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Alharbi TA, Rabbani SI, Orfali R, Almadani ME, Ahmad F, Gilkaramenthi R, Jibreel EA, Ahmed Quadri MS, Basheeruddin Asdaq SM. Metabolic effects of a submaximal dose of pink salt and monosodium glutamate in experimental rats. Heliyon 2024; 10:e29810. [PMID: 38681587 PMCID: PMC11053270 DOI: 10.1016/j.heliyon.2024.e29810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 04/02/2024] [Accepted: 04/15/2024] [Indexed: 05/01/2024] Open
Abstract
Background & objectives Pink salt and monosodium glutamate (MSG) are two typical food additives used in cooking to enhance flavour. However, excessive use of them has been associated to a variety of metabolic problems, including weight gain and hyperglycemia. The current study aimed to assess the metabolic changes caused by submaximal dosages of MSG and pink salt in experimental rats. Methods Twenty-four 120-150 g Wister rats of both sexes were divided into three groups: control, pink salt-treated (0.8 g/kg daily for three weeks), and MSG-treated (3.6 g/kg daily for three weeks). The body weight, amount of food and water consumed, and blood glucose levels of animals were measured and recorded as indicators of their metabolic changes. Furthermore, after salt treatments at intervals such as week 1, week 2, and week 3, the survival rate and general toxicity manifestations were determined. The results were statistically analysed using one-way ANOVA, with p < 0.05 being considered significant. Results The study found that the group given a submaximal dose of MSG gained significantly more weight (p < 0.05), consumed more food and water, and had higher blood glucose levels than the control. Ninety percent of the MSG therapy group survived by the end of the third week, however, they suffered from negative effects like abdominal distention, respiratory problems, ptosis, and subcutaneous swelling. On the other hand, the consumption of food and drink was significantly (p < 0.05) increased upon the administration of pink salt. Only little changes were observed in the body weight, blood sugar levels, and general features (such as subcutaneous swelling, change in bowel colour, and loose stools). Additionally, it was shown that the survival rate remained unchanged, particularly after week 3. Conclusion According to study findings, MSG may induce metabolic issues, increasing the chance of death. While there was no discernible metabolic aberration linked to pink salt. Further research is required to fully understand the mechanism and consequences of these taste enhancers on the host system before pink salt can be deemed safe.
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Affiliation(s)
| | - Syed Imam Rabbani
- Department of Pharmacology and Toxicology, College of Pharmacy, Qassim University, Buraydah, 51452, Kingdom of Saudi Arabia
| | - Raha Orfali
- Department of Pharmacognosy, College of Pharmacy, King Saud University, PO Box 2457, Riyadh, 11451, Saudi Arabia
| | - Moneer E. Almadani
- Department of Clinical Medicine, College of medicine, AlMaarefa University, Dariyah, Riyadh, 13713, Saudi Arabia
| | - Fuzail Ahmad
- Respiratory Care Department, College of Applied Sciences, AlMaarefa University, Dariyah, 13713, Riyadh, Saudi Arabia
| | - Rafiulla Gilkaramenthi
- Department of Emergency Medical Services, College of Applied Sciences, AlMaarefa University, Diriyah, 13713, Riyadh, Saudi Arabia
| | - Ebtesam Abdulrahman Jibreel
- Department of Nursing, College of Applied Sciences, AlMaarefa University, Dariyah, 13713, Riyadh, Saudi Arabia
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Ottomana AM, Presta M, O'Leary A, Sullivan M, Pisa E, Laviola G, Glennon JC, Zoratto F, Slattery DA, Macrì S. A systematic review of preclinical studies exploring the role of insulin signalling in executive function and memory. Neurosci Biobehav Rev 2023; 155:105435. [PMID: 37913873 DOI: 10.1016/j.neubiorev.2023.105435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 10/04/2023] [Accepted: 10/23/2023] [Indexed: 11/03/2023]
Abstract
Beside its involvement in somatic dysfunctions, altered insulin signalling constitutes a risk factor for the development of mental disorders like Alzheimer's disease and obsessive-compulsive disorder. While insulin-related somatic and mental disorders are often comorbid, the fundamental mechanisms underlying this association are still elusive. Studies conducted in rodent models appear well suited to help decipher these mechanisms. Specifically, these models are apt to prospective studies in which causative mechanisms can be manipulated via multiple tools (e.g., genetically engineered models and environmental interventions), and experimentally dissociated to control for potential confounding factors. Here, we provide a narrative synthesis of preclinical studies investigating the association between hyperglycaemia - as a proxy of insulin-related metabolic dysfunctions - and impairments in working and spatial memory, and attention. Ultimately, this review will advance our knowledge on the role of glucose metabolism in the comorbidity between somatic and mental illnesses.
