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DeDecker L, Coppedge B, Avelar-Barragan J, Karnes W, Whiteson K. Microbiome distinctions between the CRC carcinogenic pathways. Gut Microbes 2021; 13:1854641. [PMID: 33446008 PMCID: PMC8288036 DOI: 10.1080/19490976.2020.1854641] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Revised: 10/01/2020] [Accepted: 11/10/2020] [Indexed: 02/06/2023] Open
Abstract
Colorectal cancer (CRC) is the third most commonly diagnosed cancer, the third leading cause of cancer-related deaths, and has been on the rise among young adults in the United States. Research has established that the colonic microbiome is different in patients with CRC compared to healthy controls, but few studies have investigated if and how the microbiome may relate to CRC progression through the serrated pathway versus the adenoma-carcinoma sequence.Our view is that progress in CRC microbiome research requires consideration of how the microbiome may contribute to CRC carcinogenesis through the distinct pathways that lead to CRC, which could enable the creation of novel and tailored prevention, screening, and therapeutic interventions. We first highlight the limitations in existing CRC microbiome research and offer corresponding solutions for investigating the microbiome's role in the adenoma-carcinoma sequence and serrated pathway. We then summarize the findings in the select human studies that included data points related to the two major carcinogenic pathways. These studies investigate the microbiome in CRC carcinogenesis and 1) utilize mucosal samples and 2) compare polyps or tumors by histopathologic type, molecular/genetic type, or location in the colon.Key findings from these studies include: 1) Fusobacterium is associated with right-sided, more advanced, and serrated lesions; 2) the colons of people with CRC have bacteria typically associated with normal oral flora; and 3) colons from people with CRC have more biofilms, and these biofilms are predominantly located in the proximal colon (single study).
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Affiliation(s)
- Lauren DeDecker
- School of Medicine, University of California, Irvine, California, USA
| | - Bretton Coppedge
- School of Biological Sciences, University of California, Irvine, California, USA
| | | | - William Karnes
- School of Medicine, University of California, Irvine, California, USA
| | - Katrine Whiteson
- School of Biological Sciences, University of California, Irvine, California, USA
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Branched chain amino acids improve mesenchymal stem cell proliferation, reducing nuclear factor kappa B expression and modulating some inflammatory properties. Nutrition 2020; 78:110935. [DOI: 10.1016/j.nut.2020.110935] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 05/28/2020] [Accepted: 06/01/2020] [Indexed: 12/24/2022]
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Kracht M, Müller-Ladner U, Schmitz ML. Mutual regulation of metabolic processes and proinflammatory NF-κB signaling. J Allergy Clin Immunol 2020; 146:694-705. [PMID: 32771559 DOI: 10.1016/j.jaci.2020.07.027] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 07/16/2020] [Accepted: 07/28/2020] [Indexed: 12/27/2022]
Abstract
The nuclear factor kappa B (NF-κB) signaling system, a key regulator of immunologic processes, also affects a plethora of metabolic changes associated with inflammation and the immune response. NF-κB-regulating signaling cascades, in concert with NF-κB-mediated transcriptional events, control the metabolism at several levels. NF-κB modulates apical components of metabolic processes including metabolic hormones such as insulin and glucagon, the cellular master switches 5' AMP-activated protein kinase and mTOR, and also numerous metabolic enzymes and their respective regulators. Vice versa, metabolic enzymes and their products also exert multilevel control of NF-κB activity, thereby creating a highly connected regulatory network. These insights have resulted in the identification of the noncanonical IκB kinase kinases IκB kinase ɛ and TBK1, which are upregulated by overnutrition, and may therefore be suitable potential therapeutic targets for metabolic syndromes. An inhibitor interfering with the activity of both kinases reduces obesity-related metabolic dysfunctions in mouse models and the encouraging results from a recent clinical trial indicate that targeting these NF-κB pathway components improves glucose homeostasis in a subset of patients with type 2 diabetes.
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Affiliation(s)
- Michael Kracht
- Rudolf Buchheim-Institute of Pharmacology, Justus-Liebig-University, Giessen, Germany
| | - Ulf Müller-Ladner
- Department of Rheumatology and Clinical Immunology, Justus-Liebig-University, Campus Kerckhoff, Bad Nauheim, Germany
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Petry ÉR, Dresch DDF, Carvalho C, Medeiros PC, Rosa TG, de Oliveira CM, Martins LAM, Schemitt E, Bona S, Guma FCR, Marroni NP, Wannmacher CMD. Oral glutamine supplementation attenuates inflammation and oxidative stress-mediated skeletal muscle protein content degradation in immobilized rats: Role of 70 kDa heat shock protein. Free Radic Biol Med 2019; 145:87-102. [PMID: 31505269 DOI: 10.1016/j.freeradbiomed.2019.08.033] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 08/19/2019] [Accepted: 08/30/2019] [Indexed: 12/19/2022]
Abstract
Skeletal muscle disuse results in myofibrillar atrophy and protein degradation, via inflammatory and oxidative stress-mediated NF-kB signaling pathway activation. Nutritional interventions, such as l-glutamine (GLN) supplementation have shown antioxidant properties and cytoprotective effects through the modulation on the 70-kDa heat shock protein (HSP70) expression. However, these GLN-mediated effects on cell signaling pathways and biochemical mechanisms that control the myofibrillar protein content degradation in muscle disuse situations are poorly known yet. This study investigated the effects of oral GLN plus l-alanine (ALA; GLN + ALA-solution) supplementation, either in their free or dipeptide (L-alanyl-l-glutamine-DIP) form, on GLN-glutathione (GSH) axis and cytoprotection mediated by HSP70 protein expression in the slow-twitch soleus and fast-twitch gastrocnemius skeletal muscle of rats submitted to 14-days of hindlimb immobilization-induced disuse muscle atrophy. Forty-eight Wistar rats were distributed into 6 groups: hindlimb immobilized (IMOB group) and hindlimb immobilized orally supplemented with either GLN (1 g kg-1) plus ALA (0.61 g kg-1) (GLN + ALA-IMOB group) or 1.49 g kg-1 of DIP (DIP-IMOB group) and; no-immobilized (CTRL) and no-immobilized supplemented GLN + ALA and DIP baselines groups. All animals, including CTRL and IMOB rats (water), were supplemented via intragastric gavage for 14 days, concomitantly to immobilization period. Plasma and muscle GLN levels, lipid (thiobarbituric acid reactive substances-TBARS) and protein (carbonyl) peroxidation, erythrocyte concentration of reduced GSH and GSH disulfide (GSSG), plasma and muscle pro-inflammatory TNF-α levels, muscle IKKα/β-NF-kB signaling pathway and, the myofibrillar protein content (MPC) were measured. The MPC was significantly lower in IMOB rats, compared to CTRL, GLN + ALA, and DIP animals (p < 0.05). This finding was associated with reduced plasma and muscle GLN concentration, equally in IMOB animals. Conversely, both GLN + ALA and DIP supplementation restored plasma and muscle GLN levels, which equilibrated GSH and intracellular redox status (GSSG/GSH ratio) in erythrocytes and skeletal muscle even as, increased muscle HSP70 protein expression; attenuating oxidative stress and TNF-α-mediated NF-kB pathway activation, fact that reverberated on reduction of MPC degradation in GLN + ALA-IMOB and DIP-IMOB animals (p < 0.05). In conclusion, the findings shown herein support the oral GLN + ALA and DIP supplementations as a therapeutic and effective nutritional alternative to attenuate the deleterious effects of the skeletal muscle protein degradation induced by muscle disuse.
