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Hosseini E, Ammar A, Josephson JK, Gibson DL, Askari G, Bragazzi NL, Trabelsi K, Schöllhorn WI, Mokhtari Z. Fasting diets: what are the impacts on eating behaviors, sleep, mood, and well-being? Front Nutr 2024; 10:1256101. [PMID: 38264193 PMCID: PMC10803520 DOI: 10.3389/fnut.2023.1256101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 12/12/2023] [Indexed: 01/25/2024] Open
Abstract
Fasting diets (FDs) have drawn great attention concerning their contribution to health and disease over the last decade. Despite considerable interest in FDs, the effect of fasting diets on eating behaviors, sleep, and mood-essential components of diet satisfaction and mental health- has not been addressed comprehensively. Understanding the critical role that fasting plays in these elements will open up potential treatment avenues that have not yet been explored. The aim of the present paper was to conduct a comprehensive critical review exploring the effects of fasting on eating behaviors, sleep, and mood. There is currently a lack of clarity regarding which fasting option yields the most advantageous effects, and there is also a scarcity of consistent trials that assess the effects of FDs in a comparable manner. Similarly, the effects and/or treatment options for utilizing FDs to modify eating and sleep behaviors and enhance mood are still poorly understood. Further researches aiming at understanding the impacts of various fasting regimes, providing new insights into the gut-brain axis and offering new treatment avenues for those with resistant anxiety and depression, are warranted. Alteration of eating behaviors can have lasting effects on various physiological parameters. The use of fasting cures can underpin ancient knowledge with scientific evidence to form a new approach to the prevention and treatment of problems associated with co-morbidities or challenges pertaining to eating behaviors. Therefore, a thorough examination of the various fasting regimens and how they impact disease patterns is also warranted.
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Affiliation(s)
- Elham Hosseini
- Nutrition and Food Security Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Achraf Ammar
- Department of Training and Movement Science, Institute of Sport Science, Johannes Gutenberg-University Mainz, Mainz, Germany
- High Institute of Sport and Physical Education, University of Sfax, Sfax, Tunisia
- Research Laboratory, Molecular Bases of Human Pathology, LR19ES13, Faculty of Medicine, University of Sfax, Sfax, Tunisia
| | | | - Deanna L. Gibson
- Department of Biology, University of British Columbia, Kelowna, BC, Canada
- Faculty of Medicine, University of British Columbia, Kelowna, BC, Canada
| | - Gholamreza Askari
- Nutrition and Food Security Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
- Department of Community Nutrition, School of Nutrition and Food Science, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Nicola L. Bragazzi
- Human Nutrition Unit (HNU), Department of Food and Drugs, University of Parma, Parma, Italy
| | - Khaled Trabelsi
- High Institute of Sport and Physical Education, University of Sfax, Sfax, Tunisia
| | - Wolfgang I. Schöllhorn
- Department of Training and Movement Science, Institute of Sport Science, Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Zeinab Mokhtari
- Nutrition and Food Security Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
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2
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Yoshimura M, Flynn BP, Kershaw YM, Zhao Z, Ueta Y, Lightman SL, Conway-Campbell BL. Phase-shifting the circadian glucocorticoid profile induces disordered feeding behaviour by dysregulating hypothalamic neuropeptide gene expression. Commun Biol 2023; 6:998. [PMID: 37775688 PMCID: PMC10541449 DOI: 10.1038/s42003-023-05347-3] [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: 10/05/2021] [Accepted: 09/12/2023] [Indexed: 10/01/2023] Open
Abstract
Here we demonstrate, in rodents, how the timing of feeding behaviour becomes disordered when circulating glucocorticoid rhythms are dissociated from lighting cues; a phenomenon most commonly associated with shift-work and transmeridian travel 'jetlag'. Adrenalectomized rats are infused with physiological patterns of corticosterone modelled on the endogenous adrenal secretory profile, either in-phase or out-of-phase with lighting cues. For the in-phase group, food intake is significantly greater during the rats' active period compared to their inactive period; a feeding pattern similar to adrenal-intact control rats. In contrast, the feeding pattern of the out-of-phase group is significantly dysregulated. Consistent with a direct hypothalamic modulation of feeding behaviour, this altered timing is accompanied by dysregulated timing of anorexigenic and orexigenic neuropeptide gene expression. For Neuropeptide Y (Npy), we report a glucocorticoid-dependent direct transcriptional regulation mechanism mediated by the glucocorticoid receptor (GR). Taken together, our data highlight the adverse behavioural outcomes that can arise when two circadian systems have anti-phasic cues, in this case impacting on the glucocorticoid-regulation of a process as fundamental to health as feeding behaviour. Our findings further highlight the need for development of rational approaches in the prevention of metabolic dysfunction in circadian-disrupting activities such as transmeridian travel and shift-work.
