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Rodrigues KC, Bortolatto CF, da Motta KP, de Oliveira RL, Paltian JJ, Krüger R, Roman SS, Boeira SP, Alves D, Wilhelm EA, Luchese C. The neurotherapeutic role of a selenium-functionalized quinoline in hypothalamic obese rats. Psychopharmacology (Berl) 2021; 238:1937-1951. [PMID: 33740091 DOI: 10.1007/s00213-021-05821-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 03/08/2021] [Indexed: 12/30/2022]
Abstract
RATIONALE Obesity is considered one of the major global health problems and increases the risk of several medical complications, such as diabetes and mental illnesses. OBJECTIVE The present study investigated the effect of 7-chloro-4-(phenylselanyl) quinoline (4-PSQ) on obesity parameters, behavioral and neurochemical alterations in hypothalamic obese rats. METHODS Male Wistar rats received subcutaneous neonatal injections of monosodium glutamate (MSG, 4g/kg) or saline. After the Lee Index evaluation, rats were divided into groups and treated with 4-PSQ (5 mg/kg, intragastric route) or canola oil once a day (post-natal days (PND) 60→76). Open-field, elevated plus-maze, forced swim task, object recognition/location memory, and stepdown inhibitory avoidance tasks were conducted from PND 66 to 74. On PND 76, rats were euthanized and epididymal fat, blood, cerebral cortex, andhippocampus were removed. Blood biochemical parameters and cortical/hippocampal acetylcholinesterase (AChE) and Na /K -ATPase activities were assessed. RESULTS MSG increased the Lee Index characterizing the chemically induced hypothalamic obesity model. 4-PSQ reversed the increases of epididymal fat, blood glucose, and triglyceride levels caused by MSG exposure. 4-PSQ attenuated anxiety-like and depression-like behaviors induced by neonatal administrations of MSG. Memory deficits found in MSG-obese rats were reversed by treatment with 4-PSQ. Neurochemical alterations produced by MSG evidenced by stimulation ofNa+/K+-ATPase and AChE activities in the cerebral cortex and hippocampus of rats were normalized by 4-PSQ treatment. CONCLUSIONS In brief, 4-PSQ therapy improved hypothalamic obesity-related parameters, as well as psychiatric symptoms, cognitive impairment, and neurochemical alterations found in obese rats.
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Affiliation(s)
- Karline C Rodrigues
- Programa de Pós-graduação em Bioquímica e Bioprospecção, Laboratório de Pesquisa em Farmacologia Bioquímica (LaFarBio), Grupo de Pesquisa em Neurobiotecnologia (GPN), Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas (UFPel), Campus Capão do Leão, Pelotas, RS, CEP 96010-900, Brazil
| | - Cristiani F Bortolatto
- Programa de Pós-graduação em Bioquímica e Bioprospecção, Laboratório de Bioquímica e Neurofarmacologia Molecular (LABIONEM), Grupo de Pesquisa em Neurobiotecnologia (GPN), Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas (UFPel), Pelotas, RS, CEP 96010-900, Brazil
| | - Ketlyn P da Motta
- Programa de Pós-graduação em Bioquímica e Bioprospecção, Laboratório de Pesquisa em Farmacologia Bioquímica (LaFarBio), Grupo de Pesquisa em Neurobiotecnologia (GPN), Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas (UFPel), Campus Capão do Leão, Pelotas, RS, CEP 96010-900, Brazil
| | - Renata L de Oliveira
- Programa de Pós-graduação em Bioquímica e Bioprospecção, Laboratório de Pesquisa em Farmacologia Bioquímica (LaFarBio), Grupo de Pesquisa em Neurobiotecnologia (GPN), Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas (UFPel), Campus Capão do Leão, Pelotas, RS, CEP 96010-900, Brazil
| | - Jaini J Paltian
- Programa de Pós-graduação em Bioquímica e Bioprospecção, Laboratório de Pesquisa em Farmacologia Bioquímica (LaFarBio), Grupo de Pesquisa em Neurobiotecnologia (GPN), Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas (UFPel), Campus Capão do Leão, Pelotas, RS, CEP 96010-900, Brazil
| | - Roberta Krüger
- Programa de Pós-graduação em Química, Laboratório de Síntese Orgânica Limpa - LASOL, Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas (UFPel), P.O. Box 354, Pelotas, RS, 96010-900, Brazil
| | - Silvane S Roman
- Universidade Regional Integrada, Campus Erechim, Erechim, RS, CEP 99700-000, Brazil
| | - Silvana P Boeira
- Laboratório de Avaliações Farmacológicas e Toxicológicas Aplicadas às Moléculas Bioativas, LaftamBio Pampa, Universidade Federal do Pampa, Itaqui, RS, CEP 97650-000, Brazil
| | - Diego Alves
- Programa de Pós-graduação em Química, Laboratório de Síntese Orgânica Limpa - LASOL, Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas (UFPel), P.O. Box 354, Pelotas, RS, 96010-900, Brazil
| | - Ethel Antunes Wilhelm
- Programa de Pós-graduação em Bioquímica e Bioprospecção, Laboratório de Pesquisa em Farmacologia Bioquímica (LaFarBio), Grupo de Pesquisa em Neurobiotecnologia (GPN), Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas (UFPel), Campus Capão do Leão, Pelotas, RS, CEP 96010-900, Brazil.
