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Zimmerman AB, Yuhas PT, Citek K. Letter to the Editor: The Spectral Bands Task Force: A consensus on the representation of high-energy visible radiation. Optom Vis Sci 2024; 101:176-178. [PMID: 38684059 DOI: 10.1097/opx.0000000000002124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024] Open
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2
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Nelson XJ, Taylor AH, Cartmill EA, Lyn H, Robinson LM, Janik V, Allen C. Joyful by nature: approaches to investigate the evolution and function of joy in non-human animals. Biol Rev Camb Philos Soc 2023; 98:1548-1563. [PMID: 37127535 DOI: 10.1111/brv.12965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 04/12/2023] [Accepted: 04/17/2023] [Indexed: 05/03/2023]
Abstract
The nature and evolution of positive emotion is a major question remaining unanswered in science and philosophy. The study of feelings and emotions in humans and animals is dominated by discussion of affective states that have negative valence. Given the clinical and social significance of negative affect, such as depression, it is unsurprising that these emotions have received more attention from scientists. Compared to negative emotions, such as fear that leads to fleeing or avoidance, positive emotions are less likely to result in specific, identifiable, behaviours being expressed by an animal. This makes it particularly challenging to quantify and study positive affect. However, bursts of intense positive emotion (joy) are more likely to be accompanied by externally visible markers, like vocalisations or movement patterns, which make it more amenable to scientific study and more resilient to concerns about anthropomorphism. We define joy as intense, brief, and event-driven (i.e. a response to something), which permits investigation into how animals react to a variety of situations that would provoke joy in humans. This means that behavioural correlates of joy are measurable, either through newly discovered 'laughter' vocalisations, increases in play behaviour, or reactions to cognitive bias tests that can be used across species. There are a range of potential situations that cause joy in humans that have not been studied in other animals, such as whether animals feel joy on sunny days, when they accomplish a difficult feat, or when they are reunited with a familiar companion after a prolonged absence. Observations of species-specific calls and play behaviour can be combined with biometric markers and reactions to ambiguous stimuli in order to enable comparisons of affect between phylogenetically distant taxonomic groups. Identifying positive affect is also important for animal welfare because knowledge of positive emotional states would allow us to monitor animal well-being better. Additionally, measuring if phylogenetically and ecologically distant animals play more, laugh more, or act more optimistically after certain kinds of experiences will also provide insight into the mechanisms underlying the evolution of joy and other positive emotions, and potentially even into the evolution of consciousness.
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Affiliation(s)
- Ximena J Nelson
- Private Bag 4800, School of Biological Sciences, University of Canterbury, Christchurch, New Zealand
| | - Alex H Taylor
- Institut de Neurociències, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, 08193, Spain
- ICREA, Pg. Lluís Companys, 23, Barcelona, Spain
- School of Psychology, The University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Erica A Cartmill
- Departments of Anthropology and Psychology, UCLA, 375 Portola Plaza, Los Angeles, CA, 90095, USA
| | - Heidi Lyn
- Department of Psychology, University of South Alabama, 75 S. University Blvd., Mobile, AL, 36688, USA
| | - Lauren M Robinson
- Domestication Lab, Konrad Lorenz Institute of Ethology, University of Veterinary Medicine, Vienna, Savoyenstraße 1a, Vienna, A-1160, Austria
| | - Vincent Janik
- Scottish Oceans Institute, School of Biology, University of St. Andrews, St Andrews, KY16 8LB, UK
| | - Colin Allen
- Department of History & Philosophy of Science, University of Pittsburgh, 1101 Cathedral of Learning, 4200 Fifth Ave, Pittsburgh, PA, 15260, USA
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Qu Y, Zhuang L, Zhang H, Liu C, Wang X. The Effects of Light Therapy for Depression in Dementia: A Systematic Review and Meta-Analysis. J Alzheimers Dis 2023:JAD221204. [PMID: 37182876 DOI: 10.3233/jad-221204] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
BACKGROUND Depression is one of the most common symptoms in patients with dementia. OBJECTIVE This meta-analysis aimed to evaluate the effect of light therapy on depression associated with dementia by using a single scale. METHODS Published studies based on the terms including "Dementia", "depression", and "Phototherapy" were searched. Web of Science, PubMed, Embase, CiNii, CNKI, Wanfang Database, and China Biology Medicine disc were adopted to collect randomized controlled studies or cross-controlled studies using the Cornell Dementia Depression Scale (CSDD) until February 2022. GRADE and Review Manager Version 5.4.1 were employed to assess the risk of bias. A meta-analysis was conducted by R 4.0.2 software based on the changes in CSDD scores. RESULTS A total of 1,055 studies were retrieved from the databases, and six studies were included after screening. Some 406 people with dementia were included with an average age of over 80 years. Forest plot results showed that light intervention improved depression scores of dementia patients (MD = -2.59, 95% CI: -4.46 to -0.71), and light intensity less than 1000 lux improved depression symptoms of dementia patients (MD = -2.76, 95% CI: -4.55 to -0.97). An intervention that lasted 8 to 12 weeks was the most effective (MD = -3.77, 95% CI: -6.93 to -0.60), and non-stable interventions such as ceiling LED lights exerted more positive effects (MD = -2.12, 95% CI: -3.38 to -0.85). CONCLUSION The overall results of the meta-analysis suggested that light intervention can improve the depressive symptoms of older patients with dementia.
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Affiliation(s)
- Yi Qu
- School of Architecture and Fine Art, Dalian University of Technology, Dalian, China
| | - Lin Zhuang
- School of Architecture and Fine Art, Dalian University of Technology, Dalian, China
| | - Huiying Zhang
- School of Jiang He Architecture, Northeastern University, Shenyang, China
| | - Chang Liu
- School of Jiang He Architecture, Northeastern University, Shenyang, China
| | - Xiaonan Wang
- Department of Gerontology and Geriatrics, The First Hospital of China Medical University, Shenyang, China
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Theruveethi N, Joshi MB, Jathanna JS, Valiathan M, Kabekkodu SP, Bhandarkar M, Thomas RH, Thangarajan R, Bhat SS, Surendran S. Effect of Light Emitting Diodes (LED) Exposure on Vitreous Metabolites-Rodent Study. Metabolites 2023; 13:metabo13010081. [PMID: 36677006 PMCID: PMC9861686 DOI: 10.3390/metabo13010081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/20/2022] [Accepted: 12/28/2022] [Indexed: 01/06/2023] Open
Abstract
The exposure to blue and white Light emitting diodes (LED) light leads to damage in the visual system with short-term LED light exposure. Chronic exposure, adaptive responses to light, and self-protective mechanisms against LED light exposures need to be explored, and it would be essential to understand the repercussions of LED radiation on vitreous metabolites. A total of 24 male Wistar rats were used in this study, divided into four groups (n = 6 in each group). Three experimental groups of rats were exposed to either blue, white, or yellow LED light for 90 days (12:12 light-dark cycle routine) with uniform illumination (450−500 lux). Standard lab settings were used to maintain control rats. Vitreous fluids were subjected to untargeted metabolomics analysis using liquid chromatography-mass spectrometry (LC/MS). PLS-DA analysis indicated significant the separation of m metabolites among groups, suggesting that LED exposure induces metabolic reprogramming in the vitreous. Amino acids and their modifications showed significant alterations among groups which included D-alanine, D-serine (p < 0.05), lysine (p < 0.001), aspartate (p = 0.0068), glutathione (p = 0.0263), taurine (p = 0.007), and hypotaurine. In chronic light exposure, the self-protective or reworking system could be depleted, which may decrease the ability to compensate for the defending mechanism. This might fail to maintain the metabolomic structural integrity of the vitreous metabolites.
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Affiliation(s)
- Nagarajan Theruveethi
- Department of Optometry, Manipal College of Health Professions, Manipal Academy of Higher Education, Manipal 576104, India
| | - Manjunath B. Joshi
- Department of Ageing Research, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal 576104, India
| | - Judith S. Jathanna
- Department of Optometry, Manipal College of Health Professions, Manipal Academy of Higher Education, Manipal 576104, India
| | - Manna Valiathan
- Kasturba Medical College Manipal, Manipal Academy of Higher Education, Manipal 576104, India
| | - Shama Prasada Kabekkodu
- Department of Cell and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal 576104, India
| | - Manasa Bhandarkar
- Department of Optometry, Manipal College of Health Professions, Manipal Academy of Higher Education, Manipal 576104, India
| | - R. Huban Thomas
- Kasturba Medical College Manipal, Manipal Academy of Higher Education, Manipal 576104, India
| | - Rajesh Thangarajan
- Department of Anatomy, International Medical School, Management and Science University (MSU), Shah Alam 40100, Malaysia
| | - Shailaja S. Bhat
- Kasturba Medical College Manipal, Manipal Academy of Higher Education, Manipal 576104, India
| | - Sudarshan Surendran
- American University of Antigua College of Medicine, University Park, Jabberwock Beach Road, Coolidge P.O. Box 1451, Antigua and Barbuda
- Correspondence:
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Xiao J, Jin S, Wang X, Huang J, Zou H. CELF1 Selectively Regulates Alternative Splicing of DNA Repair Genes Associated With Cataract in Human Lens Cell Line. Biochem Genet 2022:10.1007/s10528-022-10324-2. [PMID: 36585568 DOI: 10.1007/s10528-022-10324-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 12/16/2022] [Indexed: 12/31/2022]
Abstract
Cataract is a global eye disease caused by the opacification of lens, while its underlying molecular pathogenesis is not clear, making it difficult for prevention. CELF1, an RNA binding protein, mediates Alternative Splicing (AS) of genes involved in diverse diseases and regulates development or defects of lens. Utilizing transcriptome-wide approaches, we analyzed and compared AS patterns between human lens epithelial cells (SRA01/04) with CELF1 overexpression (CELF1-OE) and control cells. Extensive changes in AS patterns upon CELF1-OE were identified in SRA01/04 cells. We finally identified 840 CELF1-regulated AS events (RASEs) and found that CELF1-OE preferred to repress exon skipping events in SRA01/04 cells. CELF1-regulated AS genes were enriched in the regulation of DNA repair, cellular response to DNA damage stimulus, and apoptosis pathways (including HMGA2, CSNK1E, and YAP1). These biological functions and pathways have been reported to be associated with lens development or other eye diseases. To further explore the mechanisms of CELF1 in regulating AS genes, we downloaded and re-analyzed a set of CELF1-RNA interactome data. We found that 194 genes were bound and regulated by CELF1 at the AS level. 10 genes involved in DNA repair-related pathways were also bound by CELF1. Motif analysis for CELF1-bound peaks and splicing sites of RASEs showed that CELF1 regulates AS by binding to the AGGU[AG]AG motif in SRA01/04 cells. CELF1 could mediate AS of DNA repair-related genes through directly binding to their transcripts with distinct motif bias. The functional mechanism of CELF1 may ultimately participate in cataract formation and lens development.
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Affiliation(s)
- Jun Xiao
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, China
| | - Siyan Jin
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, China
| | - Xue Wang
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, China
| | - Ju Huang
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, China
| | - He Zou
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, China.
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Ricketts EJ, Joyce DS, Rissman AJ, Burgess HJ, Colwell CS, Lack LC, Gradisar M. Electric lighting, adolescent sleep and circadian outcomes, and recommendations for improving light health. Sleep Med Rev 2022; 64:101667. [PMID: 36064209 PMCID: PMC10693907 DOI: 10.1016/j.smrv.2022.101667] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 06/23/2022] [Accepted: 06/24/2022] [Indexed: 01/26/2023]
Abstract
Light is a potent circadian entraining agent. For many people, daily light exposure is fundamentally dysregulated with reduced light during the day and increased light into the late evening. This lighting schedule promotes chronic disruption to circadian physiology resulting in a myriad of impairments. Developmental changes in sleep-wake physiology suggest that such light exposure patterns may be particularly disruptive for adolescents and further compounded by lifestyle factors such as early school start times. This narrative review describes evidence that reduced light exposure during the school day delays the circadian clock, and longer exposure durations to light-emitting electronic devices in the evening suppress melatonin. While home lighting in the evening can suppress melatonin secretion and delay circadian phase, the patterning of light exposure across the day and evening can have moderating effects. Photic countermeasures may be flexibly and scalably implemented to support sleep-wake health; including manipulations of light intensity, spectra, duration and delivery modality across multiple contexts. An integrative approach addressing physiology, attitudes, and behaviors will support optimization of light-driven sleep-wake outcomes in adolescents.
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Affiliation(s)
- Emily J Ricketts
- Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, CA, United States.
| | - Daniel S Joyce
- Department of Psychology, University of Nevada, Reno, NV, United States; School of Psychology and Wellbeing, The University of Southern Queensland, Ipswich, QLD, Australia
| | - Ariel J Rissman
- Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, CA, United States
| | - Helen J Burgess
- Department of Psychiatry, University of Michigan, Ann Arbor, MI, United States
| | - Christopher S Colwell
- Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, CA, United States
| | - Leon C Lack
- Adelaide Institute for Sleep Health, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia; College of Education, Psychology and Social Work, Flinders University, Adelaide, SA, Australia
| | - Michael Gradisar
- WINK Sleep Pty Ltd, Adelaide, SA, Australia; Sleep Cycle AB, Gothenburg, Sweden
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Mainster MA, Findl O, Dick HB, Desmettre T, Ledesma-Gil G, Curcio CA, Turner PL. The Blue Light Hazard Versus Blue Light Hype. Am J Ophthalmol 2022; 240:51-57. [PMID: 35227699 PMCID: PMC10243475 DOI: 10.1016/j.ajo.2022.02.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 02/14/2022] [Accepted: 02/16/2022] [Indexed: 11/01/2022]
Abstract
PURPOSE The blue light hazard is the experimental finding that blue light is highly toxic to the retina (photic retinopathy), in brief abnormally intense exposures, including sungazing or vitreoretinal endoillumination. This term has been misused commercially to suggest, falsely, that ambient environmental light exposure causes phototoxicity to the retina, leading to age-related macular degeneration (AMD). We analyze clinical, epidemiologic, and biophysical data regarding blue-filtering optical chromophores. DESIGN Perspective. METHODS Analysis and integration of data regarding the blue light hazard and blue-blocking filters in ophthalmology and related disciplines. RESULTS Large epidemiologic studies show that blue-blocking intraocular lenses (IOLs) do not decrease AMD risk or progression. Blue-filtering lenses cannot reduce disability glare because image and glare illumination are decreased in the same proportion. Blue light essential for optimal rod and retinal ganglion photoreception is decreased by progressive age-related crystalline lens yellowing, pupillary miosis, and rod and retinal ganglion photoreceptor degeneration. Healthful daily environmental blue light exposure decreases in older adults, especially women. Blue light is important in dim environments where inadequate illumination increases risk of falls and associated morbidities. CONCLUSIONS The blue light hazard is misused as a marketing stratagem to alarm people into using spectacles and IOLs that restrict blue light. Blue light loss is permanent for pseudophakes with blue-blocking IOLs. Blue light hazard misrepresentation flourishes despite absence of proof that environmental light exposure or cataract surgery causes AMD or that IOL chromophores provide clinical protection. Blue-filtering chromophores suppress blue light critical for good mental and physical health and for optimal scotopic and mesopic vision.
