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Abstract
PURPOSE OF REVIEW Total glutamate (Glu) intake is 5-20 g/day in adults and about 40 mg/kg in breast-fed infant. Glu intake is constituted by Glu from protein and free Glu from certain foods and flavor-enhancing additive. The admissible intake of free Glu additive is addressed. RECENT FINDING In the gut, Glu is actively metabolized by enterocytes and because of this metabolism, the systemic availability of ingested Glu remains relatively low. Human studies are preferred to assess the transfer in blood of dietary free Glu salts and their possible risks. When human data are not available, experimental animal models provide the basis to assess the risks to humans but toxicity studies in rodents remain for a part controversial. A No Observable Adverse Effect Level (NOAEL) in rodent of 3200 mg/kg/day and an uncertainty factor of 100 lead to an acceptable daily intake (ADI) of 30 mg/kg/day for free Glu salts used as additives, whereas a NOAEL higher than 6000 mg/kg/day and an uncertainty factor of 25 leads to an ADI of 240 mg/kg/day for free Glu salts. SUMMARY Current discussions indicate an ADI from 30 to 240 mg/kg/day depending on the chosen NOAEL in animal model and compound-specific uncertainty factor (from 25 to 100).
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Affiliation(s)
- Daniel Tomé
- UMR PNCA, INRA, AgroParisTech, Université Paris-Saclay, Paris, France
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3
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Barban JB, Simões BP, Moraes BDGDC, da Anunciação CR, da Rocha CS, Pintor DCQ, Guerra DC, Silva DA, Brandão EDCM, Kerbauy F, Pires FRDO, Morais GL, Schmidt J, Sicchieri JMF, Barroso KSN, Viana LV, da Rocha MHM, Guimarães MP, Lazzari NLC, Hamerschlak N, Ramos PP, Gomes PN, Mendonça PDS, de Oliveira RC, Scomparim RC, Chiattone R, Diez-Garcia RW, Cardenas TDC, Miola TM, Costa TCDM, Rocha V, Pereira AZ. Brazilian Nutritional Consensus in Hematopoietic Stem Cell Transplantation: Adults. EINSTEIN-SAO PAULO 2020; 18:AE4530. [PMID: 32049129 PMCID: PMC6999189 DOI: 10.31744/einstein_journal/2020ae4530] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Accepted: 05/16/2019] [Indexed: 02/06/2023] Open
Abstract
The nutritional status of patients submitted to hematopoietic stem cell transplant is considered an independent risk factor, which may influence on quality of life and tolerance to the proposed treatment. The impairment of nutritional status during hematopoietic stem cell transplant occurs mainly due to the adverse effects resulting from conditioning to which the patient is subjected. Therefore, adequate nutritional evaluation and follow-up during hematopoietic stem cell transplant are essential. To emphasize the importance of nutritional status and body composition during treatment, as well as the main characteristics related to the nutritional assessment of the patient, the Brazilian Consensus on Nutrition in Hematopoietic Stem Cell Transplant: Adults was prepared, aiming to standardize and update Nutritional Therapy in this area. Dietitians, nutrition physicians and hematologists from 15 Brazilian centers thar are references in hematopoietic stem cell transplant took part.
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Affiliation(s)
- Juliana Bernardo Barban
- Escola Paulista de MedicinaUniversidade Federal de São PauloSão PauloSPBrazil Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil.
| | - Belinda Pinto Simões
- Hospital das ClínicasFaculdade de Medicina de Ribeirão PretoUniversidade de São PauloRibeirão PretoSPBrazil Hospital das Clínicas, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
| | - Bruna Del Guerra de Carvalho Moraes
- Hospital das ClínicasFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrazil Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil.
| | | | | | - Daniela Cristina Querino Pintor
- Hospital das ClínicasFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrazil Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil.
| | - Daiane Cristina Guerra
- Centro de Transplante de Medula ÓsseaInstituto Nacional de Câncer José Alencar Gomes da SilvaRio de JaneiroRJBrazil Centro de Transplante de Medula Óssea, Instituto Nacional de Câncer José Alencar Gomes da Silva - INCA, Rio de Janeiro, RJ, Brazil.
| | | | - Edith de Castro Martins Brandão
- Hospital das ClínicasFaculdade de Medicina de Ribeirão PretoUniversidade de São PauloRibeirão PretoSPBrazil Hospital das Clínicas, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
| | - Fábio Kerbauy
- Universidade Federal de São PauloSão PauloSPBrazil Universidade Federal de São Paulo, São Paulo, SP, Brazil.
| | | | | | - Jayr Schmidt
- Hospital das ClínicasFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrazil Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil.
| | - Juliana Maria Faccioli Sicchieri
- Hospital das ClínicasFaculdade de Medicina de Ribeirão PretoUniversidade de São PauloRibeirão PretoSPBrazil Hospital das Clínicas, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
| | - Karine Sampaio Nunes Barroso
- Universidade Federal do CearáHospital Universitário Walter CantídioFortalezaCEBrazilHospital Universitário Walter Cantídio, Universidade Federal do Ceará, Fortaleza, CE, Brazil.
