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Maddaloni G, Barsotti N, Migliarini S, Giordano M, Nazzi S, Picchi M, Errico F, Usiello A, Pasqualetti M. Impact of Serotonin Deficiency on Circadian Dopaminergic Rhythms. Int J Mol Sci 2024; 25:6475. [PMID: 38928178 PMCID: PMC11203511 DOI: 10.3390/ijms25126475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Revised: 06/06/2024] [Accepted: 06/10/2024] [Indexed: 06/28/2024] Open
Abstract
Physiology and behavior are structured temporally to anticipate daily cycles of light and dark, ensuring fitness and survival. Neuromodulatory systems in the brain-including those involving serotonin and dopamine-exhibit daily oscillations in neural activity and help shape circadian rhythms. Disrupted neuromodulation can cause circadian abnormalities that are thought to underlie several neuropsychiatric disorders, including bipolar mania and schizophrenia, for which a mechanistic understanding is still lacking. Here, we show that genetically depleting serotonin in Tph2 knockout mice promotes manic-like behaviors and disrupts daily oscillations of the dopamine biosynthetic enzyme tyrosine hydroxylase (TH) in midbrain dopaminergic nuclei. Specifically, while TH mRNA and protein levels in the Substantia Nigra (SN) and Ventral Tegmental Area (VTA) of wild-type mice doubled between the light and dark phase, TH levels were high throughout the day in Tph2 knockout mice, suggesting a hyperdopaminergic state. Analysis of TH expression in striatal terminal fields also showed blunted rhythms. Additionally, we found low abundance and blunted rhythmicity of the neuropeptide cholecystokinin (Cck) in the VTA of knockout mice, a neuropeptide whose downregulation has been implicated in manic-like states in both rodents and humans. Altogether, our results point to a previously unappreciated serotonergic control of circadian dopamine signaling and propose serotonergic dysfunction as an upstream mechanism underlying dopaminergic deregulation and ultimately maladaptive behaviors.
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Affiliation(s)
- Giacomo Maddaloni
- Unit of Cell and Developmental Biology, Department of Biology, University of Pisa, 56127 Pisa, Italy (M.P.)
- Harvard Medical School, Department of Genetics, Harvard University, 77 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Noemi Barsotti
- Unit of Cell and Developmental Biology, Department of Biology, University of Pisa, 56127 Pisa, Italy (M.P.)
- Centro per l’Integrazione della Strumentazione Scientifica dell’Università di Pisa (CISUP), 56126 Pisa, Italy
| | - Sara Migliarini
- Unit of Cell and Developmental Biology, Department of Biology, University of Pisa, 56127 Pisa, Italy (M.P.)
| | - Martina Giordano
- Unit of Cell and Developmental Biology, Department of Biology, University of Pisa, 56127 Pisa, Italy (M.P.)
| | - Serena Nazzi
- Unit of Cell and Developmental Biology, Department of Biology, University of Pisa, 56127 Pisa, Italy (M.P.)
| | - Marta Picchi
- Unit of Cell and Developmental Biology, Department of Biology, University of Pisa, 56127 Pisa, Italy (M.P.)
| | - Francesco Errico
- CEINGE Biotecnologie Avanzate Franco Salvatore, 80131 Naples, Italy
- Department of Agricultural Sciences, University of Naples “Federico II”, 80055 Portici, Italy
| | - Alessandro Usiello
- CEINGE Biotecnologie Avanzate Franco Salvatore, 80131 Naples, Italy
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, Università degli Studi della Campania “Luigi Vanvitelli”, 81100 Caserta, Italy
| | - Massimo Pasqualetti
- Unit of Cell and Developmental Biology, Department of Biology, University of Pisa, 56127 Pisa, Italy (M.P.)
- Centro per l’Integrazione della Strumentazione Scientifica dell’Università di Pisa (CISUP), 56126 Pisa, Italy
- Center for Neuroscience and Cognitive Systems@UniTn, Istituto Italiano di Tecnologia, 38068 Rovereto, Italy
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Maddaloni G, Chang YJ, Senft RA, Dymecki SM. A brain circuit and neuronal mechanism for decoding and adapting to change in daylength. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.09.11.557218. [PMID: 37745319 PMCID: PMC10515809 DOI: 10.1101/2023.09.11.557218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/26/2023]
Abstract
Changes in daylight amount (photoperiod) drive pronounced alterations in physiology and behaviour1,2. Adaptive responses to seasonal photoperiods are vital to all organisms - dysregulation is associated with disease, from affective disorders3 to metabolic syndromes4. Circadian rhythm circuitry has been implicated5,6 yet little is known about the precise neural and cellular substrates that underlie phase synchronization to photoperiod change. Here we present a previously unknown brain circuit and novel system of axon branch-specific and reversible neurotransmitter deployment that together prove critical for behavioural and sleep adaptation to photoperiod change. We found that the recently defined neuron type called mrEn1-Pet17 located in the mouse brainstem Median Raphe Nucleus (MRN) segregates serotonin versus VGLUT3 (here proxy for the neurotransmitter glutamate) to different axonal branches innervating specific brain regions involved in circadian rhythm and sleep/wake timing8,9. We found that whether measured during the light or dark phase of the day this branch-specific neurotransmitter deployment in mrEn1-Pet1 neurons was indistinguishable; however, it strikingly reorganizes on photoperiod change. Specifically, axonal boutons but not cell soma show a shift in neurochemical phenotype upon change away from equinox light/dark conditions that reverses upon return to equinox. When we genetically disabled the deployment of VGLUT3 in mrEn1-Pet1 neurons, we found that sleep/wake periods and voluntary activity failed to synchronize to the new photoperiod or was significantly delayed. Combining intersectional rabies virus tracing and projection-specific neuronal silencing in vivo, we delineated a Preoptic Area-to-mrEn1Pet1 connection responsible for decoding the photoperiodic inputs, driving the neurochemical shift and promoting behavioural synchronization. Our results reveal a previously unrecognized brain circuit along with a novel form of periodic, branch-specific neurotransmitter deployment that together regulate organismal adaptation to photoperiod changes.