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Affiliation(s)
- Éder Ricardo Petry
- Post-Graduate Program in Biological Sciences: Biochemistry, Institute of Basic Health Sciences (ICBS), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil; Department of Biochemistry, ICBS, UFRGS, Porto Alegre, Rio Grande do Sul, Brazil.
| | | | - Clarice Carvalho
- Department of Biochemistry, ICBS, UFRGS, Porto Alegre, Rio Grande do Sul, Brazil
| | | | - Tatiana Gomes Rosa
- Famaqui - Mario Quintana Faculty, Porto Alegre, Rio Grande do Sul, Brazil
| | - Cleverson Morais de Oliveira
- Post-Graduate Program in Biological Sciences: Biochemistry, Institute of Basic Health Sciences (ICBS), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil; Department of Biochemistry, ICBS, UFRGS, Porto Alegre, Rio Grande do Sul, Brazil
| | - Leo Anderson Meira Martins
- Post-Graduate Program in Biological Sciences: Biochemistry, Institute of Basic Health Sciences (ICBS), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil; Department of Biochemistry, ICBS, UFRGS, Porto Alegre, Rio Grande do Sul, Brazil
| | - Elizangêla Schemitt
- Post-Graduate Program in Medicine: Medical Sciences, UFRGS, Porto Alegre, Rio Grande do Sul, Brazil; Laboratory of Experimental Hepatology and Gastroenterology, Experimental Research Center, Clinical Hospital of Porto Alegre (HCPA), UFRGS, Porto Alegre, Rio Grande do Sul, Brazil
| | - Silvia Bona
- Post-Graduate Program in Medicine: Medical Sciences, UFRGS, Porto Alegre, Rio Grande do Sul, Brazil; Laboratory of Experimental Hepatology and Gastroenterology, Experimental Research Center, Clinical Hospital of Porto Alegre (HCPA), UFRGS, Porto Alegre, Rio Grande do Sul, Brazil
| | - Fátima Costa Rodrigues Guma
- Post-Graduate Program in Biological Sciences: Biochemistry, Institute of Basic Health Sciences (ICBS), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil; Department of Biochemistry, ICBS, UFRGS, Porto Alegre, Rio Grande do Sul, Brazil
| | - Norma Possas Marroni
- Post-Graduate Program in Medicine: Medical Sciences, UFRGS, Porto Alegre, Rio Grande do Sul, Brazil; Laboratory of Experimental Hepatology and Gastroenterology, Experimental Research Center, Clinical Hospital of Porto Alegre (HCPA), UFRGS, Porto Alegre, Rio Grande do Sul, Brazil
| | - Clóvis Milton Duval Wannmacher
- Post-Graduate Program in Biological Sciences: Biochemistry, Institute of Basic Health Sciences (ICBS), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil; Department of Biochemistry, ICBS, UFRGS, Porto Alegre, Rio Grande do Sul, Brazil
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Zhang X, Tan X, Liu Y, You W, Liu G, Liu X, Jin Q, Wei C, Wan F, Zhao H. Alanyl-glutamine ameliorates lipopolysaccharide-induced inflammation and barrier function injury in bovine jejunum epithelial cells. Biochem Cell Biol 2019; 97:670-680. [PMID: 30773024 DOI: 10.1139/bcb-2018-0320] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The aim of this study was to investigate the effects of alanyl-glutamine (Ala-Gln) on the regulation of lipopolysaccharide (LPS)-induced inflammation and barrier function in bovine jejunum epithelial cells (BJECs). BJECs were exposed (or not) to 1 μg/mL LPS for 24 h to generate a pro-inflammatory model. The cells were then treated with different concentrations of Ala-Gln (0.25, 0.5, 1.0, 2.0, or 4.0 mmol/L) to detect any regulatory effects on the inflammation and barrier function of BJECs. LPS decreased cell viability and enhanced the production of the pro-inflammatory cytokines interleukin (IL)-6 and IL-8. LPS induced inflammation and damaged the barrier function of BJECs, as evidenced by up-regulated mRNA and protein expression of inflammatory factors and down-regulated expression of tight junction proteins. Conversely, Ala-Gln rescued the decrease in cell viability and prevented the accumulation of ILs after LPS exposure by reducing the mRNA and protein expression levels of inflammatory factors. In addition, Ala-Gln induced the mRNA and protein expression of multiple tight junction proteins, and thus reconstituted the barrier function of BJECs. In conclusion, Ala-Gln attenuates injury from inflammation and repairs damaged intestinal barrier induced with LPS, suggesting its potential as a therapeutic agent against intestinal inflammation in mammals.
