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Squarcio F, Hitrec T, Luppi M, Martelli D, Occhinegro A, Piscitiello E, Taddei L, Tupone D, Amici R, Cerri M. Ultrasonic vocalisations during rapid eye movement sleep in the rat. J Sleep Res 2024; 33:e13993. [PMID: 37430421 DOI: 10.1111/jsr.13993] [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: 11/24/2022] [Revised: 05/04/2023] [Accepted: 06/24/2023] [Indexed: 07/12/2023]
Abstract
Rats are known to use a 22-kHz ultrasonic vocalisation as a distress call to warn of danger to other members of their group. We monitored 22-kHz ultrasonic vocalisation emissions in rats (lean and obese) as part of a sleep deprivation study to detect the eventual presence of stress during the procedure. Unexpectedly, we detected ultrasonic vocalisation emission during rapid eye movement (REM) sleep, but not during non-REM (NREM) sleep, in all the rats. The event occurs during the expiratory phase and can take place singularly or as a train. No difference was detected in the number or duration of these events in lean versus obese rats, during the light versus the dark period, and after sleep deprivation. As far as we know, this is the first report showing that rats can vocalise during REM sleep.
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Affiliation(s)
- Fabio Squarcio
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Timna Hitrec
- School of Physiology, Pharmacology, and Neuroscience, University of Bristol, Bristol, UK
| | - Marco Luppi
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Davide Martelli
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Alessandra Occhinegro
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Emiliana Piscitiello
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Ludovico Taddei
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Domenico Tupone
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Roberto Amici
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Matteo Cerri
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
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Hitrec T, Squarcio F, Piscitiello E, Cerri M, Martelli D, Occhinegro A, Taddei L, Tupone D, Amici R, Luppi M. Sleep deprivation soon after recovery from synthetic torpor enhances tau protein dephosphorylation in the rat brain. J Comp Physiol B 2023:10.1007/s00360-023-01516-2. [PMID: 37812305 DOI: 10.1007/s00360-023-01516-2] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 08/11/2023] [Accepted: 09/11/2023] [Indexed: 10/10/2023]
Abstract
Neuronal Tau protein hyperphosphorylation (PPtau) is a hallmark of tauopathic neurodegeneration. However, a reversible brain PPtau occurs in mammals during either natural or "synthetic" torpor (ST), a transient deep hypothermic state that can be pharmacologically induced in rats. Since in both conditions a high sleep pressure builds up during the regaining of euthermia, the aim of this work was to assess the possible role of post-ST sleep in PPtau dephosphorylation. Male rats were studied at the hypothermic nadir of ST, and 3-6 h after the recovery of euthermia, after either normal sleep (NS) or total sleep deprivation (SD). The effects of SD were studied by assessing: (i) deep brain temperature (Tb); (ii) immunofluorescent staining for AT8 (phosphorylated Tau) and Tau-1 (non-phosphorylated Tau), assessed in 19 brain structures; (iii) different phosphorylated forms of Tau and the main cellular factors involved in Tau phospho-regulation, including pro- and anti-apoptotic markers, assessed through western blot in the parietal cortex and hippocampus; (iv) systemic factors which are involved in natural torpor; (v) microglia activation state, by considering morphometric variations. Unexpectedly, the reversibility of PPtau was more efficient in SD than in NS animals, and was concomitant with a higher Tb, higher melatonin plasma levels, and a higher frequency of the microglia resting phenotype. Since the reversibility of ST-induced PPtau was previously shown to be driven by a latent physiological molecular mechanism triggered by deep hypothermia, short-term SD soon after the regaining of euthermia seems to boost the possible neuroprotective effects of this mechanism.