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Affiliation(s)
- Martin A Mainster
- Department of Ophthalmology, University of Kansas School of Medicine, Prairie Village, Kansas, USA.
| | - Oliver Findl
- Vienna Institute for Research in Ocular Surgery, A Karl Landsteiner Institute, Hanusch Hospital, Vienna, Austria
| | - H Burkhard Dick
- Department of Ophthalmology, Ruhr University Eye Hospital, Science, Bochum, Germany
| | | | - Gerardo Ledesma-Gil
- Retina Department, Institute of Ophthalmology, Fundación Conde de Valenciana, Mexico City, Mexico
| | - Christine A Curcio
- Department of Ophthalmology and Visual Sciences, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Patricia L Turner
- Department of Ophthalmology, University of Kansas School of Medicine, Prairie Village, Kansas, USA
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Elliott JE, Tinsley CE, Reynolds C, Olson RJ, Weymann KB, Au-Yeung WTM, Wilkerson A, Kaye JA, Lim MM. Tunable White Light for Elders (TWLITE): A Protocol Demonstrating Feasibility and Acceptability for Deployment, Remote Data Collection, and Analysis of a Home-Based Lighting Intervention in Older Adults. SENSORS 2022; 22:s22145372. [PMID: 35891052 PMCID: PMC9320387 DOI: 10.3390/s22145372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Revised: 06/25/2022] [Accepted: 07/11/2022] [Indexed: 12/10/2022]
Abstract
Sleep disturbances are common in older adults and may contribute to disease progression in certain populations (e.g., Alzheimer's disease). Light therapy is a simple and cost-effective intervention to improve sleep. Primary barriers to light therapy are: (1) poor acceptability of the use of devices, and (2) inflexibility of current devices to deliver beyond a fixed light spectrum and throughout the entirety of the day. However, dynamic, tunable lighting integrated into the native home lighting system can potentially overcome these limitations. Herein, we describe our protocol to implement a whole-home tunable lighting system installed throughout the homes of healthy older adults already enrolled in an existing study with embedded home assessment platforms (Oregon Center for Aging & Technology-ORCATECH). Within ORCATECH, continuous data on room location, activity, sleep, and general health parameters are collected at a minute-to-minute resolution over years of participation. This single-arm longitudinal protocol collected participants' light usage in addition to ORCATECH outcome measures over a several month period before and after light installation. The protocol was implemented with four subjects living in three ORCATECH homes. Technical/usability challenges and feasibility/acceptability outcomes were explored. The successful implementation of our protocol supports the feasibility of implementing and integrating tunable whole-home lighting systems into an automated home-based assessment platform for continuous data collection of outcome variables, including long-term sleep measures. Challenges and iterative approaches are discussed. This protocol will inform the implementation of future clinical intervention trials using light therapy in patients at risk for developing Alzheimer's disease and related conditions.
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Affiliation(s)
- Jonathan E. Elliott
- VA Portland Health Care System, Research Service, Portland, OR 97239, USA; (J.E.E.); (C.E.T.); (R.J.O.)
- Department of Neurology, Oregon Health & Science University, Portland, OR 97239, USA; (C.R.); (W.-T.M.A.-Y.); (J.A.K.)
| | - Carolyn E. Tinsley
- VA Portland Health Care System, Research Service, Portland, OR 97239, USA; (J.E.E.); (C.E.T.); (R.J.O.)
- Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, OR 97239, USA
| | - Christina Reynolds
- Department of Neurology, Oregon Health & Science University, Portland, OR 97239, USA; (C.R.); (W.-T.M.A.-Y.); (J.A.K.)
| | - Randall J. Olson
- VA Portland Health Care System, Research Service, Portland, OR 97239, USA; (J.E.E.); (C.E.T.); (R.J.O.)
| | | | - Wan-Tai M. Au-Yeung
- Department of Neurology, Oregon Health & Science University, Portland, OR 97239, USA; (C.R.); (W.-T.M.A.-Y.); (J.A.K.)
| | | | - Jeffrey A. Kaye
- Department of Neurology, Oregon Health & Science University, Portland, OR 97239, USA; (C.R.); (W.-T.M.A.-Y.); (J.A.K.)
| | - Miranda M. Lim
- Department of Neurology, Oregon Health & Science University, Portland, OR 97239, USA; (C.R.); (W.-T.M.A.-Y.); (J.A.K.)
- Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, OR 97239, USA
- Oregon Institute of Occupational Health Sciences, Oregon Health & Science University, Portland, OR 97239, USA
- Pulmonary and Critical Care Medicine, Oregon Health & Science University, Portland, OR 97239, USA
- VA Portland Health Care System, Mental Illness Research Education and Clinical Center, Neurology, National Center for Rehabilitative Auditory Research, Portland, OR 97239, USA
- Correspondence: ; Tel.: +1-503-220-8262 (ext. 57404)
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Wang J, Di H. Natural light exposure and circadian rhythm: a potential therapeutic approach for disorders of consciousness. Sleep 2022; 45:6571981. [DOI: 10.1093/sleep/zsac094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Jing Wang
- International Unresponsive Wakefulness Syndrome and Consciousness Science Institute, Hangzhou Normal University , Hangzhou , China
| | - Haibo Di
- International Unresponsive Wakefulness Syndrome and Consciousness Science Institute, Hangzhou Normal University , Hangzhou , China
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Mu J, Kang J. Indoor Environmental Quality of Residential Elderly Care Facilities in Northeast China. Front Public Health 2022; 10:860976. [PMID: 35602153 PMCID: PMC9116475 DOI: 10.3389/fpubh.2022.860976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 04/01/2022] [Indexed: 11/13/2022] Open
Abstract
The indoor environmental quality is based on the indoor environmental performance of buildings, such as air temperature, lighting, and acoustics. These parameters have a specific impact on users' health and experience. This study explores the relationship between the indoor environment of residential elderly care facilities in cold regions and the sensitivity of the elderly to these facilities with the aim of improving the elderly care environment. This study measured the acoustic, lighting, and thermal environment in four residential elderly care facilities in Northeast China in spring, summer, autumn, and winter through a participant survey. In the residential elderly care facilities surveyed in this study, brightness and illuminance show a nonlinear relationship with lighting evaluation. With an increase in brightness and illuminance, the satisfaction of the lighting environment in different seasons first increases and then decreases. The relative humidity of the different types of rooms varies greatly in spring and less in winter. The average air quality score of the bedroom is higher than that of the activity room. The correlation between odor assessment and overall indoor environmental quality is very poor. The results of the questionnaire survey indicate that the participants were satisfied with the facilities' overall indoor environmental quality. This quality is affected by physical, environmental, and demographic factors. This study provides a reference for the design of other residential elderly care facilities.
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Affiliation(s)
- Jingyi Mu
- School of Architecture, Key Laboratory of Cold Region Urban and Rural Human Settlement Environment Science and Technology, Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin, China
| | - Jian Kang
- Institute for Environmental Design and Engineering, The Bartlett, University College London, London, United Kingdom
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Guu T, Aarsland D, ffytche D. Light, sleep-wake rhythm, and behavioural and psychological symptoms of dementia in care home patients: Revisiting the sundowning syndrome. Int J Geriatr Psychiatry 2022; 37:10.1002/gps.5712. [PMID: 35470491 PMCID: PMC9324910 DOI: 10.1002/gps.5712] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 03/29/2022] [Indexed: 11/29/2022]
Abstract
OBJECTIVES It is believed that inadequate environmental light, especially in facilities such as care homes, contribute to the diurnal changes of behavioural and psychological symptoms of dementia (BPSD) historically referred to as "sundowning syndrome". Conceptual models of sundowning phenomena have shifted emphasis from the role of light in vision (image forming) to its role in circadian rhythm modulation. However, the grounds for this change are unclear and the evidence on which it is based has not been examined comprehensively. METHODS We have searched literature on sundowning syndrome and its association with light and studies evaluating BPSD, behavioural rhythm and environmental light in care homes in four databases (PubMed, Web of Science, Embase and Cochrane Library) from inception to 31 January 2021. RESULTS Of the nine studies investigating light, behavioural rhythm and BPSD in care homes identified, we found evidence that insufficient natural light exposure was associated with worsening of BPSD and disrupted activity rhythm but it was not clear whether this related to image forming or disrupted circadian rhythm. There was a paucity of evidence in relation to the role of low levels of light for image forming in the context of a specific BPSD symptom: visual hallucinations. We also found literature on the possible role of light outside the visible spectrum influencing cognition. Based on the evidence, we proposed a new model integrating different components of light in BPSD and sundowning syndrome that combines its image forming and circadian roles. CONCLUSIONS Inadequate light may be a risk factor for BPSD and sundowning syndrome for dementia patients through a range of different mechanisms. It is recommended that multiple neuro-endocrinological and socio-environmental factors relevant to light such as adjusting the environmental setting, increasing light exposure, and scheduling activities should be considered when treating dementia patients with BPSD.
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Affiliation(s)
- Ta‐Wei Guu
- Departments of Internal Medicine, Division of PsychiatryChina Medical University Beigang HospitalYunlinTaiwan,Sleep Medicine Center and Mind‐Body Interface Laboratory (MBI‐Lab)China Medical University HospitalTaichungTaiwan,Department of Old Age Psychiatry, Institute of Psychiatry, Psychology and NeuroscienceKing's College LondonLondonUK
| | - Dag Aarsland
- Department of Old Age Psychiatry, Institute of Psychiatry, Psychology and NeuroscienceKing's College LondonLondonUK,National Institute for Health Research (NIHR) Maudsley Biomedical Research Centre (BRC) at South London and Maudsley NHS Foundation TrustLondonUK,Centre for Age‐Related MedicineStavanger University HospitalStavangerNorway
| | - Dominic ffytche
- Department of Old Age Psychiatry, Institute of Psychiatry, Psychology and NeuroscienceKing's College LondonLondonUK,National Institute for Health Research (NIHR) Maudsley Biomedical Research Centre (BRC) at South London and Maudsley NHS Foundation TrustLondonUK
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12
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Short-wavelength light exposure at night and sleep disturbances accompanied by decreased melatonin secretion in real-life settings: a cross-sectional study of the HEIJO-KYO cohort. Sleep Med 2022; 90:192-198. [DOI: 10.1016/j.sleep.2022.01.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 01/18/2022] [Accepted: 01/26/2022] [Indexed: 11/18/2022]
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13
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Mehramiz M, Porter T, Laws SM, Rainey-Smith SR. Sleep, Sirtuin 1 and Alzheimer's disease: A review. AGING BRAIN 2022; 2:100050. [PMID: 36908890 PMCID: PMC9997138 DOI: 10.1016/j.nbas.2022.100050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 08/01/2022] [Accepted: 08/09/2022] [Indexed: 11/25/2022] Open
Abstract
Sleep plays a major role in brain health, and cognition. Disrupted sleep is a well-described symptom of Alzheimer's disease (AD). However, accumulating evidence suggests suboptimal sleep also increases AD risk. The deacetylase Sirtuin 1 (Sirt 1), encoded by the SIRT1 gene, impacts sleep via its relationship to wake-sleep neurotransmitters and somnogens. Evidence from animal and human studies supports a significant and complex relationship between sleep, Sirt 1/ SIRT1 and AD. Numerous hypotheses attempt to explain the critical impact of Sirt 1/ SIRT1 on wake- and sleep- promoting neurons, their related mechanisms and neurotransmitters. However, there is a paucity of studies assessing the interaction between sleep and Sirt 1/ SIRT1, as a principal component of sleep regulation, on AD pathology. In this review, we explore the potential association between Sirt 1/ SIRT1, sleep, and AD aetiology. Given sleep is a likely modifiable risk factor for AD, and recent studies suggest Sirt 1/ SIRT1 activation can be modulated by lifestyle or dietary approaches, further research in this area is required to explore its potential as a target for AD prevention and treatment.
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Affiliation(s)
- Mehrane Mehramiz
- Centre for Precision Health, Edith Cowan University, Joondalup, WA, Australia.,Collaborative Genomics and Translation Group, School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA, Australia
| | - Tenielle Porter
- Centre for Precision Health, Edith Cowan University, Joondalup, WA, Australia.,Collaborative Genomics and Translation Group, School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA, Australia.,School of Pharmacy and Biomedical Sciences, Faculty of Health Sciences, Curtin Health Innovation Research Institute, Curtin University, Bentley, WA, Australia
| | - Simon M Laws
- Centre for Precision Health, Edith Cowan University, Joondalup, WA, Australia.,Collaborative Genomics and Translation Group, School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA, Australia.,School of Pharmacy and Biomedical Sciences, Faculty of Health Sciences, Curtin Health Innovation Research Institute, Curtin University, Bentley, WA, Australia
| | - Stephanie R Rainey-Smith
- Centre for Healthy Ageing, Health Futures Institute, Murdoch University, Murdoch, WA, Australia.,Lifestyle Approaches Towards Cognitive Health Research Group, Murdoch University, Murdoch, WA, Australia.,Australian Alzheimer's Research Foundation (Ralph and Patricia Sarich Neuroscience Research Institute), Nedlands, WA, Australia.,Centre of Excellence for Alzheimer's Disease Research and Care, Edith Cowan University, Joondalup, WA, Australia.,School of Psychological Science, University of Western Australia, Crawley, WA, Australia
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14
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Yu H, Wang Q, Wu W, Zeng W, Feng Y. Therapeutic Effects of Melatonin on Ocular Diseases: Knowledge Map and Perspective. Front Pharmacol 2021; 12:721869. [PMID: 34795578 PMCID: PMC8593251 DOI: 10.3389/fphar.2021.721869] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 09/30/2021] [Indexed: 01/08/2023] Open
Abstract
Melatonin plays a critical role in the pathophysiological process including circadian rhythm, apoptosis, and oxidative stress. It can be synthesized in ocular tissues, and its receptors are also found in the eye, triggering more investigations concentrated on the role of melatonin in the eye. In the past decades, the protective and therapeutic potentials of melatonin for ocular diseases have been widely revealed in animal models. Herein, we construct a knowledge map of melatonin in treating ocular diseases through bibliometric analysis and review its current understanding and clinical evidence. The overall field could be divided into twelve topics through keywords co-occurrence analysis, in which the glaucoma, myopia, and retinal diseases were of greatest research interests according to the keywords burst detection. The existing clinical trials of melatonin in ocular diseases mainly focused on the glaucoma, and more research should be promoted, especially for various diseases and drug administration. We also discuss its bioavailability and further research topics including developing melatonin sensors for personalized medication, acting as stem cell therapy assistant drug, and consuming food-derived melatonin for facilitating its clinical transformation.
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Affiliation(s)
- Haozhe Yu
- Department of Ophthalmology, Peking University Third Hospital, Beijing, China.,Institute of Medical Technology, Peking University Health Science Center, Beijing, China
| | - Qicong Wang
- Department of Chinese Medicine of Taiwan, Hong Kong and Macao, Beijing University of Chinese Medicine, Beijing, China
| | - Wenyu Wu
- Department of Ophthalmology, Peking University Third Hospital, Beijing, China
| | - Weizhen Zeng
- Department of Ophthalmology, Peking University Third Hospital, Beijing, China
| | - Yun Feng
- Department of Ophthalmology, Peking University Third Hospital, Beijing, China.,Institute of Medical Technology, Peking University Health Science Center, Beijing, China
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15
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Xu YX, Zhang AH, Yu Y, Wan YH, Tao FB, Sun Y. Sex-specific association of exposure to bedroom light at night with general and abdominal adiposity in young adults. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 223:112561. [PMID: 34348191 DOI: 10.1016/j.ecoenv.2021.112561] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 07/21/2021] [Accepted: 07/23/2021] [Indexed: 06/13/2023]
Abstract
Experimental animal studies and limited epidemiologic evidence among elder population suggest that exposure to light at night (LAN) may be obesogenic. Nevertheless, little is known about the possible impact of bedroom LAN exposure on subsequent adiposity and the distribution pattern of the accumulated fat, especially in younger population. Here, we estimated longitudinal associations of objectively assessed bedroom LAN exposure with general and abdominal adiposity among young adults. We measured 2-night bedroom LAN exposure using a portable illuminometer in a cohort of young adults (n = 482). Body composition using multifrequency bioelectrical impedance analysis was evaluated at baseline and 1-year follow-up visit. Significant increases in fat mass (2.4 kg, P = 0.015 in male; 1.9 kg, P < 0.001 in female), visceral fat area (10.7 cm2, P < 0.001 in male; 5.0 cm2, P = 0.01 in female), waist circumference (3.8 cm, P = 0.039 in male; 2.5 cm, P = 0.047 in female) and percentage of body fat (3.6%, P = 0.002 in male; 3.0%, P = 0.001 in female) were observed among individuals with bedroom LAN higher than 5 lx. Compared to the lowest quartile group of bedroom LAN exposure, the highest quartile group was associated with an increase of 0.64 kg/m2 in BMI (95% CI: 0.18-1.09 kg/m2; P = 0.006) and 1.22 kg increase in fat mass (95% CI: 0.10-2.34 kg; P = 0.025) among female participants, and 10.58 cm2 in visceral fat area (95% CI: 4.85-16.31 cm2; P = 0.001) and 2.59 cm in waist circumference (95% CI: 0.37-4.81 cm; P = 0.023) among male participants. In this cohort of Chinese young adults, significant associations were observed between bedroom LAN exposure and adiposity in a sex- and fat depot-specific fashion. Further intervention and longitudinal studies could help elucidate the actual effects and develop sex-specific strategies against lifetime obesity and related metabolic disorders.