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Affiliation(s)
- Mitsuhiro Yoshimura
- Translational Health Sciences, Bristol Medical School, University of Bristol Dorothy Hodgkin Building, Whitson Street, Bristol, BS1 3NY, UK
- Department of Physiology, University of Occupational and Environmental Health, Japan 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Benjamin P Flynn
- Translational Health Sciences, Bristol Medical School, University of Bristol Dorothy Hodgkin Building, Whitson Street, Bristol, BS1 3NY, UK
| | - Yvonne M Kershaw
- Translational Health Sciences, Bristol Medical School, University of Bristol Dorothy Hodgkin Building, Whitson Street, Bristol, BS1 3NY, UK
| | - Zidong Zhao
- Translational Health Sciences, Bristol Medical School, University of Bristol Dorothy Hodgkin Building, Whitson Street, Bristol, BS1 3NY, UK
| | - Yoichi Ueta
- Department of Physiology, University of Occupational and Environmental Health, Japan 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Stafford L Lightman
- Translational Health Sciences, Bristol Medical School, University of Bristol Dorothy Hodgkin Building, Whitson Street, Bristol, BS1 3NY, UK
| | - Becky L Conway-Campbell
- Translational Health Sciences, Bristol Medical School, University of Bristol Dorothy Hodgkin Building, Whitson Street, Bristol, BS1 3NY, UK.
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Shimizu T, Shimizu S, Higashi Y, Saito M. Psychological/mental stress-induced effects on urinary function: Possible brain molecules related to psychological/mental stress-induced effects on urinary function. Int J Urol 2021; 28:1093-1104. [PMID: 34387005 DOI: 10.1111/iju.14663] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 07/13/2021] [Indexed: 11/30/2022]
Abstract
Exposure to psychological/mental stress can affect urinary function, and lead to and exacerbate lower urinary tract dysfunctions. There is increasing evidence showing stress-induced changes not only at phenomenological levels in micturition, but also at multiple levels, lower urinary tract tissues, and peripheral and central nervous systems. The brain plays crucial roles in the regulation of the body's responses to stress; however, it is still unclear how the brain integrates stress-related information to induce changes at these multiple levels, thereby affecting urinary function and lower urinary tract dysfunctions. In this review, we introduce recent urological studies investigating the effects of stress exposure on urinary function and lower urinary tract dysfunctions, and our recent studies exploring "pro-micturition" and "anti-micturition" brain molecules related to stress responses. Based on evidence from these studies, we discuss the future directions of central neurourological research investigating how stress exposure-induced changes at peripheral and central levels affect urinary function and lower urinary tract dysfunctions. Brain molecules that we explored might be entry points into dissecting the stress-mediated process for modulating micturition.
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Affiliation(s)
- Takahiro Shimizu
- Department of Pharmacology, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan
| | - Shogo Shimizu
- Department of Pharmacology, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan
| | - Youichirou Higashi
- Department of Pharmacology, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan
| | - Motoaki Saito
- Department of Pharmacology, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan
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4
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Shimizu T, Shimizu S, Higashi Y, Yoshimura N, Saito M. [Central regulation mechanisms for stress-induced frequent urination]. Nihon Yakurigaku Zasshi 2020; 155:20-24. [PMID: 31902840 DOI: 10.1254/fpj.19110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Psychological stress can induce not only frequent urination but also exacerbation of bladder dysfunctions. However, the brain pathophysiological mechanisms underlying stress-induced effects on the micturition reflex are still unknown. Bombesin (BB)-related peptides and BB receptors in the brain have been reported to mediate and integrate stress responses. We have found that centrally administered BB induced frequent urination in rats through brain BB1 and BB2 receptors, serotoninergic nervous system/5-HT7 receptors and corticotropin-releasing factor (CRF) type1 (CRF1) receptors. Interestingly, the BB-induced frequent urination was independent of the BB-induced activation of the sympatho-adrenomedullary outflow, a representative response to stress. Because the outflow is well known to regulate micturition, the finding was very surprising. These findings indicate that brain BB1, BB2, 5-HT7 and CRF1 receptors could be new therapeutic targets for bladder dysfunction exacerbated by stress exposure.
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Affiliation(s)
- Takahiro Shimizu
- Department of Pharmacology, Kochi Medical School, Kochi University
| | - Shogo Shimizu
- Department of Pharmacology, Kochi Medical School, Kochi University
| | | | - Naoki Yoshimura
- Department of Urology, University of Pittsburgh School of Medicine
| | - Motoaki Saito
- Department of Pharmacology, Kochi Medical School, Kochi University
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Ueno H, Miyamoto T, Sanada K, Nakazono K, Tanaka K, Nishimura H, Nishimura K, Sonoda S, Yoshimura M, Maruyama T, Serino R, Otsuji Y, Ueta Y. Changes in gene expressions of hypothalamic neuropeptides controlling feeding behaviors in bilateral nephrectomized rats. Neurosci Lett 2019; 711:134426. [PMID: 31401303 DOI: 10.1016/j.neulet.2019.134426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 07/31/2019] [Accepted: 08/08/2019] [Indexed: 10/26/2022]
Abstract
Anorexia is one of the most widespread eating disorders that appears to contribute to malnutrition in patients with advanced kidney dysfunction. The changes of neuropeptides controlling feeding behaviors synthesized in the hypothalamus under several physiological condition could induce anorexia. While several mechanisms underlying uremic anorexia have been proposed, the changes of hypothalamic neuropeptides controlling feeding behaviors of uremic patients are poorly understood. The gene expressions of hypothalamic neuropeptides controlling feeding behaviors were evaluated after bilateral nephrectomy, which is a model of acute kidney dysfunction, by in situ hybridization histochemistry. Food consumption decreased markedly in bilateral nephrectomized rats. The mRNA levels of corticotrophin-releasing hormone, proopiomelanocortin, cocaine- and amphetamine-regulated transcript, which suppress feeding behavior, were significantly higher in bilateral nephrectomized rats than in sham-operated rats. On the other hand, the mRNA levels of Agouti-related peptide, neuropeptide Y, melanin-concentrating hormone, and orexin, which promote feeding behavior, were significantly lower in bilateral nephrectomized rats than in sham-operated rats. In addition, the plasma level of leptin, which has an anorexic effect, increased after bilateral nephrectomy. The results suggest that hypothalamic neuropeptides controlling feeding behaviors may be involved in the development of anorexia in bilateral nephrectomized rats. This report is the first step to elucidating the physiological mechanisms of anorexia in patients with kidney dysfunction.
