Cited by 235Glioma Diagnosis and TreatmentCancer Genomics and DiagnosticsGastrointestinal Tumor Research and Treatment

Novel Oncogenic PDGFRA Mutations in Pediatric High-Grade Gliomas

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Paugh, Barbara S., Zhu, Xiaoyan, Qu, Chunxu, Endersby, Raelene, Diaz, Alexander K., Zhang, Junyuan, Bax, Dorine A., Carvalho, Diana +8 more·2013·Cancer Research

Published version of a preprint

Abstract

The outcome for children with high-grade gliomas (HGG) remains dismal, with a 2-year survival rate of only 10% to 30%. Diffuse intrinsic pontine glioma (DIPG) comprise a subset of HGG that arise in the brainstem almost exclusively in children. Genome-wide analyses of copy number imbalances previously showed that platelet-derived growth factor receptor α (PDGFRA) is the most frequent target of focal amplification in pediatric HGGs, including DIPGs. To determine whether PDGFRA is also targeted by more subtle mutations missed by copy number analysis, we sequenced all PDGFRA coding exons from a cohort of pediatric HGGs. Somatic-activating mutations were identified in 14.4% (13 of 90) of nonbrainstem pediatric HGGs and 4.7% (2 of 43) of DIPGs, including missense mutations and in-frame deletions and insertions not previously described. Forty percent of tumors with mutation showed concurrent amplification, whereas 60% carried heterozygous mutations. Six different mutations impacting different domains all resulted in ligand-independent receptor activation that was blocked by small molecule inhibitors of PDGFR. Expression of mutants in p53-null primary mouse astrocytes conferred a proliferative advantage in vitro and generated HGGs in vivo with complete penetrance when implanted into brain. The gene expression signatures of these murine HGGs reflected the spectrum of human diffuse HGGs. PDGFRA intragenic deletion of exons 8 and 9 were previously shown in adult HGG, but were not detected in 83 nonbrainstem pediatric HGG and 57 DIPGs. Thus, a distinct spectrum of mutations confers constitutive receptor activation and oncogenic activity to PDGFRα in childhood HGG.

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Authors
Paugh, B. S., Zhu, X., Qu, C., Endersby, R., Diaz, A. K., Zhang, J., Bax, D. A., Carvalho, D., Reis, R. M., Onar-Thomas, A., Broniscer, A., Wetmore, C., Zhang, J., Jones, C., Ellison, D. W., & Baker, S. J.
Affiliations
  • St. Jude Children's Research Hospital (US)
  • Authors' Affiliations: Departments of 1Developmental Neurobiology, 2Computational Biology, 3Biostatistics, 4Oncology, and 5Pathology, St. Jude Children's Research Hospital; 6Interdisciplinary Biomedical Science Program, University of Tennessee Health Sciences Center, Memphis, Tennessee; 7Telethon Institute for Child Health Research, Centre for Child Health Research, The University of Western Australia, Perth, Australia; 8Divisions of Molecular Pathology and Cancer Therapeutics, The Institute of Cancer Research, London, United Kingdom; and 9Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, São Paulo, Brazil
Corresponding author
Baker, Suzanne J.
Venue
Cancer Research
Published
2013-10-14
Volume
73
Issue
20
Pages
6219-6229
ISSN
  • 0008-5472 (ISSN-L)
  • 1538-7445
OpenAlex
W2124839835
Cited by
235
References
58
Citations by year
2026: 9 · 2025: 14 · 2024: 17 · 2023: 14 · 2022: 23 · 2021: 25 · 2020: 14 · 2019: 14 · 2018: 22 · 2017: 26 · 2016: 17 · 2015: 14 · 2014: 23 · 2013: 3
FWCI
9.34
Type
journal article
Language
en
Open access
Locations
  • Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • UWA Profiles and Research Repository (UWA) (submittedVersion)
Funders
  • V Foundation for Cancer Research
  • Cure Starts Now Foundation
  • American Lebanese Syrian Associated Charities
  • Arog Pharmaceuticals
  • Brain Tumour Charity
  • National Institutes of Health
  • National Cancer Institute (R01CA135554, P01CA096832, P30CA021765)
Topics
  • Health Sciences › Medicine › Genetics › Glioma Diagnosis and Treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer Genomics and Diagnostics
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal Tumor Research and Treatment
Keywords
PDGFRA mutation, pediatric high-grade glioma, diffuse intrinsic pontine glioma, somatic activating mutations, ligand-independent receptor activation, PDGFR inhibitors, oncogenic receptor tyrosine kinase, exon deletion, brainstem glioma
MeSH terms
Adolescent, Animals, Brain Neoplasms, Child, Child, Preschool, Glioma, Humans, Mutation, Receptor, Platelet-Derived Growth Factor alpha, Gene Expression Profiling, Mice, Genome-Wide Association Study

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