| | - Cristiane Luchese
- Programa de Pós-graduação em Bioquímica e Bioprospecção, Laboratório de Pesquisa em Farmacologia Bioquímica (LaFarBio), Grupo de Pesquisa em Neurobiotecnologia (GPN), Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas (UFPel), Campus Capão do Leão, Pelotas, RS, CEP 96010-900, Brazil.
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Proteomic study of hypothalamus in pigs exposed to heat stress. BMC Vet Res 2020; 16:286. [PMID: 32787853 PMCID: PMC7424663 DOI: 10.1186/s12917-020-02505-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 07/30/2020] [Indexed: 11/17/2022] Open
Abstract
Background With evidence of warming climates, it is important to understand the effects of heat stress in farm animals in order to minimize production losses. Studying the changes in the brain proteome induced by heat stress may aid in understanding how heat stress affects brain function. The hypothalamus is a critical region in the brain that controls the pituitary gland, which is responsible for the secretion of several important hormones. In this study, we examined the hypothalamic protein profile of 10 pigs (15 ± 1 kg body weight), with five subjected to heat stress (35 ± 1 °C; relative humidity = 90%) and five acting as controls (28 ± 3 °C; RH = 90%). Result The isobaric tags for relative and absolute quantification (iTRAQ) analysis of the hypothalamus identified 1710 peptides corresponding to 360 proteins, including 295 differentially expressed proteins (DEPs), 148 of which were up-regulated and 147 down-regulated, in heat-stressed animals. The Ingenuity Pathway Analysis (IPA) software predicted 30 canonical pathways, four functional groups, and four regulatory networks of interest. The DEPs were mainly concentrated in the cytoskeleton of the pig hypothalamus during heat stress. Conclusions In this study, heat stress significantly increased the body temperature and reduced daily gain of body weight in pigs. Furthermore, we identified 295 differentially expressed proteins, 147 of which were down-regulated and 148 up-regulated in hypothalamus of heat stressed pigs. The IPA showed that the DEPs identified in the study are involved in cell death and survival, cellular assembly and organization, and cellular function and maintenance, in relation to neurological disease, metabolic disease, immunological disease, inflammatory disease, and inflammatory response. We hypothesize that a malfunction of the hypothalamus may destroy the host physical and immune function, resulting in decreased growth performance and immunosuppression in heat stressed pigs.
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Menezes L, de Moraes DA, Ribeiro-Silva N, Silva SMA, Suchecki D, Luz J. Chronic REM sleep restriction in young rats increases energy expenditure with no change in food intake. Exp Physiol 2020; 105:1339-1348. [PMID: 32589295 DOI: 10.1113/ep088474] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 06/23/2020] [Indexed: 12/19/2022]
Abstract
NEW FINDINGS What is the central question of this study? What are the effects of different periods of REM sleep restriction (7, 14 and 21 days) on metabolic parameters in young rats? What is the main finding and its importance? Animals submitted to each period of REM sleep deprivation showed a negative energy balance, with reduced body weight gain, body energy gain and gross food efficiency, less body fat content, and increased energy expenditure. There was no increase in food intake after any of the REM sleep restriction periods. In young rats, negative energy balance is not compensated by increased dietary intake as observed in adult rats. ABSTRACT Reduced sleep is associated with metabolic alterations, not only in adults, but also in children and adolescents. Several studies have shown that sleep restricted (SR) adult rats exhibit metabolic changes, followed by increased food intake, but few have evaluated these functions in young animals. The aim of the present study was to establish the metabolic parameters of young rats subjected to different periods of REM sleep restriction and to propose a correction factor for the correct measurement of food intake. Young male Wistar rats were distributed in control and SR groups for 7, 14 or 21 days. Sleep restriction was performed by the single platform method for 18 h. Regardless of the length of sleep restriction, all SR rats had a negative energy balance, evidenced by reduction in body weight gain, body energy gain and gross food efficiency, accompanied by increased energy expenditure. In addition, sleep restriction reduced body fat content throughout the entire period. Discounting food spillage, there was no increase in food intake by SR rats. In conclusion, the present study revealed metabolic changes in SR young rats after different lengths of REM sleep restriction and that weight loss and increased energy expenditure were not compensated by increased dietary intake as occurs in adult rats, indicating that young rats use other mechanisms to cope with the negative energy balance caused by sleep restriction. In addition, we propose a correction factor for food intake, to prevent overestimation of this parameter, due to food spillage in the water containers.
