Surgical resection of glioblastomas induces pleiotrophin-mediated self-renewal of glioblastoma stem cells in recurrent tumors.


Journal

Neuro-oncology
ISSN: 1523-5866
Titre abrégé: Neuro Oncol
Pays: England
ID NLM: 100887420

Informations de publication

Date de publication:
01 07 2022
Historique:
pubmed: 30 12 2021
medline: 8 7 2022
entrez: 29 12 2021
Statut: ppublish

Résumé

Glioblastomas are highly resistant to therapy, and virtually all patients experience tumor recurrence after standard-of-care treatment. Surgical tumor resection is a cornerstone in glioblastoma therapy, but its impact on cellular phenotypes in the local postsurgical microenvironment has yet to be fully elucidated. We developed a preclinical orthotopic xenograft tumor resection model in rats with integrated 18F-FET PET/CT imaging. Primary and recurrent tumors were subject to bulk and single-cell RNA sequencing. Differentially expressed genes and pathways were investigated and validated using tissue specimens from the xenograft model, 23 patients with matched primary/recurrent tumors, and a cohort including 190 glioblastoma patients. Functional investigations were performed in vitro with multiple patient-derived cell cultures. Tumor resection induced microglia/macrophage infiltration, angiogenesis as well as proliferation and upregulation of several stem cell-related genes in recurrent tumor cells. Expression changes of selected genes SOX2, POU3F2, OLIG2, and NOTCH1 were validated at the protein level in xenografts and early recurrent patient tumors. Single-cell transcriptomics revealed the presence of distinct phenotypic cell clusters in recurrent tumors which deviated from clusters found in primary tumors. Recurrent tumors expressed elevated levels of pleiotrophin (PTN), secreted by both tumor cells and tumor-associated microglia/macrophages. Mechanistically, PTN could induce tumor cell proliferation, self-renewal, and the stem cell program. In glioblastoma patients, high PTN expression was associated with poor overall survival and identified as an independent prognostic factor. Surgical tumor resection is an iatrogenic driver of PTN-mediated self-renewal in glioblastoma tumor cells that promotes therapeutic resistance and tumor recurrence.

Sections du résumé

BACKGROUND
Glioblastomas are highly resistant to therapy, and virtually all patients experience tumor recurrence after standard-of-care treatment. Surgical tumor resection is a cornerstone in glioblastoma therapy, but its impact on cellular phenotypes in the local postsurgical microenvironment has yet to be fully elucidated.
METHODS
We developed a preclinical orthotopic xenograft tumor resection model in rats with integrated 18F-FET PET/CT imaging. Primary and recurrent tumors were subject to bulk and single-cell RNA sequencing. Differentially expressed genes and pathways were investigated and validated using tissue specimens from the xenograft model, 23 patients with matched primary/recurrent tumors, and a cohort including 190 glioblastoma patients. Functional investigations were performed in vitro with multiple patient-derived cell cultures.
RESULTS
Tumor resection induced microglia/macrophage infiltration, angiogenesis as well as proliferation and upregulation of several stem cell-related genes in recurrent tumor cells. Expression changes of selected genes SOX2, POU3F2, OLIG2, and NOTCH1 were validated at the protein level in xenografts and early recurrent patient tumors. Single-cell transcriptomics revealed the presence of distinct phenotypic cell clusters in recurrent tumors which deviated from clusters found in primary tumors. Recurrent tumors expressed elevated levels of pleiotrophin (PTN), secreted by both tumor cells and tumor-associated microglia/macrophages. Mechanistically, PTN could induce tumor cell proliferation, self-renewal, and the stem cell program. In glioblastoma patients, high PTN expression was associated with poor overall survival and identified as an independent prognostic factor.
CONCLUSION
Surgical tumor resection is an iatrogenic driver of PTN-mediated self-renewal in glioblastoma tumor cells that promotes therapeutic resistance and tumor recurrence.