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Affiliation(s)
- G Maddaloni
- Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston 02115 MA, USA
| | - Y J Chang
- Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston 02115 MA, USA
| | - R A Senft
- Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston 02115 MA, USA
| | - S M Dymecki
- Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston 02115 MA, USA
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Edmonston D, Isakova T, Wolf M. Plasma Serotonin and Cardiovascular Outcomes in Chronic Kidney Disease. J Am Heart Assoc 2023; 12:e029785. [PMID: 37609990 PMCID: PMC10547345 DOI: 10.1161/jaha.123.029785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 07/11/2023] [Indexed: 08/24/2023]
Abstract
Background Platelet-poor plasma serotonin levels are associated with adverse cardiovascular outcomes. Although plasma serotonin levels increase in chronic kidney disease, the cardiovascular implications remain unknown. Methods and Results In 1114 participants from the prospective CRIC (Chronic Renal Insufficiency Cohort) Study, we evaluated the association between plasma serotonin, categorized as undetectable, intermediate, and high (≥20 ng/mL) levels, and cross-sectional findings on echocardiography, including left ventricular hypertrophy, left ventricular ejection fraction, and pulmonary hypertension. We also analyzed whether serotonin was associated with time-to-event cardiovascular outcomes, including heart failure hospitalization and atherosclerotic cardiovascular disease (ASCVD) events, in addition to mortality. Because selective serotonin reuptake inhibitors decrease plasma serotonin levels, we specifically evaluated the influence of selective serotonin reuptake inhibitor use in the relationship between serotonin and outcomes. Plasma serotonin level inversely correlated with estimated glomerular filtration rate and directly correlated with blood pressure. High plasma serotonin was associated with left ventricular hypertrophy (adjusted odds ratio, 2.74 [95% CI, 1.11-7.41]). In contrast, undetectable plasma serotonin level was associated with the highest risk of heart failure (adjusted hazard ratio [HR], 2.26 [95% CI, 1.40-3.66]) and ASCVD events (adjusted HR, 1.96 [95% CI, 1.15-3.32]). Conclusions In a large chronic kidney disease cohort, plasma serotonin levels correlated with blood pressure, and elevated serotonin levels were associated with left ventricular hypertrophy. In contrast, undetectable plasma serotonin was associated with the highest risk of heart failure and ASCVD events.
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Affiliation(s)
- Daniel Edmonston
- Division of Nephrology, Department of MedicineDuke University School of MedicineDurhamNC
- Duke Clinical Research InstituteDuke University School of MedicineDurhamNC
| | - Tamara Isakova
- Division of Nephrology and Hypertension, Department of Medicine, and Center for Translational Metabolism and Health, Institute for Public Health and MedicineNorthwestern University Feinberg School of MedicineChicagoIL
| | - Myles Wolf
- Division of Nephrology, Department of MedicineDuke University School of MedicineDurhamNC
- Duke Clinical Research InstituteDuke University School of MedicineDurhamNC
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Day time-restricted feeding shows differential synchronizing effects on age-related changes of serotonin metabolism in SCN and the pineal gland in male Wistar rats. Biogerontology 2022; 23:771-788. [PMID: 36322233 DOI: 10.1007/s10522-022-09994-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Accepted: 10/07/2022] [Indexed: 12/12/2022]
Abstract
The circadian timing system is synchronized by the environmental photic and non-photic signals. Light is the major cue that entrains the master circadian oscillator located in suprachiasmatic nucleus (SCN). With aging condition ocular light impairs because of the age-related deficiencies in the eye as a result the clock becomes less sensitive to light. In such case non-photic cues may play a major role in synchronizing the clock. Earlier studies have linked altered meal timings to induce many physiological changes including serotonin in different brain regions such as hypothalamus, brain stem and striatum. Much is not known about the effect of timed food restriction as a non-photic stimulus on serotonergic system in SCN under aging condition. We report here the synchronizing effects of time-restricted feeding (TRF) as a non-photic stimulus on serotonin and its related metabolites in the SCN and pineal gland of male Wistar rats upon aging. Under food restriction daily rhythmicity of serotonin 5-HT and 5-HTOH was abolished whereas NAS, 5-MIAA and NAT showed a significant decrease in their daily pulses upon food restriction in 3 months (m) old rats. Under forced day time feeding schedule the mean 24 h levels of serotonin have significantly decreased in 12 and 24 m old animals in SCN and pineal gland. Most of the serotonin metabolites in the SCN and pineal gland of 12 and 24 m old ad libitum fed group rats have shown rhythmicity. 5-HT, NAS, MEL and NAT have shown daily rhythm in the SCN of 12 and 24 m old rats whereas 5-MIAA and 5-MTOH did not show daily rhythm in both the age groups. The mean 24 h levels of 5-HTP, 5-HIAA, 5-MIAA, 5-MTOH, MEL and NAT were increased in the pineal gland of 12 and 24 months old rats. This work help demonstrate the role of TRF in synchronising age induced desynchronization in serotonin metabolome.
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Cavalcanti CCL, Da Silva Aragão R, Cadena-Burbano EV, Oliveira TRDP, Silva JM, Benjamim RDAC, Lago AB, Silva EHM, Costa TL, Manhães-De-Castro R. High-caloric or isocaloric maternal high-fat diets differently affect young-adult offspring behavior in anxiety-related tests and offspring sensitivity to acute fluoxetine. Behav Brain Res 2021; 403:113141. [PMID: 33508349 DOI: 10.1016/j.bbr.2021.113141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 12/14/2020] [Accepted: 01/18/2021] [Indexed: 11/29/2022]
Abstract
OBJECTIVE to evaluate the influence of two maternal high-fat diets with different caloric contents on anxiety-like behavior in young-adult offspring and their sensitivity to acute fluoxetine. METHODS females Wistar rats were used and divided according to diet received during gestation and lactation: Control (CTR), high-fat/isocaloric (HI) and high-fat/high-caloric (HH). Offspring were subsequently divided into three subgroups according to acute administration of vehicle or fluoxetine (1 or 10 mg/kg). To assess animals' anxiety-like behaviors, three tests were used: open field (OF), elevated plus-maze (EPM) and free-exploratory paradigm (FEP). RESULTS In OF, HI and HH showed increased hyperactivity- and anxiety-related behaviors, HI being more hyperactive than HH. In response to fluoxetine, HI offspring decreased number of quadrants entered, decreased number of central entries and spent less time in rearing in peripheral areas, while HH offspring showed less time spent in rearing in the OF peripheral area. In EPM test, HI pups spent more time in closed arms than the HH pups. Fluoxetine decreased number of open arms entries for HI offspring and increased percentage of time spent in central area for HH animals. Maternal diet did not influence FEP test, neither HI nor HH presented a response after fluoxetine acute administration. CONCLUSION Maternal high-fat diets influence offspring anxiety-like behavior in state-anxiety tests but not in trait-anxiety test. Responsiveness to acute fluoxetine depended on maternal diet, dose and which behavioral tests were being evaluated.