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Affiliation(s)
- Letícia Menezes
- Department of Phisiology, Universidade Federal de São Paulo, São Paulo, Brazil
| | | | - Neila Ribeiro-Silva
- Department of Phisiology, Universidade Federal de São Paulo, São Paulo, Brazil
| | | | - Deborah Suchecki
- Department of Psychobiology, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Jacqueline Luz
- Department of Phisiology, Universidade Federal de São Paulo, São Paulo, Brazil
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Onaolapo AY, Ayeni OJ, Ogundeji MO, Ajao A, Onaolapo OJ, Owolabi AR. Subchronic ketamine alters behaviour, metabolic indices and brain morphology in adolescent rats: Involvement of oxidative stress, glutamate toxicity and caspase-3-mediated apoptosis. J Chem Neuroanat 2018; 96:22-33. [PMID: 30529750 DOI: 10.1016/j.jchemneu.2018.12.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Revised: 11/07/2018] [Accepted: 12/06/2018] [Indexed: 12/16/2022]
Abstract
Ketamine is a dissociative anaesthetic agent whose recreational use amongst adolescents and young adults is reaching epidemic proportions in a number of countries. While animal studies have examined the long-term detrimental effects of early-life ketamine exposure, there is a paucity of information on the immediate effects of ketamine following subchronic administration in the adolescence period. Adolescent rats were assigned into four groups of 10 animals each, administered intraperitoneal (i.p) injections of vehicle or one of three doses of ketamine (7.5, 15 or 30 mg/kg daily) for 8 weeks, and then exposed to behavioural paradigms. Rats were then euthanised after an overnight fast, and blood taken was used for measurement of metabolic indices. The brains were dissected out and either homogenised for estimation of neurochemical parameters, or processed for histological and immunohistochemical studies. Results showed that subchronic administration of ketamine was associated with a lesser weight gain inspite of an increase in food intake across the treatment groups. There was a dose-dependent increase in open-field novelty-induced behaviours, a decline in spatial working-memory, and an anxiolytic effect in the elevated-plus maze. There was associated derangement of serum triglyceride, and increase in brain glutamate levels, acetylcholinesterase activity, plasma/brain oxidative stress parameters, caspase-3 activity and biochemical indices of hepatic and renal function. Ketamine administration was also associated with neurodegenerative changes in the cerebral cortex, hippocampus, cerebellum and the pons. In conclusion, subchronic administration of ketamine to adolescent rats was associated with dose-related memory loss, oxidative stress and possibly caspase-3 mediated neurodegenerative changes.
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Affiliation(s)
- A Y Onaolapo
- Behavioural Neuroscience and Neurobiology Unit, Department of Anatomy, Ladoke Akintola University of Technology, Ogbomoso, Oyo State, Nigeria.
| | - O J Ayeni
- Department of Anatomy, Ladoke Akintola University of Technology, Ogbomoso, Oyo State, Nigeria
| | - M O Ogundeji
- Department of Chemical Pathology, LAUTECH Teaching Hospital, Osogbo, Osun State, Nigeria
| | - A Ajao
- Department of Morbid Anatomy and Histopathology, LAUTECH Teaching Hospital, Osogbo, Osun State, Nigeria
| | - O J Onaolapo
- Behavioural Neuroscience and Neuropharmacology Unit, Department of Pharmacology, Ladoke Akintola University of Technology, Osogbo, Osun State, Nigeria.
| | - A R Owolabi
- Department of Medical Pharmacology and Therapeutics, Obafemi Awolowo University, Ile-Ife, Osun State, Nigeria.