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Affiliation(s)
- Angela Maria Ottomana
- Centre for Behavioural Sciences and Mental Health, Istituto Superiore di Sanità, 00161 Rome, Italy; Neuroscience Unit, Department of Medicine, University of Parma, 43100 Parma, Italy
| | - Martina Presta
- Centre for Behavioural Sciences and Mental Health, Istituto Superiore di Sanità, 00161 Rome, Italy; Department of Physiology and Pharmacology, Sapienza University of Rome, 00185 Rome, Italy
| | - Aet O'Leary
- Department of Psychiatry, Psychosomatic Medicine and Psychotherapy, University Hospital Frankfurt, Frankfurt, Germany; Chair of Neuropsychopharmacology, Institute of Chemistry, University of Tartu, Tartu, Estonia
| | - Mairéad Sullivan
- Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Ireland
| | - Edoardo Pisa
- Centre for Behavioural Sciences and Mental Health, Istituto Superiore di Sanità, 00161 Rome, Italy
| | - Giovanni Laviola
- Centre for Behavioural Sciences and Mental Health, Istituto Superiore di Sanità, 00161 Rome, Italy
| | - Jeffrey C Glennon
- Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Ireland
| | - Francesca Zoratto
- Centre for Behavioural Sciences and Mental Health, Istituto Superiore di Sanità, 00161 Rome, Italy
| | - David A Slattery
- Department of Psychiatry, Psychosomatic Medicine and Psychotherapy, University Hospital Frankfurt, Frankfurt, Germany
| | - Simone Macrì
- Centre for Behavioural Sciences and Mental Health, Istituto Superiore di Sanità, 00161 Rome, Italy.
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Putra SED, Humardani FM, Mulyanata LT, Tanaya LTA, Wijono H, Sulistomo HW, Kesuma D, Ikawaty R. Exploring diet-induced promoter hypomethylation and PDK4 overexpression: implications for type 2 diabetes mellitus. Mol Biol Rep 2023; 50:8949-8958. [PMID: 37707772 DOI: 10.1007/s11033-023-08794-7] [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: 07/06/2023] [Accepted: 08/30/2023] [Indexed: 09/15/2023]
Abstract
BACKGROUND Type 2 diabetes mellitus (T2DM) is a metabolic disorder characterized by limited metabolic flexibility in the body. Such limitation implicates the pyruvate dehydrogenase kinase 4 (PDK4) gene Poor nutrition, frequently observed among Southeast Asians usually involves excessive intakes of carbohydrates and monosodium glutamate (MSG), that have been frequently linked to an increased risk of T2DM. METHODS The 14-week study aimed to assess the effects of high-carbohydrate (HC), high-MSG (HMSG), and a combination of high-carbohydrate and high-MSG (HCHMSG) diets on the development of T2DM using male mice. To assess the effects, the male mice were divided into four groups: control (C), HC, HMSG, and HCHMSG for 14 weeks. RESULTS After 14 weeks, both the HC and HCHMSG groups showed signs of T2DM (168.83 ± 32.33; 156.42 ± 32.46). The blood samples from the HMSG, HC, and HCHMSG groups (57.67 ± 2.882; 49.22 ± 7.36; 48.9 ± 6.43) as well as skeletal muscle samples from the HMSG, HC, and HCHMSG groups (57.78 ± 8.54; 42.13 ± 7.25; 37.57 ± 10.42) exhibited a gradual hypomethylation. The HC groups particularly displayed significant PDK4 gene expression in skeletal muscle. A progressive overexpression of the PDK4 gene was observed as well in the HMSG, HCHMSG, and HC groups (2.03 ± 3.097; 3.21 ± 2.94; 5.86 ± 2.54). CONCLUSIONS These findings suggest that T2DM can be induced by high-carbohydrate and high-MSG diets. However, the sole consumption of high MSG did not lead to the development of T2DM. Further research should focus on conducting long-term studies to fully comprehend the impact of a high MSG diet on individuals with pre-existing T2DM.
