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Food and Gut Microbiota-Derived Metabolites in Nonalcoholic Fatty Liver Disease. Foods 2022; 11:foods11172703. [PMID: 36076888 PMCID: PMC9455821 DOI: 10.3390/foods11172703] [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: 07/20/2022] [Revised: 08/19/2022] [Accepted: 08/31/2022] [Indexed: 11/30/2022] Open
Abstract
Diet and lifestyle are crucial factors that influence the susceptibility of humans to nonalcoholic fatty liver disease (NAFLD). Personalized diet patterns chronically affect the composition and activity of microbiota in the human gut; consequently, nutrition-related dysbiosis exacerbates NAFLD via the gut–liver axis. Recent advances in diagnostic technology for gut microbes and microbiota-derived metabolites have led to advances in the diagnosis, treatment, and prognosis of NAFLD. Microbiota-derived metabolites, including tryptophan, short-chain fatty acid, fat, fructose, or bile acid, regulate the pathophysiology of NAFLD. The microbiota metabolize nutrients, and metabolites are closely related to the development of NAFLD. In this review, we discuss the influence of nutrients, gut microbes, their corresponding metabolites, and metabolism in the pathogenesis of NAFLD.
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Enhanced Recovery after Abdominoplasty Using Perisurgical Nutritional Supplementation. PLASTIC AND RECONSTRUCTIVE SURGERY-GLOBAL OPEN 2020; 8:e3314. [PMID: 33425620 PMCID: PMC7787335 DOI: 10.1097/gox.0000000000003314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 10/24/2020] [Indexed: 11/26/2022]
Abstract
Nutritional supplements are common in other surgical specialties but not widely used in the plastic surgery setting. This study compares the surgical outcomes of patients using our standard ERAS protocol involving arnica and bromelain with an updated ERAS protocol using perisurgical nutritional supplementation using a staged administration of nutraceuticals. Methods In total, 300 female abdominoplasty patients were randomly provided with perioperative supplementation consisting of arnica and bromelain, or a 3-stage nutraceutical regimen containing arginine, citrulline, glutamine, bromelain, and vitamin C. Narcotic use in recovery and post-operative drainage were measured, and both groups completed a self-assessment of bruising coloration, days to independent activity, perceived pain, and documented the quantity of narcotic and non-prescription pain killers they took over a 14-day recovery period. Results There were 130 patients in the nutraceutical group and 80 in the arnica and bromelain group; patients were excluded due to non-compliance or due to incomplete data. Patients taking the nutraceutical regimen reported a shorter duration of pain and had a 41% reduction in narcotic use in recovery and experienced 48% less post-operative drainage. Home use of narcotic pain killers decreased by 25%. There also was a trend toward decreased and earlier clearing/maturation of bruising as well as return to daily activates without assistance. Patients also reported an increase in satisfaction with their surgical experience. Conclusions This study demonstrated that perioperative supplementation with nitric oxide precursors, antioxidants, and proteolytic enzymes in a staged fashion can positively affect post-operative outcomes and is an adjunct to enhanced surgical recovery protocols.
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Chen J, Zhang S, Wu J, Wu S, Xu G, Wei D. Essential Role of Nonessential Amino Acid Glutamine in Atherosclerotic Cardiovascular Disease. DNA Cell Biol 2019; 39:8-15. [PMID: 31825254 DOI: 10.1089/dna.2019.5034] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Atherosclerosis is a major disease that seriously harms human health and is known as the "number one killer" in developed countries and the leading cause of death worldwide. Glutamine is the most abundant nonessential amino acid in the human blood that has multifaceted effects on the body. Recent studies showed that glutamine is negatively corrected with the progression of atherosclerotic lesions. In this review, we focused on the relationship of glutamine with macrophage polarization, nitrification stress, oxidative stress injury, myocardial ischemia-reperfusion injury, and therapeutic angiogenesis to review its roles in atherosclerotic cardiovascular disease.