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Affiliation(s)
- Yu-Xiang Xu
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, Hefei, Anhui, China
| | - An-Hui Zhang
- Wuhu Maternity & Child Health Care Hospital, Wuhu, Anhui, China
| | - Yang Yu
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, Hefei, Anhui, China
| | - Yu-Hui Wan
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, Hefei, Anhui, China; Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei 230032, Anhui, China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, Anhui Medical University, No 81 Meishan Road, Hefei 230032, Anhui, China
| | - Fang-Biao Tao
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, Hefei, Anhui, China; Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei 230032, Anhui, China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, Anhui Medical University, No 81 Meishan Road, Hefei 230032, Anhui, China
| | - Ying Sun
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, Hefei, Anhui, China; Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei 230032, Anhui, China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, Anhui Medical University, No 81 Meishan Road, Hefei 230032, Anhui, China.
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16
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Nolé ML, Higuera-Trujillo JL, Llinares C. Effects of Classroom Design on the Memory of University Students: From a Gender Perspective. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18179391. [PMID: 34501981 PMCID: PMC8431349 DOI: 10.3390/ijerph18179391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 08/26/2021] [Accepted: 09/03/2021] [Indexed: 11/18/2022]
Abstract
Classroom design has important effects on the cognitive functions of students. However, this relationship has rarely been analysed in terms of gender. The aim of the present study, therefore, is to analyse the influence of different design variables (classroom geometry, wall colour, and artificial lighting) on university students’ memories from a gender perspective. To do so, 100 university students performed a memory task while visualising different design configurations using a virtual reality setup. Key results show that certain parameters, such as 5.23 m classroom width, 10,500 Kelvin lighting colour temperature, or the blue hue on the walls influence men and women in a similar way, while a purple hue or walls with low colour saturation can generate significantly different behaviour, especially in cognitive processes such as short-term memory. In this study, the use of virtual reality proved to be a useful tool to explore the design effects of virtual learning environments, increasingly present due to training trends and catalysed by the 2020 pandemic. This is a turning point and an international novelty as it will enable the design of classrooms (both physical and virtual) that maximise the cognitive functions of learners, regardless of gender.
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Affiliation(s)
- María Luisa Nolé
- Institute for Research and Innovation in Bioengineering (i3B), Universitat Politècnica de València, 46022 Valencia, Spain
| | - Juan Luis Higuera-Trujillo
- Institute for Research and Innovation in Bioengineering (i3B), Universitat Politècnica de València, 46022 Valencia, Spain
| | - Carmen Llinares
- Institute for Research and Innovation in Bioengineering (i3B), Universitat Politècnica de València, 46022 Valencia, Spain
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17
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Taillard J, Gronfier C, Bioulac S, Philip P, Sagaspe P. Sleep in Normal Aging, Homeostatic and Circadian Regulation and Vulnerability to Sleep Deprivation. Brain Sci 2021; 11:1003. [PMID: 34439622 PMCID: PMC8392749 DOI: 10.3390/brainsci11081003] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 07/23/2021] [Accepted: 07/25/2021] [Indexed: 12/30/2022] Open
Abstract
In the context of geriatric research, a growing body of evidence links normal age-related changes in sleep with many adverse health outcomes, especially a decline in cognition in older adults. The most important sleep alterations that continue to worsen after 60 years involve sleep timing, (especially early wake time, phase advance), sleep maintenance (continuity of sleep interrupted by numerous awakenings) and reduced amount of sigma activity (during non-rapid eye movement (NREM) sleep) associated with modifications of sleep spindle characteristics (density, amplitude, frequency) and spindle-Slow Wave coupling. After 60 years, there is a very clear gender-dependent deterioration in sleep. Even if there are degradations of sleep after 60 years, daytime wake level and especially daytime sleepiness is not modified with age. On the other hand, under sleep deprivation condition, older adults show smaller cognitive impairments than younger adults, suggesting an age-related lower vulnerability to extended wakefulness. These sleep and cognitive age-related modifications would be due to a reduced homeostatic drive and consequently a reduced sleep need, an attenuation of circadian drive (reduction of sleep forbidden zone in late afternoon and wake forbidden zone in early morning), a modification of the interaction of the circadian and homeostatic processes and/or an alteration of subcortical structures involved in generation of circadian and homeostatic drive, or connections to the cerebral cortex with age. The modifications and interactions of these two processes with age are still uncertain, and still require further investigation. The understanding of the respective contribution of circadian and homeostatic processes in the regulation of neurobehavioral function with aging present a challenge for improving health, management of cognitive decline and potential early chronobiological or sleep-wake interventions.
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Affiliation(s)
- Jacques Taillard
- Sommeil, Addiction et Neuropsychiatrie, Université de Bordeaux, SANPSY, USR 3413, F-33000 Bordeaux, France; (S.B.); (P.P.); (P.S.)
- CNRS, SANPSY, USR 3413, F-33000 Bordeaux, France
| | - Claude Gronfier
- Lyon Neuroscience Research Center (CRNL), Integrative Physiology of the Brain Arousal Systems (Waking) Team, Inserm UMRS 1028, CNRS UMR 5292, Université Claude Bernard Lyon 1, Université de Lyon, F-69000 Lyon, France;
| | - Stéphanie Bioulac
- Sommeil, Addiction et Neuropsychiatrie, Université de Bordeaux, SANPSY, USR 3413, F-33000 Bordeaux, France; (S.B.); (P.P.); (P.S.)
- CNRS, SANPSY, USR 3413, F-33000 Bordeaux, France
- Pôle Neurosciences Cliniques, CHU de Bordeaux, F-33076 Bordeaux, France
| | - Pierre Philip
- Sommeil, Addiction et Neuropsychiatrie, Université de Bordeaux, SANPSY, USR 3413, F-33000 Bordeaux, France; (S.B.); (P.P.); (P.S.)
- CNRS, SANPSY, USR 3413, F-33000 Bordeaux, France
- Pôle Neurosciences Cliniques, CHU de Bordeaux, F-33076 Bordeaux, France
| | - Patricia Sagaspe
- Sommeil, Addiction et Neuropsychiatrie, Université de Bordeaux, SANPSY, USR 3413, F-33000 Bordeaux, France; (S.B.); (P.P.); (P.S.)
- CNRS, SANPSY, USR 3413, F-33000 Bordeaux, France
- Pôle Neurosciences Cliniques, CHU de Bordeaux, F-33076 Bordeaux, France
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18
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Goudriaan I, van Boekel LC, Verbiest MEA, van Hoof J, Luijkx KG. Dementia Enlightened?! A Systematic Literature Review of the Influence of Indoor Environmental Light on the Health of Older Persons with Dementia in Long-Term Care Facilities. Clin Interv Aging 2021; 16:909-937. [PMID: 34079240 PMCID: PMC8163627 DOI: 10.2147/cia.s297865] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 03/27/2021] [Indexed: 11/23/2022] Open
Abstract
Light therapy for older persons with dementia is often administered with light boxes, even though indoor ambient light may more comfortably support the diverse lighting needs of this population. Our objective is to investigate the influence of indoor daylight and lighting on the health of older adults with dementia living in long-term care facilities. A systematic literature search was performed within PubMed, CINAHL, PsycINFO, Web of Science and Scopus databases. The included articles (n=37) were published from 1991 to 2020. These articles researched the influence of existing and changed indoor light conditions on health and resulted in seven categories of health outcomes. Although no conclusive evidence was found to support the ability of indoor light to decrease challenging behaviors or improve circadian rhythms, findings of two studies indicate that exposure to (very) cool light of moderate intensity diminished agitation. Promising effects of indoor light were to reduce depressive symptoms and facilitate spatial orientation. Furthermore, there were indications that indoor light improved one’s quality of life. Despite interventions with dynamic lighting having yielded little evidence of its efficacy, its potential has been insufficiently researched among this study population. This review provides a clear and comprehensive description of the impact of diverse indoor light conditions on the health of older adults with dementia living in long-term care facilities. Variation was seen in terms of research methods, (the description of) light conditions, and participants’ characteristics (types and severity of dementia), thus confounding the reliability of the findings. The authors recommend further research to corroborate the beneficial effects of indoor light on depression and to clarify its role in supporting everyday activities of this population. An implication for practice in long-term care facilities is raising the awareness of the increased lighting needs of aged residents.
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Affiliation(s)
- Ingrid Goudriaan
- Tranzo, Tilburg School of Social and Behavioral Sciences, Tilburg University, Tilburg, the Netherlands.,Innovation and Quality, BrabantZorg, Oss, the Netherlands
| | - Leonieke C van Boekel
- Tranzo, Tilburg School of Social and Behavioral Sciences, Tilburg University, Tilburg, the Netherlands
| | - Marjolein E A Verbiest
- Tranzo, Tilburg School of Social and Behavioral Sciences, Tilburg University, Tilburg, the Netherlands
| | - Joost van Hoof
- Chair of Urban Ageing, Faculty of Social Work & Education, The Hague University of Applied Sciences, The Hague, the Netherlands.,Institute of Spatial Management, Faculty of Environmental Engineering and Geodesy, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
| | - Katrien G Luijkx
- Tranzo, Tilburg School of Social and Behavioral Sciences, Tilburg University, Tilburg, the Netherlands
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19
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Chellappa SL, Bromundt V, Frey S, Cajochen C. Age-related neuroendocrine and alerting responses to light. GeroScience 2021; 43:1767-1781. [PMID: 33638088 DOI: 10.1007/s11357-021-00333-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Accepted: 02/01/2021] [Indexed: 11/28/2022] Open
Abstract
Aging is associated with sleep and circadian alterations, which can negatively affect quality of life and longevity. Importantly, the age-related reduction in light sensitivity, particularly in the short-wavelength range, may underlie sleep and circadian alterations in older people. While evidence suggests that non-image-forming (NIF) light responses may diminish in older individuals, most laboratory studies have low sample sizes, use non-ecological light settings (e.g., monochromatic light), and typically focus on melatonin suppression by light. Here, we investigated whether NIF light effects on endogenous melatonin levels and sleep frontal slow-wave activity (primary outcomes), and subjective sleepiness and sustained attention (secondary outcomes) attenuate with aging. We conducted a stringently controlled within-subject study with 3 laboratory protocols separated by ~ 1 week in 31 young (18-30 years; 15 women) and 16 older individuals (55-80 years; eight women). Each protocol included 2 h of evening exposure to commercially available blue-enriched polychromatic light (6500 K) or non-blue-enriched light (3000 K or 2500 K) at low levels (~ 40 lx, habitual in evening indoor settings). Aging significantly affected the influence of light on endogenous melatonin levels, subjective sleepiness, sustained attention, and frontal slow-wave activity (interaction: P < 0.001, P = 0.004, P = 0.007, P = 0.001, respectively). In young individuals, light exposure at 6500 K significantly attenuated the increase in endogenous melatonin levels, improved subjective sleepiness and sustained attention performance, and decreased frontal slow-wave activity in the beginning of sleep. Conversely, older individuals did not exhibit signficant differential light sensitivity effects. Our findings provide evidence for an association of aging and reduced light sensitivity, with ramifications to sleep, cognition, and circadian health in older people.
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Affiliation(s)
- Sarah L Chellappa
- Medical Chronobiology Program, Division of Sleep and Circadian Disorders, Brigham and Women's Hospital, 221 Longwood Avenue, 039 BLI, Boston, MA, 02115, USA. .,Division of Sleep Medicine, Harvard Medical School, Boston, MA, USA.
| | - Vivien Bromundt
- Sleep-Wake-Epilepsy-Center, Department of Neurology, Inselspital, Bern University Hospital, Bern, Switzerland.,Centre for Chronobiology, Psychiatric Hospital of the University of Basel, Transfaculty Research Platform Molecular and Cognitive Neurosciences, University of Basel, Basel, Switzerland
| | - Sylvia Frey
- Centre for Chronobiology, Psychiatric Hospital of the University of Basel, Transfaculty Research Platform Molecular and Cognitive Neurosciences, University of Basel, Basel, Switzerland
| | - Christian Cajochen
- Centre for Chronobiology, Psychiatric Hospital of the University of Basel, Transfaculty Research Platform Molecular and Cognitive Neurosciences, University of Basel, Basel, Switzerland.
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20
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Gibbison B, Keenan DM, Roelfsema F, Evans J, Phillips K, Rogers CA, Angelini GD, Lightman SL. Dynamic Pituitary-Adrenal Interactions in the Critically Ill after Cardiac Surgery. J Clin Endocrinol Metab 2020; 105:dgz206. [PMID: 31738827 PMCID: PMC7089849 DOI: 10.1210/clinem/dgz206] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 11/15/2019] [Indexed: 11/19/2022]
Abstract
CONTEXT Patients with critical illness are thought to be at risk of adrenal insufficiency. There are no models of dynamic hypothalamic-pituitary-adrenal (HPA) axis function in this group of patients and thus current methods of diagnosis are based on aggregated, static models. OBJECTIVE To characterize the secretory dynamics of the HPA axis in the critically ill (CI) after cardiac surgery. DESIGN Mathematical modeling of cohorts. SETTING Cardiac critical care unit. PATIENTS 20 male patients CI at least 48 hours after cardiac surgery and 19 healthy (H) male volunteers. INTERVENTIONS None. MAIN OUTCOME MEASURES Measures of hormone secretory dynamics were generated from serum adrenocorticotrophic hormone (ACTH) sampled every hour and total cortisol every 10 min for 24 h. RESULTS All CI patients had pulsatile ACTH and cortisol profiles. CI patients had similar ACTH secretion (1036.4 [737.6] pg/mL/24 h) compared to the H volunteers (1502.3 [1152.2] pg/mL/24 h; P = .20), but increased cortisol secretion (CI: 14 447.0 [5709.3] vs H: 5915.5 [1686.7)] nmol/L/24 h; P < .0001). This increase in cortisol was due to nonpulsatile (CI: 9253.4 [3348.8] vs H: 960 [589.0] nmol/L/24 h, P < .0001), rather than pulsatile cortisol secretion (CI: 5193.1 [3018.5] vs H: 4955.1 [1753.6] nmol/L/24 h; P = .43). Seven (35%) of the 20 CI patients had cortisol pulse nadirs below the current international guideline threshold for critical illness-related corticosteroid insufficiency, but an overall secretion that would not be considered deficient. CONCLUSIONS This study supports the premise that current tests of HPA axis function are unhelpful in the diagnosis of adrenal insufficiency in the CI. The reduced ACTH and increase in nonpulsatile cortisol secretion imply that the secretion of cortisol is driven by factors outside the HPA axis in critical illness.
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Affiliation(s)
- Ben Gibbison
- Department of Anaesthesia, Bristol Medical School, University of Bristol, Bristol, UK
| | - Daniel M Keenan
- Department of Statistics, University of Virginia, Charlottesville, VA, US
| | - Ferdinand Roelfsema
- Department of Internal Medicine, Section Endocrinology, University of Leiden, Leiden, The Netherlands
| | - Jon Evans
- Clinical Trials and Evaluation Unit, Bristol Trials Centre, University of Bristol, Bristol, UK
| | - Kirsty Phillips
- Department of Pathology, University Hospitals Bristol NHS Foundation Trust, Bristol, UK
| | - Chris A Rogers
- Clinical Trials and Evaluation Unit, Bristol Trials Centre, University of Bristol, Bristol, UK
| | - Gianni D Angelini
- Department of Cardiac Surgery, Bristol Medical School, University of Bristol, Bristol, UK
| | - Stafford L Lightman
- Henry Wellcome Laboratories for Integrative Neuroscience and Endocrinology, University of Bristol, Bristol, UK
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21
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Nishi T, Saeki K, Miyata K, Yoshikawa T, Ueda T, Kurumatani N, Obayashi K, Ogata N. Effects of Cataract Surgery on Melatonin Secretion in Adults 60 Years and Older. JAMA Ophthalmol 2020; 138:405-411. [DOI: 10.1001/jamaophthalmol.2020.0206] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Tomo Nishi
- Department of Ophthalmology, Nara Medical University School of Medicine, Nara, Japan
| | - Keigo Saeki
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan
| | - Kimie Miyata
- Department of Ophthalmology, Nara Medical University School of Medicine, Nara, Japan
| | - Tadanobu Yoshikawa
- Department of Ophthalmology, Nara Medical University School of Medicine, Nara, Japan
| | - Tetsuo Ueda
- Department of Ophthalmology, Nara Medical University School of Medicine, Nara, Japan
| | - Norio Kurumatani
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan
| | - Kenji Obayashi
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan
| | - Nahoko Ogata
- Department of Ophthalmology, Nara Medical University School of Medicine, Nara, Japan
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22
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Obayashi K, Yamagami Y, Tatsumi S, Kurumatani N, Saeki K. Indoor light pollution and progression of carotid atherosclerosis: A longitudinal study of the HEIJO-KYO cohort. ENVIRONMENT INTERNATIONAL 2019; 133:105184. [PMID: 31648154 DOI: 10.1016/j.envint.2019.105184] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 07/30/2019] [Accepted: 09/11/2019] [Indexed: 06/10/2023]
Abstract
Exposure to light at inappropriate times in relation to the solar cycle can disturb circadian endocrine and metabolic rhythms. Previous studies have suggested an association between light exposure at night (LAN) and obesity, an important risk factor of atherosclerosis, although it remains unclear whether LAN associates with progression of atherosclerosis. To evaluate the longitudinal association between bedroom LAN intensity and progression of carotid atherosclerosis, light intensity in the bedroom at baseline and carotid artery intima-media thickness (IMT) at baseline and follow-up were measured in 989 elderly participants (945 at baseline and 780 at a median follow-up time of 34 months). The mean age of the participants was 71.4 ± 6.9 years. The average mean and maximal carotid IMT at baseline were 0.88 ± 0.15 and 1.10 ± 0.32 mm, respectively. The median intensity of bedroom LAN was 0.68 lx (IQR, 0.07-3.29). In multivariable analysis adjusted for potential confounders, the highest LAN group exhibited a significant increase in mean carotid IMT (adjusted β, 0.028; 95% CI, 0.005-0.052; P = 0.019) compared with the lowest LAN quartile group. A similar relationship was found between LAN and maximal carotid IMT (adjusted β, 0.083; 95% CI, 0.037-0.129; P < 0.001). In conclusion, we found a clear and significant association between bedroom LAN intensity and progression of subclinical carotid atherosclerosis, which was independent of known risk factors for atherosclerosis, including age, obesity, smoking, economic status, hypertension, and diabetes. Indoor light pollution may be a potential risk factor for atherosclerosis in the general population.