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Affiliation(s)
| | - Farizky Martriano Humardani
- Faculty of Medicine, University of Surabaya, Surabaya, 60292, Indonesia
- Magister in Biomedical Science Program, Faculty of Medicine, Faculty of Medicine Universitas Brawijaya, Malang, 65112, Indonesia
| | | | | | - Heru Wijono
- Faculty of Medicine, University of Surabaya, Surabaya, 60292, Indonesia
| | - Hikmawan Wahyu Sulistomo
- Magister in Biomedical Science Program, Faculty of Medicine, Faculty of Medicine Universitas Brawijaya, Malang, 65112, Indonesia
| | - Dini Kesuma
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Surabaya, Surabaya, 60292, Indonesia
| | - Risma Ikawaty
- Faculty of Medicine, University of Surabaya, Surabaya, 60292, Indonesia.
- , Raya Kali Rungkut Street, Surabaya, 60292, East Java, Indonesia.
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Acikel-Elmas M, Algilani SA, Sahin B, Bingol Ozakpinar O, Gecim M, Koroglu K, Arbak S. Apocynin Ameliorates Monosodium Glutamate Induced Testis Damage by Impaired Blood-Testis Barrier and Oxidative Stress Parameters. Life (Basel) 2023; 13:life13030822. [PMID: 36983977 PMCID: PMC10052003 DOI: 10.3390/life13030822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 03/08/2023] [Accepted: 03/09/2023] [Indexed: 03/30/2023] Open
Abstract
BACKGROUND the aim of this study was to investigate the effects of apocynin (APO) on hormone levels, the blood-testis barrier, and oxidative biomarkers in monosodium glutamate (MSG) induced testicular degeneration. METHODS Sprague Dawley male rats (150-200 g; n = 32) were randomly distributed into four groups: control, APO, MSG, and MSG + APO. MSG and MSG + APO groups were administered MSG (120 mg/kg) for 28 days. Moreover, the APO and MSG + APO groups received APO (25 mg/kg) during the last five days of the experiment. All administrations were via oral gavage. Finally, biochemical analyses were performed based on the determination of testosterone, follicle-stimulating hormone (FSH), luteinizing hormone (LH), malondialdehyde (MDA), glutathione (GSH), and superoxide dismutase (SOD), as well as light and transmission electron microscopic examinations, assessment of sperm parameters, ZO-1, occludin, NOX-2, and TUNEL immunohistochemistry were evaluated. RESULTS MSG increased both the oxidative stress level and apoptosis, decreased cell proliferation, and caused degeneration in testis morphology including in the blood-testis barrier. Administration of apocynin reversed all the deteriorated morphological and biochemical parameters in the MSG + APO group. CONCLUSIONS apocynin is considered to prevent testicular degeneration by maintaining the integrity of the blood-testis barrier with balanced hormone and oxidant/antioxidant levels.
