Histological analysis of sleep and circadian brain circuitry in cranial radiation-induced hypersomnolence (C-RIH) mouse model.

Autor: Shuboni-Mulligan DD; Neuro-Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA. shubonimulligdd@nih.gov., Young D Jr; Neuro-Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA., De La Cruz Minyety J; Neuro-Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA., Briceno N; Neuro-Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA., Celiku O; Neuro-Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA., King AL; Neuro-Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA., Munasinghe J; Mouse Imaging Facility, National Institute of Neurological Disorder and Stroke, NIH, Bethesda, MD, USA., Wang H; Neuro-Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA., Adegbesan KA; Neuro-Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA., Gilbert MR; Neuro-Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA., Smart DK; Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA., Armstrong TS; Neuro-Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2022 Jul 01; Vol. 12 (1), pp. 11131. Date of Electronic Publication: 2022 Jul 01.
DOI: 10.1038/s41598-022-15074-0
Abstrakt: Disrupted sleep, including daytime hypersomnolence, is a core symptom reported by primary brain tumor patients and often manifests after radiotherapy. The biological mechanisms driving the onset of sleep disturbances after cranial radiation remains unclear but may result from treatment-induced injury to neural circuits controlling sleep behavior, both circadian and homeostatic. Here, we develop a mouse model of cranial radiation-induced hypersomnolence which recapitulates the human experience. Additionally, we used the model to explore the impact of radiation on the brain. We demonstrated that the DNA damage response following radiation varies across the brain, with homeostatic sleep and cognitive regions expressing higher levels of γH2AX, a marker of DNA damage, than the circadian suprachiasmatic nucleus (SCN). These findings were supported by in vitro studies comparing radiation effects in SCN and cortical astrocytes. Moreover, in our mouse model, MRI identified structural effects in cognitive and homeostatic sleep regions two-months post-treatment. While the findings are preliminary, they suggest that homeostatic sleep and cognitive circuits are vulnerable to radiation and these findings may be relevant to optimizing treatment plans for patients.
(© 2022. This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply.)
Databáze: MEDLINE
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