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Affiliation(s)
- Jinna Chen
- Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Hunan Province, Hunan International Scientific and Technological Cooperation Base of Arteriosclerotic Disease, Province Innovative Training Base for Medical Postgraduates, Hengyang Medical College, University of South China, Hengyang, Hunan, China
| | - Shulei Zhang
- Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Hunan Province, Hunan International Scientific and Technological Cooperation Base of Arteriosclerotic Disease, Province Innovative Training Base for Medical Postgraduates, Hengyang Medical College, University of South China, Hengyang, Hunan, China
| | - Jiaxiong Wu
- Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Hunan Province, Hunan International Scientific and Technological Cooperation Base of Arteriosclerotic Disease, Province Innovative Training Base for Medical Postgraduates, Hengyang Medical College, University of South China, Hengyang, Hunan, China
| | - Shiyuan Wu
- YueYang Maternal-Child Medicine Health Hospital Hunan, Province Innovative Training Base for Medical Postgraduates, Yueyang, Hunan, China
| | - Gaosheng Xu
- YueYang Maternal-Child Medicine Health Hospital Hunan, Province Innovative Training Base for Medical Postgraduates, Yueyang, Hunan, China
| | - Dangheng Wei
- Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Hunan Province, Hunan International Scientific and Technological Cooperation Base of Arteriosclerotic Disease, Province Innovative Training Base for Medical Postgraduates, Hengyang Medical College, University of South China, Hengyang, Hunan, China
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Nemati A, Alipanah-Moghadam R, Molazadeh L, Naghizadeh Baghi A. The Effect of Glutamine Supplementation on Oxidative Stress and Matrix Metalloproteinase 2 and 9 After Exhaustive Exercise. DRUG DESIGN DEVELOPMENT AND THERAPY 2019; 13:4215-4223. [PMID: 31849453 PMCID: PMC6912001 DOI: 10.2147/dddt.s218606] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 12/04/2019] [Indexed: 12/14/2022]
Abstract
Background Glutamine is the most abundant amino acid in plasma and skeletal muscles and an important fuel for immune system cells. It has beneficial anti-inflammatory and antioxidant properties which may be considered as a potentially useful supplement for athletes. The present study was conducted to investigate the effect of glutamine supplementation on oxidative stress and matrix metalloproteinase 2 and 9 after exhaustive exercise in young healthy males. Materials and methods In this study, 30 healthy males (supplement =15 and control=15) were randomly assigned into two groups. The supplement group received 0.3 g/kg BW of glutamine along with 25 gr of sugar dissolved in 250 cc water per day. The control group received 25 gr of sugar in 250 cc water per day. Fasting blood samples were taken at baseline and at the end of 14 days of intervention. The participants underwent exercise until experiencing full-body exhaustive fatigue for 16 ± 2.84 mins, and then fasting blood samples were taken. Serum levels of TAC, MDA, MMP2, MMP9, glutathione, and hs-CRP were measured. Results Serum levels of MDA and hs-CRP significantly decreased in the supplement group (p< 0.05). The serum level of TAC significantly increased in the supplement group (p< 0.05). Glutathione serum levels significantly increased after exhaustive exercise (p< 0.05). Serum levels of MMP2 and MMP9 remained unchanged. Conclusion Results of this study showed that, some biochemical factors are time-dependent and can increase or decrease over time, as well as, serum levels of hs-CRP and MDA decreased with glutamine supplementation along with the increase in the TAC serum levels, but this supplementation had no effect on serum levels of MMP2 and MMP9 in exhaustive exercise.