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Affiliation(s)
- Hiromichi Ueno
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu 807-8555, Japan; The Second Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Kitakyushu 807-8555, Japan
| | - Tetsu Miyamoto
- The Second Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Kitakyushu 807-8555, Japan
| | - Kenya Sanada
- The Second Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Kitakyushu 807-8555, Japan
| | - Kazutoshi Nakazono
- The Second Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Kitakyushu 807-8555, Japan
| | - Kentaro Tanaka
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu 807-8555, Japan
| | - Haruki Nishimura
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu 807-8555, Japan
| | - Kazuaki Nishimura
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu 807-8555, Japan
| | - Satomi Sonoda
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu 807-8555, Japan
| | - Mitsuhiro Yoshimura
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu 807-8555, Japan
| | - Takashi Maruyama
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu 807-8555, Japan
| | - Ryota Serino
- Department of Nephrology, Yoshino Hospital, Kitakyushu 808-0034, Japan
| | - Yutaka Otsuji
- The Second Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Kitakyushu 807-8555, Japan
| | - Yoichi Ueta
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu 807-8555, Japan.
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6
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Ueno H, Serino R, Sanada K, Akiyama Y, Tanaka K, Nishimura H, Nishimura K, Sonoda S, Motojima Y, Saito R, Yoshimura M, Maruyama T, Miyamoto T, Tamura M, Otsuji Y, Ueta Y. Effects of acute kidney dysfunction on hypothalamic arginine vasopressin synthesis in transgenic rats. J Physiol Sci 2019; 69:531-541. [PMID: 30937882 PMCID: PMC10717941 DOI: 10.1007/s12576-019-00675-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 03/25/2019] [Indexed: 12/13/2022]
Abstract
Acute loss of kidney function is a critical internal stressor. Arginine vasopressin (AVP) present in the parvocellular division of the paraventricular nucleus (PVN) plays a key role in the regulation of stress responses. However, hypothalamic AVP dynamics during acute kidney dysfunction remain unclear. In this study, we investigated the effects of bilateral nephrectomy on AVP, using a transgenic rat line that expressed the AVP-enhanced green fluorescent protein (eGFP). The eGFP fluorescent intensities in the PVN were dramatically increased after bilateral nephrectomy. The mRNA levels of eGFP, AVP, and corticotrophin-releasing hormone in the PVN were dramatically increased after bilateral nephrectomy. Bilateral nephrectomy also increased the levels of Fos-like immunoreactive cells in brainstem neurons. These results indicate that bilateral nephrectomy upregulates the AVP-eGFP synthesis. Further studies are needed to identify the neural and/or humoral factors that activate AVP synthesis and regulate neuronal circuits during acute kidney dysfunction.
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Affiliation(s)
- Hiromichi Ueno
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
- The Second Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, 807-8555, Japan
| | - Ryota Serino
- Department of Nephrology, Yoshino Hospital, Kitakyushu, 808-0034, Japan
| | - Kenya Sanada
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
- The Second Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, 807-8555, Japan
| | - Yasuki Akiyama
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Kentaro Tanaka
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Haruki Nishimura
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Kazuaki Nishimura
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Satomi Sonoda
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Yasuhito Motojima
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Reiko Saito
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Mitsuhiro Yoshimura
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Takashi Maruyama
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Tetsu Miyamoto
- The Second Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, 807-8555, Japan
| | - Masahito Tamura
- The Second Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, 807-8555, Japan
| | - Yutaka Otsuji
- The Second Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, 807-8555, Japan
| | - Yoichi Ueta
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan.