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Affiliation(s)
- Xianglun Zhang
- Institute of Animal Science and Veterinary Medicine, Shandong Key Lab of Animal Disease Control and Breeding, Shandong Provincial Testing Center of Beef Cattle Performance, Shandong Provincial Engineering Technology Center of Animal Healthy Breeding, Shandong Academy of Agricultural Sciences, Jinan 250100, People's Republic of China
| | - Xiuwen Tan
- Institute of Animal Science and Veterinary Medicine, Shandong Key Lab of Animal Disease Control and Breeding, Shandong Provincial Testing Center of Beef Cattle Performance, Shandong Provincial Engineering Technology Center of Animal Healthy Breeding, Shandong Academy of Agricultural Sciences, Jinan 250100, People's Republic of China
| | - Yifan Liu
- Institute of Animal Science and Veterinary Medicine, Shandong Key Lab of Animal Disease Control and Breeding, Shandong Provincial Testing Center of Beef Cattle Performance, Shandong Provincial Engineering Technology Center of Animal Healthy Breeding, Shandong Academy of Agricultural Sciences, Jinan 250100, People's Republic of China
| | - Wei You
- Institute of Animal Science and Veterinary Medicine, Shandong Key Lab of Animal Disease Control and Breeding, Shandong Provincial Testing Center of Beef Cattle Performance, Shandong Provincial Engineering Technology Center of Animal Healthy Breeding, Shandong Academy of Agricultural Sciences, Jinan 250100, People's Republic of China
| | - Guifen Liu
- Institute of Animal Science and Veterinary Medicine, Shandong Key Lab of Animal Disease Control and Breeding, Shandong Provincial Testing Center of Beef Cattle Performance, Shandong Provincial Engineering Technology Center of Animal Healthy Breeding, Shandong Academy of Agricultural Sciences, Jinan 250100, People's Republic of China
| | - Xiaomu Liu
- Institute of Animal Science and Veterinary Medicine, Shandong Key Lab of Animal Disease Control and Breeding, Shandong Provincial Testing Center of Beef Cattle Performance, Shandong Provincial Engineering Technology Center of Animal Healthy Breeding, Shandong Academy of Agricultural Sciences, Jinan 250100, People's Republic of China
| | - Qing Jin
- Institute of Animal Science and Veterinary Medicine, Shandong Key Lab of Animal Disease Control and Breeding, Shandong Provincial Testing Center of Beef Cattle Performance, Shandong Provincial Engineering Technology Center of Animal Healthy Breeding, Shandong Academy of Agricultural Sciences, Jinan 250100, People's Republic of China
| | - Chen Wei
- Institute of Animal Science and Veterinary Medicine, Shandong Key Lab of Animal Disease Control and Breeding, Shandong Provincial Testing Center of Beef Cattle Performance, Shandong Provincial Engineering Technology Center of Animal Healthy Breeding, Shandong Academy of Agricultural Sciences, Jinan 250100, People's Republic of China
| | - Fachun Wan
- Institute of Animal Science and Veterinary Medicine, Shandong Key Lab of Animal Disease Control and Breeding, Shandong Provincial Testing Center of Beef Cattle Performance, Shandong Provincial Engineering Technology Center of Animal Healthy Breeding, Shandong Academy of Agricultural Sciences, Jinan 250100, People's Republic of China.,College of Life Sciences, Shandong Normal University, Jinan 250114, People's Republic of China
| | - Hongbo Zhao
- Institute of Animal Science and Veterinary Medicine, Shandong Key Lab of Animal Disease Control and Breeding, Shandong Provincial Testing Center of Beef Cattle Performance, Shandong Provincial Engineering Technology Center of Animal Healthy Breeding, Shandong Academy of Agricultural Sciences, Jinan 250100, People's Republic of China
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Exogenous glutamine impairs neutrophils migration into infections sites elicited by lipopolysaccharide by a multistep mechanism. Amino Acids 2018; 51:451-462. [PMID: 30449005 DOI: 10.1007/s00726-018-2679-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 11/09/2018] [Indexed: 12/19/2022]
Abstract
Glutamine (GLN) is the most abundant free amino acid in the body, and is considered as a conditionally essential amino acid under stress conditions, acting as an important modulator of the immune response. We here investigated the role of exogenous GLN treatment on leukocyte migration after the onset of endotoxemia and the intracellular mechanisms of GLN actions on neutrophils. Two in vivo models of endotoxemia caused by lipopolysaccharide of Escherichia coli (LPS) injection were carried out in male outbred Balb/C mice 2-3 months old, as follow: (1) LPS (50 μg/kg) was intravenously injected 1 h prior to intravenous injection of GLN (0.75 mg/kg) and samples were collected 2 h later to investigate the role of GLN on the acute lung inflammation; (2) LPS (1 mg/kg) was intraperitoneally injected 1 h prior to intravenous injection of GLN (0.75 mg/kg) and samples were collected 18 h later to measure the effects of GLN on local and later phases of inflammation in the peritoneum. Results showed that GLN administration reduced the number of neutrophils in the inflamed lungs, partially recovery of the reduced number of leukocytes in the blood; reduced adhesion molecules on lung endothelium and on circulating neutrophils. Moreover, GLN treatment diminished the number of neutrophils, levels of chemotactic cytokine CXCL2 in the inflamed peritoneum, and neutrophils collected from the peritoneum of GLN-treated mice presented lower levels of Rho, Rac, and JNK. Together, our data show novel mechanisms involved in the actions of GLN on neutrophils migration.
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Cruzat V, Macedo Rogero M, Noel Keane K, Curi R, Newsholme P. Glutamine: Metabolism and Immune Function, Supplementation and Clinical Translation. Nutrients 2018; 10:nu10111564. [PMID: 30360490 PMCID: PMC6266414 DOI: 10.3390/nu10111564] [Citation(s) in RCA: 523] [Impact Index Per Article: 87.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Revised: 10/13/2018] [Accepted: 10/16/2018] [Indexed: 02/07/2023] Open
Abstract
Glutamine is the most abundant and versatile amino acid in the body. In health and disease, the rate of glutamine consumption by immune cells is similar or greater than glucose. For instance, in vitro and in vivo studies have determined that glutamine is an essential nutrient for lymphocyte proliferation and cytokine production, macrophage phagocytic plus secretory activities, and neutrophil bacterial killing. Glutamine release to the circulation and availability is mainly controlled by key metabolic organs, such as the gut, liver, and skeletal muscles. During catabolic/hypercatabolic situations glutamine can become essential for metabolic function, but its availability may be compromised due to the impairment of homeostasis in the inter-tissue metabolism of amino acids. For this reason, glutamine is currently part of clinical nutrition supplementation protocols and/or recommended for immune suppressed individuals. However, in a wide range of catabolic/hypercatabolic situations (e.g., ill/critically ill, post-trauma, sepsis, exhausted athletes), it is currently difficult to determine whether glutamine supplementation (oral/enteral or parenteral) should be recommended based on the amino acid plasma/bloodstream concentration (also known as glutaminemia). Although the beneficial immune-based effects of glutamine supplementation are already established, many questions and evidence for positive in vivo outcomes still remain to be presented. Therefore, this paper provides an integrated review of how glutamine metabolism in key organs is important to cells of the immune system. We also discuss glutamine metabolism and action, and important issues related to the effects of glutamine supplementation in catabolic situations.
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Affiliation(s)
- Vinicius Cruzat
- School of Pharmacy and Biomedical Sciences, Curtin Health Innovation Research Institute, Biosciences, Curtin University, Perth 6102, Australia.
