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Jorge da Silva Franco R, Antonio Vieira Filho J, Inomata Cardoso da Silva D, Cuadrado Martin L, Alves Silva B, Garcia Zanati Bazan S, Barretti P, Regina Nogueira C. Non-dipping circadian pattern as a predictor of incipient nephropathy in normotensive normoalbuminuric type 1 diabetics. Chronobiol Int 2023; 40:1523-1528. [PMID: 37985469 DOI: 10.1080/07420528.2023.2282471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 11/07/2023] [Indexed: 11/22/2023]
Abstract
The objective of this study was to assess the value of the abnormal circadian blood pressure pattern by ambulatory blood pressure monitoring (ABPM) to predict the onset of abnormal albuminuria in normotensive and normoalbuminuric DM1 patients. The participators were submitted to ABPM and followed prospectively until the onset of albuminuria or the end of follow-up. The patients with normal circadian blood pressure pattern were compared with the non-dippers in regard of the time interval free of albuminuria. The survival curves were evaluated by the Kaplan-Meier method. Of 34 patients screened, 10 patients matched the exclusion criteria. Therefore, 24 patients were submitted to ABPM, aged 24 ± 8.3 y, 18 men, and all Caucasian. Elevated levels of albuminuria did not occurin any individual with normal systolic blood pressure dip (>10%) at 54 months of follow-up. Only 22% of patients among non-dippers were free of albuminuria (<30 mg/g maintained for 3 months) at the same time (p = 0.049). Patients that reached the outcome were homogeneous in regard to other clinical and ABPM data evaluated. Abnormal systolic blood pressure circadian pattern predicts the evolution to incipient nephropathy in normotensive normoalbuminuric DM1 patients.
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Affiliation(s)
- Roberto Jorge da Silva Franco
- Nephrology Discipline, Department of Internal Medicine, São Paulo State University (Unesp), Botucatu Medical School, São Paulo, Brazil
| | - José Antonio Vieira Filho
- Nephrology Discipline, Department of Internal Medicine, São Paulo State University (Unesp), Botucatu Medical School, São Paulo, Brazil
| | - Douglas Inomata Cardoso da Silva
- Nephrology Discipline, Department of Internal Medicine, São Paulo State University (Unesp), Botucatu Medical School, São Paulo, Brazil
| | - Luis Cuadrado Martin
- Nephrology Discipline, Department of Internal Medicine, São Paulo State University (Unesp), Botucatu Medical School, São Paulo, Brazil
| | - Bruno Alves Silva
- Nephrology Discipline, Department of Internal Medicine, São Paulo State University (Unesp), Botucatu Medical School, São Paulo, Brazil
| | - Silméia Garcia Zanati Bazan
- Cardiology Discipline, Department of Internal Medicine, São Paulo State University (Unesp), Botucatu Medical School, São Paulo, Brazil
| | - Pasqual Barretti
- Nephrology Discipline, Department of Internal Medicine, São Paulo State University (Unesp), Botucatu Medical School, São Paulo, Brazil
| | - Célia Regina Nogueira
- Endocrinology Discipline, Department of Internal Medicine, São Paulo State University (Unesp), Botucatu Medical School,São Paulo, Brazil
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Hou T, Chacon AN, Su W, Katsumata Y, Guo Z, Gong MC. Role of sympathetic pathway in light-phase time-restricted feeding-induced blood pressure circadian rhythm alteration. Front Nutr 2022; 9:969345. [PMID: 36159491 PMCID: PMC9493072 DOI: 10.3389/fnut.2022.969345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 08/01/2022] [Indexed: 11/25/2022] Open
Abstract
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 mPer2 Luc 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.
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Affiliation(s)
- Tianfei Hou
- Department of Physiology, College of Medicine, University of Kentucky, Lexington, KY, United States
| | - Aaron N. Chacon
- Department of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky, Lexington, KY, United States
| | - Wen Su
- Department of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky, Lexington, KY, United States
| | - Yuriko Katsumata
- Department of Biostatistics, College of Public Health, University of Kentucky, Lexington, KY, United States
| | - Zhenheng Guo
- Department of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky, Lexington, KY, United States
- Research and Development, Lexington Veterans Affairs Medical Center, Lexington, KY, United States
| | - Ming C. Gong
- Department of Physiology, College of Medicine, University of Kentucky, Lexington, KY, United States
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Yuan J, Wang L, Han S, Wang Z, Ni Y, Geng Y, Zhang L. PPARG Silencing Improves Blood Pressure Control and Alleviates Renal Damage by Modulating RAS Circadian Rhythm in Hypertensive Rats. Ann Clin Lab Sci 2022; 52:452-461. [PMID: 35777809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
OBJECTIVE Peroxisome proliferator-activated receptor gamma (PPARG) polymorphisms are associated with hypertension, but the role of PPARG in hypertensive nephropathy is poorly understood. METHODS Male Sprague-Dawley rats were applied to construct renovascular hypertension model by 2-kid-ney, 1-clip (2K1C) method. Tail vein bolus injection of adeno-associated virus (rAAV)-shPPARG was performed to knockout PPARG in 2K1C rats. The heart rate (HR), systolic pressure (SBP), diastolic pressure (DBP) and activity of rats were monitored after treatments. The role of PPARG in hypertension, renal damage, and circadian rhythm of renin-angiotensin system (RAS) was explored by quantitative real-time reverse transcription polymerase chain reaction (qRT-PCR), western blot, Masson staining, hematoxylin eosin (HE) staining, Sirius red staining and enzyme-linked immunosorbent assay. RESULTS PPARG was over-expressed in thoracic aortas of 2K1C rats. 2K1C treatment enhanced DBP and SBP in rats, which was reversed by PPARG silencing. PPARG silencing alleviated 2K1C-induced renal damage. 2K1C treatment reduced angiotensin II and increased angiotensin converting enzyme (ACE) and plasma renin activity (PRA) concentrations in rat plasma during the light period and decreased plasma PRA concentration during the dark period, which were all overturned by PPARG silencing. PPARG silencing effectively improved the RAS circadian rhythm in hypertension. CONCLUSION PPARG silencing improved blood pressure control and alleviated renal damage by regulating RAS circadian rhythm in hypertensive rats.