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Pedroso AP, Souza AP, Dornellas APS, Oyama LM, Nascimento CMO, Santos GMS, Rosa JC, Bertolla RP, Klawitter J, Christians U, Tashima AK, Ribeiro EB. Intrauterine Growth Restriction Programs the Hypothalamus of Adult Male Rats: Integrated Analysis of Proteomic and Metabolomic Data. J Proteome Res 2017; 16:1515-1525. [PMID: 28314371 DOI: 10.1021/acs.jproteome.6b00923] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Programming of hypothalamic functions regulating energy homeostasis may play a role in intrauterine growth restriction (IUGR)-induced adulthood obesity. The present study investigated the effects of IUGR on the hypothalamus proteome and metabolome of adult rats submitted to 50% protein-energy restriction throughout pregnancy. Proteomic and metabolomic analyzes were performed by data independent acquisition mass spectrometry and multiple reaction monitoring, respectively. At age 4 months, the restricted rats showed elevated adiposity, increased leptin and signs of insulin resistance. 1356 proteins were identified and 348 quantified while 127 metabolites were quantified. The restricted hypothalamus showed down-regulation of 36 proteins and 5 metabolites and up-regulation of 21 proteins and 9 metabolites. Integrated pathway analysis of the proteomics and metabolomics data indicated impairment of hypothalamic glucose metabolism, increased flux through the hexosamine pathway, deregulation of TCA cycle and the respiratory chain, and alterations in glutathione metabolism. The data suggest IUGR modulation of energy metabolism and redox homeostasis in the hypothalamus of male adult rats. The present results indicated deleterious consequences of IUGR on hypothalamic pathways involved in pivotal physiological functions. These results provide guidance for future mechanistic studies assessing the role of intrauterine malnutrition in the development of metabolic diseases later in life.
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Affiliation(s)
- Amanda P Pedroso
- Department of Physiology, Universidade Federal de São Paulo UNIFESP , São Paulo, SP 04021-001, Brazil
| | - Adriana P Souza
- Department of Physiology, Universidade Federal de São Paulo UNIFESP , São Paulo, SP 04021-001, Brazil
| | - Ana P S Dornellas
- Department of Physiology, Universidade Federal de São Paulo UNIFESP , São Paulo, SP 04021-001, Brazil
| | - Lila M Oyama
- Department of Physiology, Universidade Federal de São Paulo UNIFESP , São Paulo, SP 04021-001, Brazil
| | - Cláudia M O Nascimento
- Department of Physiology, Universidade Federal de São Paulo UNIFESP , São Paulo, SP 04021-001, Brazil
| | - Gianni M S Santos
- Division of Applied Statistics, Universidade Federal de São Paulo UNIFESP , São Paulo, SP 04021-001, Brazil
| | - José C Rosa
- Protein Chemistry Center, Department of Molecular and Cell Biology, Ribeirão Preto Medical School, Universidade de São Paulo , Ribeirão Preto, SP 03178-200, Brazil
| | - Ricardo P Bertolla
- Department of Surgery, Universidade Federal de São Paulo UNIFESP , São Paulo, SP 04021-001, Brazil
| | - Jelena Klawitter
- iC42 Clinical Research and Development, Department of Anesthesiology, University of Colorado Denver , Anschutz Medical Campus, Aurora, Colorado 80045, United States
| | - Uwe Christians
- iC42 Clinical Research and Development, Department of Anesthesiology, University of Colorado Denver , Anschutz Medical Campus, Aurora, Colorado 80045, United States
| | - Alexandre K Tashima
- Department of Biochemistry, Universidade Federal de São Paulo UNIFESP , São Paulo, SP 04021-001, Brazil
| | - Eliane B Ribeiro
- Department of Physiology, Universidade Federal de São Paulo UNIFESP , São Paulo, SP 04021-001, Brazil
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Diet-induced obesity impairs hypothalamic glucose sensing but not glucose hypothalamic extracellular levels, as measured by microdialysis. Nutr Diabetes 2015; 5:e162. [PMID: 26075639 PMCID: PMC4491853 DOI: 10.1038/nutd.2015.12] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 04/09/2015] [Accepted: 04/22/2015] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND/OBJECTIVES Glucose from the diet may signal metabolic status to hypothalamic sites controlling energy homeostasis. Disruption of this mechanism may contribute to obesity but its relevance has not been established. The present experiments aimed at evaluating whether obesity induced by chronic high-fat intake affects the ability of hypothalamic glucose to control feeding. We hypothesized that glucose transport to the hypothalamus as well as glucose sensing and signaling could be impaired by high-fat feeding. SUBJECTS/METHODS Female Wistar rats were