| | - Luciana Verçoza Viana
- Hospital de Clínicas de Porto AlegrePorto AlegreRSBrazilHospital de Clínicas de Porto Alegre, Porto Alegre, RS, Brazil.
| | - Mariana Hollanda Martins da Rocha
- Hospital das ClínicasFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrazil Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil.
| | | | | | - Nelson Hamerschlak
- Hospital Israelita Albert EinsteinSão PauloSPBrazilHospital Israelita Albert Einstein, São Paulo, SP, Brazil.
| | - Plinio Patricia Ramos
- Hospital Leforte LiberdadeSão PauloSPBrazil Hospital Leforte Liberdade, São Paulo, SP, Brazil.
| | - Plinio Nascimento Gomes
- Centro de Transplante de Medula ÓsseaInstituto Nacional de Câncer José Alencar Gomes da SilvaRio de JaneiroRJBrazil Centro de Transplante de Medula Óssea, Instituto Nacional de Câncer José Alencar Gomes da Silva - INCA, Rio de Janeiro, RJ, Brazil.
| | - Priscila da Silva Mendonça
- Universidade Federal do CearáHospital Universitário Walter CantídioFortalezaCEBrazilHospital Universitário Walter Cantídio, Universidade Federal do Ceará, Fortaleza, CE, Brazil.
| | | | - Renata Corrêa Scomparim
- Universidade Estadual de CampinasCampinasSPBrazilUniversidade Estadual de Campinas, Campinas, SP, Brazil.
| | - Ricardo Chiattone
- Hospital SamaritanoSão PauloSPBrazilHospital Samaritano, São Paulo, SP, Brazil.
| | - Rosa Wanda Diez-Garcia
- Hospital das ClínicasFaculdade de Medicina de Ribeirão PretoUniversidade de São PauloRibeirão PretoSPBrazil Hospital das Clínicas, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
| | | | - Thais Manfrinato Miola
- A.C.Camargo Cancer CenterSão PauloSPBrazil A.C.Camargo Cancer Center, São Paulo, SP, Brazil.
| | - Thalita Cristina de Mello Costa
- Hospital das ClínicasFaculdade de Medicina de Ribeirão PretoUniversidade de São PauloRibeirão PretoSPBrazil Hospital das Clínicas, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
| | - Vanderson Rocha
- Hospital das ClínicasFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrazil Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil.
| | - Andrea Z Pereira
- Hospital Israelita Albert EinsteinSão PauloSPBrazilHospital Israelita Albert Einstein, São Paulo, SP, Brazil.
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4
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Holton KF, Kirkland AE. Moving past antioxidant supplementation for the dietary treatment of multiple sclerosis. Mult Scler 2019; 26:1012-1023. [PMID: 31823691 DOI: 10.1177/1352458519893925] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Current research has demonstrated the definitive presence of oxidative stress in multiple sclerosis (MS). This finding has led to clinical trial research which has indicated that specific antioxidants have the ability to effectively reduce markers of oxidative stress. However, few interventions testing antioxidant supplements have shown efficacy for reducing the symptom burden in the disorder. This paper quickly reviews what is currently known about oxidative stress and antioxidants in MS, explains which nutrients are critical for the creation and maintenance of the myelin sheath, describes potential negative effectors in the diet which may be contributing to oxidative stress, and how these aspects of diet, combined with current knowledge on antioxidants, may be able to be combined into a whole food dietary intervention which can be tested for efficacy in MS.
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Affiliation(s)
- Kathleen F Holton
- Department of Health Studies and Center for Behavioral Neuroscience, American University, Washington, DC, USA
| | - Anna E Kirkland
- Department of Psychology, American University, Washington, DC, USA
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Spanier B, Wallwitz J, Zapoglou D, Idrissou BMG, Fischer C, Troll M, Petzold K, Daniel H. The Reproduction Rate of Peptide Transporter PEPT-1 Deficient C. elegans Is Dependent on Dietary Glutamate Supply. Front Mol Biosci 2018; 5:109. [PMID: 30560135 PMCID: PMC6284198 DOI: 10.3389/fmolb.2018.00109] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 11/15/2018] [Indexed: 01/19/2023] Open
Abstract
Intestinal absorption of dietary amino acids is mediated via two routes. Free amino acids released by hydrolysis of dietary proteins are taken up by a multitude of amino acid transporters while di- and tripeptides released are taken up by the peptide transporter PEPT-1. Loss of PEPT-1 impairs growth, post-embryonic development and reproduction in Caenorhabditis elegans, and supplementation with a mixture of all L-amino acids only partially rescues fertility. In the present study, we demonstrate that dietary L-glutamate is the responsible amino acid that can increase fertility in hermaphrodite pept-1 worms. This effect was associated with a significantly higher uptake of glutamate/aspartate in pept-1 than in wildtype C. elegans. Furthermore, we found that the intestinal transporter proteins SNF-5 of the solute carrier SLC6 family of nutrient amino acid transporters (NAT) and AAT-6 of the SLC7 family as the light subunit of a heteromeric amino acid transporter (HAT) play a key role in glutamate homeostasis in pept-1 C. elegans. Genes encoding these transporters are highly expressed and upon silencing a 95% reduced fertility (snf-5) and sterility (aat-6) was observed. A subsequent L-glutamate supplementation failed to rescue these phenotypes. Dietary glutamate supplementation did neither influence the feeding frequency, nor did it improve mating efficiency of pept-1 males. Most strikingly, pept-1 were more prone to habituation to repeated gentle touch stimuli than wildtype C. elegans, and dietary glutamate supply was sufficient to alter this behavioral output by restoring the mechanosensory response to wildtype levels. Taken together, our data demonstrate a key role of L-glutamate in amino acid homeostasis in C. elegans lacking the peptide transporter in the intestine and demonstrate its distinct role in reproduction and for neural circuits mediating touch sensitivity.
