ArticleInternational journal of radiation oncology, biology, physics2024
Total-Body Irradiation Alters White Matter Volume and Microstructural Integrity in Rhesus Macaques.
Article in International journal of radiation oncology, biology, physics, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed, 5 citations in OpenAlex.
- γ-radiation reduces phosphorylated-tau in rhesus macaque brains: potential implications for Alzheimer's disease and other tauopathies.Alzheimer's research & therapy · 2026Article
- γ-Radiation Reduces phosphorylated-Tau in RhesusMacaque Brains: Potential Implications forAlzheimer's Disease and other Tauopathies.Research square · 2026Article
- Radiation-induced Brain Injury and the Radiation Late Effects Cohort (RLEC) of Rhesus Macaques (Macaca mulatta).Radiation research · 2025Review
- Radiation Decreases Bone Density while Diabetes Increases Osteoarthritis in Non-Human Primates.Radiation research · 2025Article
- Widespread Multimorbidity in a Cohort of Aging, Radiation-exposed Rhesus Macaques.Radiation research · 2025Article
- The Wake Forest Nonhuman Primate Radiation Late Effects Cohort.Radiation research · 2025Article
- Article
- Radiation-induced brain injury in non-human primates: A dual tracer PET study with [Neuroimage. Reports · 2025Article
- Secretory factors released from high dose radiation-activated osteoclasts increase the expression level of pain-associated neuropeptides in sensory neuronal cultures.Research square · 2024Article
- Biomarker-driven molecular imaging probes in radiotherapy.Theranostics · 2024Review
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Authors and funding
11 authors at 2 institutions in 1 country.
Funding
Abstract
purposeLong-term survivors of brain irradiation can experience irreversible injury and cognitive impairment. T1-weighted and diffusion tensor magnetic resonance imaging (MRI) are used to evaluate brain volume and white matter (WM) microstructure in neurodevelopmental and neurodegenerative conditions. The goal of this study was to evaluate the long-term effects of single-dose total-body irradiation (TBI) or TBI with 5% partial-body sparing on brain volumetrics and WM integrity in macaques. METHODS AND MATERIALS: We used MRI scans from a cohort of male rhesus macaques (age range, 3.6-22.8 years) to compare global and regional brain volumes and WM diffusion in survivors of TBI (T1-weighted, n = 137; diffusion tensor imaging, n = 121; dose range, 3.5-10 Gy) with unirradiated controls (T1-weighted, n = 48; diffusion tensor imaging, n = 38).
resultsIn all regions of interest, radiation affected age-related changes in fractional anisotropy, which tended to increase across age in both groups but to a lesser extent in the irradiated group (interaction P < .01). Depending on the region of interest, mean diffusivity decreased or remained the same across age in unirradiated animals, whereas it increased or did not change in irradiated animals. The increases in mean diffusivity were driven by changes in radial diffusivity, which followed similar trends across age. Axial diffusivity did not differ by irradiation status. Age-related changes in relative volumes in controls reflected normal trends in humans, with increasing WM and decreasing gray matter until middle age. Cerebrospinal fluid (CSF) volume did not differ across age in controls. WM volume was lower and CSF volume was higher in young irradiated macaques. WM volume was similar between groups, and CSF volume lower in older irradiated macaques. Gray matter volume was unaffected by radiation.
conclusionsTBI results in delayed WM expansion and long-term disruption of WM integrity. Diffusion changes suggest that myelin injury in WM is a hallmark of late-delayed radiation-induced brain injury.
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