studied after 8 weeks on either control or high-lard diet. Daily food intake was measured after intracerebroventricular (i.c.v.) glucose. Glycemia and glucose content of medial hypothalamus microdialysates were measured in response to interperitoneal (i.p.) glucose or meal intake after an overnight fast. The effect of refeeding on whole hypothalamus levels of glucose transporter proteins (GLUT) 1, 2 and 4, AMPK and phosphorylated AMPK levels was determined by immunoblotting. RESULTS High-fat rats had higher body weight and fat content and serum leptin than control rats, but normal insulin levels and glucose tolerance. I.c.v. glucose inhibited food intake in control but failed to do so in high-fat rats. Either i.p. glucose or refeeding significantly increased glucose hypothalamic microdialysate levels in the control rats. These levels showed exacerbated increases in the high-fat rats. GLUT1 and 4 levels were not affected by refeeding. GLUT2 levels decreased and phosphor-AMPK levels increased in the high-fat rats but not in the controls. CONCLUSIONS The findings suggest that, in the high-fat rats, a defective glucose sensing by decreased GLUT2 levels contributed to an inappropriate activation of AMPK after refeeding, despite increased extracellular glucose levels. These derangements were probably involved in the abolition of hypophagia in response to i.c.v. glucose. It is proposed that 'glucose resistance' in central sites of feeding control may be relevant in the disturbances of energy homeostasis induced by high-fat feeding.
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Proença RDCP, Prado SD, Carvalho KMBD, Amparo-Santos L. Conceptual and methodological aspects in clinical and epidemiologic studies: Contributions to the scientific Field of Food and Nutrition in Brazil. REV NUTR 2014. [DOI: 10.1590/1415-5273201400050001e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Rossana da Costa Pacheco Proença
- Fórum Nacional de Coordenadores de Programas de Pós-Graduação em Alimentação e Nutrição, Brasil; Universidade Federal de Santa Catarina, Brasil
| | - Shirley Donizete Prado
- Fórum Nacional de Coordenadores de Programas de Pós-Graduação em Alimentação e Nutrição, Brasil; Universidade do Estado do Rio de Janeiro, Brasil
| | - Kenia Mara Baiocchi de Carvalho
- Fórum Nacional de Coordenadores de Programas de Pós-Graduação em Alimentação e Nutrição, Brasil; Universidade de Brasília, Brasil
| | - Ligia Amparo-Santos
- Fórum Nacional de Coordenadores de Programas de Pós-Graduação em Alimentação e Nutrição, Brasil; Universidade Federal da Bahia, Brasil
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Telles MM, da Silva TG, Watanabe RLH, de Andrade IS, Estadella D, Nascimento CMO, Oyama LM, Ribeiro EB. Lateral hypothalamic serotonin is not stimulated during central leptin hypophagia. REGULATORY PEPTIDES 2013; 184:75-80. [PMID: 23518461 DOI: 10.1016/j.regpep.2013.03.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Revised: 09/12/2012] [Accepted: 03/03/2013] [Indexed: 10/27/2022]
Abstract
Whether leptin targets the hypothalamic serotonergic system to inhibit food intake is not established. We examined the effect of a short-term i.c.v. leptin treatment on serotonin microdialysate levels in rat lateral hypothalamus. Adipose tissue gene expression was also evaluated. Male rats received four daily injections of leptin (5 μg) or vehicle (with pair-feeding to leptin-induced intake) and a fifth injection during collection of LH microdialysates. We found that serotonin and 5-HIAA levels were not affected by the leptin pre-treatment, as basal levels were similar between the leptin and the pair-fed group. These levels remained unaltered after the acute leptin injection. For gene expression studies, rats were pre-treated with five daily injections of either leptin (5 μg) or vehicle (with either pair-feeding or ad libitum intake). mRNA levels of resistin, adiponectin, lipoprotein lipase, and PPAR-gamma were unaltered by either leptin or pair-feeding. Leptin gene expression was significantly reduced by leptin but not by pair-feeding, in both the retroperitoneal (-74%) and the epididymal (-99%) depots while no differences were observed in the subcutaneous depot. The observations confirmed the absence of an acute stimulatory effect of central leptin on serotonin release in the lateral hypothalamus and showed that the pre-treatment with leptin failed to modify this pattern. This indicates that components of the serotonergic system are probably not directly affected by leptin. Additionally, the central effect of leptin was able to downregulate its own adipose tissue gene expression in a depot-specific manner while other adipokine genes were not affected.