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Affiliation(s)
- Kenji Obayashi
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan.
| | - Yuki Yamagami
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan
| | - Shinobu Tatsumi
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan; Department of Clinical Examination, Takita Hospital, Nara, Japan
| | - Norio Kurumatani
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan
| | - Keigo Saeki
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan
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23
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Yoshikawa T, Obayashi K, Miyata K, Nishi T, Ueda T, Kurumatani N, Saeki K, Ogata N. Cataracts and Subclinical Carotid Atherosclerosis in Older Adults - A Cross-Sectional Study of the HEIJO-KYO Cohort. Circ J 2019; 83:2044-2048. [PMID: 31366811 DOI: 10.1253/circj.cj-19-0118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Decreased light reception because of cataracts leads to potential circadian misalignment, resulting in exacerbation of atherosclerosis; however, little is known about the association between cataracts and atherosclerosis in populations.Methods and Results:In this cross-sectional study, cataracts were graded using slit lamp biomicroscopy with the Lens Opacities Classification System III and carotid atherosclerosis was assessed based on carotid intima-media thickness (IMT) measured using ultrasonography of the common carotid artery in 442 elderly participants (mean age, 70.0 years). Cataract was defined as nuclear cataract grade ≥3.0, cortical cataract grade ≥2.0, or posterior subcapsular cataract grade ≥2.0 in both eyes. The mean and maximal carotid IMT was 0.86±0.15 mm and 1.07±0.29 mm, respectively. In multivariable analysis adjusted for potential confounders, the mean and maximal carotid IMT were significantly greater in the cataract group than in the non-cataract group by 0.04 mm (95% confidence interval (CI), 0.01-0.06) and 0.07 mm (95% CI, 0.01-0.12), respectively. Logistic regression analysis adjusted for confounders revealed a significantly higher odds ratio for carotid atherosclerosis (maximal carotid IMT ≥1.1 mm) in the cataract group than in the non-cataract group (odds ratio, 1.78; 95% CI, 1.14-2.78). CONCLUSIONS Cataracts may be independently associated with subclinical carotid atherosclerosis in the elderly population, indicating a need for further prospective studies.
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Affiliation(s)
| | - Kenji Obayashi
- Department of Epidemiology, Nara Medical University School of Medicine
| | - Kimie Miyata
- Department of Ophthalmology, Nara Medical University School of Medicine
| | - Tomo Nishi
- Department of Ophthalmology, Nara Medical University School of Medicine
| | - Tetsuo Ueda
- Department of Ophthalmology, Nara Medical University School of Medicine
| | - Norio Kurumatani
- Department of Epidemiology, Nara Medical University School of Medicine
| | - Keigo Saeki
- Department of Epidemiology, Nara Medical University School of Medicine
| | - Nahoko Ogata
- Department of Ophthalmology, Nara Medical University School of Medicine
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Lower Incidence of In-Hospital Falls in Patients Hospitalized in Window Beds Than Nonwindow Beds. J Am Med Dir Assoc 2019; 21:476-480. [PMID: 31447262 DOI: 10.1016/j.jamda.2019.07.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 07/01/2019] [Accepted: 07/04/2019] [Indexed: 12/28/2022]
Abstract
OBJECTIVES Comparing the incidence rate of in-hospital falls between patients hospitalized in window beds and nonwindow beds. DESIGN Retrospective cohort study. SETTING A general hospital in Mie, Japan. PARTICIPANTS A total of 2767 patients (mean age, 68.4 years) hospitalized in four-bedded rooms between January 2014 and December 2016. MEASURES We identified patients' bed status (window/nonwindow) and the incidence of in-hospital falls using data on medical records and incidence reports, respectively. RESULTS During an observation period of 25,450 person-days, 57 patients had in-hospital falls (incidence rate, 2.24/1000 person-days). Incidence rate for in-hospital falls was significantly lower in the window-bed group (n = 1273) than in the nonwindow-bed group (n = 1494) [incidence rate ratio (IRR) 0.49, 95% confidence interval (CI), 0.29, 0.84]. In the multivariable analysis adjusted for age, gender, BMI, smoking and drinking habit, surgical operation during hospitalization, and independence in daily living, the window-bed group exhibited significantly lower incidence rate for in-hospital falls than the nonwindow-bed group (IRR 0.54, 95% CI 0.32, 0.93). Sensitivity analysis excluding patients aged <60 years suggested a consistent result: incidence rate for in-hospital falls was significantly lower in the window-bed group (n = 1123) than in the nonwindow-bed group (n = 925) (IRR 0.55, 95% CI 0.31, 0.95). CONCLUSIONS AND IMPLICATIONS The incidence rate of in-hospital falls was significantly lower among patients hospitalized in window beds than nonwindow beds. Hospitalization in window beds might be a novel, simple preventive option for in-hospital falls. Further large-scale, prospective, multicenter research is required.
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25
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Obayashi K, Yamagami Y, Kurumatani N, Saeki K. Bedroom lighting environment and incident diabetes mellitus: a longitudinal study of the HEIJO-KYO cohort. Sleep Med 2019; 65:1-3. [PMID: 31704511 DOI: 10.1016/j.sleep.2019.07.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2019] [Revised: 07/04/2019] [Accepted: 07/04/2019] [Indexed: 11/16/2022]
Abstract
OBJECTIVES Light information received by the brain influences human circadian timing and metabolism; low-level light at night (LAN) significantly increased body mass and led to prediabetes in mice. We hypothesized that LAN exposure increases the diabetes risk in humans. The aim of the present study was to evaluate a longitudinal association between LAN exposure and the incidence of diabetes in a general population. METHODS In our prospective cohort study, bedroom light intensity was measured at 1-min intervals in 678 elderly participants without diabetes at baseline. The average light intensity recorded between bedtimes and rise times over two consecutive nights was used in the analysis. RESULTS During follow-up (median, 42 months), 19 of the 678 participants (mean age, 70.6 years) developed diabetes. Poisson regression models revealed that the incidence rate for diabetes was significantly higher in the LAN group (average ≥ 5 lux, N = 128) than the dark group (average < 5 lux, N = 550) (incidence rate ratio, 3.74; 95% confidence interval (CI), 1.55-9.05; p = 0.003). Further propensity score adjustments in relation to LAN produced consistent results (incidence rate ratio, 3.19; 95% CI, 1.38-7.35; p = 0.007). When the cut-off value of LAN was decreased to 3 lux, the relationship remained significant (incidence rate ratio 2.74; 95% CI, 1.19-6.33; p = 0.018). CONCLUSIONS Our findings suggest that LAN exposure increases the incidence of diabetes in a general elderly population. Further research involving a large cohort with new-onset diabetes is warranted to elucidate these findings.
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Affiliation(s)
- Kenji Obayashi
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan.
| | - Yuki Yamagami
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan
| | - Norio Kurumatani
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan
| | - Keigo Saeki
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan
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26
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Yan L, Lonstein JS, Nunez AA. Light as a modulator of emotion and cognition: Lessons learned from studying a diurnal rodent. Horm Behav 2019; 111:78-86. [PMID: 30244030 PMCID: PMC6456444 DOI: 10.1016/j.yhbeh.2018.09.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 08/13/2018] [Accepted: 09/17/2018] [Indexed: 01/03/2023]
Abstract
Light profoundly affects the behavior and physiology of almost all animals, including humans. One such effect in humans is that the level of illumination during the day positively contributes to affective well-being and cognitive function. However, the neural mechanisms underlying the effects of daytime light intensity on affect and cognition are poorly understood. One barrier for progress in this area is that almost all laboratory animal models studied are nocturnal. There are substantial differences in how light affects nocturnal and diurnal species, e.g., light induces sleep in nocturnal mammals but wakefulness in diurnal ones, like humans. Therefore, the mechanisms through which light modulates affect and cognition must differ between the chronotypes. To further understand the neural pathways mediating how ambient light modulates affect and cognition, our recent work has developed a diurnal rodent model, the Nile grass rat (Arvicanthis niloticus), in which daytime light intensity is chronically manipulated in grass rats housed under the same 12:12 hour light/dark cycle. This simulates lighting conditions during summer-like bright sunny days vs. winter-like dim cloudy days. Our work has revealed that chronic dim daylight intensity results in higher depression- and anxiety-like behaviors, as well as impaired spatial learning and memory. Furthermore, we have found that hypothalamic orexin is a mediator of these effects. A better understanding of how changes in daytime light intensity impinge upon the neural substrates involved in affect and cognition will lead to novel preventive and therapeutic strategies for seasonal affective disorder, as well as for non-seasonal emotional or cognitive impairments associated with light deficiency.
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Affiliation(s)
- Lily Yan
- Department of Psychology & Neuroscience Program, Michigan State University, East Lansing, MI 48824, USA.
| | - Joseph S Lonstein
- Department of Psychology & Neuroscience Program, Michigan State University, East Lansing, MI 48824, USA
| | - Antonio A Nunez
- Department of Psychology & Neuroscience Program, Michigan State University, East Lansing, MI 48824, USA
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27
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Marek V, Potey A, Réaux-Le-Goazigo A, Reboussin E, Charbonnier A, Villette T, Baudouin C, Rostène W, Denoyer A, Mélik Parsadaniantz S. Blue light exposure in vitro causes toxicity to trigeminal neurons and glia through increased superoxide and hydrogen peroxide generation. Free Radic Biol Med 2019; 131:27-39. [PMID: 30496813 DOI: 10.1016/j.freeradbiomed.2018.11.029] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 11/22/2018] [Accepted: 11/22/2018] [Indexed: 01/08/2023]
Abstract
Today the noxiousness of blue light from natural and particularly artificial (fluorescent tubes, LED panels, visual displays) sources is actively discussed in the context of various ocular diseases. Many of them have an important neurologic component and are associated with ocular pain. This neuropathic signal is provided by nociceptive neurons from trigeminal ganglia. However, the phototoxicity of blue light on trigeminal neurons has not been explored so far. The aim of the present in vitro study was to investigate the cytotoxic impact of various wavebands of visible light (410-630 nm) on primary cell culture of mouse trigeminal neural and glial cells. Three-hour exposure to narrow wavebands of blue light centered at 410, 440 and 480 nm of average 1.1 mW/cm2 irradiance provoked cell death, altered cell morphology and induced oxidative stress and inflammation. These effects were not observed for other tested visible wavebands. We observed that neurons and glial cells processed the light signal in different manner, in terms of resulting superoxide and hydrogen peroxide generation, inflammatory biomarkers expression and phototoxic mitochondrial damage. We analyzed the pathways of photic signal reception, and we proposed that, in trigeminal cells, in addition to widely known mitochondria-mediated light absorption, light could be received by means of non-visual opsins, melanopsin (opn4) and neuropsin (opn5). We also investigated the mechanisms underlying the observed phototoxicity, further suggesting an important role of the endoplasmic reticulum in neuronal transmission of blue-light-toxic message. Taken together, our results give some insight into circuit of tangled pain and photosensitivity frequently observed in patients consulting for these ocular symptoms.
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Affiliation(s)
- V Marek
- R&D, Essilor International, Paris, France; Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France.
| | - A Potey
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | | | - E Reboussin
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - A Charbonnier
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - T Villette
- R&D, Essilor International, Paris, France
| | - C Baudouin
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France; Centre Hospitalier Nationale d'Ophtalmologie des Quinze-Vingts, Paris, France; Versailles-Saint-Quentin-en-Yvelines Université, Versailles, France
| | - W Rostène
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - A Denoyer
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France; Centre Hospitalier Nationale d'Ophtalmologie des Quinze-Vingts, Paris, France; CHU Robert Debré, Université Reims Champagne-Ardenne, Reims, France
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28
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Yoshikawa T, Obayashi K, Miyata K, Nishi T, Ueda T, Kurumatani N, Saeki K, Ogata N. Diminished circadian blood pressure variability in elderly individuals with nuclear cataracts: cross-sectional analysis in the HEIJO-KYO cohort. Hypertens Res 2018; 42:204-210. [PMID: 30459460 DOI: 10.1038/s41440-018-0140-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 07/01/2018] [Accepted: 07/09/2018] [Indexed: 11/09/2022]
Abstract
The present study aimed to determine the relationship between cataract subtypes and circadian blood pressure (BP) variability in elderly individuals. In this cross-sectional study of a community-based cohort, we assessed bilateral lens opacity using slit lamp photographs of 458 elderly individuals (mean age, 69.1 years). Cataract status was defined as a bilateral Lens Opacities Classification System III grade of ≥3 for nuclear cataract, ≥2 for cortical cataract, and ≥2 for posterior subcapsular cataract (PSC). Ambulatory BP monitoring was performed at 30-min intervals for 48 h. A nondipper pattern of BP was defined as a <10% decline in the mean nighttime systolic BP relative to the mean daytime systolic BP. The prevalence of nondipper patterns was 42.4% and 25.9% in the groups with nuclear cataracts (n = 66) and without cataracts for both eyes (n = 290), respectively. Multivariable logistic regression analysis adjusted for potential confounders revealed a significantly higher odds ratio (OR) for nondipper pattern in the group with nuclear cataract than in that without cataract (OR, 1.81; 95% confidence interval, 1.01-3.24; P = 0.047) but not in the group with cortical cataract (P = 0.61) or PSC (P = 0.95). In conclusion, circadian BP variability was significantly diminished in elderly individuals with nuclear cataracts but not in those with cortical cataracts or PSCs. These associations were independent of daytime light exposure, physical activity, and known risk factors of cataracts, such as aging, obesity, and diabetes.
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Affiliation(s)
- Tadanobu Yoshikawa
- Department of Ophthalmology, Nara Medical University School of Medicine, Nara, Japan
| | - Kenji Obayashi
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan.
| | - Kimie Miyata
- Department of Ophthalmology, Nara Medical University School of Medicine, Nara, Japan
| | - Tomo Nishi
- Department of Ophthalmology, Nara Medical University School of Medicine, Nara, Japan
| | - Tetsuo Ueda
- Department of Ophthalmology, Nara Medical University School of Medicine, Nara, Japan
| | - Norio Kurumatani
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan
| | - Keigo Saeki
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan
| | - Nahoko Ogata
- Department of Ophthalmology, Nara Medical University School of Medicine, Nara, Japan
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29
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Daneault V, Dumont M, Massé É, Forcier P, Boré A, Lina JM, Doyon J, Vandewalle G, Carrier J. Plasticity in the Sensitivity to Light in Aging: Decreased Non-visual Impact of Light on Cognitive Brain Activity in Older Individuals but No Impact of Lens Replacement. Front Physiol 2018; 9:1557. [PMID: 30459639 PMCID: PMC6232421 DOI: 10.3389/fphys.2018.01557] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 10/17/2018] [Indexed: 11/29/2022] Open
Abstract
Beyond its essential visual role, light, and particularly blue light, has numerous non-visual effects, including stimulating cognitive functions and alertness. Non-visual effects of light may decrease with aging and contribute to cognitive and sleepiness complaints in aging. However, both the brain and the eye profoundly change in aging. Whether the stimulating effects light on cognitive brain functions varies in aging and how ocular changes may be involved is not established. We compared the impact of blue and orange lights on non-visual cognitive brain activity in younger (23.6 ± 2.5 years), and older individuals with their natural lenses (NL; 66.7 ± 5.1 years) or with intraocular lens (IOL) replacement following cataract surgery (69.6 ± 4.9 years). Analyses reveal that blue light modulates executive brain responses in both young and older individuals. Light effects were, however, stronger in young individuals including in the hippocampus and frontal and cingular cortices. Light effects did not significantly differ between older-IOL and older-NL while regression analyses indicated that differential brain engagement was not underlying age-related differences in light effects. These findings show that, although its impact decreases, light can stimulate cognitive brain activity in aging. Since lens replacement did not affect light impact, the brain seems to adapt to the progressive decrease in retinal light exposure in aging.