- Faculty of Health, Torrens University, Melbourne 3065, Australia.
| | - Marcelo Macedo Rogero
- Department of Nutrition, Faculty of Public Health, University of São Paulo, Avenida Doutor Arnaldo 715, São Paulo 01246-904, Brazil.
| | - Kevin Noel Keane
- School of Pharmacy and Biomedical Sciences, Curtin Health Innovation Research Institute, Biosciences, Curtin University, Perth 6102, Australia.
| | - Rui Curi
- Interdisciplinary Post-Graduate Program in Health Sciences, Cruzeiro do Sul University, São Paulo 01506-000, Brazil.
| | - Philip Newsholme
- School of Pharmacy and Biomedical Sciences, Curtin Health Innovation Research Institute, Biosciences, Curtin University, Perth 6102, Australia.
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Cruzat V, Macedo Rogero M, Noel Keane K, Curi R, Newsholme P. Glutamine: Metabolism and Immune Function, Supplementation and Clinical Translation. Nutrients 2018. [PMID: 30360490 DOI: 10.20944/preprints201809.0459.v1] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Glutamine is the most abundant and versatile amino acid in the body. In health and disease, the rate of glutamine consumption by immune cells is similar or greater than glucose. For instance, in vitro and in vivo studies have determined that glutamine is an essential nutrient for lymphocyte proliferation and cytokine production, macrophage phagocytic plus secretory activities, and neutrophil bacterial killing. Glutamine release to the circulation and availability is mainly controlled by key metabolic organs, such as the gut, liver, and skeletal muscles. During catabolic/hypercatabolic situations glutamine can become essential for metabolic function, but its availability may be compromised due to the impairment of homeostasis in the inter-tissue metabolism of amino acids. For this reason, glutamine is currently part of clinical nutrition supplementation protocols and/or recommended for immune suppressed individuals. However, in a wide range of catabolic/hypercatabolic situations (e.g., ill/critically ill, post-trauma, sepsis, exhausted athletes), it is currently difficult to determine whether glutamine supplementation (oral/enteral or parenteral) should be recommended based on the amino acid plasma/bloodstream concentration (also known as glutaminemia). Although the beneficial immune-based effects of glutamine supplementation are already established, many questions and evidence for positive in vivo outcomes still remain to be presented. Therefore, this paper provides an integrated review of how glutamine metabolism in key organs is important to cells of the immune system. We also discuss glutamine metabolism and action, and important issues related to the effects of glutamine supplementation in catabolic situations.
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Affiliation(s)
- Vinicius Cruzat
- School of Pharmacy and Biomedical Sciences, Curtin Health Innovation Research Institute, Biosciences, Curtin University, Perth 6102, Australia. .,Faculty of Health, Torrens University, Melbourne 3065, Australia.
| | - Marcelo Macedo Rogero
- Department of Nutrition, Faculty of Public Health, University of São Paulo, Avenida Doutor Arnaldo 715, São Paulo 01246-904, Brazil.
| | - Kevin Noel Keane
- School of Pharmacy and Biomedical Sciences, Curtin Health Innovation Research Institute, Biosciences, Curtin University, Perth 6102, Australia.
| | - Rui Curi
- Interdisciplinary Post-Graduate Program in Health Sciences, Cruzeiro do Sul University, São Paulo 01506-000, Brazil.
| | - Philip Newsholme
- School of Pharmacy and Biomedical Sciences, Curtin Health Innovation Research Institute, Biosciences, Curtin University, Perth 6102, Australia.
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Robertson LM, Fletcher NM, Diamond MP, Saed GM. Evitar (l-Alanyl-l-Glutamine) Regulates Key Signaling Molecules in the Pathogenesis of Postoperative Tissue Fibrosis. Reprod Sci 2018; 26:724-733. [DOI: 10.1177/1933719118789511] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Aims:Hypoxia and the resulting oxidative stress play a major role in postoperative tissue fibrosis. The objective of this study was to determine the effect of l-alanyl-l-glutamine (Ala-Gln) on key markers of postoperative tissue fibrosis: hypoxia-inducible factor (HIF) 1α and type I collagen.Methods:Primary cultures of human normal peritoneal fibroblasts (NPF) established from normal peritoneal tissue were treated with increasing doses of Ala-Gln (0, 1, 2, or 10 mM) with hypoxia ([2% O2] 0-48 hours; continuous hypoxia) or after hypoxia (0.5, 1, 2, 4 hours) and restoration of normoxia (episodic hypoxia) with immediate treatment with Ala-Gln. Hypoxia-inducible factor 1α and type 1 collagen levels were determined by enzyme-linked immunosorbent assay. Data were analyzed with 1-way analysis of variance followed by Tukey tests with Bonferroni correction.Results:Hypoxia-inducible factor 1α and type I collagen levels increased in untreated controls by 3- to 4-fold in response to continuous and episodic hypoxia in human NPF. Under continuous hypoxia, HIF-1α and type I collagen levels were suppressed by Ala-Gln in a dose-dependent manner. l-alanyl-l-glutamine treatment after episodic hypoxia also suppressed HIF-1α and type I collagen levels for up to 24 hours for all doses and up to 48 hours at the highest dose, regardless of exposure time to hypoxia.Conclusions:l-alanyl-l-glutamine significantly suppressed hypoxia-induced levels of key tissue fibrosis (adhesion) phenotype markers under conditions of continuous as well as episodic hypoxia in vitro. This effect of glutamine on molecular events involved in the cellular response to insult or injury suggests potential therapeutic value for glutamine in the prevention of postoperative tissue fibrosis.
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Affiliation(s)
| | - Nicole M. Fletcher
- Department of Obstetrics and Gynecology, Wayne State University, Detroit, MI, USA
| | - Michael P. Diamond
- Department of Obstetrics and Gynecology, Augusta University, Augusta, GA, USA
| | - Ghassan M. Saed
- Department of Obstetrics and Gynecology, Wayne State University, Detroit, MI, USA
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C de Oliveira D, Santos EW, Nogueira-Pedro A, Xavier JG, Borelli P, Fock RA. Effects of short-term dietary restriction and glutamine supplementation in vitro on the modulation of inflammatory properties. Nutrition 2018; 48:96-104. [PMID: 29469028 DOI: 10.1016/j.nut.2017.11.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2017] [Revised: 10/21/2017] [Accepted: 11/04/2017] [Indexed: 10/18/2022]
Abstract
OBJECTIVE Dietary restriction (DR) is a nutritional intervention that exerts profound effects on biochemical and immunologic parameters, modulating some inflammatory properties. Glutamine (GLN) is a conditionally essential amino acid that can modulate inflammatory properties. However, there is a lack of data evaluating the effects of DR and GLN supplementation, especially in relation to inflammatory cytokine production and the expression of transcription factors such as nuclear factor (NF)-κB. METHODS We subjected 3-mo-old male Balb/c mice to DR by reducing their food intake by 30%. DR animals lost weight and showed reduced levels of serum triacylglycerols, glucose, cholesterol, and calcium as well as a reduction in bone density. Additionally, blood, peritoneal, and spleen cellularity were reduced, lowering the number of peritoneal F4/80- and CD86-positive cells and the total number of splenic CD4- and CD8-positive cells. RESULTS The production of interleukin (IL)-10 and the expression of NF-κB in splenic cells were not affected by DR or by GLN supplementation. However, peritoneal macrophages from DR animals showed reduced IL-12 and tumor necrosis factor-α production and increased IL-10 production with reduced phosphorylation of NF-κB expression. Additionally, GLN was able to modulate cytokine production by peritoneal cells from the control group, although no effects were observed in cells from the DR group. CONCLUSION DR induces biochemical and immunologic changes, in particular by reducing IL-12 and tumor necrosis factor-α production by macrophages and clearly upregulating IL-10 production, whereas GLN supplementation did not modify these parameters in cells from DR animals.
