Radiotherapy induces persistent innate immune reprogramming of microglia into a primed state.
CP: Cancer
CP: Immunology
brain tumor
innate immune memory
microglia
microglial priming
neuroinflammation
radiotherapy
Journal
Cell reports
ISSN: 2211-1247
Titre abrégé: Cell Rep
Pays: United States
ID NLM: 101573691
Informations de publication
Date de publication:
14 Feb 2024
14 Feb 2024
Historique:
received:
16
05
2023
revised:
06
12
2023
accepted:
25
01
2024
medline:
15
2
2024
pubmed:
15
2
2024
entrez:
15
2
2024
Statut:
aheadofprint
Résumé
Over half of patients with brain tumors experience debilitating and often progressive cognitive decline after radiotherapy treatment. Microglia, the resident macrophages in the brain, have been implicated in this decline. In response to various insults, microglia can develop innate immune memory (IIM), which can either enhance (priming or training) or repress (tolerance) the response to subsequent inflammatory challenges. Here, we investigate whether radiation affects the IIM of microglia by irradiating the brains of rats and later exposing them to a secondary inflammatory stimulus. Comparative transcriptomic profiling and protein validation of microglia isolated from irradiated rats show a stronger immune response to a secondary inflammatory insult, demonstrating that radiation can lead to long-lasting molecular reprogramming of microglia. Transcriptomic analysis of postmortem normal-appearing non-tumor brain tissue of patients with glioblastoma indicates that radiation-induced microglial priming is likely conserved in humans. Targeting microglial priming or avoiding further inflammatory insults could decrease radiotherapy-induced neurotoxicity.
Identifiants
pubmed: 38358885
pii: S2211-1247(24)00092-5
doi: 10.1016/j.celrep.2024.113764
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
113764Informations de copyright
Copyright © 2024 The Author(s). Published by Elsevier Inc. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of interests L.B. received funding from Ion Beam Applications (IBA) as part of the ZonMw Off-Road program; however, the company did not have any input and interpretation on the experiment design and data.