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Affiliation(s)
- Ali Nemati
- Ardabil University of Medical Sciences, School of Medicine, Department of Clinical Biochemistry, Ardabil, Iran
| | - Reza Alipanah-Moghadam
- Ardabil University of Medical Sciences, School of Medicine, Department of Clinical Biochemistry, Ardabil, Iran
| | - Leila Molazadeh
- Ardabil University of Medical Sciences, School of Medicine, Department of Clinical Biochemistry, Ardabil, Iran
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Brinkmann SJH, Buijs N, Vermeulen MAR, Oosterink E, Schierbeek H, Beishuizen A, de Vries JPPM, Wisselink W, van Leeuwen PAM. Perioperative glutamine supplementation restores disturbed renal arginine synthesis after open aortic surgery: a randomized controlled clinical trial. Am J Physiol Renal Physiol 2016; 311:F567-75. [PMID: 27194717 DOI: 10.1152/ajprenal.00340.2015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Accepted: 05/11/2016] [Indexed: 01/27/2023] Open
Abstract
Postoperative renal failure is a common complication after open repair of an abdominal aortic aneurysm. The amino acid arginine is formed in the kidneys from its precursor citrulline, and citrulline is formed from glutamine in the intestines. Arginine enhances the function of the immune and cardiovascular systems, which is important for recovery after surgery. We hypothesized that renal arginine production is diminished after ischemia-reperfusion injury caused by clamping of the aorta during open abdominal aortic surgery and that parenteral glutamine supplementation might compensate for this impaired arginine synthesis. This open-label clinical trial randomized patients who underwent clamping of the aorta during open abdominal aortic surgery to receive a perioperative supplement of intravenous alanyl-glutamine (0.5 g·kg(-1)·day(-1); group A, n = 5) or no supplement (group B, n = 5). One day after surgery, stable isotopes and tracer methods were used to analyze the metabolism and conversion of glutamine, citrulline, and arginine. Whole body plasma flux of glutamine, citrulline, and arginine was significantly higher in group A than in group B (glutamine: 391 ± 34 vs. 258 ± 19 μmol·kg(-1)·h(-1), citrulline: 5.7 ± 0.4 vs. 2.8 ± 0.4 μmol·kg(-1)·h(-1), and arginine: 50 ± 4 vs. 26 ± 2 μmol·kg(-1)·h(-1), P < 0.01), as was the synthesis of citrulline from glutamine (4.8 ± 0.7 vs. 1.6 ± 0.3 μmol·kg(-1)·h(-1)), citrulline from arginine (2.3 ± 0.3 vs. 0.96 ± 0.1 μmol·kg(-1)·h(-1)), and arginine from glutamine (7.7 ± 0.4 vs. 2.8 ± 0.2 μmol·kg(-1)·h(-1)), respectively (P < 0.001 for all). In conclusion, the production of citrulline and arginine is severely reduced after clamping during aortic surgery. This study shows that an intravenous supplement of glutamine increases the production of citrulline and arginine and compensates for the inhibitory effect of ischemia-reperfusion injury.
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Affiliation(s)
- Saskia J H Brinkmann
- Department of Surgery, VU University Medical Center, Amsterdam, The Netherlands;
| | - Nikki Buijs
- Department of Surgery, VU University Medical Center, Amsterdam, The Netherlands
| | - Mechteld A R Vermeulen
- Department of Internal Medicine, VU University Medical Center, Amsterdam, The Netherlands
| | - Efraim Oosterink
- Department of Pediatrics, Academic Medical Center, Emma Children's Hospital, Amsterdam, The Netherlands; and
| | - Henk Schierbeek
- Department of Pediatrics, Academic Medical Center, Emma Children's Hospital, Amsterdam, The Netherlands; and
| | - Albertus Beishuizen
- Department of Intensive Care, VU University Medical Center, Amsterdam, The Netherlands; Department of Surgery, Medical Centre Alkmaar, Trial Center Holland Health, Alkmaar, The Netherlands; Department of Intensive Care, Medisch Spectrum Twente, Enschede, The Netherlands
| | | | - Willem Wisselink
- Department of Surgery, VU University Medical Center, Amsterdam, The Netherlands
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Vasques ER, Cunha JEM, Coelho AMM, Sampietre SN, Patzina RA, Abdo EE, Nader HB, Tersariol ILS, Lima MA, Godoy CMG, Rodrigues T, Chaib E, D’Albuquerque LAC. Trisulfate Disaccharide Decreases Calcium Overload and Protects Liver Injury Secondary to Liver Ischemia/Reperfusion. PLoS One 2016; 11:e0149630. [PMID: 26901764 PMCID: PMC4763191 DOI: 10.1371/journal.pone.0149630] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 02/03/2016] [Indexed: 12/14/2022] Open