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Affiliation(s)
- Dalila C de Oliveira
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil.
| | - Ed Wilson Santos
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | - Amanda Nogueira-Pedro
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | - José Guilherme Xavier
- School of Veterinary Medicine, Institute of Health Science Paulista University, Sao Paulo, Brazil
| | - Primavera Borelli
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | - Ricardo Ambrósio Fock
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
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Mazzone M, Menga A, Castegna A. Metabolism and TAM functions-it takes two to tango. FEBS J 2017; 285:700-716. [DOI: 10.1111/febs.14295] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 09/25/2017] [Accepted: 10/17/2017] [Indexed: 12/16/2022]
Affiliation(s)
- Massimiliano Mazzone
- Laboratory of Tumor Inflammation and Angiogenesis; Center for Cancer Biology (CCB); VIB; Leuven Belgium
- Laboratory of Tumor Inflammation and Angiogenesis; Department of Oncology; KU Leuven; Belgium
| | - Alessio Menga
- Hematology Unit; National Cancer Research Center; Istituto Tumori ‘Giovanni Paolo II’; Bari Italy
| | - Alessandra Castegna
- Hematology Unit; National Cancer Research Center; Istituto Tumori ‘Giovanni Paolo II’; Bari Italy
- Department of Biosciences, Biotechnologies and Biopharmaceutics; University of Bari; Italy
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Leite JSM, Cruzat VF, Krause M, Homem de Bittencourt PI. Physiological regulation of the heat shock response by glutamine: implications for chronic low-grade inflammatory diseases in age-related conditions. ACTA ACUST UNITED AC 2016. [DOI: 10.1186/s41110-016-0021-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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de Oliveira DC, da Silva Lima F, Sartori T, Santos ACA, Rogero MM, Fock RA. Glutamine metabolism and its effects on immune response: molecular mechanism and gene expression. ACTA ACUST UNITED AC 2016. [DOI: 10.1186/s41110-016-0016-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Effect of parenteral glutamine supplementation combined with enteral nutrition on Hsp90 expression and lymphoid organ apoptosis in severely burned rats. Burns 2016; 42:1494-1506. [PMID: 27613477 DOI: 10.1016/j.burns.2016.02.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2015] [Revised: 02/09/2016] [Accepted: 02/11/2016] [Indexed: 12/17/2022]
Abstract
OBJECTIVE The aim of this study is to investigate the effects of parenteral glutamine(GLN) supplementation combined with enteral nutrition (EN) on heat shock protein 90(Hsp90) expression, apoptosis of lymphoid organs and circulating lymphocytes, immunological function and survival in severely burned rats. METHODS Male SD rats were randomly assigned into 4 groups: a sham burn+EN+GLN-free amino acid (AA) group (n=10), a sham burn+EN+GLN group (n=10), a burn+EN+AA group (n=10), and a burn +EN +GLN group (n=10). Two hours after a 30% total body surface area (TBSA), full-thickness scald burn injury on the back was made, the burned rats in two experimental groups (the burn+EN+AA group and the burn+EN +GLN group) were fed with a conventional enteral nutrition solution by oral gavage for 7 days. Simultaneously, the rats in the burn+EN+GLN group were given 0.35g GLN/kg body weight/day once via a tail vein injection for 7 days, whereas those in the burn+EN+AA group were administered isocaloric/isonitrogenous GLN-free amino acid solution (Tyrosine) for comparison. The rats in two sham burn control groups (the sham burn+EN+AA group and the sham burn+EN +GLN group) were treated in the same procedure as above, except for burn injury. All rats in each of the four groups were given 175kcal/kg body wt/day. There was isonitrogenous, isovolumic and isocaloric intake among four groups. At the end of the 7th day after nutritional programme were finished, all rats were anesthetized and samples were collected for further analysis. Serum immunoglobulin quantification was conducted by ELISA. Circulating lymphocyte numbers were counted by Coulter LH-750 Analyzer. The percentages and apoptotic ratio of CD4 and CD8T lymphocytes in circulation were determined by flow cytometry (FCM). The neutrophil phagocytosis index (NPI) was examined. The GLN concentrations in plasma, thymus, spleen and skeletal muscle were measured by high performance liquid chromatography (HPLC). The organ index evaluation and TUNEL analysis of thymus and spleen were carried out. The expression of Hsp90 in thymus and spleen was analyzed by western blotting. Moreover, the survival in burned rats was observed. RESULTS The results revealed that parenteral GLN supplementation combined with EN significantly increased the GLN concentrations of plasma and tissues, the serum immunoglobulin content, the circulating lymphocyte number, the CD4/CD8 ratio, the indexes of thymus and spleen, NPI and survival as compared with the burn+EN+AA group (p<0.05). The expression of Hsp90 in thymus and spleen in the burn+EN+GLN group was significantly up-regulated as compared with the burn+EN+AA group (p<0.05). The apoptosis in circulating CD4 and CD8 lymphocytes, thymus and spleen in the burn+EN+GLN group was significantly decreased as compared with the burn+EN+AA group (p<0.05). CONCLUSION The results of this study show that parenteral GLN supplementation combined with EN may increase the GLN concentrations of plasma and tissues, up-regulate the expression of Hsp90, attenuate apoptosis in lymphoid organ and circulating lymphocyte, enhance the immunological function and improve survival in severely burned rats. Clinically, therapeutic efforts at the modulation of the immune dysfunction may contribute to a favorable outcome in severely burned patients.