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Affiliation(s)
- Merve Acikel-Elmas
- Department of Histology and Embryology, School of Medicine, Acibadem Mehmet Ali Aydinlar University, Icerenkoy Mah., Kayisdagi Cad. No. 32, Atasehir, Istanbul 34752, Turkey
| | - Salva Asma Algilani
- Department of Histology and Embryology, School of Medicine, Acibadem Mehmet Ali Aydinlar University, Icerenkoy Mah., Kayisdagi Cad. No. 32, Atasehir, Istanbul 34752, Turkey
| | - Begum Sahin
- Department of Histology and Embryology, School of Medicine, Acibadem Mehmet Ali Aydinlar University, Icerenkoy Mah., Kayisdagi Cad. No. 32, Atasehir, Istanbul 34752, Turkey
| | - Ozlem Bingol Ozakpinar
- Department of Biochemistry, Faculty of Pharmacy, Marmara University, Basibuyuk Yolu, 4/A, Basibuyuk, Istanbul 34854, Turkey
| | - Mert Gecim
- Department of Biochemistry, Faculty of Pharmacy, Marmara University, Basibuyuk Yolu, 4/A, Basibuyuk, Istanbul 34854, Turkey
| | - Kutay Koroglu
- Department of Histology and Embryology, School of Medicine, Marmara University, Basibuyuk Yolu No. 9 D:2, Maltepe, Istanbul 34854, Turkey
| | - Serap Arbak
- Department of Histology and Embryology, School of Medicine, Acibadem Mehmet Ali Aydinlar University, Icerenkoy Mah., Kayisdagi Cad. No. 32, Atasehir, Istanbul 34752, Turkey
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An Early and Sustained Inflammatory State Induces Muscle Changes and Establishes Obesogenic Characteristics in Wistar Rats Exposed to the MSG-Induced Obesity Model. Int J Mol Sci 2023; 24:ijms24054730. [PMID: 36902158 PMCID: PMC10003260 DOI: 10.3390/ijms24054730] [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: 10/21/2022] [Revised: 12/23/2022] [Accepted: 12/26/2022] [Indexed: 03/05/2023] Open
Abstract
The model of obesity induced by monosodium glutamate cytotoxicity on the hypothalamic nuclei is widely used in the literature. However, MSG promotes persistent muscle changes and there is a significant lack of studies that seek to elucidate the mechanisms by which damage refractory to reversal is established. This study aimed to investigate the early and chronic effects of MSG induction of obesity upon systemic and muscular parameters of Wistar rats. The animals were exposed to MSG subcutaneously (4 mg·g-1 b.w.) or saline (1.25 mg·g-1 b.w.) daily from PND01 to PND05 (n = 24). Afterwards, in PND15, 12 animals were euthanized to determine the plasma and inflammatory profile and to assess muscle damage. In PND142, the remaining animals were euthanized, and samples for histological and biochemical analyses were obtained. Our results suggest that early exposure to MSG reduced growth, increased adiposity, and inducted hyperinsulinemia and a pro-inflammatory scenario. In adulthood, the following were observed: peripheral insulin resistance, increased fibrosis, oxidative distress, and a reduction in muscle mass, oxidative capacity, and neuromuscular junctions, increased fibrosis, and oxidative distress. Thus, we can conclude that the condition found in adult life and the difficulty restoring in the muscle profile is related to the metabolic damage established early on.
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Liu Y, Huang H, Sun Y, Li Y, Luo B, Cui J, Zhu M, Bi F, Chen K, Liu Y. Monosodium Glutamate-Induced Mouse Model With Unique Diabetic Retinal Neuropathy Features and Artificial Intelligence Techniques for Quantitative Evaluation. Front Immunol 2022; 13:862702. [PMID: 35572527 PMCID: PMC9092070 DOI: 10.3389/fimmu.2022.862702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 03/17/2022] [Indexed: 11/26/2022] Open
Abstract
Objective To establish an artificial intelligence-based method to quantitatively evaluate subtle pathological changes in retinal nerve cells and synapses in monosodium glutamate (MSG) mice and provide an effective animal model and technique for quantitative evaluation of retinal neurocytopathies. Methods ICR mice were subcutaneously injected with MSG to establish a model of metabolic syndrome. We then established a mouse model of type 1 diabetes, type 2 diabetes, and KKAy mouse model as control. The HE sections of the retina were visualized using an optical microscope. AI technology was used for quantitative evaluation of the retinal lesions in each group of rats. The surface area custom parameters of the retinal nerve fiber layer (RNFL), inner plexiform layer (IPL), inner nuclear layer (INL), and outer plexiform layer (OPL) were defined as SR, SIPL, SINL, and SOPL, respectively. Their heights were defined as HR, HIPL, HINL, and HOPL, and the number of ganglion cells was defined as A. Then, the attention-augmented fully convolutional Unet network was used to segment the retinal HE images, and AI technology to identify retinal neurocytopathies quantitatively. Results The attention-augmented fully convolutional Unet network increased PA and IOU parameters for INL, OPL, RNFL, and ganglion cells and was superior in recognizing fine structures. A quantitative AI identification of the height of each layer of the retina showed that the heights of the IPL and INL of the MSG model were significantly less than those of the control groups; the retinas of the other diabetic models did not exhibit this pathological feature. The RNFLs of type 2 diabetes were thinner, and the characteristics of retinopathy were not obvious in the other animal models. The pathological changes seen on HE images were consistent with the results of the quantitative AI evaluation. Immunohistochemistry results showed that NMDAR2A, GluR2, and NRG1 were significantly downregulated in the retina of MSG mice. Conclusions The MSG retinopathy model is closely associated with neurotransmitter abnormalities and exhibits important characteristics of retinal neurodegeneration, making it suitable for studying retinal neurocytopathies. The AI recognition technology for retinal images established in the present study can be used for the quantitative and objective evaluation of drug efficacy.