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Affiliation(s)
| | - Raquel Da Silva Aragão
- Graduate Program of Nutrition, Physical Activity and Phenotypic Plasticity Universidade Federal de Pernambuco, 55608-680, Vitória de Santo Antão, PE, Brazil; Graduate Program of Nutrition, Universidade Federal de Pernambuco, 50670-901, Recife, PE, Brazil; Physical Education and Sport Science Nucleus Academic Center of Vitoria, Universidade Federal de Pernambuco, 55608-680, Vitória de Santo Antão, PE, Brazil.
| | | | | | - Jacqueline Maria Silva
- Graduate Program of Nutrition, Universidade Federal de Pernambuco, 50670-901, Recife, PE, Brazil.
| | | | - Amanda Braz Lago
- Department of Nutrition, Universidade Federal de Pernambuco, 50670-901, Recife, PE, Brazil.
| | | | - Thuani Lamenha Costa
- Physical Education and Sport Science Nucleus Academic Center of Vitoria, Universidade Federal de Pernambuco, 55608-680, Vitória de Santo Antão, PE, Brazil.
| | - Raul Manhães-De-Castro
- Graduate Program of Neuropsychiatry and Behavioral Sciences, Universidade Federal de Pernambuco, 50670-901, Recife, PE, Brazil; Graduate Program of Nutrition, Universidade Federal de Pernambuco, 50670-901, Recife, PE, Brazil.
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Purnell BS, Buchanan GF. Free-running circadian breathing rhythms are eliminated by suprachiasmatic nucleus lesion. J Appl Physiol (1985) 2020; 129:49-57. [PMID: 32501775 PMCID: PMC7469233 DOI: 10.1152/japplphysiol.00211.2020] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 05/06/2020] [Accepted: 06/02/2020] [Indexed: 11/22/2022] Open
Abstract
It is widely agreed that breathing is subject to circadian regulation. Circadian differences in respiratory physiology significantly impact a number of diseases including sleep apnea, asthma, and seizure-induced death. The effect of time of day on breathing has been previously characterized; however, an endogenous free-running respiratory rhythm in mammals has not previously been described. Furthermore, it is assumed that circadian rhythms in breathing are dependent on the hypothalamic suprachiasmatic nucleus (SCN), the home of the mammalian central circadian oscillator, but this has not been shown experimentally. The breathing of mice was monitored during wakefulness using whole body plethysmography at six times of day while housed under light-dark conditions and at six circadian phases while housed under constant darkness. Respiratory frequency and minute ventilation, but not tidal volume, were significantly higher during the active phase in both entrained and free-running conditions. To determine whether circadian regulation of breathing requires the SCN, in separate sets of animals this structure was electrolytically lesioned bilaterally or a sham surgery was performed, and breathing was measured at six different time points. Time-dependent oscillations in breathing were lost in SCN-lesioned animals, but not those subjected to sham surgery. These results suggest that breathing is subject to circadian regulation via the SCN. Mechanistic insights into the circadian regulation of breathing may lead to targeted interventions to reduce the morbidity and mortality associated with diseases with respiratory pathophysiology.NEW & NOTEWORTHY It has long been appreciated that breathing is altered by time of day. This study demonstrates that rhythmicity in breathing persists in constant darkness but is dependent on the suprachiasmatic nucleus in the hypothalamus. Understanding circadian rhythms in breathing may be important for the treatment and prevention of diseases such as sleep apnea and sudden unexpected death in epilepsy.
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Affiliation(s)
- Benton S Purnell
- Interdisciplinary Graduate Program in Neuroscience, University of Iowa, Iowa City, Iowa
- Iowa Neuroscience Institute, University of Iowa, Iowa City, Iowa
- Department of Neurology, Carver College of Medicine, University of Iowa, Iowa City, Iowa
| | - Gordon F Buchanan
- Interdisciplinary Graduate Program in Neuroscience, University of Iowa, Iowa City, Iowa
- Iowa Neuroscience Institute, University of Iowa, Iowa City, Iowa
- Department of Neurology, Carver College of Medicine, University of Iowa, Iowa City, Iowa
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7
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da L.D. Barros M, Manhães-de-Castro R, Alves DT, Quevedo OG, Toscano AE, Bonnin A, Galindo L. Long term effects of neonatal exposure to fluoxetine on energy balance: A systematic review of experimental studies. Eur J Pharmacol 2018; 833:298-306. [DOI: 10.1016/j.ejphar.2018.06.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 06/01/2018] [Accepted: 06/07/2018] [Indexed: 02/01/2023]
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8
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Silva TLA, Braz GRF, Silva SCDA, Pedroza AADS, Freitas CDM, Ferreira DJS, da Silva AI, Lagranha CJ. Serotonin transporter inhibition during neonatal period induces sex-dependent effects on mitochondrial bioenergetics in the rat brainstem. Eur J Neurosci 2018; 48:1620-1634. [PMID: 29802653 DOI: 10.1111/ejn.13971] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 04/19/2018] [Accepted: 05/14/2018] [Indexed: 12/29/2022]
Abstract
The serotonin reuptake is mainly regulated by the serotonin transporters (SERTs), which are abundantly found in the raphe nuclei, located in the brainstem. Previous studies have shown that dysfunction in the SERT has been associated with several disorders, including depression and cardiovascular diseases. In this manuscript, we aimed to investigate how gender and the treatment with a serotonin selective reuptake inhibitor (SSRI) could affect mitochondrial bioenergetics and oxidative stress in the brainstem of male and female rats. Fluoxetine, our chosen SSRI, was used during the neonatal period (i.e., from postnatal Day 1 to postnatal Day 21-PND1 to PND21) in both male and female animals. Thereafter, experiments were conducted in adult rats (60 days old). Our results demonstrate that, during lactation, fluoxetine treatment modulates the mitochondrial bioenergetics in a sex-dependent manner, such as improving male mitochondrial function and female antioxidant capacity.
