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- W1839562273 endingPage "373" @default.
- W1839562273 startingPage "343" @default.
- W1839562273 abstract "Enhancing lighting conditions in institutions for individuals with dementia improves their sleep, circadian rhythms and well-being. Here, we report first findings that exposure to brighter light during daytime may support the immune response to the annual influenza vaccination. Eighty older institutionalised patients suffering from dementia (54 women and 26 men) continuously wore an activity tracker for 8 weeks to assess individual light exposure and rest-activity cycles. We analysed the patients’ immune response from two blood samples taken before and 4 weeks after the annual influenza vaccination. Individual antibody concentrations to three influenza virus strains (H3N2, H1N1, IB) were quantified via hemagglutination inhibition assays. By quantifying individual light exposure profiles (including daylight), we classified the patients into a low and a high light exposure group based on a median illuminance of 392.6 lux. The two light exposure groups did not differ in cognitive impairment severity, age or gender distribution. However, patients in the high light exposure group showed a significantly greater circadian rest-activity amplitude (i.e., more daytime activity and less nighttime activity) along with a significantly greater antibody titer increase to the H3N2 vaccine than patients in the low light exposure group, despite similar pre-vaccination concentrations. Sufficient seroprotective responses to all three influenza virus strains were attained for ≥75% of participants. These data provide preliminary evidence for a potentially enhanced immune response in patients with dementia when they received more daily light. Future studies are needed to determine whether regular daily light exposure may have beneficial effects on the human immune system, either directly or via a stabilising circadian sleep-wake rhythms." @default.
- W1839562273 created "2016-06-24" @default.
- W1839562273 creator A5041129618 @default.
- W1839562273 creator A5052712397 @default.
- W1839562273 creator A5059042888 @default.
- W1839562273 creator A5062503784 @default.
- W1839562273 creator A5062699424 @default.
- W1839562273 creator A5088539070 @default.
- W1839562273 date "2002-01-01" @default.
- W1839562273 modified "2023-10-06" @default.
- W1839562273 title "Brain aging and Alzheimer's disease; use it or lose it" @default.
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