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Affiliation(s)
- Véronique Daneault
- Functional Neuroimaging Unit, University of Montreal Geriatric Institute, Montreal, QC, Canada.,Center for Advanced Research in Sleep Medicine, CIUSSS-NÎM - Hôpital du Sacré-Cœur de Montréal, Montreal, QC, Canada.,Department of Psychology, University of Montreal, Montreal, QC, Canada
| | - Marie Dumont
- Center for Advanced Research in Sleep Medicine, CIUSSS-NÎM - Hôpital du Sacré-Cœur de Montréal, Montreal, QC, Canada.,Department of Psychiatry, University of Montreal, Montreal, QC, Canada
| | - Éric Massé
- Functional Neuroimaging Unit, University of Montreal Geriatric Institute, Montreal, QC, Canada.,Center for Advanced Research in Sleep Medicine, CIUSSS-NÎM - Hôpital du Sacré-Cœur de Montréal, Montreal, QC, Canada
| | - Pierre Forcier
- École d'Optométrie, University of Montreal, Montreal, QC, Canada
| | - Arnaud Boré
- Functional Neuroimaging Unit, University of Montreal Geriatric Institute, Montreal, QC, Canada
| | - Jean-Marc Lina
- Center for Advanced Research in Sleep Medicine, CIUSSS-NÎM - Hôpital du Sacré-Cœur de Montréal, Montreal, QC, Canada.,Génie Électrique, École de technologie supérieure, Montreal, QC, Canada.,Centre de Recherches Mathématiques, Université de Montréal, Montreal, QC, Canada
| | - Julien Doyon
- Functional Neuroimaging Unit, University of Montreal Geriatric Institute, Montreal, QC, Canada.,Department of Psychology, University of Montreal, Montreal, QC, Canada
| | - Gilles Vandewalle
- GIGA-Institute, Cyclotron Research Centre-In Vivo Imaging, University of Liège, Liège, Belgium
| | - Julie Carrier
- Functional Neuroimaging Unit, University of Montreal Geriatric Institute, Montreal, QC, Canada.,Center for Advanced Research in Sleep Medicine, CIUSSS-NÎM - Hôpital du Sacré-Cœur de Montréal, Montreal, QC, Canada.,Department of Psychology, University of Montreal, Montreal, QC, Canada
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30
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Ko GYP. Circadian regulation in the retina: From molecules to network. Eur J Neurosci 2018; 51:194-216. [PMID: 30270466 DOI: 10.1111/ejn.14185] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 08/16/2018] [Accepted: 08/20/2018] [Indexed: 12/14/2022]
Abstract
The mammalian retina is the most unique tissue among those that display robust circadian/diurnal oscillations. The retina is not only a light sensing tissue that relays light information to the brain, it has its own circadian "system" independent from any influence from other circadian oscillators. While all retinal cells and retinal pigment epithelium (RPE) possess circadian oscillators, these oscillators integrate by means of neural synapses, electrical coupling (gap junctions), and released neurochemicals (such as dopamine, melatonin, adenosine, and ATP), so the whole retina functions as an integrated circadian system. Dysregulation of retinal clocks not only causes retinal or ocular diseases, it also impacts the circadian rhythm of the whole body, as the light information transmitted from the retina entrains the brain clock that governs the body circadian rhythms. In this review, how circadian oscillations in various retinal cells are integrated, and how retinal diseases affect daily rhythms.
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Affiliation(s)
- Gladys Y-P Ko
- Department of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas.,Texas A&M Institute for Neuroscience, Texas A&M University, College Station, Texas
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31
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Martinez-Nicolas A, Madrid JA, García FJ, Campos M, Moreno-Casbas MT, Almaida-Pagán PF, Lucas-Sánchez A, Rol MA. Circadian monitoring as an aging predictor. Sci Rep 2018; 8:15027. [PMID: 30301951 PMCID: PMC6177481 DOI: 10.1038/s41598-018-33195-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Accepted: 09/25/2018] [Indexed: 12/14/2022] Open
Abstract
The ageing process is associated with sleep and circadian rhythm (SCR) frailty, as well as greater sensitivity to chronodisruption. This is essentially due to reduced day/night contrast, decreased sensitivity to light, napping and a more sedentary lifestyle. Thus, the aim of this study is to develop an algorithm to identify a SCR phenotype as belonging to young or aged subjects. To do this, 44 young and 44 aged subjects were recruited, and their distal skin temperature (DST), activity, body position, light, environmental temperature and the integrated variable TAP rhythms were recorded under free-living conditions for five consecutive workdays. Each variable yielded an individual decision tree to differentiate between young and elderly subjects (DST, activity, position, light, environmental temperature and TAP), with agreement rates of between 76.1% (light) and 92% (TAP). These decision trees were combined into a unique decision tree that reached an agreement rate of 95.3% (4 errors out of 88, all of them around the cut-off point). Age-related SCR changes were very significant, thus allowing to discriminate accurately between young and aged people when implemented in decision trees. This is useful to identify chronodisrupted populations that could benefit from chronoenhancement strategies.
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Affiliation(s)
- A Martinez-Nicolas
- Chronobiology Lab, Department of Physiology, College of Biology, University of Murcia, Mare Nostrum Campus, IUIE, IMIB-Arrixaca, Murcia, Spain
- Ciber Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain
| | - J A Madrid
- Chronobiology Lab, Department of Physiology, College of Biology, University of Murcia, Mare Nostrum Campus, IUIE, IMIB-Arrixaca, Murcia, Spain
- Ciber Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain
| | - F J García
- Ciber Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain
- Geriatrics Section, Hospital Virgen del Valle, Toledo, Spain
| | - M Campos
- Department of Computer Science and Systems, University of Murcia, IMIB-Arrixaca, Murcia, Spain
| | - M T Moreno-Casbas
- Ciber Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain
- Nursing and Healthcare Research Unit (Investén-isciii), Madrid, Spain
| | - P F Almaida-Pagán
- Chronobiology Lab, Department of Physiology, College of Biology, University of Murcia, Mare Nostrum Campus, IUIE, IMIB-Arrixaca, Murcia, Spain
- Ciber Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain
| | - A Lucas-Sánchez
- Chronobiology Lab, Department of Physiology, College of Biology, University of Murcia, Mare Nostrum Campus, IUIE, IMIB-Arrixaca, Murcia, Spain
- Ciber Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain
| | - M A Rol
- Chronobiology Lab, Department of Physiology, College of Biology, University of Murcia, Mare Nostrum Campus, IUIE, IMIB-Arrixaca, Murcia, Spain.
- Ciber Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain.
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32
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Marek V, Mélik-Parsadaniantz S, Villette T, Montoya F, Baudouin C, Brignole-Baudouin F, Denoyer A. Blue light phototoxicity toward human corneal and conjunctival epithelial cells in basal and hyperosmolar conditions. Free Radic Biol Med 2018; 126:27-40. [PMID: 30040995 DOI: 10.1016/j.freeradbiomed.2018.07.012] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 06/12/2018] [Accepted: 07/19/2018] [Indexed: 12/28/2022]
Abstract
AIMS The ocular surface is the very first barrier between the visual system and external environment. It protects the eye from the exposure to various light sources that significantly emit in blue spectrum. However, the impact of blue light on the ocular surface has been poorly explored so far. In this study, we investigated in vitro the phototoxicity of blue light illumination in human epithelial cells of the ocular surface. We worked either in basal conditions or under hyperosmolar stress, in order to mimic dry eye disease (DED) that is the most common disease involving the ocular surface. RESULTS Corneal and conjunctival epithelial cells suffered the most from violet-blue light but also from longer-wave blue light. Exposure to blue wavebands significantly decreased cellular viability, impacted on cellular morphology and provoked reactive oxygen species (ROS) over-production. Conjunctival epithelial cell line had a greater photosensitivity than the corneal epithelial one. Hyperosmolar stress potentiated the blue light phototoxicity, increasing inflammation, altering mitochondrial membrane potential, and triggering the glutathione-based antioxidant system. INNOVATION In human epithelial corneal and conjunctival cells of the ocular surface, we demonstrated the harmful impact of blue light on viability, redox state and inflammation processes, which was modified by hyperosmolarity. CONCLUSION Blue light induced cell death and significant ROS production, and altered the expression of inflammatory genes and operation of the cellular defensive system. We established for the first time that hyperosmolar stress impacted phototoxicity, further suggesting that DED patients might be more sensitive to blue light ocular toxicity.
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Affiliation(s)
- Veronika Marek
- Essilor International, R&D Department, Paris, France; Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France.
| | | | | | - Fanny Montoya
- Essilor International, R&D Department, Paris, France
| | - Christophe Baudouin
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France; Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, Paris, France; Versailles-Saint-Quentin-en-Yvelines Université, Versailles, France
| | - Françoise Brignole-Baudouin
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France; Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, Paris, France; Sorbonne Paris Cité - Paris Descartes Université, Faculté de Pharmacie de Paris, Département de Toxicologie, Paris, France
| | - Alexandre Denoyer
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France; Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, Paris, France; CHU Robert Debré, Université Reims Champagne-Ardenne, Reims, France
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33
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Suh YW, Na KH, Ahn SE, Oh J. Effect of Ambient Light Exposure on Ocular Fatigue during Sleep. J Korean Med Sci 2018; 33:e248. [PMID: 30224909 PMCID: PMC6137029 DOI: 10.3346/jkms.2018.33.e248] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 04/04/2018] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND To investigate the influence of nocturnal ambient light on visual function and ocular fatigue. METHODS Sixty healthy subjects (30 men and 30 women) aged 19 through 29 years with no history of ocular disease were recruited. All subjects spent 3 consecutive nights in the sleep laboratory. During the first and second nights, the subjects were not exposed to light during sleep, but during the third night, they were exposed to ambient light, measuring 5 or 10 lux at the eye level, which was randomly allocated with 30 subjects each. The visual function and ocular fatigue were assessed at 7 a.m. on the 3rd and 4th mornings, using best-corrected visual acuity, refractive error, conjunctival hyperemia, tear break-up time, maximal blinking interval, ocular surface temperature, and subjective symptoms reported on a questionnaire. RESULTS Three men and three women subjects failed to complete the study (4 in the 5 lux; 2 from the 10 lux). For the entire 54 subjects, tear break-up time and maximal blinking interval decreased (P = 0.015; 0.010, respectively), and nasal and temporal conjunctival hyperemia increased significantly after sleep under any ambient light (P < 0.001; 0.021, respectively). Eye tiredness and soreness also increased (P = 0.004; 0.024, respectively). After sleep under 5 lux light, only nasal conjunctival hyperemia increased significantly (P = 0.008). After sleep under 10 lux light, nasal and temporal conjunctival hyperemia, eye tiredness, soreness, difficulty in focusing, and ocular discomfort increased significantly (P < 0.05). CONCLUSION Nocturnal ambient light exposure increases ocular fatigue. Avoiding ambient light during sleep could be recommended to prevent ocular fatigue.
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Affiliation(s)
- Young-Woo Suh
- Department of Ophthalmology, Korea University College of Medicine, Seoul, Korea
| | - Kun-Hoo Na
- Department of Ophthalmology, Yeoncheon-gun Health Center and County Hospital, Yeoncheon, Korea
| | | | - Jaeryung Oh
- Department of Ophthalmology, Korea University College of Medicine, Seoul, Korea
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Sun Q, Ji X, Zhou W, Liu J. Sleep problems in shift nurses: A brief review and recommendations at both individual and institutional levels. J Nurs Manag 2018; 27:10-18. [PMID: 30171641 DOI: 10.1111/jonm.12656] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 04/16/2018] [Accepted: 04/25/2018] [Indexed: 12/14/2022]
Abstract
AIMS The purposes of this article are (a) to review briefly the current literature on shift nurses' sleep patterns, sleep quality, and the existing interventions implemented in nursing settings; and (b) to propose solutions that target individual nurses, nurse managers, and health care organisations to improve sleep health in shift nurses. BACKGROUND Sleep problems among shift nurses have been recognized increasingly as a significant issue at both the individual and organisational levels. However, the solutions are not well known. DESIGN Narrative review. METHODS A literature search was conducted using the following databases: CINAHL, PubMed, Embase, and Google Scholar from 1986 to 2016, to include original papers that reported studies on shift nurses' sleep problems and interventions. RESULTS Thirteen papers were included in this review, which all indicated associations between shift nurses' sleep problems and current intervention practices. Despite the higher prevalence of sleep problems in shift nurses compared to the general population, current interventional practices only focus on bright-light exposure, nap breaks, shift schedule rearrangement, and behavioural interventions. CONCLUSIONS To address shift nurses' poor sleep quality, we proposed two levels of approach for consideration-the individual level and the management/institutional level. The recommendations include: improving sleep hygiene; providing a low-stimulation sleep environment; conducting rigorous intervention studies to evaluate the effectiveness of a variety of therapies to deal with shift nurses' sleep disturbances; increasing awareness of sleep health of shift nurses; establishing a flexible rotating work schedule; and putting in place policies such as a 15-30 min nap break, social support, and a suitable working environment. IMPLICATIONS FOR NURSING MANAGEMENT With better awareness and understanding of shift nurses' sleep behaviours, effective interventions can be employed to improve shift nurses' sleep patterns and sleep quality to promote better emotional and health outcomes.
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Affiliation(s)
- Qiuzi Sun
- School of Nursing, University of Pennsylvania, Philadelphia, Pennsylvania.,Department of Nursing Administration, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xiaopeng Ji
- School of Nursing, University of Pennsylvania, Philadelphia, Pennsylvania.,School of Nursing, University of Delaware, Newark, Delaware
| | - Wenqin Zhou
- Department of Nursing Administration, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jianghong Liu
- School of Nursing, University of Pennsylvania, Philadelphia, Pennsylvania
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Lin H, Zhang L, Lin D, Chen W, Zhu Y, Chen C, Chan KC, Liu Y, Chen W. Visual Restoration after Cataract Surgery Promotes Functional and Structural Brain Recovery. EBioMedicine 2018; 30:52-61. [PMID: 29548900 PMCID: PMC5952227 DOI: 10.1016/j.ebiom.2018.03.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Revised: 03/01/2018] [Accepted: 03/04/2018] [Indexed: 01/19/2023] Open
Abstract
Background Visual function and brain function decline concurrently with aging. Notably, cataract patients often present with accelerated age-related decreases in brain function, but the underlying mechanisms are still unclear. Optical structures of the anterior segment of the eyes, such as the lens and cornea, can be readily reconstructed to improve refraction and vision quality. However, the effects of visual restoration on human brain function and structure remain largely unexplored. Methods A prospective, controlled clinical trial was conducted. Twenty-six patients with bilateral age-related cataracts (ARCs) who underwent phacoemulsification and intraocular lens implantation and 26 healthy controls without ARC, matched for age, sex, and education, were recruited. Visual functions (including visual acuity, visual evoke potential, and contrast sensitivity), the Mini-Mental State Examination and functional magnetic resonance imaging (including the fractional amplitude of low-frequency fluctuations and grey matter volume variation) were assessed for all the participants and reexamined for ARC patients after cataract surgery. This trial was registered with ClinicalTrials.gov (NCT02644720). Findings Compared with the healthy controls, the ARC patients presented decreased brain functionality as well as structural alterations in visual and cognitive-related brain areas preoperatively. Three months postoperatively, significant functional improvements were observed in the visual and cognitive-related brain areas of the patients. Six months postoperatively, the patients' grey matter volumes in these areas were significantly increased. Notably, both the function and structure in the visual and cognitive-related brain areas of the patients improved significantly and became comparable to those of the healthy controls 6 months postoperatively. Interpretation We demonstrated that ocular reconstruction can functionally and structurally reverse cataract-induced brain changes. The integrity of the eye is essential for maintaining the structure and function of the brain within and beyond the primary visual pathway. Cataract patients with reduced visual function presented a simultaneous decrease in brain function and grey matter volume. Cataract surgery can reverse cerebral changes in both visual and cognitive-related regions associated with visual decline. The integrity of the eye is essential for maintaining the structure and function of the brain.