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Suzuki T, Shimizu T, Kwon J, Takaoka E, Yoshikawa S, Sumino Y, Kitta T, Miyazato M, Miyake H, Yoshimura N. Role of the serotonergic system in urethral continence reflexes during sneezing in rats. Am J Physiol Renal Physiol 2018; 315:F79-F85. [PMID: 29442547 DOI: 10.1152/ajprenal.00614.2017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
To clarify the role of serotonin (5-HT) in the prevention of stress urinary incontinence (SUI) during sneezing, we investigated the effect of intraperitoneal application of p-chlorophenylalanine (PCPA; a serotonin synthesis inhibitor) and intravenous application of CP-809101 (a 5-HT2C agonist) or LP44 (a 5-HT7 agonist) using female rats, in which the neurally evoked continence reflex during sneezing was examined. Amplitudes of urethral pressure response during sneezing (A-URS), urethral baseline pressure (UBP) at the middle urethra, and sneeze-induced leak point pressure (S-LPP) were measured in normal female adult rats with or without drug administration. PCPA decreased A-URS by 35.1 cmH2O and UBP by 13.3 cmH2O compared with normal rats. In PCPA-administrated rats, CP-809101 increased A-URS by 24.1 cmH2O and UBP by 15.1 cmH2O, and LP44 also increased A-URS by 20.6 cmH2O and UBP by 11.4 cmH2O compared with rats treated with PCPA alone. SUI was observed with S-LPP of 40.1 cmH2O in PCPA-administrated rats, in which CP-809101 and LP44 increased S-LPP by 28.0 and 15.2 cmH2O, respectively, compared with rats treated with PCPA alone. The effects of CP-809101 and LP44 were antagonized by SB-242084 (a selective 5-HT2C antagonist) and SB-269970 (a selective 5-HT7 antagonist), respectively. These results indicate that activation of 5-HT receptors enhances the active urethral closure reflex during sneezing, at least in part via 5-HT2C and 5-HT7 receptors.
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Affiliation(s)
- Takahisa Suzuki
- Department of Urology, University of Pittsburgh School of Medicine , Pittsburgh, Pennsylvania.,Department of Urology, Hamamatsu University School of Medicine , Hamamatsu , Japan
| | - Takahiro Shimizu
- Department of Urology, University of Pittsburgh School of Medicine , Pittsburgh, Pennsylvania
| | - Joonbeom Kwon
- Department of Urology, University of Pittsburgh School of Medicine , Pittsburgh, Pennsylvania
| | - Eiichiro Takaoka
- Department of Urology, University of Pittsburgh School of Medicine , Pittsburgh, Pennsylvania
| | - Satoru Yoshikawa
- Department of Urology, University of Pittsburgh School of Medicine , Pittsburgh, Pennsylvania
| | - Yasuhiro Sumino
- Department of Urology, University of Pittsburgh School of Medicine , Pittsburgh, Pennsylvania
| | - Takeya Kitta
- Department of Urology, University of Pittsburgh School of Medicine , Pittsburgh, Pennsylvania
| | - Minoru Miyazato
- Department of Urology, University of Pittsburgh School of Medicine , Pittsburgh, Pennsylvania
| | - Hideaki Miyake
- Department of Urology, Hamamatsu University School of Medicine , Hamamatsu , Japan
| | - Naoki Yoshimura
- Department of Urology, University of Pittsburgh School of Medicine , Pittsburgh, Pennsylvania
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So M, Hashimoto H, Saito R, Yamamoto Y, Motojima Y, Ueno H, Sonoda S, Yoshimura M, Maruyama T, Kusuhara K, Ueta Y. Inhibition of ghrelin-induced feeding in rats by pretreatment with a novel dual orexin receptor antagonist. J Physiol Sci 2018; 68:129-136. [PMID: 28054308 PMCID: PMC6394659 DOI: 10.1007/s12576-016-0517-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Accepted: 12/22/2016] [Indexed: 12/14/2022]
Abstract
Orexin-A and -B, and ghrelin are potent orexigenic peptides. The effects of ACT462206, a novel dual orexin receptor antagonist (DORA), on ghrelin-induced feeding were examined in adult male Wistar rats. Hyperphagia induced by the intracerebroventricular (icv) administration of ghrelin was significantly suppressed for at least 2 h by pretreatment with icv administration of DORA. A marked increase was observed in the number of neurons showing Fos immunoreactivity in the paraventricular nucleus, arcuate nucleus and lateral hypothalamic area (LHA), 90 min after icv administration of ghrelin. Pretreatment with DORA significantly decreased the number of Fos-immunoreactive (IR) neurons; however, Fos immunoreactivity remained significantly increased. Double-immunostaining for Fos and orexin-A showed that many orexin-A-IR neurons in the LHA coexisted with Fos immunoreactivity after icv administration of ghrelin, but their number was reduced significantly by DORA pretreatment. These results suggest that centrally administered ghrelin may activate the orexinergic and non-orexinergic pathways responsible for the regulation of feeding.
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Affiliation(s)
- Mariko So
- Department of Health and Nutritional Care, Faculty of Medical Science, University of East Asia, Shimonoseki, 751-0807, Japan
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Hirofumi Hashimoto
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Reiko Saito
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
- Department of Pediatrics, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, 807-8555, Japan
| | - Yukiyo Yamamoto
- Department of Pediatrics, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, 807-8555, Japan
| | - Yasuhito Motojima
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Hiromichi Ueno
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Satomi Sonoda
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Mitsuhiro Yoshimura
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Takashi Maruyama
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Koichi Kusuhara
- Department of Pediatrics, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, 807-8555, Japan
| | - Yoichi Ueta
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan.
