000-0002-9294-9461, Datta, Indrani; https://orcid.org/0000-0001-7548-9881, Garofano, Luciano; https://orcid.org/0000-0001-8582-0865, Vallentgoed, Wies R; https://orcid.org/0000-0001-6373-7710, Varn, Frederick S; https://orcid.org/0000-0001-6307-016X, Aldape, Kenneth; https://orcid.org/0000-0001-5119-7550, D'Angelo, Fulvio; https://orcid.org/0000-0002-4940-4693, Bakas, Spyridon; https://orcid.org/0000-0001-8734-6482, Barnholtz-Sloan, Jill S; https://orcid.org/0000-0001-6190-9304, Gan, Hui K; https://orcid.org/0000-0001-7319-8546, Hasanain, Mohammad; https://orcid.org/0000-0001-5207-101X, Hau, Ann-Christin; https://orcid.org/0000-0002-4412-2355, Johnson, Kevin C; https://orcid.org/0000-0003-0016-5158, Cazacu, Simona; https://orcid.org/0000-0002-6085-4177, deCarvalho, Ana C; https://orcid.org/0000-0003-1183-4548, Khasraw, Mustafa; https://orcid.org/0000-0003-3249-9849, Kocakavuk, Emre; https://orcid.org/0000-0003-1920-0494, Kouwenhoven, Mathilde C M; https://orcid.org/0000-0001-5252-4365, Migliozzi, Simona; https://orcid.org/0000-0002-4870-8943, Niclou, Simone P; https://orcid.org/0000-0002-3417-9534, Niers, Johanna M; https://orcid.org/0000-0002-0366-8247, Ormond, D Ryan; https://orcid.org/0000-0001-7027-2915, Paek, Sun Ha; https://orcid.org/0000-0003-3007-8653, Reifenberger, Guido; https://orcid.org/0000-0002-1419-9837, Sillevis Smitt, Peter A; https://orcid.org/0000-0001-8044-6798, Smits, Marion; https://orcid.org/0000-0001-5563-2871, Weiss, Tobias; https://orcid.org/0000-0002-5533-9429, Weller, Michael; https://orcid.org/0000-0002-1748-174X, et al, Malta, Tathiane M; https://orcid.org/0000-0003-1129-5791, Sabedot, Thais S; https://orcid.org/0000-0002-7813-483X, Morosini, Natalia S; https://orcid.org/0000-0002-9294-9461, Datta, Indrani; https://orcid.org/0000-0001-7548-9881, Garofano, Luciano; https://orcid.org/0000-0001-8582-0865, Vallentgoed, Wies R; https://orcid.org/0000-0001-6373-7710, Varn, Frederick S; https://orcid.org/0000-0001-6307-016X, Aldape, Kenneth; https://orcid.org/0000-0001-5119-7550, D'Angelo, Fulvio; https://orcid.org/0000-0002-4940-4693, Bakas, Spyridon; https://orcid.org/0000-0001-8734-6482, Barnholtz-Sloan, Jill S; https://orcid.org/0000-0001-6190-9304, Gan, Hui K; https://orcid.org/0000-0001-7319-8546, Hasanain, Mohammad; https://orcid.org/0000-0001-5207-101X, Hau, Ann-Christin; https://orcid.org/0000-0002-4412-2355, Johnson, Kevin C; https://orcid.org/0000-0003-0016-5158, Cazacu, Simona; https://orcid.org/0000-0002-6085-4177, deCarvalho, Ana C; https://orcid.org/0000-0003-1183-4548, Khasraw, Mustafa; https://orcid.org/0000-0003-3249-9849, Kocakavuk, Emre; https://orcid.org/0000-0003-1920-0494, Kouwenhoven, Mathilde C M; https://orcid.org/0000-0001-5252-4365, Migliozzi, Simona; https://orcid.org/0000-0002-4870-8943, Niclou, Simone P; https://orcid.org/0000-0002-3417-9534, Niers, Johanna M; https://orcid.org/0000-0002-0366-8247, Ormond, D Ryan; https://orcid.org/0000-0001-7027-2915, Paek, Sun Ha; https://orcid.org/0000-0003-3007-8653, Reifenberger, Guido; https://orcid.org/0000-0002-1419-9837, Sillevis Smitt, Peter A; https://orcid.org/0000-0001-8044-6798, Smits, Marion; https://orcid.org/0000-0001-5563-2871, Weiss, Tobias; https://orcid.org/0000-0002-5533-9429, Weller, Michael; https://orcid.org/0000-0002-1748-174X, and et al