The eyes and brain are anatomically and functionally connected. Age related cataract (ARC) is associated with structural and functional impairments of the brain. However, whether these changes are reversible after cataract surgery is largely unknown. We assessed the patients based on subjective cognitive evaluations and objective functional magnetic resonance imaging before and after surgery. Significant improvements in brain function and increases in the grey matter volumes of the visual, cognitive-related, and somatosensory brain areas were observed, demonstrating that the impaired brain function and structure of ARC patients can be reversed after restoration of visual acuity.
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Affiliation(s)
- Haotian Lin
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, Guangdong 510060, People's Republic of China.
| | - Li Zhang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, Guangdong 510060, People's Republic of China; Department of Ophthalmology, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430014, People's Republic of China
| | - Duoru Lin
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, Guangdong 510060, People's Republic of China
| | - Wan Chen
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, Guangdong 510060, People's Republic of China
| | - Yi Zhu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, Guangdong 510060, People's Republic of China; Department of Molecular and Cellular Pharmacology, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Chuan Chen
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, Guangdong 510060, People's Republic of China; Department of Molecular and Cellular Pharmacology, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Kevin C Chan
- NYU Eye Center, Department of Ophthalmology, NYU School of Medicine, NYU Langone Health, New York University, New York, NY 10016, USA; Department of Radiology, NYU School of Medicine, NYU Langone Health, New York University, New York, NY 10016, USA
| | - Yizhi Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, Guangdong 510060, People's Republic of China.
| | - Weirong Chen
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, Guangdong 510060, People's Republic of China.
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Obayashi K, Saeki K, Kurumatani N. Bedroom Light Exposure at Night and the Incidence of Depressive Symptoms: A Longitudinal Study of the HEIJO-KYO Cohort. Am J Epidemiol 2018; 187:427-434. [PMID: 28992236 DOI: 10.1093/aje/kwx290] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Accepted: 04/24/2017] [Indexed: 11/14/2022] Open
Abstract
Previous studies have indicated that minimal exposure to light at night (LAN) increases depression risk, even at 5 lux, in nocturnal and diurnal mammals. Although such low-level LAN may affect human circadian physiology, the association between exposure to LAN and depressive symptoms remains uncertain. In the present study, bedroom light intensity was measured objectively, and depressive symptoms were assessed, during 2010-2014 in Nara, Japan. Of 863 participants (mean age = 71.5 years) who did not have depressive symptoms at baseline, 73 participants reported development of depressive symptoms during follow-up (median, 24 months). Compared with the "dark" group (average of <5 lux; n = 710), the LAN group (average of ≥5 lux; n = 153) exhibited a significantly higher depression risk (hazard ratio = 1.89; 95% CI: 1.13, 3.14), according to a Cox proportional hazards model adjusting for age, sex, body mass index, and economic status. Further, the significance remained in a multivariable model adjusting for hypertension, diabetes, and sleep parameters (hazard ratio = 1.72; 95% CI: 1.03, 2.89). Sensitivity analyses using bedroom light data with a cutoff value of ≥10 lux suggested consistent results. In conclusion, these results indicated that exposure to LAN in home settings was independently associated with subsequent depression risk in an elderly general population.
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Affiliation(s)
- Kenji Obayashi
- Department of Community Health and Epidemiology, Nara Medical University School of Medicine, Nara, Japan
| | - Keigo Saeki
- Department of Community Health and Epidemiology, Nara Medical University School of Medicine, Nara, Japan
| | - Norio Kurumatani
- Department of Community Health and Epidemiology, Nara Medical University School of Medicine, Nara, Japan
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te Lindert BHW, Itzhacki J, van der Meijden WP, Kringelbach ML, Mendoza J, Van Someren EJW. Bright environmental light ameliorates deficient subjective ‘liking’ in insomnia: an experience sampling study. Sleep 2018; 41:4841627. [DOI: 10.1093/sleep/zsy022] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Accepted: 02/13/2017] [Indexed: 12/20/2022] Open
Affiliation(s)
- Bart H W te Lindert
- Department of Sleep and Cognition, Netherlands Institute for Neuroscience, Amsterdam, The Netherlands
| | - Jacob Itzhacki
- Department of Sleep and Cognition, Netherlands Institute for Neuroscience, Amsterdam, The Netherlands
- Institute of Cellular and Integrative Neurosciences CNRS-UPR3212, University of Strasbourg, Strasbourg, France
| | - Wisse P van der Meijden
- Department of Sleep and Cognition, Netherlands Institute for Neuroscience, Amsterdam, The Netherlands
- Institute of Cellular and Integrative Neurosciences CNRS-UPR3212, University of Strasbourg, Strasbourg, France
- Center for Chronobiology, Psychiatric Hospital of the University of Basel, Basel, Switzerl
| | - Morten L Kringelbach
- Department of Psychiatry, Warneford Hospital, Oxford, United Kingdom
- Center for Music in the Brain (MIB), Aarhus University, Denmark
| | - Jorge Mendoza
- Institute of Cellular and Integrative Neurosciences CNRS-UPR3212, University of Strasbourg, Strasbourg, France
| | - Eus J W Van Someren
- Department of Sleep and Cognition, Netherlands Institute for Neuroscience, Amsterdam, The Netherlands
- Departments of Integrative Neurophysiology and Psychiatry, Neuroscience Campus Amsterdam, VU University and Medical Center, Amsterdam, the Netherlands
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Bauer M, Glenn T, Monteith S, Gottlieb JF, Ritter PS, Geddes J, Whybrow PC. The potential influence of LED lighting on mental illness. World J Biol Psychiatry 2018; 19:59-73. [PMID: 29251065 DOI: 10.1080/15622975.2017.1417639] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVES Two recent scientific breakthroughs may alter the treatment of mental illness, as discussed in this narrative review. The first was the invention of white light-emitting diodes (LEDs), which enabled an ongoing, rapid transition to energy-efficient LEDs for lighting, and the use of LEDs to backlight digital devices. The second was the discovery of melanopsin-expressing photosensitive retinal ganglion cells, which detect environmental irradiance and mediate non-image forming (NIF) functions including circadian entrainment, melatonin secretion, alertness, sleep regulation and the pupillary light reflex. These two breakthroughs are interrelated because unlike conventional lighting, white LEDs have a dominant spectral wavelength in the blue light range, near the peak sensitivity for the melanopsin system. METHODS Pertinent articles were identified. RESULTS Blue light exposure may suppress melatonin, increase alertness, and interfere with sleep in young, healthy volunteers and in animals. Areas of concern in mental illness include the influence of blue light on sleep, other circadian-mediated symptoms, prescribed treatments that target the circadian system, measurement using digital apps and devices, and adolescent sensitivity to blue light. CONCLUSIONS While knowledge in both fields is expanding rapidly, future developments must address the potential impact of blue light on NIF functions for healthy individuals and those with mental illness.
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Affiliation(s)
- Michael Bauer
- a Department of Psychiatry and Psychotherapy , University Hospital Carl Gustav Carus, Medical Faculty, Technische Universität Dresden , Dresden , Germany
| | - Tasha Glenn
- b ChronoRecord Association, Inc , Fullerton , CA , USA
| | - Scott Monteith
- c Michigan State University College of Human Medicine, Traverse City Campus , Traverse City , MI , USA
| | - John F Gottlieb
- d Department of Psychiatry , Feinberg School of Medicine, Northwestern University , Chicago , IL , USA
| | - Philipp S Ritter
- a Department of Psychiatry and Psychotherapy , University Hospital Carl Gustav Carus, Medical Faculty, Technische Universität Dresden , Dresden , Germany
| | - John Geddes
- e Department of Psychiatry , University of Oxford, Warneford Hospital , Oxford , UK
| | - Peter C Whybrow
- f Department of Psychiatry and Biobehavioral Sciences , Semel Institute for Neuroscience and Human Behavior, University of California Los Angeles (UCLA) , Los Angeles , CA , USA
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Zadeh RS, Shepley MM, Williams G, Chung SSE. The impact of windows and daylight on acute-care nurses' physiological, psychological, and behavioral health. HERD-HEALTH ENVIRONMENTS RESEARCH & DESIGN JOURNAL 2018; 7:35-61. [PMID: 25303426 DOI: 10.1177/193758671400700405] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
OBJECTIVE To investigate the physiological and psychological effects of windows and daylight on registered nurses. BACKGROUND To date, evidence has indicated that appropriate environmental lighting with characteristics similar to natural light can improve mood, alertness, and performance. The restorative effects of windows also have been documented. Hospital workspaces generally lack windows and daylight, and the impact of the lack of windows and daylight on healthcare employees' well being has not been thoroughly investigated. METHODS Data were collected using multiple methods with a quasi-experimental approach (i.e., biological measurements, behavioral mapping, and analysis of archival data) in an acute-care nursing unit with two wards that have similar environmental and organizational conditions, and similar patient populations and acuity, but different availability of windows in the nursing stations. RESULTS Findings indicated that blood pressure (p < 0.0001) decreased and body temperature increased (p = 0.03). Blood oxygen saturation increased (p = 0.02), but the difference was clinically insignificant. Communication (p < 0.0001) and laughter (p = 0.03) both increased, and the subsidiary behavior indicators of sleepiness and deteriorated mood (p = 0.02) decreased. Heart rate (p = 0.07), caffeine intake (p = 0.3), self-reported sleepiness (p = 0.09), and the frequency of medication errors (p = 0.14) also decreased, but insignificantly. CONCLUSIONS The findings support evidence from laboratory and field settings of the benefits of windows and daylight. A possible micro-restorative effect of windows and daylight may result in lowered blood pressure and increased oxygen saturation and a positive effect on circadian rhythms (as suggested by body temperature) and morning sleepiness. KEYWORDS Critical care/intensive care, lighting, nursing, quality care, work environment.
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Affiliation(s)
- Rana Sagha Zadeh
- CORRESPONDING AUTHOR: Rana Sagha Zadeh, Department of Design & Environmental Analysis, Cornell University, 2425 Martha Van Rensselaer Hall, Ithaca, NY, 14853, USA; ; (607) 255-1946
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Night-time activity forecast by season and weather in a longitudinal design - natural light effects on three years' rest-activity cycles in nursing home residents with dementia. Int Psychogeriatr 2017; 29:2071-2080. [PMID: 28689500 DOI: 10.1017/s1041610217001235] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
UNLABELLED Backround: Night-time agitation is a frequent symptom of dementia. It often causes nursing home admission and has been linked to circadian rhythm disturbances. A positive influence of light interventions on night-time agitation was shown in several studies. The aim of our study was to investigate whether there is a long-term association between regional weather data (as indicator for daylight availability) and 24-hour variations of motor activity. METHODS Motor activity of 20 elderly nursing home residents living with dementia was analyzed using recordings of continuously worn wrist activity monitors over a three-year period. The average recording duration was 479 ± 206 days per participant (mean ± SD). Regional cloud amount and day length data from the local weather station (latitude: 52°56'N) were included in the analysis to investigate their effects on several activity variables. RESULTS Nocturnal rest, here defined as the five consecutive hours with the least motor activity during 24 hours (L5), was the most predictable activity variable per participant. There was a significant interaction of night-time activity with day length and cloud amount (F 1,1174 = 4.39; p = 0.036). Night-time activity was higher on cloudy short days than on clear short days (p = 0.007), and it was also higher on cloudy short days than on cloudy long days (p = 0.032). CONCLUSIONS The need for sufficient zeitgeber (time cue) strength during winter time, especially when days are short and skies are cloudy, is crucial for elderly people living with dementia. Activity forecast by season and weather might be a valuable approach to anticipate adequately complementary use of electrical light and thereby foster lower night-time activity.
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Bauer M, Glenn T, Alda M, Aleksandrovich MA, Andreassen OA, Angelopoulos E, Ardau R, Ayhan Y, Baethge C, Bharathram SR, Bauer R, Baune BT, Becerra-Palars C, Bellivier F, Belmaker RH, Berk M, Bersudsky Y, Bicakci Ş, Birabwa-Oketcho H, Bjella TD, Bossini L, Cabrera J, Cheung EYW, Del Zompo M, Dodd S, Donix M, Etain B, Fagiolini A, Fountoulakis KN, Frye MA, Gonzalez-Pinto A, Gottlieb JF, Grof P, Harima H, Henry C, Isometsä ET, Janno S, Kapczinski F, Kardell M, Khaldi S, Kliwicki S, König B, Kot TL, Krogh R, Kunz M, Lafer B, Landén M, Larsen ER, Lewitzka U, Licht RW, Lopez-Jaramillo C, MacQueen G, Manchia M, Marsh W, Martinez-Cengotitabengoa M, Melle I, Meza-Urzúa F, Yee Ming M, Monteith S, Morken G, Mosca E, Munoz R, Mythri SV, Nacef F, Nadella RK, Nery FG, Nielsen RE, O'Donovan C, Omrani A, Osher Y, Østermark Sørensen H, Ouali U, Pica Ruiz Y, Pilhatsch M, Pinna M, da Ponte FDR, Quiroz D, Ramesar R, Rasgon N, Reddy MS, Reif A, Ritter P, Rybakowski JK, Sagduyu K, Scippa ÂM, Severus E, Simhandl C, Stein DJ, Strejilevich S, Subramaniam M, Sulaiman AH, Suominen K, Tagata H, Tatebayashi Y, Tondo L, Torrent C, Vaaler AE, Veeh J, Vieta E, Viswanath B, Yoldi-Negrete M, Zetin M, Zgueb Y, Whybrow PC. Solar insolation in springtime influences age of onset of bipolar I disorder. Acta Psychiatr Scand 2017; 136:571-582. [PMID: 28722128 DOI: 10.1111/acps.12772] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/16/2017] [Indexed: 01/19/2023]
Abstract
OBJECTIVE To confirm prior findings that the larger the maximum monthly increase in solar insolation in springtime, the younger the age of onset of bipolar disorder. METHOD Data were collected from 5536 patients at 50 sites in 32 countries on six continents. Onset occurred at 456 locations in 57 countries. Variables included solar insolation, birth-cohort, family history, polarity of first episode and country physician density. RESULTS There was a significant, inverse association between the maximum monthly increase in solar insolation at the onset location, and the age of onset. This effect was reduced in those without a family history of mood disorders and with a first episode of mania rather than depression. The maximum monthly increase occurred in springtime. The youngest birth-cohort had the youngest age of onset. All prior relationships were confirmed using both the entire sample, and only the youngest birth-cohort (all estimated coefficients P < 0.001). CONCLUSION A large increase in springtime solar insolation may impact the onset of bipolar disorder, especially with a family history of mood disorders. Recent societal changes that affect light exposure (LED lighting, mobile devices backlit with LEDs) may influence adaptability to a springtime circadian challenge.