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Affiliation(s)
- Tercya Lucidi Araujo Silva
- Neuropsychiatry and Behavioral Science Graduate Program, Federal University of Pernambuco, Recife, Brazil
| | - Glauber Rudá Feitoza Braz
- Neuropsychiatry and Behavioral Science Graduate Program, Federal University of Pernambuco, Recife, Brazil
| | | | | | | | | | - Aline Isabel da Silva
- Neuropsychiatry and Behavioral Science Graduate Program, Federal University of Pernambuco, Recife, Brazil
| | - Claudia Jacques Lagranha
- Neuropsychiatry and Behavioral Science Graduate Program, Federal University of Pernambuco, Recife, Brazil
- Biochemistry and Physiology Graduate Program, Federal University of Pernambuco, Recife, Brazil
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9
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Simões‐Alves AC, Silva‐Filho RC, Braz GR, Silva SC, da Silva AI, Lagranha CJ, Fernandes MP. Neonatal treatment with fluoxetine improves mitochondrial respiration and reduces oxidative stress in liver of adult rats. J Cell Biochem 2018; 119:6555-6565. [DOI: 10.1002/jcb.26758] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 01/25/2018] [Indexed: 12/30/2022]
Affiliation(s)
- Aiany C. Simões‐Alves
- Laboratory of Biochemistry and Exercise BiochemistryDepartment of Physical Education Sports Science Federal University of Pernambuco‐CAVVitória de Santo AntãoPernambucoBrazil
- Nutrition, Physical Activity and Phenotypic Plasticity Graduate ProgramFederal University of Pernambuco‐CAVVitória de Santo AntãoPernambucoBrazil
| | - Reginaldo C. Silva‐Filho
- Laboratory of Biochemistry and Exercise BiochemistryDepartment of Physical Education Sports Science Federal University of Pernambuco‐CAVVitória de Santo AntãoPernambucoBrazil
- Nutrition, Physical Activity and Phenotypic Plasticity Graduate ProgramFederal University of Pernambuco‐CAVVitória de Santo AntãoPernambucoBrazil
| | - Glauber R.F. Braz
- Laboratory of Biochemistry and Exercise BiochemistryDepartment of Physical Education Sports Science Federal University of Pernambuco‐CAVVitória de Santo AntãoPernambucoBrazil
| | - Severina C.A. Silva
- Laboratory of Biochemistry and Exercise BiochemistryDepartment of Physical Education Sports Science Federal University of Pernambuco‐CAVVitória de Santo AntãoPernambucoBrazil
- Biochemistry and Physiology Graduate ProgramFederal University of PernambucoRecifePernambucoBrazil
| | - Aline I. da Silva
- Laboratory of Biochemistry and Exercise BiochemistryDepartment of Physical Education Sports Science Federal University of Pernambuco‐CAVVitória de Santo AntãoPernambucoBrazil
| | - Claudia J. Lagranha
- Laboratory of Biochemistry and Exercise BiochemistryDepartment of Physical Education Sports Science Federal University of Pernambuco‐CAVVitória de Santo AntãoPernambucoBrazil
- Biochemistry and Physiology Graduate ProgramFederal University of PernambucoRecifePernambucoBrazil
| | - Mariana P. Fernandes
- Laboratory of Biochemistry and Exercise BiochemistryDepartment of Physical Education Sports Science Federal University of Pernambuco‐CAVVitória de Santo AntãoPernambucoBrazil
- Nutrition, Physical Activity and Phenotypic Plasticity Graduate ProgramFederal University of Pernambuco‐CAVVitória de Santo AntãoPernambucoBrazil
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10
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Duncan MJ, Smith JT, Franklin KM. Time of day but not aging regulates 5-HT 7 receptor binding sites in the hamster hippocampus. Neurosci Lett 2017; 662:306-311. [PMID: 29107707 DOI: 10.1016/j.neulet.2017.10.057] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 10/18/2017] [Accepted: 10/27/2017] [Indexed: 12/15/2022]
Abstract
Activation of 5-HT7 receptors influences memory as well as circadian rhythms and other processes. This study investigated the regulation of the 5-HT7 receptors in the hippocampus, a likely substrate for the effects of 5-HT7 receptor compounds on memory. Because endogenous serotonin release is higher during the active phase, and chronic treatment with a serotonin-selective reuptake inhibitor down-regulates 5-HT7 receptors, we hypothesized that 5-HT7 receptors exhibit 24-h variations. We also hypothesized that aging decreases 5-HT7 receptors in the hippocampus, as it does in the dorsal raphe nucleus, a brain site for serotonergic resetting of circadian rhythms. Male hamsters (young, 3-5 mos; old, 17-21 mos) exposed to a light:dark cycle were euthanized at 4 times of day (zeitgeber times [ZT]1, 6, 13, & 19; ZT12=time of lights:off). 5-HT7 receptor autoradiography was conducted on hippocampal sections using [3H]8-OH-DPAT [2nM] as the radioligand and SB-269970 [1μM] to define nonspecific binding. Slide-mounted sections and radioactive standards were apposed to X-ray films; the resultant autoradiograms were assessed by computer-assisted microdensitometry. Specific 5-HT7 receptor binding was robustly expressed in the dentate gyrus (DG) and CA1 but not in the CA2 or CA3. In the CA1 and DG, specific 5-HT7 receptor binding exhibited 24-h rhythms with troughs at night (P<0.005; P<0.05, respectively). Aging did not significantly affect specific 5-HT7 receptor binding in these regions, nor were significant time and age interactions observed. These findings suggest that the therapeutic effectiveness of 5-HT7 drugs may vary with time of day of administration but not with the age of the recipient.
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Affiliation(s)
- Marilyn J Duncan
- Department of Neuroscience, University of Kentucky College of Medicine, 800 Rose Street, Lexington, KY 40536-0298, USA.
| | - J Tyler Smith
- Department of Neuroscience, University of Kentucky College of Medicine, 800 Rose Street, Lexington, KY 40536-0298, USA.
| | - Kathleen M Franklin
- Department of Neuroscience, University of Kentucky College of Medicine, 800 Rose Street, Lexington, KY 40536-0298, USA.