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Jiang P, Stanstrup J, Thymann T, Sangild PT, Dragsted LO. Progressive Changes in the Plasma Metabolome during Malnutrition in Juvenile Pigs. J Proteome Res 2015; 15:447-56. [PMID: 26626656 DOI: 10.1021/acs.jproteome.5b00782] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Severe acute malnutrition (SAM) is one of the leading nutrition-related causes of death in children under five years of age. The clinical features of SAM are well documented, but a comprehensive understanding of the development from a normal physiological state to SAM is lacking. Characterizing the temporal metabolomic change may help to understand the disease progression and to define nutritional rehabilitation strategies. Using a piglet model we hypothesized that a progressing degree of malnutrition induces marked plasma metabolite changes. Four-week-old weaned pigs were fed a nutrient-deficient maize diet (MAL) or nutritionally optimized reference diet (REF) for 7 weeks. Plasma collected weekly was subjected to LC-MS for a nontargeted profiling of metabolites with abundance differentiation. The MAL pigs showed markedly reduced body-weight gain and lean-mass proportion relative to the REF pigs. Levels of eight essential and four nonessential amino acids showed a time-dependent deviation in the MAL pigs from that in the REF. Choline metabolites and gut microbiomic metabolites generally showed higher abundance in the MAL pigs. The results demonstrated that young malnourished pigs had a profoundly perturbed metabolism, and this provides basic knowledge about metabolic changes during malnourishment, which may be of help in designing targeted therapeutic foods for refeeding malnourished children.
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Affiliation(s)
- Pingping Jiang
- Department of Veterinary Clinical and Animal Sciences, University of Copenhagen , 68 Dyrlægevej, DK-1870 Frederiksberg C, Denmark
| | - Jan Stanstrup
- Department of Nutrition, Exercise and Sports, University of Copenhagen , 30 Rolighedsvej, DK-1958 Frederiksberg C, Denmark
| | - Thomas Thymann
- Department of Veterinary Clinical and Animal Sciences, University of Copenhagen , 68 Dyrlægevej, DK-1870 Frederiksberg C, Denmark
| | - Per Torp Sangild
- Department of Veterinary Clinical and Animal Sciences, University of Copenhagen , 68 Dyrlægevej, DK-1870 Frederiksberg C, Denmark
| | - Lars Ove Dragsted
- Department of Nutrition, Exercise and Sports, University of Copenhagen , 30 Rolighedsvej, DK-1958 Frederiksberg C, Denmark
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Sellmann C, Jin CJ, Degen C, De Bandt JP, Bergheim I. Oral Glutamine Supplementation Protects Female Mice from Nonalcoholic Steatohepatitis. J Nutr 2015; 145:2280-6. [PMID: 26246326 DOI: 10.3945/jn.115.215517] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Accepted: 07/15/2015] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Genetic factors, a diet rich in fat and sugar, and an impaired intestinal barrier function are critical in the development of nonalcoholic steatohepatitis (NASH). The nonessential amino acid glutamine (Gln) has been suggested to have protective effects on intestinal barrier function but also against the development of liver diseases of various etiologies. OBJECTIVE The effect of oral Gln supplementation on the development of Western-style diet (WSD)-induced NASH in mice was assessed. METHODS Female 6- to 8-wk-old C57BL/6J mice were pair-fed a control (C) diet or a WSD alone or supplemented with 2.1 g l-Gln/kg body weight for 6 wk (C+Gln or WSD+Gln). Indexes of liver damage, lipid peroxidation, and glucose metabolism and endotoxin concentrations were measured. RESULTS Although Gln supplementation had no effect on the loss of the tight junction protein occludin, the increased portal endotoxin and fasting glucose concentrations found in WSD-fed mice, markers of liver damage (e.g., nonalcoholic fatty liver disease activity score and number of neutrophils in the liver) were significantly lower in the WSD+Gln group than in the WSD group (~47% and ~60% less, respectively; P < 0.05). Concentrations of inducible nitric oxide synthase (iNOS) protein and 3-nitrotyrosin protein adducts were significantly higher in livers of WSD-fed mice than in all other groups (~8.6- and ~1.9-fold higher, respectively, compared with the C group; P < 0.05) but did not differ between WSD+Gln-, C-, and C+Gln-fed mice. Hepatic tumor necrosis factor α and plasminogen activator inhibitor 1 concentrations were significantly higher in WSD-fed mice (~1.6- and ~1.8-fold higher, respectively; P < 0.05) but not in WSD+Gln-fed mice compared with C mice. CONCLUSION Our data suggest that the protective effects of oral Gln supplementation on the development of WSD-induced NASH in mice are associated with protection against the induction of iNOS and lipid peroxidation in the liver.
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Affiliation(s)
- Cathrin Sellmann
- Institute of Nutritional Sciences, SD Model Systems of Molecular Nutrition, Friedrich-Schiller University Jena, Jena, Germany
| | - Cheng Jun Jin
- Institute of Nutritional Sciences, SD Model Systems of Molecular Nutrition, Friedrich-Schiller University Jena, Jena, Germany
| | - Christian Degen
- Institute of Nutritional Sciences, SD Model Systems of Molecular Nutrition, Friedrich-Schiller University Jena, Jena, Germany
| | - Jean-Pascal De Bandt
- Nutrition Biology Laboratory EA4466, Faculty of Pharmacy, Paris Descartes University, Sorbonne Paris Cité, Paris, France; and Clinical Chemistry Department, Paris Center University Hospitals, Public Assistance Hospitals of Paris, Paris, France
| | - Ina Bergheim
- Institute of Nutritional Sciences, SD Model Systems of Molecular Nutrition, Friedrich-Schiller University Jena, Jena, Germany;
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Macrophages and iron trafficking at the birth and death of red cells. Blood 2015; 125:2893-7. [PMID: 25778532 DOI: 10.1182/blood-2014-12-567776] [Citation(s) in RCA: 122] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Accepted: 03/05/2015] [Indexed: 01/25/2023] Open
Abstract
Macrophages play a critical role in iron homeostasis via their intimate association with developing and dying red cells. Central nurse macrophages promote erythropoiesis in the erythroblastic island niche. These macrophages make physical contact with erythroblasts, enabling signaling and the transfer of growth factors and possibly nutrients to the cells in their care. Human mature red cells have a lifespan of 120 days before they become senescent and again come into contact with macrophages. Phagocytosis of red blood cells is the main source of iron flux in the body, because heme must be recycled from approximately 270 billion hemoglobin molecules in each red cell, and roughly 2 million senescent red cells are recycled each second. Here we will review pathways for iron trafficking found at the macrophage-erythroid axis, with a focus on possible roles for the transport of heme in toto.
