Role of sympathetic pathway in light-phase time-restricted feeding-induced blood pressure circadian rhythm alteration
Disruption of blood pressure (BP) circadian rhythm, independent of hypertension, is emerging as an index for future target organ damage and is associated with a higher risk of cardiovascular events. Previous studies showed that changing food availability time alters BP rhythm in several mammalian sp...
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| Format: | Article |
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Frontiers Media S.A.
2022-09-01
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| Series: | Frontiers in Nutrition |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fnut.2022.969345/full |
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| author | Tianfei Hou Aaron N. Chacon Wen Su Yuriko Katsumata Zhenheng Guo Zhenheng Guo Ming C. Gong |
| author_facet | Tianfei Hou Aaron N. Chacon Wen Su Yuriko Katsumata Zhenheng Guo Zhenheng Guo Ming C. Gong |
| author_sort | Tianfei Hou |
| collection | DOAJ |
| description | Disruption of blood pressure (BP) circadian rhythm, independent of hypertension, is emerging as an index for future target organ damage and is associated with a higher risk of cardiovascular events. Previous studies showed that changing food availability time alters BP rhythm in several mammalian species. However, the underlying mechanisms remain largely unknown. To address this, the current study specifically investigates (1) the relationship between rhythms of food intake and BP in wild-type mice; (2) effects of light-phase time-restricted feeding (TRF, food only available during light-phase) on BP circadian rhythm in wild-type and diabetic db/db mice; (3) the roles of the autonomic system and clock gene in light-phase TRF induced changes in BP circadian rhythm. Food intake and BP of C57BL/6J and db/db mice were simultaneously and continuously recorded using BioDAQ and telemetry systems under ad libitum or light-phase TRF. Per2 protein daily oscillation was recorded in vivo by IVIS spectrum in mPer2Luc mice. Autonomic nerve activity was evaluated by heart rate variability, baroreflex, urinary norepinephrine (NE) and epinephrine (Epi) excretion, and mRNA expressions of catecholamines biosynthetic and catabolic enzymes, and alpha-adrenergic receptors in mesenteric resistance arteries. We found that in wild-type mice, the BP level was correlated with the food intake temporally across the 24 h. Reversing the feeding time by imposing light-phase TRF resulted in reverse or inverted BP dipping. Interestingly, the net changes in food intake were correlated with the net alteration in BP temporally under light-phase TRF. In db/db mice, light-phase TRF worsened the existing non-dipping BP. The food intake and BP circadian rhythm changes were associated with alterations in Per2 protein daily oscillation and the time-of-day variations in heart rate variability, baroreflex, and urinary excretion of NE and Epi, and increased mRNA expression of Slc6a2 (encoding NE transporter) and Adra1d (encoding alpha-adrenergic receptor 1d) in the mesenteric resistance arteries, indicating the sympathetic nervous system (SNS) was modulated after light-phase TRF. Collectively, our results demonstrated that light-phase TRF results in reverse dipping of BP in wild-type and diabetic db/db mice and revealed the potential role of the sympathetic pathway in light-phase TRF-induced BP circadian rhythm alteration. |
| first_indexed | 2024-04-11T11:47:10Z |
| format | Article |
| id | doaj.art-f90875bd9dc04882b46d691bea0665be |
| institution | Directory Open Access Journal |
| issn | 2296-861X |
| language | English |
| last_indexed | 2024-04-11T11:47:10Z |
| publishDate | 2022-09-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Nutrition |