Abstract
Background Ischemia and reperfusion (I/R) causes tissue damage and intracellular calcium levels are a factor of cell death. Sodium calcium exchanger (NCX) regulates calcium extrusion and Trisulfated Disaccharide (TD) acts on NCX decreasing intracellular calcium through the inhibition of the exchange inhibitory peptide (XIP). Objectives The aims of this research are to evaluate TD effects in liver injury secondary to I/R in animals and in vitro action on cytosolic calcium of hepatocytes cultures under calcium overload. Methods Wistar rats submitted to partial liver ischemia were divided in groups: Control: (n = 10): surgical manipulation with no liver ischemia; Saline: (n = 15): rats receiving IV saline before reperfusion; and TD: (n = 15): rats receiving IV TD before reperfusion. Four hours after reperfusion, serum levels of AST, ALT, TNF-α, IL-6, and IL-10 were measured. Liver tissue samples were collected for mitochondrial function and malondialdehyde (MDA) content. Pulmonary vascular permeability and histologic parameters of liver were determined. TD effect on cytosolic calcium was evaluated in BRL3A hepatic rat cell cultures stimulated by thapsigargin pre and after treatment with TD. Results AST, ALT, cytokines, liver MDA, mitochondrial dysfunction and hepatic histologic injury scores were less in TD group when compared to Saline Group (p<0.05) with no differences in pulmonary vascular permeability. In culture cells, TD diminished the intracellular calcium raise and prevented the calcium increase pre and after treatment with thapsigargin, respectively. Conclusion TD decreases liver cell damage, preserves mitochondrial function and increases hepatic tolerance to I/R injury by calcium extrusion in Ca2+ overload situations.
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Affiliation(s)
- Enio Rodrigues Vasques
- Department of Gastroenterology (LIM 37), Medical School, University of Sao Paulo (USP), Sao Paulo, Brazil
- * E-mail:
| | | | - Ana Maria Mendonca Coelho
- Department of Gastroenterology (LIM 37), Medical School, University of Sao Paulo (USP), Sao Paulo, Brazil
| | - Sandra N. Sampietre
- Department of Gastroenterology (LIM 37), Medical School, University of Sao Paulo (USP), Sao Paulo, Brazil
| | - Rosely Antunes Patzina
- Department of Gastroenterology (LIM 37), Medical School, University of Sao Paulo (USP), Sao Paulo, Brazil
| | - Emilio Elias Abdo
- Department of Gastroenterology (LIM 37), Medical School, University of Sao Paulo (USP), Sao Paulo, Brazil
| | - Helena B. Nader
- Department of Biochemistry, Federal University of Sao Paulo (UNIFESP), Sao Paulo, Brazil
| | - Ivarne L. S. Tersariol
- Department of Biochemistry, Federal University of Sao Paulo (UNIFESP), Sao Paulo, Brazil
| | - Marcelo Andrade Lima
- Department of Biochemistry, Federal University of Sao Paulo (UNIFESP), Sao Paulo, Brazil
| | - Carlos M. G. Godoy
- Department of Science and Technology, Federal University of Sao Paulo (UNIFESP), Sao Paulo, Brazil
| | - Tiago Rodrigues
- Center of Natural and Human Sciences, Federal University of ABC, Sao Paulo, Brazil
| | - Eleazar Chaib
- Department of Gastroenterology (LIM 37), Medical School, University of Sao Paulo (USP), Sao Paulo, Brazil
| | - Luiz A. C. D’Albuquerque
- Department of Gastroenterology (LIM 37), Medical School, University of Sao Paulo (USP), Sao Paulo, Brazil
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Gündüz E, Ülger BV, İbiloğlu İ, Ekinci A, Dursun R, Zengin Y, İçer M, Uslukaya Ö, Ekinci C, Güloğlu C. Glutamine provides effective protection against deltamethrin-induced acute hepatotoxicity in rats but not against nephrotoxicity. Med Sci Monit 2015; 21:1107-14. [PMID: 25890620 PMCID: PMC4413811 DOI: 10.12659/msm.893180] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Background The aim of this study was to investigate the protective effects of L-glutamine (GLN) against liver and kidney injury caused by acute toxicity of deltamethrin (DLM). Material/Methods Thirty-two rats were indiscriminately separated into 4 groups with 8 rats each: control group (distilled water; 10 ml/kg, perorally [p.o.]), DLM group (35 mg/kg p.o. one dose.), GLN group (1.5 gr/kg, p.o. single dose.) and DLM (35 mg/kg p.o. one dose.) + GLN group (1.5 gr/kg, p.o. one dose after 4 hours.). Testing for total antioxidant status (TAS), total oxidant status (TOS), interleukin-1 beta (IL-1β), tumor necrosis factor-alpha (TNF-α), and interleukin-6 (IL-6) analyses were performed on tissue samples, and alanine aminotransferase (ALT), aspartate aminotransferase (AST), lactate dehydrogenase (LDH), urea, and creatinine were analyzed on serum samples. Liver and kidney samples were histopathologically analyzed. Results The TOS level in liver was significantly higher in the DLM group than in the control group, and the level in DLM+GLN group was considerably lower than in the DLM group. The TAS level in the DLM+GLN group was considerably higher than in the control and DLM groups. The TAS level in kidney tissues was considerably lower in the DLM group than in controls, but was similar to other groups. Histopathological analyses of liver tissues established a significant difference between DLM and DLM+GLN groups in terms of grade 2 hepatic injury. However, no significant difference was found between DLM and DLM+GLN groups in terms of kidney injury. Conclusions Glutamine leads to significant improvement in deltamethrin-induced acute hepatotoxicity in terms of histopathologic results, tissue oxidative stress parameters, and serum liver function marker enzymes.
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Affiliation(s)
- Ercan Gündüz
- Department of Emergency Medicine, Faculty of Medicine, Dicle University, Diyarbakır, Turkey
| | - Burak Veli Ülger
- Department of General Surgery, Faculty of Medicine, Dicle University, Diyarbakır, Turkey
| | - İbrahim İbiloğlu
- Department of Pathology, Faculty of Medicine, Dicle University, Diyarbakır, Turkey
| | - Aysun Ekinci
- Department of Biochemistry, Faculty of Medicine, Dicle University, Diyarbakır, Turkey
| | - Recep Dursun
- Department of Emergency Medicine, Faculty of Medicine, Dicle University, Diyarbakır, Turkey
| | - Yılmaz Zengin
- Department of Emergency Medicine, Faculty of Medicine, Dicle University, Diyarbakır, Turkey
| | - Mustafa İçer
- Department of Emergency Medicine, Faculty of Medicine, Dicle University, Diyarbakır, Turkey
| | - Ömer Uslukaya
- Department of General Surgery, Faculty of Medicine, Dicle University, Diyarbakır, Turkey
| | - Cenap Ekinci
- Department of Histology, Faculty of Medicine, Dicle University, Diyarbakır, Turkey
| | - Cahfer Güloğlu
- Department of Emergency Medicine, Faculty of Medicine, Dicle University, Diyarbakır, Turkey
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Xu F, Dai CL, Peng SL, Zhao Y, Jia CJ, Xu YQ. Preconditioning with glutamine protects against ischemia/reperfusion-induced hepatic injury in rats with obstructive jaundice. Pharmacology 2014; 93:155-65. [PMID: 24801881 DOI: 10.1159/000360181] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Accepted: 01/31/2014] [Indexed: 12/16/2022]
Abstract
OBJECTIVE To ascertain whether glutamine (Gln) pretreatment protects rats with obstructive jaundice from hepatic ischemia/reperfusion (I/R) injury and to determine the underlying molecular mechanisms. METHODS An obstructive jaundice rat model was developed by bile duct ligation. On the first day after the operation, all rats were randomized into two groups and received oral Gln or normal saline (NS) daily for 7 days. Then both groups underwent a 15-min liver ischemia via the Pringle maneuver. Blood samples as well as liver and intestinal tissues were harvested and measured after 1, 6 and 24 h of reperfusion. RESULTS The results showed that the histological morphology of the liver and intestinal tissues significantly improved in the Gln group after I/R injury compared with the NS group. Serum proteins and enzymes associated with hepatic function also significantly improved in the Gln group. The level of glutathione increased and the levels of malondialdehyde and myeloperoxidase decreased in the Gln group. The levels of interleukin-1β and tumor necrosis factor-α decreased in the Gln group. Moreover, bcl-2 protein expression was upregulated and intercellular adhesion molecule 1 and bax protein expression downregulated in the Gln group; the caspase 3 mRNA level significantly increased in the Gln group. CONCLUSIONS The study demonstrates that preconditioning with Gln significantly improves hepatic structure and function after I/R injury in rats with obstructive jaundice. The protective effect of Gln was mediated by the inhibition of reactive oxygen species and inflammation as well as a reduction in hepatocyte apoptosis.