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Fan J, Li G, Wu L, Tao S, Wang W, Sheng Z, Meng Q. Parenteral glutamine supplementation in combination with enteral nutrition improves intestinal immunity in septic rats. Nutrition 2014; 31:766-74. [PMID: 25837225 DOI: 10.1016/j.nut.2014.11.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 11/15/2014] [Accepted: 11/29/2014] [Indexed: 01/27/2023]
Abstract
OBJECTIVES The gut-associated lymphoid tissue is continuously exposed to antigens in the gut lumen and becomes the first line of defense against enteric bacteria and associated toxin. The aim of this study was to investigate the effects of parenteral glutamine (GLN) supplementation in combination with enteral nutrition (EN) on intestinal mucosal immunity in septic rats by cecal ligation and puncture (CLP). METHODS Male Sprague-Dawley rats were randomly assigned into four groups: A sham CLP + EN + saline group (n = 10), a sham CLP + EN + GLN group (n = 10), a CLP + EN + saline group (n = 10), and a CLP + EN + GLN group (n = 10). At 2 h after CLP or sham CLP, all rats in each of the four groups received an identical enteral nutrition solution as their base formula. Then, the rats in the sham CLP + EN + GLN group and CLP + EN + GLN group were given 0.35 g GLN/kg body weight daily for 7 d, all at the same time, via a tail vein injection; whereas those in the sham CLP + EN + saline group and CLP + EN + saline group were daily administered isovolumic sterile 0.9% saline for comparison. All rats in each of the four groups were given 290 kcal/kg body wt/d for 7 d. At the end of the seventh day after the nutritional program was finished, all rats were euthanized and the entire intestine was collected. Total Peyer's patches (PP) cell yield was counted by a hemocytometer. The percentage of PP lymphocyte subsets was analyzed by flow cytometry. The number of intestinal lamina propria IgA plasma cells was determined by the immunohistochemistry technique. The intestinal immunoglobulin A (IgA) levels were assessed by ELISA. PP apoptosis was evaluated by terminal deoxyuridine nick-end labeling. RESULTS The results revealed total PP cell yield, the numbers of PP lymphocyte subsets, intestinal lamina propria IgA plasma cells, and intestinal IgA levels in the CLP + EN + GLN group were significantly increased when compared with the CLP + EN + saline group (P < 0.05). On the other hand, the number of TUNEL-stained cells within PPs in the CLP + EN + GLN group was markedly decreased as compared with the CLP + EN + saline group (P < 0.05). CONCLUSION The results of this study show that parenteral glutamine supplementation in combination with enteral nutrition may attenuate PP apoptosis, increase PP cell yield and intestinal lamina propria IgA plasma cells, and subsequently improve intestinal mucosal immunity. Clinically, these results suggest therapeutic efforts at improving intestinal immunity may contribute to the prevention and treatment of sepsis.
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Affiliation(s)
- Jun Fan
- Department of Emergency and Critical Care Medicine, The Second Affiliated Hospital of Nanchang University, Jiangxi, P.R. China.
| | - Guoping Li
- Department of Emergency and Critical Care Medicine, The Second Affiliated Hospital of Nanchang University, Jiangxi, P.R. China
| | - Lidong Wu
- Department of Emergency and Critical Care Medicine, The Second Affiliated Hospital of Nanchang University, Jiangxi, P.R. China
| | - Shaoyu Tao
- Department of Emergency and Critical Care Medicine, The Second Affiliated Hospital of Nanchang University, Jiangxi, P.R. China
| | - Wei Wang
- Department of Emergency and Critical Care Medicine, The Second Affiliated Hospital of Nanchang University, Jiangxi, P.R. China
| | - Zhiyong Sheng
- Department of Emergency and Critical Care Medicine, The Second Affiliated Hospital of Nanchang University, Jiangxi, P.R. China
| | - Qingyan Meng
- Department of Burns, The Northern Hospital, Liaoning, P.R. China
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The effect of 17β-estradiol on cutaneous wound healing in protein-malnourished ovariectomized female mouse model. PLoS One 2014; 9:e115564. [PMID: 25518000 PMCID: PMC4269450 DOI: 10.1371/journal.pone.0115564] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2014] [Accepted: 11/25/2014] [Indexed: 01/09/2023] Open
Abstract
Cutaneous wound healing is delayed by protein malnutrition (PM). On the other hand, estrogen promotes cutaneous wound healing by its anti-inflammatory and cell proliferation effects. Therefore, we hypothesized that estrogen administration in protein-malnourished ovariectomized (OVX) female mice might improve the inflammatory response and promote cutaneous wound healing as well as normal nutrition. To test this hypothesis, we used full-thickness excisional wounds in Control SHAM, PM SHAM, PM OVX and PM OVX+17β-estradiol mice. The Control diet included 200 g/kg protein and the PM diet included 30 g/kg protein. The ratio of wound area in the Control SHAM group was significantly smaller than those in the three PM groups. In addition, microscopic findings also showed that the ratio of collagen fibers, the ratio of myofibroblasts and the number of new blood vessels in the Control SHAM group were significantly greater than those in the three PM groups. However, the number of Ym1-positive cells as an anti-inflammatory M2-like macrophage marker in the PM OVX+17β-estradiol group was significantly higher than those in the other three groups. These results indicate that the appearance of anti-inflammatory M2-like macrophages was promoted by estrogen administration; however, it could not promote cutaneous wound healing upon a low-protein diet. Therefore, it may be confirmed that nutrition is more important for promoting cutaneous wound healing than estrogen administration.
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Palmieri EM, Spera I, Menga A, Infantino V, Iacobazzi V, Castegna A. Glutamine synthetase desensitizes differentiated adipocytes to proinflammatory stimuli by raising intracellular glutamine levels. FEBS Lett 2014; 588:4807-14. [PMID: 25451225 DOI: 10.1016/j.febslet.2014.11.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 10/09/2014] [Accepted: 11/11/2014] [Indexed: 01/16/2023]
Abstract
The role of glutamine synthetase (GS) during adipocyte differentiation is unclear. Here, we assess the impact of GS on the adipocytic response to a proinflammatory challenge at different differentiation stages. GS expression at the late stages of differentiation desensitized mature adipocytes to bacterial lipopolysaccharide (LPS) by increasing intracellular glutamine levels. Furthermore, LPS-activated mature adipocytes were unable to produce inflammatory mediators; LPS sensitivity was rescued following GS inhibition and the associated drop in intracellular glutamine levels. The ability of adipocytes to differentially respond to LPS during differentiation negatively correlates to GS expression and intracellular glutamine levels. Hence, modulation of intracellular glutamine levels by GS expression represents an endogenous mechanism through which mature adipocytes control the inflammatory response.