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Affiliation(s)
- Yanfei Liu
- National Clinical Research Centre for Chinese Medicine Cardiology, Xiyuan Hospital of China Academy of Chinese Medical Sciences, Beijing, China
| | - Hui Huang
- Beijing Duan-Dian Pharmaceutical Research & Development Co., Ltd., Beijing, China
| | - Yu Sun
- North China University of Technology, Beijing, China
| | - Yiwen Li
- National Clinical Research Centre for Chinese Medicine Cardiology, Xiyuan Hospital of China Academy of Chinese Medical Sciences, Beijing, China
| | - Binyu Luo
- National Clinical Research Centre for Chinese Medicine Cardiology, Xiyuan Hospital of China Academy of Chinese Medical Sciences, Beijing, China
| | - Jing Cui
- National Clinical Research Centre for Chinese Medicine Cardiology, Xiyuan Hospital of China Academy of Chinese Medical Sciences, Beijing, China
| | - Mengmeng Zhu
- National Clinical Research Centre for Chinese Medicine Cardiology, Xiyuan Hospital of China Academy of Chinese Medical Sciences, Beijing, China
| | - Fukun Bi
- North China University of Technology, Beijing, China
| | - Keji Chen
- National Clinical Research Centre for Chinese Medicine Cardiology, Xiyuan Hospital of China Academy of Chinese Medical Sciences, Beijing, China
| | - Yue Liu
- National Clinical Research Centre for Chinese Medicine Cardiology, Xiyuan Hospital of China Academy of Chinese Medical Sciences, Beijing, China
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Wang ZJ, Bai Z, Yan JH, Liu TT, Li YM, Xu JH, Meng XQ, Bi YF. Anti-diabetic effects of linarin from Chrysanthemi Indici Flos via AMPK activation. CHINESE HERBAL MEDICINES 2021; 14:97-103. [PMID: 36120128 PMCID: PMC9476778 DOI: 10.1016/j.chmed.2021.11.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 04/08/2021] [Accepted: 08/05/2021] [Indexed: 11/08/2022] Open
Abstract
Objective The purpose of this study is to investigate the anti-diabetic effects of linarin, a flavonoid extracted from Chrysanthemi Indici Flos (CIF), and its potential mechanisms. Methods The effects of linarin on cell viability and glucose consumption in HepG2 cells were measured. Meanwhile, monosodium glutamate (MSG) mouse model was constructed to monitor the changes of insulin tolerance, glucose tolerance, triglyceride and cholesterol. The protein expression levels of p-AMPK, p-ACC, PEPCK and p-GS were detected by Western blot. Results Linarin could increase the relative glucose consumption of HepG2 cells, improve insulin tolerance and glucose tolerance, and decrease the levels of triglyceride and cholesterol of MSG mice. Simultaneously, the expression levels of p-AMPK and p-ACC in HepG2 cells and the liver tissue of MSG mice were increased, while the expression levels of PEPCK and p-GS were decreased after treatment with linarin. Conclusion Insulin resistance could be ameliorated by linarin in type 2 diabetes, and its mechanism may be related to AMPK signaling pathway.