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9
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The Role of Malnutrition during Pregnancy and Its Effects on Brain and Skeletal Muscle Postnatal Development. J Funct Morphol Kinesiol 2017. [DOI: 10.3390/jfmk2030030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
“Foetal programming” refers to nutritional and hormonal variations during pregnancy. A maternal proper diet has a fundamental role in decreasing pregnancy complications and to prevent possible diseases in postnatal life. In our narrative review, we analyze and discuss the role of malnutrition during pregnancy and its effects on pre- and postnatal development of embryos. Our review proposes a comprehensive and careful analysis of the studies in this field regarding malnutrition and foetal programming. Evidence shows that nutrient imbalance before implantation may result in somatic hypoevolutism at birth, and endocrine and metabolic dysfunctions in postnatal life. In addition, the maternal malnutrition could exert a suppressive effect on the maternal and foetal immune response. It could also affect both the proliferation of myogenic precursors reducing the number of muscle fibres and the future reproductive maturation with possible consequent impaired fertility and quality of gametes. In conclusion, it is necessary to develop dietary strategies to optimize nutrition, not only during pregnancy but already when it is programmed, in order to improve the outcomes of pregnancy, promote growth, healthy child development, reduce the risk of chronic diseases, and slow down the metabolic decline associated with aging.
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10
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Shimizu T, Shimizu S, Wada N, Takai S, Shimizu N, Higashi Y, Kadekawa K, Majima T, Saito M, Yoshimura N. Brain serotoninergic nervous system is involved in bombesin-induced frequent urination through brain 5-HT 7 receptors in rats. Br J Pharmacol 2017; 174:3072-3080. [PMID: 28675470 DOI: 10.1111/bph.13941] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 06/23/2017] [Accepted: 06/26/2017] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND AND PURPOSE Psychological stress exacerbates symptoms of urinary bladder dysfunction; however, the underlying brain mechanisms are unclear. We have demonstrated that centrally administered bombesin, a stress-related neuropeptide, facilitates the rat micturition reflex. Brain bombesin-like peptides modulate the serotoninergic nervous system activity under stress conditions; therefore, we examined whether brain 5-HT is involved in the bombesin-induced increased frequency of urination in urethane-anaesthetised male Sprague-Dawley rats. EXPERIMENTAL APPROACH Evaluation of intercontraction intervals (ICI) and maximal voiding pressure (MVP) during cystometrograms were started 1 h before i.c.v. administration of bombesin or i.c.v. pretreatment with the 5-HT receptor antagonists. KEY RESULTS Bombesin (0.03 nmol per animal, i.c.v.) significantly reduced ICI without affecting MVP. The bombesin-induced response was significantly suppressed by acute depletion of brain 5-HT, which was induced by pretreatment with p-chlorophenylalanine, a 5-HT synthesis inhibitor. Bombesin at a lower dose (0.01 nmol per animal, i.c.v.) showed no significant effect on ICI, while it significantly reduced ICI in the presence of WAY-100635 (5-HT1A receptor antagonist, 0.1 or 0.3 μg per animal, i.c.v.), which can block the negative feedback control of 5-HT release. Bombesin (0.03 nmol per animal)-induced ICI reduction was significantly attenuated by SB269970 (5-HT7 receptor antagonist, 0.1 or 0.3 μg per animal, i.c.v.) but not by ritanserin (5-HT2 receptor antagonist, 0.3 or 1 μg per animal, i.c.v.). CONCLUSIONS AND IMPLICATIONS The brain serotoninergic nervous system is involved in the facilitation of the rat micturition reflex induced by bombesin-like peptides at least in part through brain 5-HT7 receptors.
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Affiliation(s)
- Takahiro Shimizu
- Department of Pharmacology, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan.,Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Shogo Shimizu
- Department of Pharmacology, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan
| | - Naoki Wada
- Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Shun Takai
- Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Nobutaka Shimizu
- Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Youichirou Higashi
- Department of Pharmacology, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan
| | - Katsumi Kadekawa
- Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Tsuyoshi Majima
- Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Motoaki Saito
- Department of Pharmacology, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan
| | - Naoki Yoshimura
- Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
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11
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Qiu B, Bell RL, Cao Y, Zhang L, Stewart RB, Graves T, Lumeng L, Yong W, Liang T. Npy deletion in an alcohol non-preferring rat model elicits differential effects on alcohol consumption and body weight. J Genet Genomics 2016; 43:421-30. [PMID: 27461754 PMCID: PMC5055068 DOI: 10.1016/j.jgg.2016.04.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2015] [Revised: 04/21/2016] [Accepted: 04/27/2016] [Indexed: 11/21/2022]
Abstract
Neuropeptide Y (NPY) is widely expressed in the central nervous system and influences many physiological processes. It is located within the rat quantitative trait locus (QTL) for alcohol preference on chromosome 4. Alcohol-nonpreferring (NP) rats consume very little alcohol, but have significantly higher NPY expression in the brain than alcohol-preferring (P) rats. We capitalized on this phenotypic difference by creating an Npy knockout (KO) rat using the inbred NP background to evaluate NPY effects on alcohol consumption. Zinc finger nuclease (ZNF) technology was applied, resulting in a 26-bp deletion in the Npy gene. RT-PCR, Western blotting and immunohistochemistry confirmed the absence of Npy mRNA and protein in KO rats. Alcohol consumption was increased in Npy(+/-) but not Npy(-/-) rats, while Npy(-/-) rats displayed significantly lower body weight when compared to Npy(+/+) rats. In whole brain tissue, expression levels of Npy-related and other alcohol-associated genes, Npy1r, Npy2r, Npy5r, Agrp, Mc3r, Mc4r, Crh and Crh1r, were significantly greater in Npy(-/-) rats, whereas Pomc and Crhr2 expressions were highest in Npy(+/-) rats. These findings suggest that the NPY-system works in close coordination with the melanocortin (MC) and corticotropin-releasing hormone (CRH) systems to modulate alcohol intake and body weight.