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Affiliation(s)
- Britta Spanier
- Nutritional Physiology, Technische Universität München, Munich, Germany
| | | | - Despoina Zapoglou
- Nutritional Physiology, Technische Universität München, Munich, Germany
| | | | - Christine Fischer
- Nutritional Physiology, Technische Universität München, Munich, Germany
| | - Martina Troll
- Nutritional Physiology, Technische Universität München, Munich, Germany
| | - Katrin Petzold
- Nutritional Physiology, Technische Universität München, Munich, Germany
| | - Hannelore Daniel
- Nutritional Physiology, Technische Universität München, Munich, Germany
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Dietary composition modulates impact of food-added monosodium glutamate on behaviour, metabolic status and cerebral cortical morphology in mice. Biomed Pharmacother 2018; 109:417-428. [PMID: 30399577 DOI: 10.1016/j.biopha.2018.10.172] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 10/20/2018] [Accepted: 10/30/2018] [Indexed: 02/07/2023] Open
Abstract
Effects of food-added monosodium glutamate (MSG) on neurobehaviour, serum biochemical parameters, malondialdehyde (MDA) levels, and changes in cerebral cortex, liver and kidney morphology were assessed in mice fed standard diet (SD) or high-fat diet (HFD). Animals were assigned to 8 groups [SD control, HFD control, and six groups fed MSG plus SD or HFD at 0.1, 0.2 and 0.4 g/kg of feed]. Animals were fed for 8 weeks, behavioural tests were conducted, and blood was taken for estimation of biochemical parameters and MDA level. Whole brain was homogenised for neurochemical assays, while the cerebrum, liver and kidneys were processed for histology. In groups fed MSG/SD, there was a decrease in weight gain, increase in food-intake, an increase in locomotion, a decrease in rearing/grooming, and a decrease in anxiety-response. Also observed were derangements in biochemical parameters, increased MDA, and alteration of renal morphology. Compared to HFD, MSG/HFD groups had reduction in weight gain, food-intake, grooming and anxiety-response, an increase in locomotion, and improved memory. Protection against biochemical derangements and HFD-induced organ injuries were also observed. In conclusion, the findings suggest that possible interactions that may occur between dietary constituents and MSG are determinants of the effects of food-added MSG in mice.
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Neurocognitive effects of umami: association with eating behavior and food choice. Neuropsychopharmacology 2018; 43:2009-2016. [PMID: 29599485 PMCID: PMC6098010 DOI: 10.1038/s41386-018-0044-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 02/25/2018] [Accepted: 03/01/2018] [Indexed: 12/14/2022]
Abstract
Free glutamate, a key substance underlying the umami taste of foods, fulfills a number of physiological functions related to energy balance. Previous experimental studies have shown that intake of a broth or soup supplemented with monosodium glutamate (MSG) prior to a meal can decrease appetite and food intake, particularly in women with propensity to overeat and gain weight. In this study, we examined potential neurocognitive mechanisms underlying this effect. We evaluated changes after intake of a chicken broth with or without MSG added (MSG+/MSG-) in a sample of healthy young women. Subjects were assessed with a food-modified computerized inhibitory control task, a buffet meal test with eye-tracking, and brain responses during a food choice paradigm evaluated with functional neuroimaging. We found evidence for improvement in key parameters related to inhibitory control following intake of the MSG+ broth, particularly in subjects with high levels of eating disinhibition, who also showed lower intake of saturated fat during the meal. Additionally, consumption of the MSG+ broth led to a reduction of the rate of fixation switches between plates at the meal, and increased engagement of a brain region in the left dorsolateral prefrontal cortex previously associated with successful self-control during dietary decisions. Altogether, these results, while preliminary, suggest potential facilitating effects of glutamate (MSG) on cognitive executive processes that are relevant for the support of healthy eating behaviors and food choice.
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