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Affiliation(s)
- Feng Xu
- Department of Hepatobiliary and Splenic Surgery, Shengjing Hospital, China Medical University, Shenyang, China
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Lin Z, Cai F, Lin N, Ye J, Zheng Q, Ding G. Effects of glutamine on oxidative stress and nuclear factor-κB expression in the livers of rats with nonalcoholic fatty liver disease. Exp Ther Med 2013; 7:365-370. [PMID: 24396406 PMCID: PMC3881322 DOI: 10.3892/etm.2013.1434] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Accepted: 10/18/2013] [Indexed: 12/22/2022] Open
Abstract
The aim of this study was to investigate the effects of glutamine on the histomorphology of the liver, oxidative stress and nuclear factor-κB (NF-κB) expression in the development of nonalcoholic fatty liver disease (NAFLD). NAFLD was induced in rats by a high-fat diet, and rats in the treatment group were subjected to oral administration of glutamine (1 g/kg/day). Rats from the treatment, model and normal control groups were assessed after 8 and 12 weeks (n=6 per group at each time-point). The levels of glutathione (GSH), malondialdehyde (MDA) and tumor necrosis factor-α (TNF-α) in the liver, and the liver histopathology and NF-κB protein 65 (p65) expression in the liver were assessed. Compared with the control group under the same experimental period, the MDA and TNF-α levels in the liver, the hepatic steatosis and the hepatic expression of NF-κB p65 were significantly higher in the model and the treatment groups (P<0.05), while the GSH levels in the liver were significantly lower (P<0.05). These indices improved significantly in the treatment group compared with the model group (P<0.05). In conclusion, glutamine reduces the degree of oxidative stress in the liver, inhibits NF-κB p65 expression and improves hepatic steatosis. Glutamine has a certain protective effect in NAFLD.
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Affiliation(s)
- Zhihui Lin
- Department of Gastroenterology, Fujian Provincial Hospital, Fujian Medical University, Fuzhou, Fujian 350001, P.R. China
| | - Fangfang Cai
- Department of Gastroenterology, Fujian Provincial Hospital, Fujian Medical University, Fuzhou, Fujian 350001, P.R. China
| | - Ning Lin
- Department of Ultrasound, Fujian Provincial Hospital, Fujian Medical University, Fuzhou, Fujian 350001, P.R. China
| | - Jinli Ye
- Department of Gastroenterology, Fujian Provincial Hospital, Fujian Medical University, Fuzhou, Fujian 350001, P.R. China
| | - Qiqi Zheng
- Department of Gastroenterology, Fujian Provincial Hospital, Fujian Medical University, Fuzhou, Fujian 350001, P.R. China
| | - Guisheng Ding
- Department of Ultrasound, Fujian Provincial Hospital, Fujian Medical University, Fuzhou, Fujian 350001, P.R. China
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Zhang SC, Shi Q, Feng YN, Fang J. Tissue-Protective Effect of Glutamine on Hepatic Ischemia-Reperfusion Injury via Induction of Heme Oxygenase-1. Pharmacology 2013; 91:59-68. [DOI: 10.1159/000343809] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Accepted: 09/27/2012] [Indexed: 12/30/2022]
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Pires VLDS, Souza JRFD, Guimarães SB, Silva Filho ARD, Garcia JHP, Vasconcelos PRLD. Preconditioning with L-alanyl-L-glutamine in a Mongolian Gerbil model of acute cerebral ischemia/reperfusion injury. Acta Cir Bras 2011; 26 Suppl 1:14-20. [DOI: 10.1590/s0102-86502011000700004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