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Affiliation(s)
- Bin Qiu
- Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100021, China
| | - Richard L Bell
- Department of Psychiatry, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Yong Cao
- Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100021, China; Experimental Medicine Center, The First Affiliated Hospital of Sichuan Medical University, Luzhou 646000, China
| | - Lingling Zhang
- Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100021, China
| | - Robert B Stewart
- Department of Psychology, Purdue School of Science, Indiana University-Purdue University of Indianapolis, Indianapolis, IN 46202, USA
| | - Tamara Graves
- Department of Gastroenterology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Lawrence Lumeng
- Department of Gastroenterology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Weidong Yong
- Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100021, China.
| | - Tiebing Liang
- Department of Gastroenterology, Indiana University School of Medicine, Indianapolis, IN 46202, USA.
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12
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Dwarkasing JT, Marks DL, Witkamp RF, van Norren K. Hypothalamic inflammation and food intake regulation during chronic illness. Peptides 2016; 77:60-6. [PMID: 26158772 DOI: 10.1016/j.peptides.2015.06.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 05/14/2015] [Accepted: 06/22/2015] [Indexed: 02/08/2023]
Abstract
Anorexia is a common symptom in chronic illness. It contributes to malnutrition and strongly affects survival and quality of life. A common denominator of many chronic diseases is an elevated inflammatory status, which is considered to play a pivotal role in the failure of food-intake regulating systems in the hypothalamus. In this review, we summarize findings on the role of hypothalamic inflammation on food intake regulation involving hypothalamic neuropeptide Y (NPY) and pro-opiomelanocortin (POMC). Furthermore, we outline the role of serotonin in the inability of these peptide based food-intake regulating systems to respond and adapt to changes in energy metabolism during chronic disease.
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Affiliation(s)
- J T Dwarkasing
- Nutrition and Pharmacology Group, Division of Human Nutrition, Wageningen University, Wageningen, The Netherlands.
| | - D L Marks
- Department of Pediatric Endocrinology, Oregon Health & Sciences University, Portland, OR 97201, USA
| | - R F Witkamp
- Nutrition and Pharmacology Group, Division of Human Nutrition, Wageningen University, Wageningen, The Netherlands
| | - K van Norren
- Nutrition and Pharmacology Group, Division of Human Nutrition, Wageningen University, Wageningen, The Netherlands; Nutricia Research, Utrecht, The Netherlands
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13
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Laporta J, Hernandez LL. Serotonin receptor expression is dynamic in the liver during the transition period in Holstein dairy cows. Domest Anim Endocrinol 2015; 51:65-73. [PMID: 25528206 DOI: 10.1016/j.domaniend.2014.11.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Revised: 11/18/2014] [Accepted: 11/18/2014] [Indexed: 01/04/2023]
Abstract
Nonneuronal serotonin (5-HT) participates in glucose metabolism, but little is known regarding the actions of 5-HT in the liver during the transition period in dairy cattle. Here, we explore circulating patterns of 5-HT and characterize the hepatic 5-HT receptor and glucose transporter profiles around calving in multiparous Holstein dairy cows (n = 6, average lactation = 4 ± 1.9). Concentrations of serum 5-HT decreased on day -3 compared with -5 and -7 precalving (167.7 ± 80 vs 1511.1 ± 602 ng/mL). 5-HT nadir was on day -1 precalving and remained low postcalving (481.4 ± 49 ng/mL). Plasma glucose concentrations decreased precalving (P = 0.008) and were positively correlated with 5-HT during the precalving period (r = 0.55, P = 0.043). On day 1, postcalving hepatic messenger RNA expression of 5-HT1D, 2B, 3C, 6, and 7 receptors were decreased compared with day -7 (P < 0.048). The 5-HT3A and 5-HT3B decreased on day 7. The 5-HT2A increased on days 1 and 7 compared with -7 (P < 0.05). The 5-HT1F and 5-HT1A receptors were increased 2.5- and 3.8-fold on day 7, respectively, compared with days -7 and 1 (P < 0.046). The 5-HT5A was not detected, and 5-HT4 was detected on days -7 and 1 only. Expression of Glut-2,-5 and SGLT1 were decreased on days 1 and 7 compared with -7 (P < 0.05), whereas Glut-1 was increased on day 7 compared with -7 (P < 0.05). These results indicate that 5-HT could be important for liver glucose homeostasis possibly through receptor mediated signaling at specific times. Additional research is needed to further explore the functional role of these receptors in the liver during the transition from pregnancy to lactation.