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Affiliation(s)
- Jing Yuan
- Center of Cardiology and Hebei General Hospital, Shijiazhuang, Hebei, China
| | - Lili Wang
- Center of Cardiology and Hebei General Hospital, Shijiazhuang, Hebei, China
| | - Shuang Han
- Center of Cardiology and Hebei General Hospital, Shijiazhuang, Hebei, China
| | - Zhongli Wang
- Physical Examination Center, Hebei General Hospital, Shijiazhuang, Hebei, China
| | - Yanhui Ni
- Center of Cardiology and Hebei General Hospital, Shijiazhuang, Hebei, China
| | - Yanping Geng
- Center of Cardiology and Hebei General Hospital, Shijiazhuang, Hebei, China
| | - Li Zhang
- Center of Cardiology and Hebei General Hospital, Shijiazhuang, Hebei, China
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Hou T, Su W, Duncan MJ, Olga VA, Guo Z, Gong MC. Time-restricted feeding protects the blood pressure circadian rhythm in diabetic mice. Proc Natl Acad Sci U S A 2021; 118:e2015873118. [PMID: 34161259 PMCID: PMC8237651 DOI: 10.1073/pnas.2015873118] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The quantity and quality of food intake have been considered crucial for peoples' wellness. Only recently has it become appreciated that the timing of food intake is also critical. Nondipping blood pressure (BP) is prevalent in diabetic patients and is associated with increased cardiovascular events. However, the causes and mechanisms of nondipping BP in diabetes are not fully understood. Here, we report that food intake and BP were arrhythmic in diabetic db/db mice fed a normal chow diet ad libitum. Imposing a food intake diurnal rhythm by time-restricted feeding (TRF; food was only available for 8 h during the active phase) prevented db/db mice from developing nondipping BP and effectively restored the already disrupted BP circadian rhythm in db/db mice. Interestingly, increasing the time of food availability from 8 h to 12 h during the active dark phase in db/db mice prompted isocaloric feeding and still provided robust protection of the BP circadian rhythm in db/db mice. In contrast, neither 8-h nor 12-h TRF affected BP dipping in wild-type mice. Mechanistically, we demonstrate that TRF protects the BP circadian rhythm in db/db mice via suppressing the sympathetic activity during the light phase when they are inactive and fasting. Collectively, these data reveal a potentially pivotal role of the timing of food intake in the prevention and treatment of nondipping BP in diabetes.
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Affiliation(s)
- Tianfei Hou
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, KY 40536
| | - Wen Su
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, KY 40536
| | - Marilyn J Duncan
- Department of Neuroscience, University of Kentucky, Lexington, KY 40536
| | | | - Zhenheng Guo
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, KY 40536;
- Research and Development, Lexington Veterans Affairs Medical Center, Lexington, KY 40502
| | - Ming C Gong
- Department of Physiology, University of Kentucky, Lexington, KY 40536
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Rahman A, Hasan AU, Nishiyama A, Kobori H. Altered Circadian Timing System-Mediated Non-Dipping Pattern of Blood Pressure and Associated Cardiovascular Disorders in Metabolic and Kidney Diseases. Int J Mol Sci 2018; 19:E400. [PMID: 29385702 DOI: 10.3390/ijms19020400] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Revised: 01/12/2018] [Accepted: 01/20/2018] [Indexed: 12/15/2022] Open
Abstract
The morning surge in blood pressure (BP) coincides with increased cardiovascular (CV) events. This strongly suggests that an altered circadian rhythm of BP plays a crucial role in the development of CV disease (CVD). A disrupted circadian rhythm of BP, such as the non-dipping type of hypertension (i.e., absence of nocturnal BP decline), is frequently observed in metabolic disorders and chronic kidney disease (CKD). The circadian timing system, controlled by the central clock in the suprachiasmatic nucleus of the hypothalamus and/or by peripheral clocks in the heart, vasculature, and kidneys, modulates the 24 h oscillation of BP. However, little information is available regarding the molecular and cellular mechanisms of an altered circadian timing system-mediated disrupted dipping pattern of BP in metabolic disorders and CKD that can lead to the development of CV events. A more thorough understanding of this pathogenesis could provide novel therapeutic strategies for the management of CVD. This short review will address our and others' recent findings on the molecular mechanisms that may affect the dipping pattern of BP in metabolic dysfunction and kidney disease and its association with CV disorders.
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