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Affiliation(s)
- Timna Hitrec
- Department of Biomedical and NeuroMotor Sciences, University of Bologna, Piazza di Porta San Donato, 2, 40126, Bologna, Italy
| | - Fabio Squarcio
- Department of Biomedical and NeuroMotor Sciences, University of Bologna, Piazza di Porta San Donato, 2, 40126, Bologna, Italy
- Department of Psychiatry, University of Wisconsin-Madison, Madison, WI, USA
| | - Emiliana Piscitiello
- Department of Biomedical and NeuroMotor Sciences, University of Bologna, Piazza di Porta San Donato, 2, 40126, Bologna, Italy
- Centre for Applied Biomedical Research - CRBA, University of Bologna, St. Orsola Hospital, Bologna, Italy
| | - Matteo Cerri
- Department of Biomedical and NeuroMotor Sciences, University of Bologna, Piazza di Porta San Donato, 2, 40126, Bologna, Italy
| | - Davide Martelli
- Department of Biomedical and NeuroMotor Sciences, University of Bologna, Piazza di Porta San Donato, 2, 40126, Bologna, Italy
- Centre for Applied Biomedical Research - CRBA, University of Bologna, St. Orsola Hospital, Bologna, Italy
| | - Alessandra Occhinegro
- Department of Biomedical and NeuroMotor Sciences, University of Bologna, Piazza di Porta San Donato, 2, 40126, Bologna, Italy
- Centre for Applied Biomedical Research - CRBA, University of Bologna, St. Orsola Hospital, Bologna, Italy
| | - Ludovico Taddei
- Department of Biomedical and NeuroMotor Sciences, University of Bologna, Piazza di Porta San Donato, 2, 40126, Bologna, Italy
- Centre for Applied Biomedical Research - CRBA, University of Bologna, St. Orsola Hospital, Bologna, Italy
| | - Domenico Tupone
- Department of Biomedical and NeuroMotor Sciences, University of Bologna, Piazza di Porta San Donato, 2, 40126, Bologna, Italy
- Department of Neurological Surgery, Oregon Health and Science University, Portland, OR, USA
| | - Roberto Amici
- Department of Biomedical and NeuroMotor Sciences, University of Bologna, Piazza di Porta San Donato, 2, 40126, Bologna, Italy
| | - Marco Luppi
- Department of Biomedical and NeuroMotor Sciences, University of Bologna, Piazza di Porta San Donato, 2, 40126, Bologna, Italy.
- Centre for Applied Biomedical Research - CRBA, University of Bologna, St. Orsola Hospital, Bologna, Italy.
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Ramírez-Plascencia OD, Saderi N, Cárdenas-Romero S, García-García F, Peña-Escudero C, Flores-Sandoval O, Azuara-Álvarez L, Báez-Ruiz A, Salgado-Delgado R. Leptin and adiponectin regulate the activity of nuclei involved in sleep-wake cycle in male rats. Front Neurosci 2022; 16:907508. [PMID: 35937866 PMCID: PMC9355486 DOI: 10.3389/fnins.2022.907508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 07/04/2022] [Indexed: 11/13/2022] Open
Abstract
Epidemiological and experimental evidence recognize a relationship between sleep-wake cycles and adiposity levels, but the mechanisms that link both are not entirely understood. Adipose tissue secretes adiponectin and leptin hormones, mainly involved as indicators of adiposity levels and recently associated to sleep. To understand how two of the main adipose tissue hormones could influence sleep-wake regulation, we evaluated in male rats, the effect of direct administration of adiponectin or leptin in the ventrolateral preoptic nuclei (VLPO), a major area for sleep promotion. The presence of adiponectin (AdipoR1 and AdipoR2) and leptin receptors in VLPO were confirmed by immunohistochemistry. Adiponectin administration increased wakefulness during the rest phase, reduced delta power, and activated wake-promoting neurons, such as the locus coeruleus (LC), tuberomammillary nucleus (TMN) and hypocretin/orexin neurons (OX) within the lateral hypothalamus (LH) and perifornical area (PeF). Conversely, leptin promoted REM and NREM sleep, including increase of delta power during NREM sleep, and induced c-Fos expression in VLPO and melanin concentrating hormone expressing neurons (MCH). In addition, a reduction in wake-promoting neurons activity was found in the TMN, lateral hypothalamus (LH) and perifornical area (PeF), including in the OX neurons. Moreover, leptin administration reduced tyrosine hydroxylase (TH) immunoreactivity in the LC. Our data suggest that adiponectin and leptin act as hormonal mediators between the status of body energy and the regulation of the sleep-wake cycle.