Identifiants

pubmed: 34964899
pii: 6489042
doi: 10.1093/neuonc/noab302
pmc: PMC9248408
doi:

Substances chimiques

Carrier Proteins 0
Cytokines 0
pleiotrophin 134034-50-7

Types de publication

Journal Article Research Support, Non-U.S. Gov't

Langues

eng

Sous-ensembles de citation

IM

Pagination

1074-1087

Commentaires et corrections

Type : CommentIn

Informations de copyright

© The Author(s) 2021. Published by Oxford University Press on behalf of the Society for Neuro-Oncology.

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Auteurs

Arnon Møldrup Knudsen (AM)

Department of Clinical Research, University of Southern Denmark, Odense, Denmark.
Department of Pathology, Odense University Hospital, Odense, Denmark.

Bo Halle (B)

Department of Clinical Research, University of Southern Denmark, Odense, Denmark.
Department of Neurosurgery, Odense University Hospital, Odense, Denmark.

Oriane Cédile (O)

Hematology-Pathology Research Laboratory, Research Unit for Hematology and Research Unit for Pathology, University of Southern Denmark and Odense University Hospital, Odense, Denmark.

Mark Burton (M)

Department of Clinical Genetics, Odense University Hospital, Odense, Denmark.
Clinical Genome Center, University of Southern Denmark & Region of Southern Denmark, Odense, Denmark.

Christina Baun (C)

Department of Nuclear Medicine, Odense University Hospital, Odense, Denmark.
Danish Molecular Biomedical Imaging Center (DaMBIC), University of Southern Denmark, Odense, Denmark.

Helge Thisgaard (H)

Department of Clinical Research, University of Southern Denmark, Odense, Denmark.
Department of Nuclear Medicine, Odense University Hospital, Odense, Denmark.

Atul Anand (A)

Department of Clinical Research, University of Southern Denmark, Odense, Denmark.
Department of Pathology, Odense University Hospital, Odense, Denmark.

Christopher Hubert (C)

Department of Biomedical Engineering, Cleveland Clinic Lerner Research Institute, Cleveland, Ohio, USA.
Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, Ohio, USA.
Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio, USA.

Mads Thomassen (M)

Department of Clinical Research, University of Southern Denmark, Odense, Denmark.
Department of Clinical Genetics, Odense University Hospital, Odense, Denmark.
Clinical Genome Center, University of Southern Denmark & Region of Southern Denmark, Odense, Denmark.

Signe Regner Michaelsen (SR)

Department of Pathology, Bartholin Institute, Copenhagen University Hospital, Copenhagen, Denmark.

Birgitte Brinkmann Olsen (BB)

Department of Clinical Research, University of Southern Denmark, Odense, Denmark.
Department of Nuclear Medicine, Odense University Hospital, Odense, Denmark.

Rikke Hedegaard Dahlrot (RH)

Department of Clinical Research, University of Southern Denmark, Odense, Denmark.
Department of Oncology, Odense University Hospital, Odense, Denmark.

Rolf Bjerkvig (R)

Department of Biomedicine, University of Bergen, Bergen, Norway.
NORLUX Neuro-Oncology Laboratory, Department of Oncology, Luxembourg Institute of Health, Strassen, Luxembourg.

Justin Durla Lathia (JD)

Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, Ohio, USA.
Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio, USA.
Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio, USA.
Rose Ella Burkhardt Brain Tumor and Neuro-Oncology Center, Cleveland Clinic, Cleveland, Ohio, USA.

Bjarne Winther Kristensen (BW)

Department of Clinical Research, University of Southern Denmark, Odense, Denmark.
Department of Pathology, Odense University Hospital, Odense, Denmark.
Department of Pathology, Bartholin Institute, Copenhagen University Hospital, Copenhagen, Denmark.
Department of Clinical Medicine and Biotech Research & Innovation Centre (BRIC), University of Copenhagen, Copenhagen, Denmark.

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