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The effect of a blue enriched white light on salivary antioxidant capacity and melatonin among night shift workers: a field study
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Reza Kazemi, Rasoul Hemmatjo, Mokarami Hamidreza
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Ann Occup Environ Med 2018;30:61. Published online October 19, 2018
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DOI: https://doi.org/10.1186/s40557-018-0275-3
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Abstract
PDFPubReaderePub
- Background
Because of their positive impact on individuals’ performance and alertness, blue enriched white light sources are gaining popularity in households and industries. However, these sources of blue light spectrum may cause oxidative stress. On the other hand, there are no empirical studies investigating the negative effect of blue enriched white light on oxidative stress. Thus, the current study aimed at empirical assessment of the effect of such light sources on oxidative stress among night shift workers. MethodsThe study, which adopted a cross-sectional design, focused on 30 control room operators of a petrochemical complex. The subjects followed a shift-work schedule comprising 7 night shifts, 7 day shifts, and 7 days off. The subjects were exposed to 6500 K, 3000 K, and 17,000 K light sources (which have various degrees of blue light) during three consecutive work cycles, with each cycle lasting for 7 nights. In each light condition, three salivary measurements were conducted (at the beginning, in the middle, and at the end of the shift). The measurements were used to assess catalase (CAT), total thiol molecules (TTG), and total antioxidant capacity (TAC), and melatonin. ResultsThe results of repeated measures ANOVA showed that there was no significant difference among various light conditions with regard to salivary biomarkers (catalase, total thiol molecules, and total antioxidant capacity). There was however a significant difference between 3000 K and 17,000 K conditions with regard to the concentration of salivary melatonin (p = 0.001). ConclusionGiven that there was no significant difference among various light conditions in terms of biomarkers, it is concluded that using sources of light with high color temperature can be recommended. Nonetheless, because of the limitations of the present study (e.g. short period of intervention), it is suggested that care should be exercised in using such light sources.
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Citations
Citations to this article as recorded by
- A Blue-Enriched Light Intervention Counteracts the Alertness Decrement Among Mine Workers on Extended 12-Hour Night Shift Periods
Marc Hébert, Andrée-Anne Lavigne, Julie Auclair, Jeanne-Sophie Martin, Kimberley Francis, Justine Dumoulin Gagnon, Marc-André Dubois, Luc Laberge Journal of Occupational & Environmental Medicine.2023; 65(7): 584. CrossRef - Chrono-modulated effects of external stressors on oxidative stress and damage in humans: A scoping review on night shift work
Konstantinos C. Makris, Behzad Heibati, Shan Zienolddiny Narui Environment International.2023; 178: 108048. CrossRef - Age-dependent effect of continuous ‘artificial light at night’ on circadian rhythm in male rats: neuroprotective role of melatonin
Avnish Kumar Verma, Sandeep Singh, Syed Ibrahim Rizvi Biogerontology.2021; 22(5): 531. CrossRef - Blue light induces the nuclear translocation of neuropeptide receptor PAC1-R associated with the up-regulation of PAC1-R its own in reactive oxygen species associated way
Rongjie Yu, Zhuochao Lin, Zehua Ouyang, Zhengxin Tao, Guangchun Fan Biochimica et Biophysica Acta (BBA) - General Subjects.2021; 1865(6): 129884. CrossRef - Blue-Enriched White Light Improves Performance but Not Subjective Alertness and Circadian Adaptation During Three Consecutive Simulated Night Shifts
Erlend Sunde, Torhild Pedersen, Jelena Mrdalj, Eirunn Thun, Janne Grønli, Anette Harris, Bjørn Bjorvatn, Siri Waage, Debra J. Skene, Ståle Pallesen Frontiers in Psychology.2020;[Epub] CrossRef - The effect of work-related and socio-demographic factors on Work Ability Index (WAI) among Iranian workers
Hamidreza Mokarami, Haji Omid Kalteh, Hossein Marioryad Work.2020; 65(1): 137. CrossRef - Correction to: The effect of a blue enriched white light on salivary antioxidant capacity and melatonin among night shift workers: a field study
Reza Kazemi, Rasoul Hemmatjo, Hamidreza Mokarami Annals of Occupational and Environmental Medicine.2018;[Epub] CrossRef
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