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Affiliation(s)
- M Bauer
- Department of Psychiatry and Psychotherapy, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - T Glenn
- ChronoRecord Association, Fullerton, CA, USA
| | - M Alda
- Department of Psychiatry, Dalhousie University, Halifax, NS, Canada
| | | | - O A Andreassen
- NORMENT - K.G. Jebsen Centre for Psychosis Research, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - E Angelopoulos
- Department of Psychiatry, Medical School, Eginition Hospital, National and Capodistrian University of Athens, Athens, Greece
| | - R Ardau
- Section of Neurosciences and Clinical Pharmacology, Department of Biomedical Sciences, University of Cagliari, Sardinia, Italy
| | - Y Ayhan
- Department of Psychiatry, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - C Baethge
- Department of Psychiatry and Psychotherapy, University of Cologne Medical School, Cologne, Germany
| | | | - R Bauer
- Department of Psychiatry and Psychotherapy, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - B T Baune
- Department of Psychiatry, School of Medicine, University of Adelaide, Adelaide, SA, Australia
| | - C Becerra-Palars
- National Institute of Psychiatry '"Ramón de la Fuente Muñiz", Mexico City, Mexico
| | - F Bellivier
- Psychiatry and Addiction Medicine, Assistance Publique - Hôpitaux de Paris, FondaMental Foundation, INSERM UMR-S1144, Denis Diderot University, René Descartes University, Paris, France
| | - R H Belmaker
- Department of Psychiatry, Faculty of Health Sciences, Beer Sheva Mental Health Center, Ben Gurion University of the Negev, Beer Sheva, Israel
| | - M Berk
- IMPACT Strategic Research Centre, School of Medicine, Barwon Health, Deakin University, Geelong, Vic., Australia.,Department of Psychiatry, Orygen, the National Centre for Excellence in Youth Mental Health, the Centre for Youth Mental Health and the Florey Institute for Neuroscience and Mental Health, University of Melbourne, Parkville, Vic., Australia
| | - Y Bersudsky
- Department of Psychiatry, Faculty of Health Sciences, Beer Sheva Mental Health Center, Ben Gurion University of the Negev, Beer Sheva, Israel
| | - Ş Bicakci
- Department of Psychiatry, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | | | - T D Bjella
- NORMENT - K.G. Jebsen Centre for Psychosis Research, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - L Bossini
- Department of Molecular Medicine and Department of Mental Health (DAI), University of Siena and University of Siena Medical Center (AOUS), Siena, Italy
| | - J Cabrera
- Mood Disorders Clinic, Dr. Jose Horwitz Psychiatric Institute, Santiago de Chile, Chile
| | - E Y W Cheung
- Department of General Adult Psychiatry, Castle Peak Hospital, Tuen Mun, Hong Kong
| | - M Del Zompo
- Section of Neurosciences and Clinical Pharmacology, Department of Biomedical Sciences, University of Cagliari, Sardinia, Italy
| | - S Dodd
- IMPACT Strategic Research Centre, School of Medicine, Barwon Health, Deakin University, Geelong, Vic., Australia.,Department of Psychiatry, University of Melbourneo, Parkville, Vic, Australia
| | - M Donix
- Department of Psychiatry and Psychotherapy, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - B Etain
- Psychiatry and Addiction Medicine, Assistance Publique - Hôpitaux de Paris, FondaMental Foundation, INSERM UMR-S1144, Denis Diderot University, René Descartes University, Paris, France
| | - A Fagiolini
- Department of Molecular Medicine and Department of Mental Health (DAI), University of Siena and University of Siena Medical Center (AOUS), Siena, Italy
| | - K N Fountoulakis
- Division of Neurosciences, 3rd Department of Psychiatry, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - M A Frye
- Department of Psychiatry & Psychology, Mayo Clinic Depression Center, Mayo Clinic, Rochester, MN, USA
| | - A Gonzalez-Pinto
- Department of Psychiatry, University Hospital of Alava, University of the Basque Country, CIBERSAM, Vitoria, Spain
| | - J F Gottlieb
- Department of Psychiatry, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - P Grof
- Mood Disorders Center of Ottawa, University of Toronto, Toronto, ON, Canada
| | - H Harima
- Department of Psychiatry, Tokyo Metropolitan Matsuzawa Hospital, Setagaya, Tokyo, Japan
| | - C Henry
- AP-HP, Hopitaux Universitaires Henri Mondor and INSERM U955 (IMRB) and Université Paris Est and Institut Pasteur, Unité Perception et Mémoire, Paris, France
| | - E T Isometsä
- Department of Psychiatry, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.,National Institute for Health and Welfare, Helsinki, Finland
| | - S Janno
- Department of Psychiatry, University of Tartu, Tartu, Estonia
| | - F Kapczinski
- Department of Psychiatry, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - M Kardell
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - S Khaldi
- Private practice, Tunis, Tunisia
| | - S Kliwicki
- Department of Adult Psychiatry, Poznan University of Medical Sciences, Poznan, Poland
| | - B König
- BIPOLAR Zentrum Wiener Neustadt, Wiener Neustadt, Austria
| | - T L Kot
- Khanty-Mansiysk Clinical Psychoneurological Hospital, Khanty-Mansiysk, Russia
| | - R Krogh
- Department of Affective Disorders, Q, Mood Disorders Research Unit, Aarhus University Hospital, Aarhus, Denmark
| | - M Kunz
- Department of Psychiatry, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - B Lafer
- Bipolar Disorder Research Program, Department of Psychiatry, University of São Paulo Medical School, São Paulo, Brazil
| | - M Landén
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, the Sahlgrenska Academy, University of Gothenburg, Gothenburg and Mölndal, Sweden.,Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - E R Larsen
- Department of Affective Disorders, Q, Mood Disorders Research Unit, Aarhus University Hospital, Aarhus, Denmark
| | - U Lewitzka
- Department of Psychiatry and Psychotherapy, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - R W Licht
- Unit for Psychiatric Research, Aalborg University Hospital, Psychiatry, Aalborg, Denmark.,Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
| | - C Lopez-Jaramillo
- Mood Disorders Program, Hospital Universitario San Vicente Fundación, Research Group in Psychiatry, Department of Psychiatry, Faculty of Medicine, Universidad de Antioquia, Medellín, Colombia
| | - G MacQueen
- Department of Psychiatry, Faculty of Medicine, University of Calgary, Calgary, AB, Canada
| | - M Manchia
- Section of Psychiatry, Department of Medical Science and Public Health, University of Cagliari, Cagliari, Italy
| | - W Marsh
- Department of Psychiatry, University of Massachusetts, Worcester, MA, USA
| | - M Martinez-Cengotitabengoa
- Department of Psychiatry, University Hospital of Alava, University of the Basque Country, CIBERSAM, Vitoria, Spain
| | - I Melle
- NORMENT - K.G. Jebsen Centre for Psychosis Research, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - F Meza-Urzúa
- National Institute of Psychiatry '"Ramón de la Fuente Muñiz", Mexico City, Mexico
| | - M Yee Ming
- Department of General Psychiatry, Mood Disorders Unit, Institute of Mental Health, Singapore City, Singapore
| | - S Monteith
- Traverse City Campus, Michigan State University College of Human Medicine, Traverse City, MI, USA
| | - G Morken
- Department of Mental Health, Norwegian University of Science and Technology - NTNU, Trondheim, Norway.,Department of Psychiatry, St Olavs' University Hospital, Trondheim, Norway
| | - E Mosca
- Section of Neurosciences and Clinical Pharmacology, Department of Biomedical Sciences, University of Cagliari, Sardinia, Italy
| | - R Munoz
- Department of Psychiatry, University of California San Diego, San Diego, CA, USA
| | - S V Mythri
- Asha Bipolar Clinic, Asha Hospital, Hyderabad, Telangana, India
| | - F Nacef
- Razi Hospital, Faculty of Medicine, University of Tunis-El Manar, Tunis, Tunisia
| | - R K Nadella
- Department of Psychiatry, NIMHANS, Bangalore, India
| | - F G Nery
- Bipolar Disorder Research Program, Department of Psychiatry, University of São Paulo Medical School, São Paulo, Brazil
| | - R E Nielsen
- Unit for Psychiatric Research, Aalborg University Hospital, Psychiatry, Aalborg, Denmark.,Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
| | - C O'Donovan
- Department of Psychiatry, Dalhousie University, Halifax, NS, Canada
| | - A Omrani
- Tunisian Bipolar Forum, Érable Médical Cabinet 324, Tunis, Tunisia
| | - Y Osher
- Department of Psychiatry, Faculty of Health Sciences, Beer Sheva Mental Health Center, Ben Gurion University of the Negev, Beer Sheva, Israel
| | - H Østermark Sørensen
- Unit for Psychiatric Research, Aalborg University Hospital, Psychiatry, Aalborg, Denmark
| | - U Ouali
- Razi Hospital, Faculty of Medicine, University of Tunis-El Manar, Tunis, Tunisia
| | - Y Pica Ruiz
- Hospital "Ángeles del Pedregal", Mexico City, Mexico
| | - M Pilhatsch
- Department of Psychiatry and Psychotherapy, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - M Pinna
- Lucio Bini Mood Disorder Center, Cagliari, Italy
| | - F D R da Ponte
- Department of Psychiatry, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - D Quiroz
- Deparment of Psychiatry, Diego Portales University, Santiago de Chile, Chile
| | - R Ramesar
- UCT/MRC Human Genetics Research Unit, Division of Human Genetics, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - N Rasgon
- Department of Psychiatry and Behavioral Sciences, Stanford School of Medicine, Palo Alto, CA, USA
| | - M S Reddy
- Asha Bipolar Clinic, Asha Hospital, Hyderabad, Telangana, India
| | - A Reif
- Department of Psychiatry, Psychosomatic Medicine and Psychotherapy, University Hospital Frankfurt, Johann Wolfgang Goethe-Universität Frankfurt am Main, Frankfurt am Main, Germany
| | - P Ritter
- Department of Psychiatry and Psychotherapy, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - J K Rybakowski
- Department of Adult Psychiatry, Poznan University of Medical Sciences, Poznan, Poland
| | - K Sagduyu
- Department of Psychiatry, University of Missouri Kansas City School of Medicine, Kansas City, MO, USA
| | - Â M Scippa
- Department of Neuroscience and Mental Health, Federal University of Bahia, Salvador, Brazil
| | - E Severus
- Department of Psychiatry and Psychotherapy, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - C Simhandl
- BIPOLAR Zentrum Wiener Neustadt, Wiener Neustadt, Austria
| | - D J Stein
- Department of Psychiatry, MRC Unit on Risk & Resilience in Mental Disorders, University of Cape Town, Cape Town, South Africa
| | - S Strejilevich
- Bipolar Disorder Program, Neuroscience Institute, Favaloro University, Buenos Aires, Argentina
| | - M Subramaniam
- Research Division, Institute of Mental Health, Singapore City, Singapore
| | - A H Sulaiman
- Department of Psychological Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - K Suominen
- Department of Social Services and Health Care, Psychiatry, City of Helsinki, Helsinki, Finland
| | - H Tagata
- Department of Psychiatry, Tokyo Metropolitan Matsuzawa Hospital, Setagaya, Tokyo, Japan
| | - Y Tatebayashi
- Schizophrenia & Affective Disorders Research Project, Tokyo Metropolitan Institute of Medical Science, Seatagaya, Tokyo, Japan
| | - L Tondo
- McLean Hospital-Harvard Medical School, Boston, MA, USA.,Mood Disorder Lucio Bini Centers, Cagliari e Roma, Italy
| | - C Torrent
- Clinical Institute of Neuroscience, Hospital Clinic, University of Barcelona, IDIBAPS, CIBERSAM, Barcelona, Catalonia, Spain
| | - A E Vaaler
- Department of Mental Health, Norwegian University of Science and Technology - NTNU, Trondheim, Norway.,Department of Psychiatry, St Olavs' University Hospital, Trondheim, Norway
| | - J Veeh
- Department of Psychiatry, Psychosomatic Medicine and Psychotherapy, University Hospital Frankfurt, Johann Wolfgang Goethe-Universität Frankfurt am Main, Frankfurt am Main, Germany
| | - E Vieta
- Clinical Institute of Neuroscience, Hospital Clinic, University of Barcelona, IDIBAPS, CIBERSAM, Barcelona, Catalonia, Spain
| | - B Viswanath
- Department of Psychiatry, NIMHANS, Bangalore, India
| | - M Yoldi-Negrete
- Consejo Nacional de Ciencia y Tecnología - Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Ciudad de México, Mexico
| | - M Zetin
- Department of Psychology, Chapman University, Orange, CA, USA
| | - Y Zgueb
- Razi Hospital, Faculty of Medicine, University of Tunis-El Manar, Tunis, Tunisia
| | - P C Whybrow
- Department of Psychiatry and Biobehavioral Sciences, Semel Institute for Neuroscience and Human Behavior University of California Los Angeles (UCLA), Los Angeles, CA, USA
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Münch M, Ladaique M, Roemer S, Hashemi K, Kawasaki A. Melanopsin-Mediated Acute Light Responses Measured in Winter and in Summer: Seasonal Variations in Adults with and without Cataracts. Front Neurol 2017; 8:464. [PMID: 28955293 PMCID: PMC5601987 DOI: 10.3389/fneur.2017.00464] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 08/21/2017] [Indexed: 11/19/2022] Open
Abstract
Seasonal adaptation is a ubiquitous behavior seen in many species on both global hemispheres and is conveyed by changing photoperiods. In humans this seasonal adaptation is less apparent, in part because changes in daylength are masked by the use of electrical lighting at night. On the other hand, cataracts which reduce light transmission, may compound seasonal changes related to the reduced daylength of winter. To better understand the effects of different photoperiod lengths in healthy adults without and with cataracts, we tested their melanopsin-mediated light responses in summer vs. winter. Fifty-two participants (mean age 67.4 years; 30 with bilateral cataracts and 22 age-matched controls with clear lenses; pseudophakes) were tested twice, once in summer and once in winter. At each test session we assessed the electroretinogram and pupil responses during daytime and we determined melatonin suppression, subjective sleepiness and mood in response to light exposure in the evening. Circadian rest-activity cycles and sleep from activity recordings were also analyzed for both seasons. Both groups had similar visual function. There were no seasonal differences in the electroretinogram. For the pupil responses to bright blue light, the post-illumination pupil response (PIPR) was greater in winter than summer in pseudophakes, but not in cataract participants, whereas melatonin suppression to acute light exposure showed no differences between both groups and seasons. Overall, intra-daily variability of rest-activity was worse in winter but participants felt sleepier and reported worse mood at the laboratory in evening time in the summer. Those with cataracts had poorer sleep quality with lower sleep efficiency, and higher activity during sleep in winter than summer. In this study, the PIPR showed a seasonal variation in which a larger response was found during winter. This variation was only detected in participants with a clear intraocular lens. In the cataract group, visual function was not impaired yet these participants showed a lack of seasonal changes in the pupil response to blue light and poorer sleep in winter. These findings raise the question for tailored lighting conditions for cataract patients in order to counter potentially deleterious effects of living with chronically lower light exposure.
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Affiliation(s)
- Mirjam Münch
- Group Sleep Research & Clinical Chronobiology, Institute of Physiology, Charité University Médicine Berlin, Berlin, Germany
| | - Myriam Ladaique
- Hôpital Ophtalmique Jules Gonin, University of Lausanne, Lausanne, Switzerland
| | - Ségolène Roemer
- Hôpital Ophtalmique Jules Gonin, University of Lausanne, Lausanne, Switzerland
| | - Kattayoon Hashemi
- Hôpital Ophtalmique Jules Gonin, University of Lausanne, Lausanne, Switzerland
| | - Aki Kawasaki
- Hôpital Ophtalmique Jules Gonin, University of Lausanne, Lausanne, Switzerland
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43
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Tokiya M, Kaneita Y, Itani O, Jike M, Ohida T. Predictors of insomnia onset in adolescents in Japan. Sleep Med 2017; 38:37-43. [PMID: 29031754 DOI: 10.1016/j.sleep.2017.06.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Revised: 06/28/2017] [Accepted: 06/29/2017] [Indexed: 10/19/2022]
Abstract
OBJECTIVE The objective of this study was to clarify the incidence rate and predictive factors of insomnia in Japanese junior and senior high school students. METHODS We conducted a baseline survey on first year junior and senior high school students (seventh and 10th graders) throughout the nation. A follow-up survey was then conducted two years later. For both surveys, we used self-administered questionnaires inquiring about sleep, mental health status, lifestyle, participation in club activities, and study hours. RESULTS A total of 3473 students (776 junior high and 2697 senior high) were suitable for analysis. During the two years leading to the follow-up study, the incidence rate of newly developed insomnia was 7.8% among junior high and 9.2% among senior high school students. Multiple logistic regression analyses revealed that factors associated with new insomnia onset were 'sleep paralysis experience' and 'poor mental health status' in junior high school students, and 'being woken by a nightmare', 'poor mental health status', '≥2 h of extracurricular learning per day' and 'mobile phone use for ≥2 h per day' in senior high school students. CONCLUSIONS In junior and senior high school students, parasomnias such as nightmares and sleep paralysis, and mental health status can be predictors of insomnia onset. For senior high school students, longer use of mobile phones can be a predictor of insomnia onset. The present findings suggest that sleep health must be promoted among junior and senior high school students in the future.