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Affiliation(s)
- Erika Mariana Palmieri
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Bari, Italy
| | - Iolanda Spera
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Bari, Italy
| | - Alessio Menga
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Bari, Italy
| | | | - Vito Iacobazzi
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Bari, Italy; CNR Institute of Biomembranes and Bioenergetics, Bari, Italy
| | - Alessandra Castegna
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Bari, Italy.
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de Oliveira DC, Hastreiter AA, Mello AS, de Oliveira Beltran JS, Oliveira Santos EWC, Borelli P, Fock RA. The effects of protein malnutrition on the TNF-RI and NF-κB expression via the TNF-α signaling pathway. Cytokine 2014; 69:218-25. [DOI: 10.1016/j.cyto.2014.06.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Revised: 04/09/2014] [Accepted: 06/04/2014] [Indexed: 11/25/2022]
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Şimşek T, Şimşek HU, Cantürk NZ. Response to trauma and metabolic changes: posttraumatic metabolism. ULUSAL CERRAHI DERGISI 2014; 30:153-9. [PMID: 25931917 DOI: 10.5152/ucd.2014.2653] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Accepted: 03/03/2014] [Indexed: 11/22/2022]
Abstract
Stress response caused by events such as surgical trauma includes endocrine, metabolic and immunological changes. Stress hormones and cytokines play a role in these reactions. More reactions are induced by greater stress, ultimately leading to greater catabolic effects. Cuthbertson reported the characteristic response that occurs in trauma patients: protein and fat consumption and protection of body fluids and electrolytes because of hypermetabolism in the early period. The oxygen and energy requirement increases in proportion to the severity of trauma. The awareness of alterations in amino acid, lipid, and carbohydrate metabolism changes in surgical patients is important in determining metabolic and nutritional support. The main metabolic change in response to injury that leads to a series of reactions is the reduction of the normal anabolic effect of insulin, i.e. the development of insulin resistance. Free fatty acids are primary sources of energy after trauma. Triglycerides meet 50 to 80 % of the consumed energy after trauma and in critical illness. Surgical stress and trauma result in a reduction in protein synthesis and moderate protein degradation. Severe trauma, burns and sepsis result in increased protein degradation. The aim of glucose administration to surgical patients during fasting is to reduce proteolysis and to prevent loss of muscle mass. In major stress such as sepsis and trauma, it is important both to reduce the catabolic response that is the key to faster healing after surgery and to obtain a balanced metabolism in the shortest possible time with minimum loss. For these reasons, the details of metabolic response to trauma should be known in managing these situations and patients should be treated accordingly.
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Affiliation(s)
- Turgay Şimşek
- Clinic of General Surgery, Sakarya Toyotasa Emergency Service Hospital, Sakarya, Turkey
| | - Hayal Uzelli Şimşek
- Department of Obstetrics and Gynaecology Sakarya University Training and Research Hospital, Sakarya, Turkey
| | - Nuh Zafer Cantürk
- Department of General Surgery, Kocaeli University Faculty of Medicine, Kocaeli, Turkey
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Intravenous Glutamine Administration Reduces Lung and Distal Organ Injury in Malnourished Rats With Sepsis. Shock 2014; 41:222-32. [DOI: 10.1097/shk.0000000000000102] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Cruzat VF, Bittencourt A, Scomazzon SP, Leite JSM, de Bittencourt PIH, Tirapegui J. Oral free and dipeptide forms of glutamine supplementation attenuate oxidative stress and inflammation induced by endotoxemia. Nutrition 2013; 30:602-11. [PMID: 24698353 DOI: 10.1016/j.nut.2013.10.019] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Revised: 09/12/2013] [Accepted: 10/24/2013] [Indexed: 12/18/2022]
Abstract
OBJECTIVE The aim of the present study was to determine the effects of oral supplementation with L-glutamine plus L-alanine (GLN+ALA), both in the free form and L-alanyl-L-glutamine dipeptide (DIP) in endotoxemic mice. METHODS B6.129 F2/J mice were subjected to endotoxemia (Escherichia coli lipopolysaccharide [LPS], 5 mg/kg, LPS group) and orally supplemented for 48 h with either L-glutamine (1 g/kg) plus L-alanine (0.61 g/kg) (GLN+ALA-LPS group) or 1.49 g/kg DIP (DIP-LPS group). Plasma glutamine, cytokines, and lymphocyte proliferation were measured. Liver and skeletal muscle glutamine, glutathione (GSH), oxidized GSH (GSSG), tissue lipoperoxidation (TBARS), and nuclear factor (NF)-κB-interleukin-1 receptor-associated kinase 1 (IRAK1)-Myeloid differentiation primary response gene 88 pathway also were determined. RESULTS Endotoxemia depleted plasma (by 71%), muscle (by 44%), and liver (by 49%) glutamine concentrations (relative to the control group), which were restored in both GLN+ALA-LPS and DIP-LPS groups (P < 0.05). Supplemented groups reestablished GSH content, intracellular redox status (GSSG/GSH ratio), and TBARS concentration in muscle and liver (P < 0.05). T- and B-lymphocyte proliferation increased in supplemented groups compared with controls and LPS group (P < 0.05). Tumor necrosis factor-α, interleukin (IL)-6, IL-1 β, and IL-10 increased in LPS group but were attenuated by the supplements (P < 0.05). Endotoxemic mice exhibited higher muscle gene expression of components of the NF-κB pathway, with the phosphorylation of IκB kinase-α/β. These returned to basal levels (relative to the control group) in both GLN+ALA-LPS and DIP-LPS groups (P < 0.05). Higher mRNA of IRAK1 and MyD88 were observed in muscle of LPS group compared with the control and supplemented groups (P < 0.05). CONCLUSION Oral supplementations with GLN+ALA or DIP are effective in attenuating oxidative stress and the proinflammatory responses induced by endotoxemia in mice.
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Affiliation(s)
- Vinicius Fernandes Cruzat
- Department of Food Science and Experimental Nutrition, Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil; School of Biomedical Sciences, CHIRI Biosciences Research Precinct, Faculty of Health Sciences, Curtin University, Perth, Western Australia.
| | - Aline Bittencourt
- Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Rua Sarmento Leite, Porto Alegre, Brazil
| | - Sofia Pizzato Scomazzon
- Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Rua Sarmento Leite, Porto Alegre, Brazil
| | - Jaqueline Santos Moreira Leite
- Department of Food Science and Experimental Nutrition, Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | - Paulo Ivo Homem de Bittencourt
- Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Rua Sarmento Leite, Porto Alegre, Brazil
| | - Julio Tirapegui
- Department of Food Science and Experimental Nutrition, Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
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