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- W3144801925 abstract "Recently, several studies have reported that low-dose radiation therapy (RT) suppresses the release of proinflammatory cytokines in inflammatory-degenerative disorders, including Alzheimer disease (AD). AD is the most common cause of dementia, and neuroinflammation is one of the major contributing factors in AD pathogenesis. Therefore, low-dose RT may be used clinically for treating AD. However, the appropriate doses, effects, and underlying mechanisms of RT in AD have not been determined. In this study, we aimed to determine the appropriate RT dose and schedule for AD treatment and to investigate the therapeutic effects and mechanisms of low-dose RT in AD.We first determined the proper dose and schedule for RT in late-stage AD using 8- to 9-month-old 5x Familial AD (5xFAD) mice, a well-known animal model of AD, by comparing the effects of a low total dose with low dose per fraction (LD-LDRT, 5 × 0.6 Gy) with those of a low moderate total dose with conventional dose per fraction (LMD-CDRT, 5 × 2 Gy).LD-LDRT and LMD-CDRT were found to reduce the levels of the proinflammatory cytokines CD54, IL-3, CXCL9/10, and CCL2/4 in the hippocampus of 5xFAD mice. Furthermore, increased microgliosis assessed using Iba-1 and CD68 dual immunostaining was significantly reduced by LD-LDRT and LMD-CDRT in the hippocampus of 5xFAD mice. Moreover, LD-LDRT and LMD-CDRT decreased the amyloid plaque burden in the hippocampus of 5xFAD mice and attenuated their cognitive impairment; these effects persisted for 4 to 5 weeks.The present study showed that LD-LDRT alleviates cognitive impairments and prevents the accumulation of amyloid plaques by regulating neuroinflammation in the late stage of AD in 5xFAD mice, with an efficacy equivalent to that of LMD-CDRT. Furthermore, the findings suggest that compared with LMD-CDRT, LD-LDRT may facilitate accessible and convenient treatment in clinical trials." @default.
- W3144801925 created "2021-04-13" @default.
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- W3144801925 date "2021-11-01" @default.
- W3144801925 modified "2023-10-15" @default.
- W3144801925 title "Modulation of Neuroinflammation by Low-Dose Radiation Therapy in an Animal Model of Alzheimer's Disease" @default.
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- W3144801925 doi "https://doi.org/10.1016/j.ijrobp.2021.06.012" @default.
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