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Affiliation(s)
- J Laporta
- Department of Dairy Science, University of Wisconsin, Madison, WI 53706, USA
| | - L L Hernandez
- Department of Dairy Science, University of Wisconsin, Madison, WI 53706, USA.
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14
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Musumeci G, Imbesi R, Trovato FM, Szychlinska MA, Aiello FC, Buffa P, Castrogiovanni P. Importance of serotonin (5-HT) and its precursor l-tryptophan for homeostasis and function of skeletal muscle in rats. A morphological and endocrinological study. Acta Histochem 2015; 117:267-74. [PMID: 25805417 DOI: 10.1016/j.acthis.2015.03.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 03/02/2015] [Accepted: 03/03/2015] [Indexed: 01/08/2023]
Abstract
Serotonin (5-HT) is a neurotransmitter, synthesized in serotonergic neurons of the central nervous system and in enterochromaffin cells of the gastrointestinal tract, which is involved in the regulation of several body functions, including muscle tissue development and growth and its contractile response. l-Tryptophan (l-Trp) is an essential amino acid and precursor of 5-HT. The aim of the present study was to better understand the mechanisms that govern neuroendocrine homeostasis of muscle tissue and emphasize the importance of a diet, complete in all its elements, referring specifically to the essential amino acids such as l-Trp, crucial in several neuroendocrine functions.We analyzed the possible consequences of l-Trp-free diet on 5-HT production and on skeletal muscle morphology and function in young female rats. We also evaluated the eventual alterations of hormone production such as growth hormone (GH), thyroid stimulating hormone (TSH) and thyroid hormones (T3 and T4) that control and regulate growth, metabolism and efficiency of the skeletal muscle. Our results showed a strong decrease of 5-HT, GH, TSH, T3 and T4 levels associated to a clear difference in body weight between experimental and control rats. Moreover, the muscle samples of experimental rats showed histological and ultrastructural alterations. These findings thus supported a strong link between l-Trp, serotonergic system, hormone secretion and morphology of skeletal muscle tissue and thus, the importance of a balanced daily diet.
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Affiliation(s)
- Giuseppe Musumeci
- Department of Biomedical and Biotechnological Sciences, Human Anatomy and Histology Section, School of Medicine, University of Catania, Via S. Sofia 87, 95123 Catania, Italy.
| | - Rosa Imbesi
- Department of Biomedical and Biotechnological Sciences, Human Anatomy and Histology Section, School of Medicine, University of Catania, Via S. Sofia 87, 95123 Catania, Italy
| | - Francesca Maria Trovato
- Department of Clinical and Experimental Medicine, Internal Medicine Division, University of Catania, Via S. Sofia 78, 95123 Catania, Italy
| | - Marta Anna Szychlinska
- Department of Biomedical and Biotechnological Sciences, Human Anatomy and Histology Section, School of Medicine, University of Catania, Via S. Sofia 87, 95123 Catania, Italy
| | - Flavia Concetta Aiello
- Department of Biomedical and Biotechnological Sciences, Human Anatomy and Histology Section, School of Medicine, University of Catania, Via S. Sofia 87, 95123 Catania, Italy
| | - Pietro Buffa
- Randall Division of Cell and Molecular Biophysics, King's College London, London, UK
| | - Paola Castrogiovanni
- Department of Biomedical and Biotechnological Sciences, Human Anatomy and Histology Section, School of Medicine, University of Catania, Via S. Sofia 87, 95123 Catania, Italy
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15
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Dwarkasing JT, Boekschoten MV, Argilès JM, van Dijk M, Busquets S, Penna F, Toledo M, Laviano A, Witkamp RF, van Norren K. Differences in food intake of tumour-bearing cachectic mice are associated with hypothalamic serotonin signalling. J Cachexia Sarcopenia Muscle 2015; 6:84-94. [PMID: 26136415 PMCID: PMC4435100 DOI: 10.1002/jcsm.12008] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Revised: 09/11/2014] [Accepted: 10/29/2014] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Anorexia is a common symptom among cancer patients and contributes to malnutrition and strongly impinges on quality of life. Cancer-induced anorexia is thought to be caused by an inability of food intake-regulating systems in the hypothalamus to respond adequately to negative energy balance during tumour growth. Here, we show that this impaired response of food-intake control is likely to be mediated by altered serotonin signalling and by failure in post-transcriptional neuropeptide Y (NPY) regulation. METHODS Two tumour cachectic mouse models with different food intake behaviours were used: a C26-colon adenocarcinoma model with increased food intake and a Lewis lung carcinoma model with decreased food intake. This contrast in food intake behaviour between tumour-bearing (TB) mice in response to growth of the two different tumours was used to distinguish between processes involved in cachexia and mechanisms that might be important in food intake regulation. The hypothalamus was used for transcriptomics (affymetrix chips). RESULTS In both models, hypothalamic expression of orexigenic NPY was significantly higher compared with controls, suggesting that this change does not directly reflect food intake status but might be linked to negative energy balance in cachexia. Expression of genes involved in serotonin signalling showed to be different between C26-TB mice and Lewis lung carcinoma-TB mice and was inversely associated with food intake. In vitro, using hypothalamic cell lines, serotonin repressed neuronal hypothalamic NPY secretion while not affecting messenger NPY expression, suggesting that serotonin signalling can interfere with NPY synthesis, transport, or secretion. CONCLUSIONS Altered serotonin signalling is associated with changes in food intake behaviour in cachectic TB mice. Serotonins' inhibitory effect on food intake under cancer cachectic conditions is probably via affecting the NPY system. Therefore, serotonin regulation might be a therapeutic target to prevent the development of cancer-induced eating disorders.