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11
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Paulus EV, Mintz EM. Circadian rhythms of clock gene expression in the cerebellum of serotonin-deficient Pet-1 knockout mice. Brain Res 2016; 1630:10-7. [PMID: 26529643 DOI: 10.1016/j.brainres.2015.10.044] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Revised: 10/09/2015] [Accepted: 10/24/2015] [Indexed: 10/22/2022]
Abstract
Serotonin plays an important role in the central regulation of circadian clock function. Serotonin levels are generally higher in the brain during periods of high activity, and these periods are in turn heavily regulated by the circadian clock located in the suprachiasmatic nucleus. However, the role of serotonin as a regulator of circadian rhythms elsewhere in the brain has not been extensively examined. In this study, we examined circadian rhythms of clock gene expression in the cerebellum in mice lacking the Pet-1 transcription factor, which results in a developed brain that is deficient in serotonin neurons. If serotonin helps to synchronize rhythms in brain regions other than the suprachiasmatic nucleus, we would expect to see differences in clock gene expression in these serotonin deficient mice. We found minor differences in the expression of Per1 and Per2 in the knockout mice as compared to wild type, but these differences were small and of questionable functional importance. We also measured the response of cerebellar clocks to injections of the serotonin agonist 8-OH-DPAT during the early part of the night. No effect on clock genes was observed, though the immediate-early gene Fos showed increased expression in wild type mice but not the knockouts. These results suggest that serotonin is not an important mediator of circadian rhythms in the cerebellum in a way that parallels its regulation of the circadian clock in the suprachiasmatic nucleus.
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Affiliation(s)
- Erin V Paulus
- Department of Biological Sciences and School of Biomedical Sciences, Kent State University, Kent, OH 44242, United States
| | - Eric M Mintz
- Department of Biological Sciences and School of Biomedical Sciences, Kent State University, Kent, OH 44242, United States.
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12
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da Silva AI, Braz GRF, Pedroza AA, Nascimento L, Freitas CM, Ferreira DJS, Manhães de Castro R, Lagranha CJ. Fluoxetine induces lean phenotype in rat by increasing the brown/white adipose tissue ratio and UCP1 expression. J Bioenerg Biomembr 2015; 47:309-18. [DOI: 10.1007/s10863-015-9617-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Accepted: 06/16/2015] [Indexed: 12/22/2022]
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13
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Versteeg RI, Serlie MJ, Kalsbeek A, la Fleur SE. Serotonin, a possible intermediate between disturbed circadian rhythms and metabolic disease. Neuroscience 2015; 301:155-67. [PMID: 26047725 DOI: 10.1016/j.neuroscience.2015.05.067] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2015] [Revised: 05/21/2015] [Accepted: 05/27/2015] [Indexed: 01/27/2023]
Abstract
It is evident that eating in misalignment with the biological clock (such as in shift work, eating late at night and skipping breakfast) is associated with increased risk for obesity and diabetes. The biological clock located in the suprachiasmatic nucleus dictates energy balance including feeding behavior and glucose metabolism. Besides eating and sleeping patterns, glucose metabolism also exhibits clear diurnal variations with higher blood glucose concentrations, glucose tolerance and insulin sensitivity prior to waking up. The daily variation in plasma glucose concentrations in rats, is independent of the rhythm in feeding behavior. On the other hand, feeding itself has profound effects on glucose metabolism, but differential effects occur depending on the time of the day. We here review data showing that a disturbed diurnal eating pattern results in alterations in glucose metabolism induced by a disrupted circadian clock. We first describe the role of central serotonin on feeding behavior and glucose metabolism and subsequently describe the effects of central serotonin on the circadian system. We next explore the interaction between the serotonergic system and the circadian clock in conditions of disrupted diurnal rhythms in feeding and how this might be involved in the metabolic dysregulation that occurs with chronodisruption.
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Affiliation(s)
- R I Versteeg
- Department of Endocrinology and Metabolism, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - M J Serlie
- Department of Endocrinology and Metabolism, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - A Kalsbeek
- Department of Endocrinology and Metabolism, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands; Hypothalamic Integration Mechanisms, Netherlands Institute for Neuroscience, Amsterdam, The Netherlands
| | - S E la Fleur
- Department of Endocrinology and Metabolism, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
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da Silva AI, Braz GRF, Silva-Filho R, Pedroza AA, Ferreira DS, Manhães de Castro R, Lagranha C. Effect of fluoxetine treatment on mitochondrial bioenergetics in central and peripheral rat tissues. Appl Physiol Nutr Metab 2015; 40:565-74. [DOI: 10.1139/apnm-2014-0462] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Recent investigations have focused on the mitochondrion as a direct drug target in the treatment of metabolic diseases (obesity, metabolic syndrome). Relatively few studies, however, have explicitly investigated whether drug therapies aimed at changing behavior by altering central nervous system (CNS) function affect mitochondrial bioenergetics, and none has explored their effect during early neonatal development. The present study was designed to evaluate the effects of chronic treatment of newborn male rats with the selective serotonin reuptake inhibitor fluoxetine on the mitochondrial bioenergetics of the hypothalamus and skeletal muscle during the critical nursing period of development. Male Wistar rat pups received either fluoxetine (Fx group) or vehicle solution (Ct group) from the day of birth until 21 days of age. At 60 days of age, mitochondrial bioenergetics were evaluated. The Fx group showed increased oxygen consumption in several different respiratory states and reduced production of reactive oxygen species, but there was no change in mitochondrial permeability transition pore opening or oxidative stress in either the hypothalamus or skeletal muscle. We observed an increase in glutathione S-transferase activity only in the hypothalamus of the Fx group. Taken together, our results suggest that chronic exposure to fluoxetine during the nursing phase of early rat development results in a positive modulation of mitochondrial respiration in the hypothalamus and skeletal muscle that persists into adulthood. Such long-lasting alterations in mitochondrial activity in the CNS, especially in areas regulating appetite, may contribute to permanent changes in energy balance in treated animals.