| spelling | doaj.art-f90875bd9dc04882b46d691bea0665be2022-12-22T04:25:32ZengFrontiers Media S.A.Frontiers in Nutrition2296-861X2022-09-01910.3389/fnut.2022.969345969345Role of sympathetic pathway in light-phase time-restricted feeding-induced blood pressure circadian rhythm alterationTianfei Hou0Aaron N. Chacon1Wen Su2Yuriko Katsumata3Zhenheng Guo4Zhenheng Guo5Ming C. Gong6Department of Physiology, College of Medicine, University of Kentucky, Lexington, KY, United StatesDepartment of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky, Lexington, KY, United StatesDepartment of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky, Lexington, KY, United StatesDepartment of Biostatistics, College of Public Health, University of Kentucky, Lexington, KY, United StatesDepartment of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky, Lexington, KY, United StatesResearch and Development, Lexington Veterans Affairs Medical Center, Lexington, KY, United StatesDepartment of Physiology, College of Medicine, University of Kentucky, Lexington, KY, United StatesDisruption of blood pressure (BP) circadian rhythm, independent of hypertension, is emerging as an index for future target organ damage and is associated with a higher risk of cardiovascular events. Previous studies showed that changing food availability time alters BP rhythm in several mammalian species. However, the underlying mechanisms remain largely unknown. To address this, the current study specifically investigates (1) the relationship between rhythms of food intake and BP in wild-type mice; (2) effects of light-phase time-restricted feeding (TRF, food only available during light-phase) on BP circadian rhythm in wild-type and diabetic db/db mice; (3) the roles of the autonomic system and clock gene in light-phase TRF induced changes in BP circadian rhythm. Food intake and BP of C57BL/6J and db/db mice were simultaneously and continuously recorded using BioDAQ and telemetry systems under ad libitum or light-phase TRF. Per2 protein daily oscillation was recorded in vivo by IVIS spectrum in mPer2Luc mice. Autonomic nerve activity was evaluated by heart rate variability, baroreflex, urinary norepinephrine (NE) and epinephrine (Epi) excretion, and mRNA expressions of catecholamines biosynthetic and catabolic enzymes, and alpha-adrenergic receptors in mesenteric resistance arteries. We found that in wild-type mice, the BP level was correlated with the food intake temporally across the 24 h. Reversing the feeding time by imposing light-phase TRF resulted in reverse or inverted BP dipping. Interestingly, the net changes in food intake were correlated with the net alteration in BP temporally under light-phase TRF. In db/db mice, light-phase TRF worsened the existing non-dipping BP. The food intake and BP circadian rhythm changes were associated with alterations in Per2 protein daily oscillation and the time-of-day variations in heart rate variability, baroreflex, and urinary excretion of NE and Epi, and increased mRNA expression of Slc6a2 (encoding NE transporter) and Adra1d (encoding alpha-adrenergic receptor 1d) in the mesenteric resistance arteries, indicating the sympathetic nervous system (SNS) was modulated after light-phase TRF. Collectively, our results demonstrated that light-phase TRF results in reverse dipping of BP in wild-type and diabetic db/db mice and revealed the potential role of the sympathetic pathway in light-phase TRF-induced BP circadian rhythm alteration.https://www.frontiersin.org/articles/10.3389/fnut.2022.969345/fullblood pressure circadian rhythmtime-restricted feedingsympathetic nervous systemheart rate variabilitybaroreflexnorepinephrine |
| spellingShingle | Tianfei Hou Aaron N. Chacon Wen Su Yuriko Katsumata Zhenheng Guo Zhenheng Guo Ming C. Gong Role of sympathetic pathway in light-phase time-restricted feeding-induced blood pressure circadian rhythm alteration Frontiers in Nutrition blood pressure circadian rhythm time-restricted feeding sympathetic nervous system heart rate variability baroreflex norepinephrine |
| title | Role of sympathetic pathway in light-phase time-restricted feeding-induced blood pressure circadian rhythm alteration |
| title_full | Role of sympathetic pathway in light-phase time-restricted feeding-induced blood pressure circadian rhythm alteration |
| title_fullStr | Role of sympathetic pathway in light-phase time-restricted feeding-induced blood pressure circadian rhythm alteration |
| title_full_unstemmed | Role of sympathetic pathway in light-phase time-restricted feeding-induced blood pressure circadian rhythm alteration |
| title_short | Role of sympathetic pathway in light-phase time-restricted feeding-induced blood pressure circadian rhythm alteration |
| title_sort | role of sympathetic pathway in light phase time restricted feeding induced blood pressure circadian rhythm alteration |
| topic | blood pressure circadian rhythm time-restricted feeding sympathetic nervous system heart rate variability baroreflex norepinephrine |
| url | https://www.frontiersin.org/articles/10.3389/fnut.2022.969345/full |
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