Abstract

Tumor adaptation or selection is thought to underlie therapy resistance in glioma. To investigate longitudinal epigenetic evolution of gliomas in response to therapeutic pressure, we performed an epigenomic analysis of 132 matched initial and recurrent tumors from patients with IDH-wildtype (IDHwt) and IDH-mutant (IDHmut) glioma. IDHwt gliomas showed a stable epigenome over time with relatively low levels of global methylation. The epigenome of IDHmut gliomas showed initial high levels of genome-wide DNA methylation that was progressively reduced to levels similar to those of IDHwt tumors. Integration of epigenomics, gene expression, and functional genomics identified HOXD13 as a master regulator of IDHmut astrocytoma evolution. Furthermore, relapse of IDHmut tumors was accompanied by histological progression that was associated with survival, as validated in an independent cohort. Finally, the initial cell composition of the tumor microenvironment varied between IDHwt and IDHmut tumors and changed differentially following treatment, suggesting increased neo-angiogenesis and T-cell infiltration upon treatment of IDHmut gliomas. This study provides one of the largest cohorts of paired longitudinal glioma samples with epigenomic, transcriptomic, and genomic profiling and suggests that treatment of IDHmut glioma is associated with epigenomic evolution towards an IDHwt-like phenotype.

Published
2024

2. Abstract 3147: Stereotactic image-guided epigenome profiling reveals a neural stem cell evolutionary origin of diffuse gliomas

Author

Barthel, Floris P., primary, Verburg, Niels, additional, Rockne, Russell, additional, Eijgelaar, Roelant, additional, Anderson, Kevin, additional, Müller, Domenique, additional, Branciamore, Sergio, additional, Johnson, Kevin C., additional, Wesseling, Pieter, additional, Hamer, Philip C. de Witt, additional, and Verhaak, Roel G., additional

Published
2021
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3. Abstract 2084: Single-cell multimodal glioma analyses reveal epigenetic regulators of cellular plasticity and environmental stress response

Author

Johnson, Kevin C., primary, Anderson, Kevin J., additional, Courtois, Elise T., additional, Gujar, Amit D., additional, Barthel, Floris P., additional, Varn, Frederick S., additional, Luo, Diane, additional, Seignon, Martine, additional, Yi, Eunhee, additional, Kim, Hoon, additional, Estecio, Marcos R., additional, Tang, Ming, additional, Navin, Nicholas E., additional, Maurya, Rahul, additional, Ngan, Chew Yee, additional, Verburg, Niels, additional, Hamer, Philip C. De Witt, additional, Bulsara, Ketan, additional, Samuels, Michael L., additional, Das, Sunit, additional, Robson, Paul, additional, and Verhaak, Roel G., additional

Published
2021
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7. Abstract 1176: Genomic profiling of canine glioma: Comparative analyses with respect to drivers of human glioma

Author

Amin, Samirkumar B., primary, Martinez-Ledesma, Juan Emmanuel, additional, Boudreau, Beth, additional, Kim, Hoon, additional, Johnson, Kevin C., additional, Dickinson, Peter V., additional, Packer, Rebecca, additional, Taylor, Amanda R., additional, Rossmeisl, John H., additional, Heimberger, Amy, additional, Levine, Jonathan, additional, and Verhaak, Roel, additional

Published
2018
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9. The Epigenetic Evolution of Glioma Is Determined by the IDH1 Mutation Status and Treatment Regimen.