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Affiliation(s)
- Mikiko Tokiya
- Department of Public Health and Epidemiology, Faculty of Medicine, Oita University, Oita, Japan
| | - Yoshitaka Kaneita
- Division of Public Health, Department of Social Medicine, Nihon University School of Medicine, Tokyo, Japan.
| | - Osamu Itani
- Department of Public Health and Epidemiology, Faculty of Medicine, Oita University, Oita, Japan
| | - Maki Jike
- Division of Public Health, Department of Social Medicine, Nihon University School of Medicine, Tokyo, Japan
| | - Takashi Ohida
- Division of Public Health, Department of Social Medicine, Nihon University School of Medicine, Tokyo, Japan
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Terzibasi-Tozzini E, Martinez-Nicolas A, Lucas-Sánchez A. The clock is ticking. Ageing of the circadian system: From physiology to cell cycle. Semin Cell Dev Biol 2017. [PMID: 28630025 DOI: 10.1016/j.semcdb.2017.06.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The circadian system is the responsible to organise the internal temporal order in relation to the environment of every process of the organisms producing the circadian rhythms. These rhythms have a fixed phase relationship among them and with the environment in order to optimise the available energy and resources. From a cellular level, circadian rhythms are controlled by genetic positive and negative auto-regulated transcriptional and translational feedback loops, which generate 24h rhythms in mRNA and protein levels of the clock components. It has been described about 10% of the genome is controlled by clock genes, with special relevance, due to its implications, to the cell cycle. Ageing is a deleterious process which affects all the organisms' structures including circadian system. The circadian system's ageing may produce a disorganisation among the circadian rhythms, arrhythmicity and, even, disconnection from the environment, resulting in a detrimental situation to the organism. In addition, some environmental conditions can produce circadian disruption, also called chronodisruption, which may produce many pathologies including accelerated ageing. Finally, some strategies to prevent, palliate or counteract chronodisruption effects have been proposed to enhance the circadian system, also called chronoenhancement. This review tries to gather recent advances in the chronobiology of the ageing process, including cell cycle, neurogenesis process and physiology.
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Affiliation(s)
| | - Antonio Martinez-Nicolas
- Department of Physiology, Faculty of Biology, University of Murcia, Campus Mare Nostrum, IUIE. IMIB-Arrixaca, Murcia, Spain; Ciber Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain
| | - Alejandro Lucas-Sánchez
- Department of Physiology, Faculty of Biology, University of Murcia, Campus Mare Nostrum, IUIE. IMIB-Arrixaca, Murcia, Spain; Ciber Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain.
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45
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Chen Y, Nondahl DM, Schubert CR, Dalton DS, Paulsen AJ, Klein BEK, Klein R, Cruickshanks KJ. A longitudinal population study of the impact of cataract extraction on sleep quality. COGENT MEDICINE 2017; 4. [PMID: 28584858 DOI: 10.1080/2331205x.2017.1314905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
PURPOSE To investigate the longitudinal effects of cataract extraction on sleep quality in two discrete population cohorts. METHODS 301 participants who had senile cataract in both eyes at the baseline examination were selected from two large longitudinal epidemiologic studies of age-related eye disease, hearing, olfaction, and cognition. The participants were divided into two groups: one had cataract surgery (CS) in both eyes, and the other had no cataract surgery (NCS) in either eye by the follow up examination. Cataract was graded from photos or digital images using a standardized protocol. The quality of sleep was assessed using a modified Wisconsin Sleep Cohort Study Questionnaire. The NCS and CS groups were compared as to the change in the number of sleep problems reported from the baseline to the follow-up examination. Systemic co-morbidity data were included as potential confounders, including diabetes mellitus, obesity, hypertension, cerebrovascular disease, thyroid disease, tobacco and alcohol use, and the SF-12 physical component and mental component summary scores. RESULTS The average (mean±SD) age was 71.0±8.8 years in the NCS (n=237) group and 73.4±9.1 years (n=64) in the CS group. There was no statistically significant difference in the change in the number of sleep problems reported between the NCS and CS groups (mean: -0.068 for NCS and 0.016 for CS, p=0.57). The multivariable linear regression models, when adjusted for confounders, yielded similar results. CONCLUSION In this longitudinal, community-based population study, we found no significant impact of cataract extraction on sleep quality. Studies of the effect of cataract extraction on sleep should allow a longer follow up to demonstrate sustainability.
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Affiliation(s)
- Yanjun Chen
- Department of Ophthalmology & Visual Sciences, School of Medicine and Public Health, University of Wisconsin, Madison, WI 53705, USA
| | - David M Nondahl
- Department of Ophthalmology & Visual Sciences, School of Medicine and Public Health, University of Wisconsin, Madison, WI 53705, USA
| | - Carla R Schubert
- Department of Ophthalmology & Visual Sciences, School of Medicine and Public Health, University of Wisconsin, Madison, WI 53705, USA
| | - Dayna S Dalton
- Department of Ophthalmology & Visual Sciences, School of Medicine and Public Health, University of Wisconsin, Madison, WI 53705, USA.,Department of Population Health Sciences, School of Medicine and Public Health, University of Wisconsin, Madison, WI 53726, USA
| | - Adam J Paulsen
- Department of Ophthalmology & Visual Sciences, School of Medicine and Public Health, University of Wisconsin, Madison, WI 53705, USA
| | - Barbara E K Klein
- Department of Ophthalmology & Visual Sciences, School of Medicine and Public Health, University of Wisconsin, Madison, WI 53705, USA
| | - Ronald Klein
- Department of Ophthalmology & Visual Sciences, School of Medicine and Public Health, University of Wisconsin, Madison, WI 53705, USA
| | - Karen J Cruickshanks
- Department of Ophthalmology & Visual Sciences, School of Medicine and Public Health, University of Wisconsin, Madison, WI 53705, USA.,Department of Population Health Sciences, School of Medicine and Public Health, University of Wisconsin, Madison, WI 53726, USA
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Vartanian G, Wong KY, Ku PC. LED Lights With Hidden Intensity-Modulated Blue Channels Aiming for Enhanced Subconscious Visual Responses. IEEE PHOTONICS JOURNAL 2017; 9:8201009. [PMID: 28751938 PMCID: PMC5526349 DOI: 10.1109/jphot.2017.2697974] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A new form of light-emitting diode (LED) light suitable for general illumination is proposed to enhance subconscious, nonimage-forming visual responses, which are essential to our well-being. Pulsing light has been shown to reduce photoreceptor adaptation and elicit stronger subconscious visual responses at an indoor illumination level. Using the silent substitution technique, a melanopsin-selective flicker can be added into white light. A linear optimization algorithm was developed to suppress any perceivable fluctuation of light intensity and colors of illuminated objects. Two examples of lights are given to illustrate the potential applications of the proposed multi-LED light for general illumination and therapeutic purposes.
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Affiliation(s)
- Garen Vartanian
- Macromolecular Science and Engineering Graduate Program, University
of Michigan, Ann Arbor, MI 48109 USA
| | - Kwoon Y. Wong
- Department of Ophthalmology and Visual Sciences, University of
Michigan, Ann Arbor, MI 48109 USA
| | - Pei-Cheng Ku
- Macromolecular Science and Engineering Graduate Program, University
of Michigan, Ann Arbor, MI 48109 USA
- Department of Electrical Engineering and Computer Science,
University of Michigan, Ann Arbor, MI 48109 USA
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Dubicanac M, Strueve J, Mestre-Frances N, Verdier JM, Zimmermann E, Joly M. Photoperiodic regime influences onset of lens opacities in a non-human primate. PeerJ 2017; 5:e3258. [PMID: 28484672 PMCID: PMC5420196 DOI: 10.7717/peerj.3258] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 03/30/2017] [Indexed: 11/24/2022] Open
Abstract
Background Opacities of the lens are typical age-related phenomena which have a high influence on photoreception and consequently circadian rhythm. In mouse lemurs, a small bodied non-human primate, a high incidence (more than 50% when >seven years) of cataracts has been previously described during aging. Previous studies showed that photoperiodically induced accelerated annual rhythms alter some of mouse lemurs’ life history traits. Whether a modification of photoperiod also affects the onset of age dependent lens opacities has not been investigated so far. The aim of this study was therefore to characterise the type of opacity and the mouse lemurs’ age at its onset in two colonies with different photoperiodic regimen. Methods Two of the largest mouse lemur colonies in Europe were investigated: Colony 1 having a natural annual photoperiodic regime and Colony 2 with an induced accelerated annual cycle. A slit-lamp was used to determine opacities in the lens. Furthermore, a subset of all animals which showed no opacities in the lens nucleus in the first examination but developed first changes in the following examination were further examined to estimate the age at onset of opacities. In total, 387 animals were examined and 57 represented the subset for age at onset estimation. Results The first and most commonly observable opacity in the lens was nuclear sclerosis. Mouse lemurs from Colony 1 showed a delayed onset of nuclear sclerosis compared to mouse lemurs from Colony 2 (4.35 ± 1.50 years vs. 2.75 ± 0.99 years). For colony 1, the chronological age was equivalent to the number of seasonal cycles experienced by the mouse lemurs. For colony 2, in which seasonal cycles were accelerated by a factor of 1.5, mouse lemurs had experienced 4.13 ± 1.50 seasonal cycles in 2.75 ± 0.99 chronological years. Discussion Our study showed clear differences in age at the onset of nuclear sclerosis formation between lemurs kept under different photoperiodic regimes. Instead of measuring the chronological age, the number of seasonal cycles (N = four) experienced by a mouse lemur can be used to estimate the risk of beginning nuclear sclerosis formation. Ophthalmological examinations should be taken into account when animals older than 5–6 seasonal cycles are used for experiments in which unrestricted visual ability has to be ensured. This study is the first to assess and demonstrate the influence of annual photoperiod regime on the incidence of lens opacities in a non-human primate.
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Affiliation(s)
- Marko Dubicanac
- Institute of Zoology, Tierärztliche Hochschule Hannover, Hanover, Lower Saxony, Germany
| | - Julia Strueve
- Clinic for Small Animals, Tierärztliche Hochschule Hannover, Hanover, Lower Saxony, Germany
| | - Nadine Mestre-Frances
- Department of Molecular Mechanisms in Neurodegenerative Diseases Inserm U1198, Univ. Montpellier, Montpellier, France
| | - Jean-Michel Verdier
- Department of Molecular Mechanisms in Neurodegenerative Diseases Inserm U1198, Univ. Montpellier, Montpellier, France
| | - Elke Zimmermann
- Institute of Zoology, Tierärztliche Hochschule Hannover, Hanover, Lower Saxony, Germany
| | - Marine Joly
- Centre for Comparative and Evolutionary Psychology, University of Portsmouth, Portsmouth, United Kingdom
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48
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Engwall M, Fridh I, Jutengren G, Bergbom I, Sterner A, Lindahl B. The effect of cycled lighting in the intensive care unit on sleep, activity and physiological parameters: A pilot study. Intensive Crit Care Nurs 2017; 41:26-32. [PMID: 28268055 DOI: 10.1016/j.iccn.2017.01.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Revised: 01/09/2017] [Accepted: 01/22/2017] [Indexed: 12/26/2022]
Abstract
Patients in intensive care suffer from severe illnesses or injuries and from symptoms related to care and treatments. Environmental factors, such as lighting at night, can disturb patients' circadian rhythms. The aim was to investigate whether patients displayed circadian rhythms and whether a cycled lighting intervention would impact it. In this pilot study (N=60), a cycled lighting intervention in a two-bed patient room was conducted. An ordinary hospital room functioned as the control. Patient activity, heart rate, mean arterial pressure and body temperature were recorded. All data were collected during the patients' final 24h in the intensive care unit. There was a significant difference between day and night patient activity within but not between conditions. Heart rates differed between day and night significantly for patients in the ordinary room but not in the intervention room or between conditions. Body temperature was lowest at night for all patients with no significant difference between conditions. Patients in both conditions had a natural circadian rhythm; and the cycled lighting intervention showed no significant impact. As the sample size was small, a larger repeated measures study should be conducted to determine if other types of lighting or environmental factors can impact patients' well-being.
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Affiliation(s)
- Marie Engwall
- Faculty of Caring Sciences, Work Life & Social Welfare, University of Borås, SE-50190 Borås, Sweden; Sahlgrenska Academy, Gothenburg University and the Institute of Health & Caring Sciences, Arvid Wallgrens Backe 1, SE 41346 Gothenburg, Sweden.
| | - Isabell Fridh
- Faculty of Caring Sciences, Work Life & Social Welfare, University of Borås, SE-50190 Borås, Sweden.
| | - Göran Jutengren
- Faculty of Caring Sciences, Work Life & Social Welfare, University of Borås, SE-50190 Borås, Sweden.
| | - Ingegerd Bergbom
- Faculty of Caring Sciences, Work Life & Social Welfare, University of Borås, SE-50190 Borås, Sweden; Sahlgrenska Academy, Gothenburg University and the Institute of Health & Caring Sciences, Arvid Wallgrens Backe 1, SE 41346 Gothenburg, Sweden.
| | - Anders Sterner
- Faculty of Caring Sciences, Work Life & Social Welfare, University of Borås, SE-50190 Borås, Sweden.
| | - Berit Lindahl
- Faculty of Caring Sciences, Work Life & Social Welfare, University of Borås, SE-50190 Borås, Sweden; Sahlgrenska Academy, Gothenburg University and the Institute of Health & Caring Sciences, Arvid Wallgrens Backe 1, SE 41346 Gothenburg, Sweden.
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49
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McKenna HT, Reiss IK, Martin DS. The significance of circadian rhythms and dysrhythmias in critical illness. J Intensive Care Soc 2017; 18:121-129. [PMID: 28979558 DOI: 10.1177/1751143717692603] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Many physiological and cellular processes cycle with time, with the period between one peak and the next being roughly equal to 24 h. These circadian rhythms underlie 'permissive homeostasis', whereby anticipation of periods of increased energy demand or stress may enhance the function of individual cells, organ systems or whole organisms. Many physiological variables related to survival during critical illness have a circadian rhythm, including the sleep/wake cycle, haemodynamic and respiratory indices, immunity and coagulation, but their clinical significance remains underappreciated. Critically ill patients suffer from circadian dysrhythmia, manifesting overtly as sleep disturbance and delirium, but with widespread covert effects on cellular and organ function. Environmental and pharmacological strategies that ameliorate or prevent circadian dysrhythmia have demonstrated clinical benefit. Harnessing these important biological phenomena to match metabolic supply to demand and bolster cell defenses at the apposite time may be a future therapeutic strategy in the intensive care unit.
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Affiliation(s)
- Helen T McKenna
- University College London Centre for Altitude Space and Extreme Environment Medicine, UCLH NIHR Biomedical Research Centre, Institute of Sport and Exercise Health, London, UK.,Critical Care Unit, The London Clinic, London, UK.,Intensive Care Unit, Royal Free Hospital, London, UK
| | - Irwin Km Reiss
- Division of Neonatology, Department of Paediatrics, Erasmus University Hospital, Rotterdam, the Netherlands
| | - Daniel S Martin
- University College London Centre for Altitude Space and Extreme Environment Medicine, UCLH NIHR Biomedical Research Centre, Institute of Sport and Exercise Health, London, UK.,Intensive Care Unit, Royal Free Hospital, London, UK.,University College London Division of Surgery and Interventional Science, Royal Free Hospital, London, UK
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Liu H, Zhou Q, Yang J, Jiang T, Liu Z, Li J. Intelligent Luminance Control of Lighting Systems Based on Imaging Sensor Feedback. SENSORS 2017; 17:s17020321. [PMID: 28208781 PMCID: PMC5336081 DOI: 10.3390/s17020321] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2017] [Revised: 02/01/2017] [Accepted: 02/03/2017] [Indexed: 11/16/2022]
Abstract
An imaging sensor-based intelligent Light Emitting Diode (LED) lighting system for desk use is proposed. In contrast to the traditional intelligent lighting system, such as the photosensitive resistance sensor-based or the infrared sensor-based system, the imaging sensor can realize a finer perception of the environmental light; thus it can guide a more precise lighting control. Before this system works, first lots of typical imaging lighting data of the desk application are accumulated. Second, a series of subjective and objective Lighting Effect Evaluation Metrics (LEEMs) are defined and assessed for these datasets above. Then the cluster benchmarks of these objective LEEMs can be obtained. Third, both a single LEEM-based control and a multiple LEEMs-based control are developed to realize a kind of optimal luminance tuning. When this system works, first it captures the lighting image using a wearable camera. Then it computes the objective LEEMs of the captured image and compares them with the cluster benchmarks of the objective LEEMs. Finally, the single LEEM-based or the multiple LEEMs-based control can be implemented to get a kind of optimal lighting effect. Many experiment results have shown the proposed system can tune the LED lamp automatically according to environment luminance changes.
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Affiliation(s)
- Haoting Liu
- School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China.
| | - Qianxiang Zhou
- School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China.
| | - Jin Yang
- Astronaut Research and Training Center of China, Beijing 100094, China.
| | - Ting Jiang
- Astronaut Research and Training Center of China, Beijing 100094, China.
| | - Zhizhen Liu
- Astronaut Research and Training Center of China, Beijing 100094, China.
| | - Jie Li
- Astronaut Research and Training Center of China, Beijing 100094, China.
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