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Affiliation(s)
- Oscar Daniel Ramírez-Plascencia
- Departamento de Fisiología Celular, Facultad de Ciencias, Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
- Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States
| | - Nadia Saderi
- Departamento de Fisiología Celular, Facultad de Ciencias, Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
| | - Skarleth Cárdenas-Romero
- Departamento de Fisiología Celular, Facultad de Ciencias, Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
| | - Fabio García-García
- Departamento de Biomedicina, Instituto de Ciencias de la Salud, Universidad Veracruzana, Veracruz, Mexico
| | - Carolina Peña-Escudero
- Departamento de Biomedicina, Instituto de Ciencias de la Salud, Universidad Veracruzana, Veracruz, Mexico
| | - Omar Flores-Sandoval
- Departamento de Fisiología Celular, Facultad de Ciencias, Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
| | - Lucia Azuara-Álvarez
- Departamento de Fisiología Celular, Facultad de Ciencias, Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
| | - Adrián Báez-Ruiz
- Departamento de Fisiología Celular, Facultad de Ciencias, Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
| | - Roberto Salgado-Delgado
- Departamento de Fisiología Celular, Facultad de Ciencias, Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
- *Correspondence: Roberto Salgado-Delgado,
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Liu J, Dimitrov S, Sawangjit A, Born J, Ehrlich I, Hallschmid M. Short-term high-fat feeding induces a reversible net decrease in synaptic AMPA receptors in the hypothalamus. J Nutr Biochem 2021; 87:108516. [PMID: 33022406 DOI: 10.1016/j.jnutbio.2020.108516] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 02/11/2020] [Revised: 07/09/2020] [Accepted: 09/11/2020] [Indexed: 01/05/2023]
Abstract
Dietary obesity compromises brain function, but the effects of high-fat food on synaptic transmission in hypothalamic networks, as well as their potential reversibility, are yet to be fully characterized. We investigated the impact of high-fat feeding on a hallmark of synaptic plasticity, i.e., the expression of glutamatergic α-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid receptors (AMPARs) that contain the subunits GluA1 and GluA2, in hypothalamic and cortical synaptoneurosomes of male rats. In the main experiment (experiment 1), three days, but not one day of high-fat diet (HFD) decreased the levels of AMPAR GluA1 and GluA2 subunits, as well as GluA1 phosphorylation at Ser845, in hypothalamus but not cortex. In experiment 2, we compared the effects of the three-day HFD with those a three-day HFD followed by four recovery days of normal chow. This experiment corroborated the suppressive effect of high-fat feeding on hypothalamic but not cortical AMPAR GluA1, GluA2, and GluA1 phosphorylation at Ser845, and indicated that the effects are reversed by normal-chow feeding. High-fat feeding generally increased energy intake, body weight, and serum concentrations of insulin, leptin, free fatty acids, and corticosterone; only the three-day HFD increased wakefulness assessed via video analysis. Results indicate a reversible down-regulation of hypothalamic glutamatergic synaptic strength in response to short-term high-fat feeding. Preceding the manifestation of obesity, this rapid change in glutamatergic neurotransmission may underlie counter-regulatory efforts to prevent excess body weight gain, and therefore, represent a new target of interventions to improve metabolic control.
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Affiliation(s)
- Jianfeng Liu
- Institute of Medical Psychology and Behavioral Neurobiology, University of Tübingen, Tübingen, Germany
| | - Stoyan Dimitrov
- Institute of Medical Psychology and Behavioral Neurobiology, University of Tübingen, Tübingen, Germany; German Center for Diabetes Research (DZD), Tübingen, Germany; Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University Tübingen (IDM), Tübingen, Germany
| | - Anuck Sawangjit
- Institute of Medical Psychology and Behavioral Neurobiology, University of Tübingen, Tübingen, Germany
| | - Jan Born
- Institute of Medical Psychology and Behavioral Neurobiology, University of Tübingen, Tübingen, Germany; German Center for Diabetes Research (DZD), Tübingen, Germany; Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University Tübingen (IDM), Tübingen, Germany
| | - Ingrid Ehrlich
- Hertie Institute for Clinical Brain Research and Center for Integrative Neuroscience, University of Tübingen, Tübingen, Germany; Department of Neurobiology, Institute for Biomaterials and Biomolecular Systems, University of Stuttgart, Stuttgart, Germany
| | - Manfred Hallschmid
- Institute of Medical Psychology and Behavioral Neurobiology, University of Tübingen, Tübingen, Germany; German Center for Diabetes Research (DZD), Tübingen, Germany; Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University Tübingen (IDM), Tübingen, Germany.
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Zhang F, Wang F, Yue L, Zhang H, Peng W, Hu L. Cross-Species Investigation on Resting State Electroencephalogram. Brain Topogr 2019; 32:808-824. [DOI: 10.1007/s10548-019-00723-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 06/26/2019] [Indexed: 01/15/2023]
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