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Affiliation(s)
- Aline Isabel da Silva
- Programa de Pós-Graduação em Nutrição, Departamento de Nutrição da Universidade Federal de Pernambuco, Recife, Brazil
- Laboratory of Biochemistry and Exercise Biochemistry, Department of Physical Education and Sports Science, CAV-Federal University of Pernambuco, Brazil
| | - Glauber Ruda Feitoza Braz
- Laboratory of Biochemistry and Exercise Biochemistry, Department of Physical Education and Sports Science, CAV-Federal University of Pernambuco, Brazil
| | - Reginaldo Silva-Filho
- Laboratory of Biochemistry and Exercise Biochemistry, Department of Physical Education and Sports Science, CAV-Federal University of Pernambuco, Brazil
| | - Anderson Apolonio Pedroza
- Laboratory of Biochemistry and Exercise Biochemistry, Department of Physical Education and Sports Science, CAV-Federal University of Pernambuco, Brazil
| | - Diorginis Soares Ferreira
- Laboratory of Biochemistry and Exercise Biochemistry, Department of Physical Education and Sports Science, CAV-Federal University of Pernambuco, Brazil
| | - Raul Manhães de Castro
- Programa de Pós-Graduação em Nutrição, Departamento de Nutrição da Universidade Federal de Pernambuco, Recife, Brazil
| | - Claudia Lagranha
- Laboratory of Biochemistry and Exercise Biochemistry, Department of Physical Education and Sports Science, CAV-Federal University of Pernambuco, Brazil
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Valdés-Fuentes M, Vera-Rivera G, De Ita-Pérez D, Méndez I, Miranda MI, Díaz-Muñoz M. Effect of daytime-restricted feeding in the daily variations of liver metabolism and blood transport of serotonin in rat. Physiol Rep 2015; 3:3/5/e12389. [PMID: 25948822 PMCID: PMC4463822 DOI: 10.14814/phy2.12389] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The biogenic amine serotonin is a signaling molecule in the gastrointestinal tract, platelets, and nervous tissue. In nervous system, serotonin and its metabolites are under the control of the circadian timing system, but it is not known if daily variations of serotonin exist in the liver. To explore this possibility, we tested if the rhythmic pattern of serotonin metabolism was regulated by daytime restricted feeding (DRF) which is a protocol associated to the expression of the food entrained oscillator (FEO). The DRF involved food access for 2 h each day for 3 weeks. Control groups included food ad libitum (AL) as well as acute fasting and refeeding. Serotonin-related metabolites were measured by high pressure liquid chromatography, the anabolic and catabolic enzymes were evaluated by western blot, qPCR, and immunohistochemistry to generate 24-h profiles. The results showed in the AL group, liver serotonin, tryptophan hydroxylase-1 activity, and protein abundance as well as serotonin in plasma and serum were rhythmic and coordinated. The DRF protocol disrupted this coordinated response and damped the rhythmic profile of these parameters. We demonstrated the daily synthesis and the degradation of serotonin as well as its transport in blood. This rhythm could influence the physiological role played by serotonin in peripheral organs. DRF caused an uncoordinated response in the liver and blood serotonin rhythm. This modification could be a part of the physiology of the FEO.
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Affiliation(s)
- Marlen Valdés-Fuentes
- Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Querétaro, Qro., México
| | - Gabriela Vera-Rivera
- Department of Behavioral and Cognitive Neurobiology, Instituto de Neurobiología, Universidad Nacional Autónoma de México (UNAM), Querétaro, Qro., México
| | - Dalia De Ita-Pérez
- Department of Cellular and Molecular Neurobiology, Universidad Nacional Autónoma de México (UNAM), Querétaro, Qro., México
| | - Isabel Méndez
- Department of Cellular and Molecular Neurobiology, Universidad Nacional Autónoma de México (UNAM), Querétaro, Qro., México
| | - María Isabel Miranda
- Department of Behavioral and Cognitive Neurobiology, Instituto de Neurobiología, Universidad Nacional Autónoma de México (UNAM), Querétaro, Qro., México
| | - Mauricio Díaz-Muñoz
- Department of Cellular and Molecular Neurobiology, Universidad Nacional Autónoma de México (UNAM), Querétaro, Qro., México
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16
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Ota Y, Ago Y, Tanaka T, Hasebe S, Toratani Y, Onaka Y, Hashimoto H, Takuma K, Matsuda T. Anxiolytic-like effects of restraint during the dark cycle in adolescent mice. Behav Brain Res 2015; 284:103-11. [DOI: 10.1016/j.bbr.2015.02.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 02/01/2015] [Accepted: 02/05/2015] [Indexed: 01/16/2023]
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17
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Saricicek A, Chen J, Planeta B, Ruf B, Subramanyam K, Maloney K, Matuskey D, Labaree D, Deserno L, Neumeister A, Krystal JH, Gallezot JD, Huang Y, Carson RE, Bhagwagar Z. Test-retest reliability of the novel 5-HT1B receptor PET radioligand [11C]P943. Eur J Nucl Med Mol Imaging 2014; 42:468-77. [PMID: 25427881 DOI: 10.1007/s00259-014-2958-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Accepted: 11/03/2014] [Indexed: 10/24/2022]
Abstract
PURPOSE [(11)C]P943 is a novel, highly selective 5-HT1B PET radioligand. The aim of this study was to determine the test-retest reliability of [(11)C]P943 using two different modeling methods and to perform a power analysis with each quantification technique. METHODS Seven healthy volunteers underwent two PET scans on the same day. Regions of interest (ROIs) were the amygdala, hippocampus, pallidum, putamen, insula, frontal, anterior cingulate, parietal, temporal and occipital cortices, and cerebellum. Two multilinear radioligand quantification techniques were used to estimate binding potential: MA1, using arterial input function data, and the second version of the multilinear reference tissue model analysis (MRTM2), using the cerebellum as the reference region. Between-scan percent variability and intraclass correlation coefficients (ICC) were used to assess test-retest reliability. We also performed power analyses to determine the method that would allow the least number of subjects using within-subject or between-subject study designs. A voxel-wise ICC analysis for MRTM2 BPND was performed for the whole brain and all the ROIs studied. RESULTS Mean percent variability between two scans across regions ranged between 0.4 % and 12.4 % for MA1 BPND, 0.5 % and 11.5 % for MA1 BPP, 16.7 % and 28.3 % for MA1 BPF, and between 0.2 % and 5.4 % for MRTM2 BPND. The power analyses showed a greater number of subjects were required using MA1 BPF compared with other outcome measures for both within-subject and between-subject study designs. ICC values were the highest using MRTM2 BPND and the lowest with MA1 BPF in ten ROIs. Small regions and regions with low binding had lower ICC values than large regions and regions with high binding. CONCLUSION Reliable measures of 5-HT1B receptor binding can be obtained using the novel PET radioligand [(11)C]P943. Quantification of 5-HT1B receptor binding with MRTM2 BPND and with MA1 BPP provided the least variability and optimal power for within-subject and between-subject designs.