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Differential effects of sodium chloride and monosodium glutamate on kidney of adult and aging mice. Sci Rep 2021; 11:481. [PMID: 33436880 PMCID: PMC7804302 DOI: 10.1038/s41598-020-80048-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 12/11/2020] [Indexed: 02/06/2023] Open
Abstract
Monosodium Glutamate (MSG) is used as flavour enhancer, with potential beneficial effects due to its nutritional value. Given the decline in kidney functions during aging, we investigated the impact of MSG voluntary intake on the kidney of male mice, aged 6 or 18 months. For 2 months, they freely consumed water (control group), sodium chloride (0.3% NaCl) or MSG (1% MSG) in addition to standard diet. Young animals consuming sodium chloride presented signs of proteinuria, hyperfiltration, enhanced expression and excretion of Aquaporin 2 and initial degenerative reactions suggestive of fibrosis, while MSG-consuming mice were similar to controls. In old mice, aging-related effects including proteinuria and increased renal corpuscle volume were observed in all groups. At an advanced age, MSG caused no adverse effects on the kidney compared to controls, despite the presence of a sodium moiety, similar to sodium chloride. These data show that prolonged MSG intake in mice has less impact on kidney compared to sodium chloride, that already in young animals induced some effects on kidney, possibly related to hypertension.
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Khan TA, Sievenpiper JL, Fernstrom JD. Commentary: Dietary Glutamic Acid, Obesity, and Depressive Symptoms in Patients With Schizophrenia. Front Psychiatry 2021; 12:725786. [PMID: 34721103 PMCID: PMC8551475 DOI: 10.3389/fpsyt.2021.725786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 08/27/2021] [Indexed: 11/29/2022] Open
Affiliation(s)
- Tauseef A Khan
- Department of Nutritional Sciences, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada.,Toronto 3D Knowledge Synthesis and Clinical Trials Unit, St. Michael's Hospital, Toronto, ON, Canada.,Clinical Nutrition and Risk Factor Modification Centre, St. Michael's Hospital, Toronto, ON, Canada
| | - John L Sievenpiper
- Department of Nutritional Sciences, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada.,Toronto 3D Knowledge Synthesis and Clinical Trials Unit, St. Michael's Hospital, Toronto, ON, Canada.,Clinical Nutrition and Risk Factor Modification Centre, St. Michael's Hospital, Toronto, ON, Canada.,Division of Endocrinology & Metabolism, Department of Medicine, St. Michael's Hospital, Toronto, ON, Canada.,Scientist, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada
| | - John D Fernstrom
- Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States.,Department of Pharmacology & Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
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Nie X, Chen J, Ma X, Ni Y, Shen Y, Yu H, Panagiotou G, Bao Y. A metagenome-wide association study of gut microbiome and visceral fat accumulation. Comput Struct Biotechnol J 2020; 18:2596-2609. [PMID: 33033580 PMCID: PMC7528071 DOI: 10.1016/j.csbj.2020.09.026] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 09/03/2020] [Accepted: 09/15/2020] [Indexed: 12/15/2022] Open
Abstract
Purpose Visceral fat is an independent risk factor for metabolic and cardiovascular disease. The study aimed to investigate the associations between gut microbiome and visceral fat. Methods We recruited 32 obese adults and 30 healthy controls at baseline. Among the obese subjects, 14 subjects underwent laparoscopic sleeve gastrectomy (LSG) and were followed 6 months after surgery. Abdominal visceral fat area (VFA) and subcutaneous fat area (SFA) were measured by magnetic resonance imaging. Waist, hipline, waist-to-hip ratio (WHR) and body mass index (BMI) were included as simple obese parameters. Gut microbiome was analyzed by metagenomic sequencing. Results Among the obese parameters, VFA had the largest number of correlations with the species that were differentially enriched between obese and healthy subjects, following by waist, WHR, BMI, hipline, and SFA. Within the species negatively correlated with VFA, Eubacterium eligens had the strongest correlation, following by Clostridium citroniae, C. symbiosum, Bacteroides uniformis, E. ventriosum, Ruminococcaceae bacterium D16, C. hathewayi, etc. C. hathewayi and C. citroniae were increased after LSG. Functional analyses showed that among all the obese parameters, VFA had strongest correlation coefficients with the obesity-related microbial pathways. Microbial pathways involved in carbohydrate fermentation and biosynthesis of L-glutamate and L-glutamine might contribute to visceral fat accumulation. Conclusions Visceral fat was more closely correlated with gut microbiome compared with subcutaneous fat, suggesting an intrinsic connection between gut microbiome and metabolic cardiovascular diseases. Specific microbial species and pathways which were closely associated with visceral fat accumulation might contribute to new targeted therapies for metabolic disorders.
