The Olfactory Bulb Provides a Radioresistant Niche for Glioblastoma Cells.
Journal
International journal of radiation oncology, biology, physics
ISSN: 1879-355X
Titre abrégé: Int J Radiat Oncol Biol Phys
Pays: United States
ID NLM: 7603616
Informations de publication
Date de publication:
01 05 2020
01 05 2020
Historique:
received:
24
10
2019
revised:
10
01
2020
accepted:
13
01
2020
pubmed:
29
1
2020
medline:
6
10
2020
entrez:
29
1
2020
Statut:
ppublish
Résumé
The various microenvironments that exist within the brain combined with the invasive nature of glioblastoma (GBM) creates the potential for a topographic influence on tumor cell radiosensitivity. The aim of this study was to determine whether specific brain microenvironments differentially influence tumor cell radioresponse. GBM stem-like cells were implanted into the right striatum of nude mice. To measure radiosensitivity, proliferation status of individual tumor cells was determined according to the incorporation of 5-chloro-2'-deoxyuridine delivered at 4, 12, and 20 days after brain irradiation. As an additional measure of radiosensitivity, the percentage of human cells in the right hemisphere and the olfactory bulb were defined using digital droplet polymerase chain reaction. Targeted gene expression profiling was accomplished using NanoString analysis. Tumor cells were detected throughout the striatum, corpus callosum, and olfactory bulb. After an initial loss of proliferating tumor cells in the corpus callosum and striatum after irradiation, there was only a minor recovery by 20 days. In contrast, the proliferation of tumor cells located in the olfactory bulb began to recover at 4 days and returned to unirradiated levels by day 12 postirradiation. The percentage of human cells in the right hemisphere and the olfactory bulb after irradiation also suggested that the tumor cells in the olfactory bulb were relatively radioresistant. Gene expression profiling identified consistent differences between tumor cells residing in the olfactory bulb and those in the right hemisphere. These results suggest that the olfactory bulb provides a radioresistant niche for GBM cells.
Identifiants
pubmed: 31987963
pii: S0360-3016(20)30066-3
doi: 10.1016/j.ijrobp.2020.01.007
pmc: PMC7152565
mid: NIHMS1552019
pii:
doi:
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, N.I.H., Intramural
Langues
eng
Sous-ensembles de citation
IM
Pagination
194-201Subventions
Organisme : CCR NIH HHS
ID : HHSN261200800001C
Pays : United States
Organisme : NCI NIH HHS
ID : HHSN261200800001E
Pays : United States
Organisme : Intramural NIH HHS
ID : ZIA BC011372
Pays : United States
Informations de copyright
Published by Elsevier Inc.
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