Effect of night-shift work on cortisol circadian rhythm and melatonin levels
Objectives: Night-shift work has been associated with several negative effects on worker’s health, possibly due to circadian desynchronization, sleep deprivation and suppression of nocturnal melatonin secretion including exposure to light during the work shift. The objective of this study was to eva...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Thieme Revinter Publicações Ltda.
2022-06-01
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| Series: | Sleep Science |
| Subjects: | |
| Online Access: | https://cdn.publisher.gn1.link/sleepscience.org.br/pdf/v15n2a02.pdf |
| _version_ | 1797368062745247744 |
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| author | Maria Carlota Borba Brum Martha Bergan Senger Claudia Carolina Schnorr Lethicia Rozales Ehlert Ticiana da Costa Rodrigues |
| author_facet | Maria Carlota Borba Brum Martha Bergan Senger Claudia Carolina Schnorr Lethicia Rozales Ehlert Ticiana da Costa Rodrigues |
| author_sort | Maria Carlota Borba Brum |
| collection | DOAJ |
| description | Objectives: Night-shift work has been associated with several negative effects on worker’s health, possibly due to circadian desynchronization, sleep deprivation and suppression of nocturnal melatonin secretion including exposure to light during the work shift. The objective of this study was to evaluate the impact of fixed night-shift work versus day-shift work on the sleep-wake cycle and on the night and day levels of cortisol and melatonin.
Material and Methods: Saliva samples were obtained from 36 individuals, 19 day workers (12 women and 7 men) and 17 night workers (12 women and 5 men) from a university hospital in southern Brazil, with no history of chronic diseases. Demographic and personal information were obtained through a self-administered questionnaire and sleep information by the Munich chronotype questionnaire.
Results: Salivary cortisol showed normal circadian rhythm in day- and night-shift workers, but was attenuated in night-shift workers during their working hours and on leave days. Night workers sleep fewer hours at night and have higher negative social jet lag than day workers.
Conclusion: Intervals between night shifts can be beneficial for the recovery of the hypothalamic-pituitary-adrenal axis, minimizing the negative effects on workers’ health, in addition to a preventive approach to aspects related to sleep hygiene and healthy life habits. |
| first_indexed | 2024-03-08T17:27:07Z |
| format | Article |
| id | doaj.art-d4edc8f10cd94b9ba4dbce1f17d833dc |
| institution | Directory Open Access Journal |
| issn | 1984-0659 1984-0063 |
| language | English |
| last_indexed | 2024-03-08T17:27:07Z |
| publishDate | 2022-06-01 |
| publisher | Thieme Revinter Publicações Ltda. |
| record_format | Article |
| series | Sleep Science |
| spelling | doaj.art-d4edc8f10cd94b9ba4dbce1f17d833dc2024-01-02T18:41:30ZengThieme Revinter Publicações Ltda.Sleep Science1984-06591984-00632022-06-011502143148000210.5935/1984-0063.20220034Effect of night-shift work on cortisol circadian rhythm and melatonin levelsMaria Carlota Borba Brum0Martha Bergan Senger1Claudia Carolina Schnorr2Lethicia Rozales Ehlert3Ticiana da Costa Rodrigues4Clinical Hospital of Porto Alegre, Division of Occupational Medicine - Porto Alegre - Rio Grande do Sul - Brazil.Clinical Hospital of Porto Alegre, Division of Clinical Pathology - Porto Alegre - Rio Grande do Sul - Brazil.Clinical Hospital of Porto Alegre, Division of Peripheral Vascular Surgery - Porto Alegre - Rio Grande do Sul - Brazil.Clinical Hospital of Porto Alegre, Division of Clinical Pathology - Porto Alegre - Rio Grande do Sul - Brazil.Clinical Hospital of Porto Alegre, Division of Endocrinology - Porto Alegre - Rio Grande do Sul - Brazil.Objectives: Night-shift work has been associated with several negative effects on worker’s health, possibly due to circadian desynchronization, sleep deprivation and suppression of nocturnal melatonin secretion including exposure to light during the work shift. The objective of this study was to evaluate the impact of fixed night-shift work versus day-shift work on the sleep-wake cycle and on the night and day levels of cortisol and melatonin. Material and Methods: Saliva samples were obtained from 36 individuals, 19 day workers (12 women and 7 men) and 17 night workers (12 women and 5 men) from a university hospital in southern Brazil, with no history of chronic diseases. Demographic and personal information were obtained through a self-administered questionnaire and sleep information by the Munich chronotype questionnaire. Results: Salivary cortisol showed normal circadian rhythm in day- and night-shift workers, but was attenuated in night-shift workers during their working hours and on leave days. Night workers sleep fewer hours at night and have higher negative social jet lag than day workers. Conclusion: Intervals between night shifts can be beneficial for the recovery of the hypothalamic-pituitary-adrenal axis, minimizing the negative effects on workers’ health, in addition to a preventive approach to aspects related to sleep hygiene and healthy life habits.https://cdn.publisher.gn1.link/sleepscience.org.br/pdf/v15n2a02.pdfcortisolmelatoninnight workcircadian rhythmdesynchronization |
| spellingShingle | Maria Carlota Borba Brum Martha Bergan Senger Claudia Carolina Schnorr Lethicia Rozales Ehlert Ticiana da Costa Rodrigues Effect of night-shift work on cortisol circadian rhythm and melatonin levels Sleep Science cortisol melatonin night work circadian rhythm desynchronization |
| title | Effect of night-shift work on cortisol circadian rhythm and melatonin levels |
| title_full | Effect of night-shift work on cortisol circadian rhythm and melatonin levels |
| title_fullStr | Effect of night-shift work on cortisol circadian rhythm and melatonin levels |
| title_full_unstemmed | Effect of night-shift work on cortisol circadian rhythm and melatonin levels |
| title_short | Effect of night-shift work on cortisol circadian rhythm and melatonin levels |
| title_sort | effect of night shift work on cortisol circadian rhythm and melatonin levels |
| topic | cortisol melatonin night work circadian rhythm desynchronization |
| url | https://cdn.publisher.gn1.link/sleepscience.org.br/pdf/v15n2a02.pdf |
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