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Key Words
- 2hCP, 2-hour C-peptide
- 2hPG, 2-hour plasma glucose
- ALT, alanine aminotransferase
- AST, aspartate aminotransferase
- BCAAs, branched chain amino acids
- BMI, body mass index
- CoDA, Compositional Data Analysis
- Cr, creatinine
- DBP, diastolic blood pressure
- FCp, fasting C-peptide
- FDR, false discovery rate
- FMT, fecal microbiota transplantation
- FPG, fasting plasma glucose
- GPR43, G-protein coupled receptor 43
- Gut microbiome
- HDL, high-density lipoprotein cholesterol
- HbA1c, glycated hemoglobin A1c
- LDL, low-density lipoprotein cholesterol
- LPS, lipopolysaccharides
- LSG, laparoscopic sleeve gastrectomy
- Laparoscopic sleeve gastrectomy
- MRI, magnetic resonance imaging
- MSG, monosodium glutamate
- Metagenomics
- Obesity
- SBP, systolic blood pressure
- SCFAs, short chain fatty acids
- SFA, subcutaneous fat area
- TC, total cholesterol
- TCA, tricarboxylic acid cycle
- TG, triglyceride
- UA, uric acid
- VFA, visceral fat area
- Visceral fat
- WBC, white blood cell count
- WHR, waist-to-hip ratio
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Affiliation(s)
- Xiaomin Nie
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai 200233, China
| | - Jiarui Chen
- Leibniz Institute for Natural Product Research and Infection Biology – Systems Biology and Bioinformatics, Hans Knöll Institute, Adolf-Reichwein-Straße 23, 07745 Jena, Germany
- School of Biological Sciences, The University of Hong Kong, Kadoorie Biological Sciences Building, Pok Fu Lam Road, Hong Kong Special Administrative Region
| | - Xiaojing Ma
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai 200233, China
| | - Yueqiong Ni
- Leibniz Institute for Natural Product Research and Infection Biology – Systems Biology and Bioinformatics, Hans Knöll Institute, Adolf-Reichwein-Straße 23, 07745 Jena, Germany
| | - Yun Shen
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai 200233, China
| | - Haoyong Yu
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai 200233, China
- Corresponding authors at: Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, 600 Yishan Road, Shanghai 200233, China (H. Yu and Y. Bao). Leibniz Institute for Natural Product Research and Infection Biology – Systems Biology and Bioinformatics, Hans Knöll Institute, Adolf-Reichwein-Straße 23, 07745 Jena, Germany (G. Panagiotou).
| | - Gianni Panagiotou
- Leibniz Institute for Natural Product Research and Infection Biology – Systems Biology and Bioinformatics, Hans Knöll Institute, Adolf-Reichwein-Straße 23, 07745 Jena, Germany
- School of Biological Sciences, The University of Hong Kong, Kadoorie Biological Sciences Building, Pok Fu Lam Road, Hong Kong Special Administrative Region
- Department of Medicine and State Key Laboratory of Pharmaceutical Biotechnology, The University of Hong Kong, Hong Kong Special Administrative Region
- Corresponding authors at: Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, 600 Yishan Road, Shanghai 200233, China (H. Yu and Y. Bao). Leibniz Institute for Natural Product Research and Infection Biology – Systems Biology and Bioinformatics, Hans Knöll Institute, Adolf-Reichwein-Straße 23, 07745 Jena, Germany (G. Panagiotou).
| | - Yuqian Bao
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai 200233, China
- Corresponding authors at: Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, 600 Yishan Road, Shanghai 200233, China (H. Yu and Y. Bao). Leibniz Institute for Natural Product Research and Infection Biology – Systems Biology and Bioinformatics, Hans Knöll Institute, Adolf-Reichwein-Straße 23, 07745 Jena, Germany (G. Panagiotou).