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Affiliation(s)
- Mônica Marques Telles
- Departamento de Fisiologia, Disciplina de Fisiologia da Nutrição, Universidade Federal de São Paulo (UNIFESP), São Paulo/SP, Brazil
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High-fat fish oil diet prevents hypothalamic inflammatory profile in rats. ISRN INFLAMMATION 2013; 2013:419823. [PMID: 24049658 PMCID: PMC3767199 DOI: 10.1155/2013/419823] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2013] [Accepted: 01/30/2013] [Indexed: 12/19/2022]
Abstract
Whether PUFA diets affect inflammatory mediators in central and peripheral sites is not clear. We investigated the effect of high-fat PUFA diets on the expression of proteins involved in inflammatory pathways in hypothalamus, muscle, and liver. Male rats were fed for 2 months with either chow or high-fat diets enriched with either soy (n-6 PUFAs) or fish oil (n-3 PUFAs). The fish group had normal body weight, low serum NEFA, reduced hypothalamic levels of TNF-α, IL-6, and TRAF6, and increased levels of IL-10 receptor. In contrast, the soy group had increased body weight and hypothalamic levels of TRAF6 and NFκBp65. In muscle, the fish diet reduced TNF-α and IL-6 levels. Both PUFA diets increased muscle IL-10 levels and reduced liver TNF-α and IL-6 levels. The data showed that the high-fat soy diet induced activation of the hypothalamic NFκB inflammatory pathway, a feature predisposing to feeding and energy expenditure disturbances associated with the development of obesity. On the other hand, the high-fat fish diet improved the central and the peripheral inflammatory profile via reduction of intracellular inflammatory mediators, suggesting a protection against obesity.
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Wang S, Khondowe P, Chen S, Yu J, Shu G, Zhu X, Wang L, Gao P, Xi Q, Zhang Y, Jiang Q. Effects of "Bioactive" amino acids leucine, glutamate, arginine and tryptophan on feed intake and mRNA expression of relative neuropeptides in broiler chicks. J Anim Sci Biotechnol 2012; 3:27. [PMID: 22958345 PMCID: PMC3494553 DOI: 10.1186/2049-1891-3-27] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2012] [Accepted: 08/17/2012] [Indexed: 12/20/2022] Open
Abstract
Feed intake control is vital to ensuring optimal nutrition and achieving full potential for growth and development in poultry. The aim of the present study was to investigate the effects of L-leucine, L-glutamate, L-tryptophan and L-arginine on feed intake and the mRNA expression levels of hypothalamic Neuropeptide involved in feed intake regulation in broiler chicks. Leucine, glutamate, tryptophan or arginine was intra-cerebroventricularly (ICV) administrated to 4d-old broiler chicks respectively and the feed intake were recorded at various time points. Quantitative PCR was performed to determine the hypothalamic mRNA expression levels of Neuropeptide Y (NPY), agouti related protein (AgRP), pro-opiomelanocortin (POMC), melanocortin receptor 4 (MC4R) and corticotrophin releasing factor (CRF). Our results showed that ICV administration of L-leucine (0.15 or 1.5 μmol) significantly (P < 0.05) increased feed intake up to 2 h post-administration period and elevated both hypothalamic NPY and AgRP mRNA expression levels. In contrast, ICV administration of L-glutamate (1.6 μmol) significantly (P < 0.05) decreased feed intake 0.25, 0.5 and 2 h post-injection, and increased hypothalamic CRF and MC4R mRNA expression levels. Meanwhile, both L-tryptophan (10 or 100 μg) and L-arginine (20 or 200 μg) had no significant effect on feed intake. These findings suggested that L-leucine and L-glutamate could act within the hypothalamus to influence food intake, and that both orexigenic and anorexigenic Neuropeptide genes might contribute directly to these effects.
