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Author (up) Fonken, L.K.; Bedrosian, T.A.; Zhang, N.; Weil, Z.M.; DeVries, A.C.; Nelson, R.J.
Title Dim light at night impairs recovery from global cerebral ischemia Type Journal Article
Year 2019 Publication Experimental Neurology Abbreviated Journal Exp Neurol
Volume 317 Issue Pages 100-109
Keywords Animals; mouse models; cerebral ischemia
Abstract Nighttime lighting is one of the great conveniences of modernization; however, there is mounting evidence that inopportune light exposure can disrupt physiological and behavioral functions. Hospital patients may be particularly vulnerable to the consequences of light at night due to their compromised physiological state. Cardiac arrest/cardiopulmonary resuscitation (CA) was used to test the hypothesis in mice that exposure to dim light at night impairs central nervous system (CNS) recovery from a major pathological insult. Mice exposed to dim light at night (5lx) had higher mortality in the week following cardiac arrest compared to mice housed in dark nights (0lx). Neuronal damage was significantly greater in surviving mice exposed to dim light at night after CA versus those housed in dark nights. Dim light at night may have elevated neuronal damage by amplifying pro-inflammatory pathways in the CNS; Iba1 immunoreactivity (an indication of microglia activation) and pro-inflammatory cytokine expression were elevated in mice exposed to dim light at night post-CA. Furthermore, selective inhibition of IL-1beta or TNFalpha ameliorated damage in mice exposed to dim light at night. The effects of light at night on CA outcomes were also prevented by using a wavelength of nighttime light that has minimal impact on the endogenous circadian clock, suggesting that replacing broad-spectrum nighttime light with specific circadian-inert wavelengths could be protective. Together, these data indicate that exposure to dim light at night after global cerebral ischemia increases neuroinflammation, in turn exacerbating neurological damage and potential for mortality.
Address Department of Neuroscience, Wexner Medical Center, The Ohio State University, Columbus, OH 43210, USA
Corporate Author Thesis
Publisher Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0014-4886 ISBN Medium
Area Expedition Conference
Notes PMID:30822422 Approved no
Call Number GFZ @ kyba @ Serial 2235
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