Author

Malta TM, Sabedot TS, Morosini NS, Datta I, Garofano L, Vallentgoed W, Varn FS, Aldape K, D'Angelo F, Bakas S, Barnholtz-Sloan JS, Gan HK, Hasanain M, Hau AC, Johnson KC, Cazacu S, deCarvalho AC, Khasraw M, Kocakavuk E, Kouwenhoven MCM, Migliozzi S, Niclou SP, Niers JM, Ormond DR, Paek SH, Reifenberger G, Sillevis Smitt PA, Smits M, Stead LF, van den Bent MJ, Van Meir EG, Walenkamp A, Weiss T, Weller M, Westerman BA, Ylstra B, Wesseling P, Lasorella A, French PJ, Poisson LM, Verhaak RGW, Iavarone A, and Noushmehr H

Subjects
Humans, Epigenesis, Genetic, Epigenomics, Mutation, Neoplasm Recurrence, Local genetics, Tumor Microenvironment, Brain Neoplasms pathology, Glioma pathology, Isocitrate Dehydrogenase genetics, Isocitrate Dehydrogenase metabolism
Abstract

Tumor adaptation or selection is thought to underlie therapy resistance in glioma. To investigate longitudinal epigenetic evolution of gliomas in response to therapeutic pressure, we performed an epigenomic analysis of 132 matched initial and recurrent tumors from patients with IDH-wildtype (IDHwt) and IDH-mutant (IDHmut) glioma. IDHwt gliomas showed a stable epigenome over time with relatively low levels of global methylation. The epigenome of IDHmut gliomas showed initial high levels of genome-wide DNA methylation that was progressively reduced to levels similar to those of IDHwt tumors. Integration of epigenomics, gene expression, and functional genomics identified HOXD13 as a master regulator of IDHmut astrocytoma evolution. Furthermore, relapse of IDHmut tumors was accompanied by histologic progression that was associated with survival, as validated in an independent cohort. Finally, the initial cell composition of the tumor microenvironment varied between IDHwt and IDHmut tumors and changed differentially following treatment, suggesting increased neoangiogenesis and T-cell infiltration upon treatment of IDHmut gliomas. This study provides one of the largest cohorts of paired longitudinal glioma samples with epigenomic, transcriptomic, and genomic profiling and suggests that treatment of IDHmut glioma is associated with epigenomic evolution toward an IDHwt-like phenotype., Significance: Standard treatments are related to loss of DNA methylation in IDHmut glioma, resulting in epigenetic activation of genes associated with tumor progression and alterations in the microenvironment that resemble treatment-naïve IDHwt glioma., (©2023 The Authors; Published by the American Association for Cancer Research.)

Published
2024
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10. Live-Cell Imaging Shows Uneven Segregation of Extrachromosomal DNA Elements and Transcriptionally Active Extrachromosomal DNA Hubs in Cancer.

Author

Yi E, Gujar AD, Guthrie M, Kim H, Zhao D, Johnson KC, Amin SB, Costa ML, Yu Q, Das S, Jillette N, Clow PA, Cheng AW, and Verhaak RGW

Subjects
Humans, DNA genetics, Extrachromosomal Inheritance, Gene Amplification, Neoplasms genetics, Tumor Microenvironment
Abstract

Oncogenic extrachromosomal DNA elements (ecDNA) play an important role in tumor evolution, but our understanding of ecDNA biology is limited. We determined the distribution of single-cell ecDNA copy number across patient tissues and cell line models and observed how cell-to-cell ecDNA frequency varies greatly. The exceptional intratumoral heterogeneity of ecDNA suggested ecDNA-specific replication and propagation mechanisms. To evaluate the transfer of ecDNA genetic material from parental to offspring cells during mitosis, we established the CRISPR-based ecTag method. ecTag leverages ecDNA-specific breakpoint sequences to tag ecDNA with fluorescent markers in living cells. Applying ecTag during mitosis revealed disjointed ecDNA inheritance patterns, enabling rapid ecDNA accumulation in individual cells. After mitosis, ecDNAs clustered into ecDNA hubs, and ecDNA hubs colocalized with RNA polymerase II, promoting transcription of cargo oncogenes. Our observations provide direct evidence for uneven segregation of ecDNA and shed new light on mechanisms through which ecDNAs contribute to oncogenesis. SIGNIFICANCE: ecDNAs are vehicles for oncogene amplification. The circular nature of ecDNA affords unique properties, such as mobility and ecDNA-specific replication and segregation behavior. We uncovered fundamental ecDNA properties by tracking ecDNAs in live cells, highlighting uneven and random segregation and ecDNA hubs that drive cargo gene transcription. See related commentary by Henssen, p. 293 . This article is highlighted in the In This Issue feature, p. 275 ., (©2021 American Association for Cancer Research.)

Published
2022
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