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18
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Influence of acute tryptophan depletion on verbal declarative episodic memory in young adult females. Amino Acids 2013; 45:1207-19. [DOI: 10.1007/s00726-013-1582-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Accepted: 08/15/2013] [Indexed: 10/26/2022]
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Bravo R, Matito S, Cubero J, Paredes SD, Franco L, Rivero M, Rodríguez AB, Barriga C. Tryptophan-enriched cereal intake improves nocturnal sleep, melatonin, serotonin, and total antioxidant capacity levels and mood in elderly humans. AGE (DORDRECHT, NETHERLANDS) 2013; 35:1277-85. [PMID: 22622709 PMCID: PMC3705114 DOI: 10.1007/s11357-012-9419-5] [Citation(s) in RCA: 102] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Accepted: 04/20/2012] [Indexed: 05/23/2023]
Abstract
Melatonin and serotonin rhythms, which exhibit a close association with the endogenous circadian component of sleep, are attenuated with increasing age. This decrease seems to be linked to sleep alterations in the elderly. Chrononutrition is a field of chronobiology that establishes the principle of consuming foodstuffs at times of the day when they are more useful for health, improving, therefore, biorhythms and physical performance. Our aim was to analyze whether the consumption of cereals enriched with tryptophan, the precursor of both serotonin and melatonin, may help in the reconsolidation of the sleep/wake cycle and counteract depression and anxiety in 35 middle-aged/elderly (aged 55-75 year) volunteers in a simple blind assay. Data were collected for 3 weeks according to the following schedule: The control week participants consumed standard cereals (22.5 mg tryptophan in 30 g cereals per dose) at breakfast and dinner; for the treatment week, cereals enriched with a higher dose of tryptophan (60 mg tryptophan in 30 g cereals per dose) were eaten at both breakfast and dinner; the posttreatment week volunteers consumed their usual diet. Each participant wore a wrist actimeter that logged activity during the whole experiment. Urine was collected to analyze melatonin and serotonin urinary metabolites and to measure total antioxidant capacity. The consumption of cereals containing the higher dose in tryptophan increased sleep efficiency, actual sleep time, immobile time, and decreased total nocturnal activity, sleep fragmentation index, and sleep latency. Urinary 6-sulfatoxymelatonin, 5-hydroxyindoleacetic acid levels, and urinary total antioxidant capacity also increased respectively after tryptophan-enriched cereal ingestion as well as improving anxiety and depression symptoms. Cereals enriched with tryptophan may be useful as a chrononutrition tool for alterations in the sleep/wake cycle due to age.
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Affiliation(s)
- R Bravo
- Department of Physiology Neuroimmunophysiology and Chrononutrition Research Group, Faculty of Science, University of Extremadura (UEx), Badajoz, Spain.
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Volgin DV, Stettner GM, Kubin L. Circadian dependence of receptors that mediate wake-related excitatory drive to hypoglossal motoneurons. Respir Physiol Neurobiol 2013; 188:301-7. [PMID: 23665050 DOI: 10.1016/j.resp.2013.04.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Revised: 04/29/2013] [Accepted: 04/30/2013] [Indexed: 10/26/2022]
Abstract
Serotonin (5-HT), norepinephrine and orexins (ORX) are the three best established mediators of wake-related activation of hypoglossal (XII) motoneurons that innervate the muscles of the tongue. Since the tongue's use is temporarily closely aligned with the rest-activity cycle, we tested whether expression of mRNA for relevant 5-HT, norepinephrine and ORX receptors varies in the XII nucleus with the rest-activity cycle. Adult rats (n=7-9/group) were decapitated at 8-9 am (near rest period onset) or at 6-7 pm (near active period onset). Tissue micropunches were extracted from medullary slices containing the XII motor and sensory external cuneate (ECN) nuclei. 5-HT2A, α1-adrenergic and ORX type 2 receptor mRNAs were quantified using RT-PCR. Only 5-HT2A receptor mRNA levels differed between the two time points and were higher at the active period onset; no differences were detected in the ECN. Consistent with the mRNA results, 5-HT2A protein levels were also higher in the XII nucleus at the active period onset than at rest onset. Thus, the endogenous serotonergic excitatory drive to XII motoneurons may be enhanced through circadian- or activity-dependent mechanisms that increase the availability of 5-HT2A receptors prior to the active period. Conversely, reduced levels of 5-HT2A receptors during the rest-sleep period may exacerbate the propensity for sleep-disordered breathing in subjects with anatomically compromised upper airway.
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Affiliation(s)
- Denys V Volgin
- Department of Animal Biology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104-6046, USA.
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Jiang WG, Li SX, Liu JF, Sun Y, Zhou SJ, Zhu WL, Shi J, Lu L. Hippocampal CLOCK protein participates in the persistence of depressive-like behavior induced by chronic unpredictable stress. Psychopharmacology (Berl) 2013; 227:79-92. [PMID: 23263459 DOI: 10.1007/s00213-012-2941-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2012] [Accepted: 11/26/2012] [Indexed: 01/07/2023]
Abstract
RATIONALE Circadian disturbances are strongly linked with major depression. The circadian proteins CLOCK and BMAL1 are abundantly expressed but function differently in the suprachiasmatic nucleus (SCN) and hippocampus. However, their roles in depressive-like behavior are still poorly understood. OBJECTIVES To investigate the alterations of CLOCK and BMAL1 in the SCN and hippocampus in rats subjected to chronic unpredictable stress (CUS) and to explore the relationship of circadian protein and the depressive-like behavior. RESULTS Together with depressive-like behavior induced by CUS, CLOCK and BMAL1 in the SC were inhibited during the light period, and the peak expression of CLOCK in the hippocampus was shifted from the dark to light period. BMAL1 expression in the hippocampus was not significantly changed. Two weeks after the termination of CUS, abnormalities of CLOCK in the CA1 and CA3 endured, with unchanged depressive-like behavior, but the expression of CLOCK and BMAL1 in the SCN recovered to control levels. Knockdown of the Clock gene in CA1 induced depressive-like behavior in normal rats. CLOCK in the SCN and hippocampus may participate in the development of depressive-like behavior. However, CLOCK in the hippocampus but not SCN was involved in the long-lasting effects of CUS on depressive-like behavior. BMAL1 in the hippocampus appeared to be unrelated to the effects of CUS on depressive-like behavior. CONCLUSION CLOCK protein in the hippocampus but not SCN play an important role in the long-lasting depressive-like behavior induced by CUS. These findings suggest a novel therapeutic target in the development of new antidepressants focusing on the regulation of circadian rhythm.