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Affiliation(s)
- Songbo Wang
- College of Animal Sciences, South China Agricultural University, Guangzhou, 510642, P. R. China
| | - Paul Khondowe
- College of Animal Sciences, South China Agricultural University, Guangzhou, 510642, P. R. China.,School of Natural Sciences, Department of Biological Sciences, University of Zambia, P.O. Box 32379, Lusaka, Zambia
| | - Shengfeng Chen
- College of Animal Sciences, South China Agricultural University, Guangzhou, 510642, P. R. China
| | - Jianjian Yu
- College of Animal Sciences, South China Agricultural University, Guangzhou, 510642, P. R. China
| | - Gang Shu
- College of Animal Sciences, South China Agricultural University, Guangzhou, 510642, P. R. China
| | - Xiaotong Zhu
- College of Animal Sciences, South China Agricultural University, Guangzhou, 510642, P. R. China
| | - Lina Wang
- College of Animal Sciences, South China Agricultural University, Guangzhou, 510642, P. R. China
| | - Ping Gao
- College of Animal Sciences, South China Agricultural University, Guangzhou, 510642, P. R. China
| | - Qianyun Xi
- College of Animal Sciences, South China Agricultural University, Guangzhou, 510642, P. R. China
| | - Yongliang Zhang
- College of Animal Sciences, South China Agricultural University, Guangzhou, 510642, P. R. China
| | - Qingyan Jiang
- College of Animal Sciences, South China Agricultural University, Guangzhou, 510642, P. R. China
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Pimentel GD, Dornellas APS, Rosa JC, Lira FS, Cunha CA, Boldarine VT, de Souza GIH, Hirata AE, Nascimento CMO, Oyama LM, Watanabe RLH, Ribeiro EB. High-fat diets rich in soy or fish oil distinctly alter hypothalamic insulin signaling in rats. J Nutr Biochem 2012; 23:822-8. [PMID: 21852082 DOI: 10.1016/j.jnutbio.2011.04.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2010] [Revised: 02/24/2011] [Accepted: 04/08/2011] [Indexed: 11/30/2022]
Abstract
Hypothalamic insulin inhibits food intake, preventing obesity. High-fat feeding with polyunsaturated fats may be obesogenic, but their effect on insulin action has not been elucidated. The present study evaluated insulin hypophagia and hypothalamic signaling after central injection in rats fed either control diet (15% energy from fat) or high-fat diets (50% energy from fat) enriched with either soy or fish oil. Soy rats had increased fat pad weight and serum leptin with normal body weight, serum lipid profile and peripheral insulin sensitivity. Fish rats had decreased body and fat pad weight, low leptin and corticosterone levels, and improved serum lipid profile. A 20-mU dose of intracerebroventricular (ICV) insulin inhibited food intake in control and fish groups, but failed to do so in the soy group. Hypothalamic protein levels of IR, IRS-1, IRS-2, Akt, mTOR, p70S6K and AMPK were similar among groups. ICV insulin stimulated IR tyrosine phosphorylation in control (68%), soy (36%) and fish (34%) groups. Tyrosine phosphorylation of the pp185 band was significantly stimulated in control (78%) and soy (53%) rats, but not in fish rats. IRS-1 phosphorylation was stimulated only in control rats (94%). Akt serine phosphorylation was significantly stimulated only in control (90%) and fish (78%) rats. The results showed that, rather than the energy density, the fat type was a relevant aspect of high-fat feeding, since blockade of hypothalamic insulin signal transmission and insulin hypophagia was promoted only by the high-fat soy diet, while they were preserved in the rats fed with the high-fat fish diet.