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Affiliation(s)
- Jvalini T Dwarkasing
- Nutrition and Pharmacology Group, Division of Human Nutrition, Wageningen University, Wageningen, The Netherlands
| | - Mark V Boekschoten
- Nutrition, Metabolism and Genomics Group, Division of Human Nutrition, Wageningen University, Wageningen, The Netherlands
| | - Joseph M Argilès
- Cancer Research Group, Departament de Bioquímica i Biologia Molecular, University of Barcelona, Barcelona, Spain
| | | | - Silvia Busquets
- Cancer Research Group, Departament de Bioquímica i Biologia Molecular, University of Barcelona, Barcelona, Spain
| | - Fabio Penna
- Cancer Research Group, Departament de Bioquímica i Biologia Molecular, University of Barcelona, Barcelona, Spain
| | - Miriam Toledo
- Cancer Research Group, Departament de Bioquímica i Biologia Molecular, University of Barcelona, Barcelona, Spain
| | | | - R F Witkamp
- Nutrition and Pharmacology Group, Division of Human Nutrition, Wageningen University, Wageningen, The Netherlands
| | - Klaske van Norren
- Nutrition and Pharmacology Group, Division of Human Nutrition, Wageningen University, Wageningen, The Netherlands.,Nutricia Research, Utrecht, The Netherlands
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16
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Kirbaeva NV, Kulakova SN, Baturina VA, Karagodina ZV, Sharanova NE, Pertsov SS, Vasil'ev AV. Biochemical changes in rats with different behavioral characteristics under conditions of metabolic stress. Bull Exp Biol Med 2015; 158:434-9. [PMID: 25711664 DOI: 10.1007/s10517-015-2779-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Indexed: 10/23/2022]
Abstract
Food deprivation is an extreme state of the functional feeding system, which is reflected in the character of changes in the activity of central and peripheral components selectively included in the system. We studied the dynamics of coenzyme Q10 levels and spectrum of omega-3 and omega-6 polyunsaturated fatty acids in the blood serum, liver, and brain as well as LPO intensity in the serum and liver in behaviorally passive and active rats under conditions of food deprivation. Our results indicate that adaptive and compensatory processes during acute metabolic stress depend on the initial behavioral characteristics of the animals.
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Affiliation(s)
- N V Kirbaeva
- Research Institute of Nutrition, Russian Academy of Medical Sciences, Moscow, Russia,
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17
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Nishimura Y, Mabuchi K, Taguchi S, Ikeda S, Aida E, Negishi H, Takamata A. Involvement of orexin-A neurons but not melanin-concentrating hormone neurons in the short-term regulation of food intake in rats. J Physiol Sci 2014; 64:203-11. [PMID: 24676683 PMCID: PMC10718040 DOI: 10.1007/s12576-014-0312-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Accepted: 03/13/2014] [Indexed: 11/26/2022]
Abstract
In order to elucidate the involvement of melanin-concentrating hormone (MCH) and orexin-A (ORX-A) neurons of the perifornical/lateral hypothalamic areas (PF/LH) in the regulation of food intake induced by acutely reduced glucose availability, we examined the food intake response and c-Fos expression in the MCH and ORX-A neurons in the PF/LH during 2-deoxy-D-glucose (2DG)-induced glucoprivation (400 mg/kg; i.v.) and systemic insulin-induced hypoglycemia (5 U/kg; s.c.) in male Wistar rats. The administration of both 2DG and insulin stimulated food intake and induced c-Fos expression in the ORX-A neurons corresponding to food intake, but not in the MCH neurons. These data indicate that ORX-A neurons, but not MCH neurons, play a role in the short-term regulation of food intake, and that the input signals for the neurons containing MCH and ORX-A are different, and these neurons play different roles in the regulation of feeding behavior.
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Affiliation(s)
- Yuri Nishimura
- Department of Environmental Health, Nara Women’s University, Kitauoya Nishimachi, Nara, 630-8506 Japan
| | - Kaori Mabuchi
- Department of Environmental Health, Nara Women’s University, Kitauoya Nishimachi, Nara, 630-8506 Japan
| | - Sayumi Taguchi
- Department of Environmental Health, Nara Women’s University, Kitauoya Nishimachi, Nara, 630-8506 Japan
| | - Saori Ikeda
- Department of Environmental Health, Nara Women’s University, Kitauoya Nishimachi, Nara, 630-8506 Japan
| | - Eri Aida
- Department of Environmental Health, Nara Women’s University, Kitauoya Nishimachi, Nara, 630-8506 Japan
| | - Hiroko Negishi
- Department of Environmental Health, Nara Women’s University, Kitauoya Nishimachi, Nara, 630-8506 Japan
| | - Akira Takamata
- Department of Environmental Health, Nara Women’s University, Kitauoya Nishimachi, Nara, 630-8506 Japan
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