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Affiliation(s)
- Wen-Gao Jiang
- National Institute on Drug Dependence, Peking University, 38, Xue Yuan Road, Beijing, 100191, China
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22
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Circadian rhythms in obsessive–compulsive disorder. J Neural Transm (Vienna) 2012; 119:1077-83. [DOI: 10.1007/s00702-012-0805-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2012] [Accepted: 04/12/2012] [Indexed: 11/25/2022]
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Cubero J, Chanclón B, Sánchez S, Rivero M, Rodríguez AB, Barriga C. Improving the quality of infant sleep through the inclusion at supper of cereals enriched with tryptophan, adenosine-5'-phosphate, and uridine-5'-phosphate. Nutr Neurosci 2010; 12:272-80. [PMID: 19925721 DOI: 10.1179/147683009x423490] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
The present study evaluated whether the administration of cereals enriched with nutrients that are facilitators of sleep could help improve the sleep of infants who had sleep disorders at night time. Thirty infants aged 8-16 months with sleep disorders involving at least three nocturnal waking episodes took part in the study. They were given a night-time 'sleep facilitating cereal' product containing 225 mg tryptophan, 5.3 mg adenosine-5'-P, and 6.3 mg uridine-5'-P per 100 g of product. These cereals were given in a double-blind procedure lasting 5 weeks, with ingestion of the cereal between 18:00 and 06:00. In the control week, the children received a standard cereal (75 mg tryptophan/100 g product without nucleotides) dissolved in a standard formula milk (231.5 mg tryptophan, 2.6 mg adenosine-5'-P, 5 mg uridine-5'-P, per 100 g product). In one experimental week, the children received the night-time sleep facilitating cereal together with the standard formula milk. In another week, they received the sleep facilitating cereal together with a night milk specially formulated to attain the sleep rhythm (480 mg tryptophan, 8.8 mg uridine-5'-P, and 7.6 mg adenosine-5'-P per 100 g product). The three experimental weeks were separated by two wash-out weeks in which the milk and cereal administered was identical in composition to that of the control week. All the infants received a programmed writer actimeter which they wore continually, attached to their ankles, to record their motor activity. The recorded activity was used to calculate information about the time in bed, assumed sleep, actual sleep, sleep efficiency, sleep latency, immobility, and total activity. The infants receiving the enriched cereal during the time of darkness showed improvements in their sleep parameters, regardless of whether the milk they took at night was standard or enriched with tryptophan, adenosine-5'-P, and uridine-5'-P. In summary, the administration of enriched cereals led to an improvement in sleep, regardless of the type of infant milk used. These results support the concept of chrononutrition since they confirm that the sleep/wake rhythm can be influenced by diet.
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Affiliation(s)
- Javier Cubero
- Department of Physiology, Faculty of Sciences, University of Extremadura, Badajoz, Spain.
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Effect of melatonin on age induced changes in daily serotonin rhythms in suprachiasmatic nucleus of male Wistar rat. Biogerontology 2009; 11:299-308. [PMID: 19774481 DOI: 10.1007/s10522-009-9248-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2009] [Accepted: 09/10/2009] [Indexed: 01/08/2023]
Abstract
The decline in physiological functions with aging may affect the ability of the SCN, the biological clock, circadian pacemaker to transmit rhythmic information to other neural target sites, and thereby modify the expression of biological rhythms resulting in circadian disorders. Neurotransmitter serotonin plays important role in the photic and non-photic regulation of circadian rhythms and is a precursor of neurohormone melatonin, an internal zeitgeber. To assess effects of aging on the functional integrity of circadian system, we studied daily serotonin rhythms in the SCN by measuring serotonin levels at variable time points in wide range of age groups such as 15 days, 1, 2, 3 (adult), 4, 6, 9, 12, 18 and 24 months old male wistar rats. Animals were maintained in light-dark conditions (LD; 12:12) two weeks prior to experiment. We report here that in 15 days, 1 and 2 months old rat SCN the mean serotonin level is low and daily serotonin rhythm is just beginning; at 3, 4 and 6 months, serotonin levels and rhythms are robust and at 9, 12, 18 and 24 months mean serotonin levels are low again and rhythm is becoming more disrupted. Previous studies have shown the 5-HT rhythmicity was established by 3 month in rat brain but disintegrated by 6 months of age. As melatonin, an endogenous synchronizer and an antiaging agent, declines with aging, the effects of exogenous melatonin administration on serotonin rhythmicity in SCN in 3, 6, 9 and 24 months old rats were studied to assess effects of aging on responsiveness to melatonin. Our studies indicated an age related loss of sensitivity to melatonin in the restoration of age induced changes in SCN serotonin amplitude and rhythmicity.
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Paredes SD, Barriga C, Reiter RJ, Rodríguez AB. Assessment of the Potential Role of Tryptophan as the Precursor of Serotonin and Melatonin for the Aged Sleep-wake Cycle and Immune Function: Streptopelia Risoria as a Model. Int J Tryptophan Res 2009; 2:23-36. [PMID: 22084580 PMCID: PMC3195230 DOI: 10.4137/ijtr.s1129] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
In the present review we summarize the relationship between the amino acid, tryptophan, the neurotransmitter, serotonin, and the indole, melatonin, with the rhythms of sleep/wake and the immune response along with the possible connections between the alterations in these rhythms due to aging and the so-called “serotonin and melatonin deficiency state.” The decrease associated with aging of the brain and circulating levels of serotonin and melatonin seemingly contributes to the alterations of both the sleep/wake cycle and the immune response that typically accompany old age. The supplemental administration of tryptophan, e.g. the inclusion of tryptophan-enriched food in the diet, might help to remediate these age-related alterations due to its capacity of raise the serotonin and melatonin levels in the brain and blood. Herein, we also summarize a set of studies related to the potential role that tryptophan, and its derived product melatonin, may play in the restoration of the aged circadian rhythms of sleep/wake and immune response, taking the ringdove (Streptopeliarisoria) as a suitable model.
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Affiliation(s)
- Sergio D Paredes
- Department of Physiology (Neuroimmunophysiology Research Group), Faculty of Science, University of Extremadura, Badajoz, Spain
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Mateos SS, Sánchez CL, Paredes SD, Barriga C, Rodríguez AB. Circadian Levels of Serotonin in Plasma and Brain after Oral Administration of Tryptophan in Rats. Basic Clin Pharmacol Toxicol 2009; 104:52-9. [DOI: 10.1111/j.1742-7843.2008.00333.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Sánchez S, Sánchez CL, Paredes SD, Rodriguez AB, Barriga C. The effect of tryptophan administration on the circadian rhythms of melatonin in plasma and the pineal gland of rats. J Appl Biomed 2008. [DOI: 10.32725/jab.2008.021] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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