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Affiliation(s)
- Gustavo D Pimentel
- Disciplina de Fisiologia da Nutrição, Departamento de Fisiologia, Universidade Federal de São Paulo-UNIFESP, CEP 04023-062 São Paulo/SP, Brazil
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Pedroso AP, Watanabe RLH, Albuquerque KT, Telles MM, Andrade MCC, Perez JD, Sakata MM, Lima ML, Estadella D, Nascimento CMO, Oyama LM, Rosa JC, Casarini DE, Ribeiro EB. Proteomic profiling of the rat hypothalamus. Proteome Sci 2012; 10:26. [PMID: 22519962 PMCID: PMC3441799 DOI: 10.1186/1477-5956-10-26] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2011] [Accepted: 04/20/2012] [Indexed: 11/10/2022] Open
Abstract
Background The hypothalamus plays a pivotal role in numerous mechanisms highly relevant to the maintenance of body homeostasis, such as the control of food intake and energy expenditure. Impairment of these mechanisms has been associated with the metabolic disturbances involved in the pathogenesis of obesity. Since rodent species constitute important models for metabolism studies and the rat hypothalamus is poorly characterized by proteomic strategies, we performed experiments aimed at constructing a two-dimensional gel electrophoresis (2-DE) profile of rat hypothalamus proteins. Results As a first step, we established the best conditions for tissue collection and protein extraction, quantification and separation. The extraction buffer composition selected for proteome characterization of rat hypothalamus was urea 7 M, thiourea 2 M, CHAPS 4%, Triton X-100 0.5%, followed by a precipitation step with chloroform/methanol. Two-dimensional (2-D) gels of hypothalamic extracts from four-month-old rats were analyzed; the protein spots were digested and identified by using tandem mass spectrometry and database query using the protein search engine MASCOT. Eighty-six hypothalamic proteins were identified, the majority of which were classified as participating in metabolic processes, consistent with the finding of a large number of proteins with catalytic activity. Genes encoding proteins identified in this study have been related to obesity development. Conclusion The present results indicate that the 2-DE technique will be useful for nutritional studies focusing on hypothalamic proteins. The data presented herein will serve as a reference database for studies testing the effects of dietary manipulations on hypothalamic proteome. We trust that these experiments will lead to important knowledge on protein targets of nutritional variables potentially able to affect the complex central nervous system control of energy homeostasis.
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Affiliation(s)
- Amanda P Pedroso
- Department of Physiology, Division of Nutrition Physiology, Universidade Federal de São Paulo, UNIFESP, São Paulo, SP, Brazil.
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de Matos Feijó F, Bertoluci MC, Reis C. Serotonin and hypothalamic control of hunger: a review. Rev Assoc Med Bras (1992) 2011. [DOI: 10.1016/s0104-4230(11)70020-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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14
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Matos Feijó FD, Casaccia Bertoluci M, Reis C. Serotonina e controle hipotalâmico da fome: uma revisão. Rev Assoc Med Bras (1992) 2011. [DOI: 10.1590/s0104-42302011000100020] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Watanabe RLH, Andrade IS, Telles MM, Albuquerque KT, Nascimento CMO, Oyama LM, Casarini DE, Ribeiro EB. Long-term consumption of fish oil-enriched diet impairs serotonin hypophagia in rats. Cell Mol Neurobiol 2010; 30:1025-33. [PMID: 20526668 DOI: 10.1007/s10571-010-9533-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2010] [Accepted: 05/14/2010] [Indexed: 11/28/2022]
Abstract
Hypothalamic serotonin inhibits food intake and stimulates energy expenditure. High-fat feeding is obesogenic, but the role of polyunsaturated fats is not well understood. This study examined the influence of different high-PUFA diets on serotonin-induced hypophagia, hypothalamic serotonin turnover, and hypothalamic protein levels of serotonin transporter (ST), and SR-1B and SR-2C receptors. Male Wistar rats received for 9 weeks from weaning a diet high in either soy oil or fish oil or low fat (control diet). Throughout 9 weeks, daily intake of fat diets decreased such that energy intake was similar to that of the control diet. However, the fish group developed heavier retroperitoneal and epididymal fat depots. After 12 h of either 200 or 300 μg intracerebroventricular serotonin, food intake was significantly inhibited in control group (21-25%) and soy group (37-39%) but not in the fish group. Serotonin turnover was significantly lower in the fish group than in both the control group (-13%) and the soy group (-18%). SR-2C levels of fish group were lower than those of control group (50%, P = 0.02) and soy group (37%, P = 0.09). ST levels tended to decrease in the fish group in comparison to the control group (16%, P = 0.339) and the soy group (21%, P = 0.161). Thus, unlike the soy-oil diet, the fish-oil diet decreased hypothalamic serotonin turnover and SR-2C levels and abolished serotonin-induced hypophagia. Fish-diet rats were potentially hypophagic, suggesting that, at least up to this point in its course, the serotonergic impairment was either compensated by other factors or not of a sufficient extent to affect feeding. That fat pad weight increased in the absence of hyperphagia indicates that energy expenditure was affected by the serotonergic hypofunction.
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Affiliation(s)
- Regina L H Watanabe
- Departamento de Fisiologia, Universidade Federal de São Paulo, Rua Botucatu, São Paulo, SP, Brazil
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