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Samuels A. Dose dependent toxicity of glutamic acid: a review. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2020. [DOI: 10.1080/10942912.2020.1733016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Adrienne Samuels
- Office of the administrator, Truth in Labeling Campaign, Chicago, IL, USA
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Kumar P, Kraal AZ, Prawdzik AM, Ringold AE, Ellingrod V. Dietary Glutamic Acid, Obesity, and Depressive Symptoms in Patients With Schizophrenia. Front Psychiatry 2020; 11:620097. [PMID: 33551881 PMCID: PMC7859478 DOI: 10.3389/fpsyt.2020.620097] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 12/23/2020] [Indexed: 12/12/2022] Open
Abstract
Introduction: Schizophrenia is a lifelong condition associated with several comorbid conditions such as physical illnesses like obesity, as well as co-occurring psychiatric symptoms such as depression. Research regarding susceptibility to some of these comorbidities has primary focused on genetic risks or neurotransmitters and very little work has been done to understand environmental factors such as diet. In particular, understanding the role of dietary glutamic acid consumption on co-morbidities in patients with schizophrenia is important, as evidence suggests that glutamic acid consumption may directly influence glutamatergic neurotransmission; a key neurotransmitter related to schizophrenia, its associated co-morbidities, and depression. Therefore, the aim of this study was to examine the potential relationship between dietary glutamic acid and depressive symptomatology in patients with schizophrenia, stratified by obesity status, due to its relationship with inflammation, antipsychotic use, and depressive symptoms. Methods: Subjects included in this analysis, were part of a parent cross-sectional study in which included three dietary recalls analyzed using protocols outlined as part of the National Health and Nutrition Examination Surveys (NHANES) standardized criteria. Additionally, body mass index (BMI), and Beck Depression Inventory were obtained at this visit. Subjects with a BMI ≥ 30 kg/m2 were included in the obesity group, and the relationship between glutamic acid consumption and BDI scores was analyzed after controlling for age, race, sex, antidepressant and antipsychotic use, and animal and vegetable protein intake which provide natural forms of dietary glutamic acid. Results: A total of 168 participants were included in this study, of which 42.5% were female and 52.9% were White. The mean BMI for the group as a whole was 33.5 ± 8.7 (kg/m2) and the mean BDI was 14.5 ± 10.2 (range 2-50). No differences were found between obesity groups, other than a greater hyperlipidemia, hypertension, and lower waist to hip ratio. Overall, no relationship was found between dietary glutamic acid and BDI scores, However, for non-obese participants, diets higher levels of glutamic acid were associated with greater depression symptomatology (p = 0.021). Conclusion: These preliminary results indicate a possible correlation between dietary glutamic acid a depressive symptoms in non-obese patients with schizophrenia, although further research is needed to specifically examine this relationship.
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Affiliation(s)
- Pooja Kumar
- College of Pharmacy, University of Michigan, Ann Arbor, MI, United States.,Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - A Zarina Kraal
- College of Pharmacy, University of Michigan, Ann Arbor, MI, United States.,Department of Psychiatry, School of Medicine, Medical University of South Carolina, Charleston, SC, United States
| | - Andreas M Prawdzik
- College of Pharmacy, University of Michigan, Ann Arbor, MI, United States.,Department of Mathematics, Central Michigan University, Mount Pleasant, MI, United States
| | | | - Vicki Ellingrod
- College of Pharmacy, University of Michigan, Ann Arbor, MI, United States.,Department of Psychiatry, School of Medicine, University of Michigan, Ann Arbor, MI, United States
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