PURPOSE: To investigate the effect of L-alanyl-L-glutamine (L-Ala-Gln) preconditioning in an acute cerebral ischemia/reperfusion (I/R) model in gerbils. METHODS: Thirty-six Mongolian gerbils (Meriones unguiculatus), (60-100g), were randomized in 2 groups (n=18) and preconditioned with saline 2.0 ml (Group-S) or 0.75g/Kg of L-Ala-Gln, (Group-G) administered into the femoral vein 30 minutes prior to I/R. Each group was divided into three subgroups (n=6). Anesthetized animals (urethane, 1.5g/Kg, i.p.) were submitted to bilateral occlusion of common carotid arteries during 15 minutes. Samples (brain tissue and arterial blood) were collected at the end of ischemia (T0) and after 30 (T30) and 60 minutes (T60) for glucose, lactate, myeloperoxidase (MPO), thiobarbituric acid reactive substances (TBARS), glutathione (GSH) assays and histopathological evaluation. RESULTS: Glucose and lactate levels were not different in studied groups. However glycemia increased significantly in saline groups at the end of the reperfusion period. TBARS levels were significantly different, comparing treated (Group-G) and control group after 30 minutes of reperfusion (p<0.05) in cerebral tissue. Pretreatment with L-Ala-Gln promoted a significant increase in cerebral GSH contents in Group-G at T30 (p<0.001) time-point compared with Group-S. At T30 and T60, increased levels of GSH occurred in both time-points. There were no group differences regarding MPO levels. Pyknosis, presence of red neurons and intracellular edema were significantly smaller in Group-G. CONCLUSION: Preconditioning with L-Ala-Gln in gerbils submitted to cerebral ischemia/reperfusion reduces oxidative stress and degeneration of the nucleus (pyknosis) and cell death (red neurons) in the cerebral tissue.
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Araújo Júnior RJC, Silva Júnior RGD, Vasconcelos MPPD, Guimarães SB, Vasconcelos PRLD, Garcia JHP. Preconditioning with L-alanyl-glutamine reduces hepatic ischemia-reperfusion injury in rats. Acta Cir Bras 2011; 26 Suppl 1:8-13. [DOI: 10.1590/s0102-86502011000700003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
PURPOSE: To evaluate the effects of pre-conditioning with L-alanyl- glutamine (L-Ala-Gln) in rats subjected to total hepatic ischemia. METHODS: Thirty Wistar rats, average weight 300g, were randomly assigned to 3 groups (n=10): G-1 - Saline, G-2- L-Ala-Gln, G-3-control (Sham). G-1 and G-3 groups were treated with saline 2.0 ml or L-Ala-Gln (0.75mg/Kg) intraperitoneally (ip) respectively, 2 hours before laparotomy. Anesthetized rats were subjected to laparotomy and total hepatic ischemia (30 minutes) induced by by clamping of portal triad. Control group underwent peritoneal puncture, two hours before the sham operation (laparotomy only). At the end of ischemia (G1 and G2), the liver was reperfused for 60 minutes. Following reperfusion blood samples were collected for evaluation of alanine aminotransferase (ALT) and lactate dehydrogenase (LDH) levels. Liver (medium lobe) was removed for immunohistochemistry study with antibody for Caspase-3. RESULTS: It was found a significant decrease (p<0.05) of ALT levels (270.6 +40.8 vs 83.3 +5.5 - p <0.05), LDH (2079.0 +262.4 vs. 206.6 +16.2 - p <0.05) and Caspase-3 expression (6.72 +1.35 vs. 2.19 +1.14, p <0.05) in rats subjected to I / R, comparing the group treated with L-Ala -Gln with G-2. Also, the ALT level was significantly lower (P<0.05) in G-1 and G-2 groups than in G-3 (control group). CONCLUSION: L-Ala-Gln preconditioning in rats submitted to hepatic I/R significantly reduces ALT, LDH and Caspase-3 expression, suggesting hepatic protection.
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