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Chiu YW, Lee CH, Lo HC. Oral post-treatment supplementation with a combination of glutamine, citrulline, and antioxidant vitamins additively mitigates jejunal damage, oxidative stress, and inflammation in rats with intestinal ischemia and reperfusion. PLoS One 2024; 19:e0298334. [PMID: 38306371 PMCID: PMC10836685 DOI: 10.1371/journal.pone.0298334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 01/18/2024] [Indexed: 02/04/2024] Open
Abstract
INTRODUCTION Intestinal ischemia and reperfusion (IIR) injury is closely associated with oxidative stress. Evidence shows that oral supplementation with glutamine and citrulline alleviates IIR-induced jejunal damage. We investigated the effects of a combination of glutamine, citrulline, and antioxidant vitamins on IIR-induced jejunal damage, oxidative stress, and inflammation. METHOD Male Wistar rats that underwent 60 min of superior mesenteric artery occlusion were orally administered glutamine plus citrulline (GC), vitamin C plus E (CE), or a combination of GC and CE 15 min before and 3, 9, and 21 h after reperfusion. Healthy rats without IIR were used as controls. RESULTS After reperfusion for 24 h, rats with IIR showed lower levels of red blood cells, hemoglobin, serum glucose, and jejunal DNA and increased white blood cell counts compared to controls (1-way ANOVA with the least significant difference, P < 0.05). The IIR-induced decrease in serum albumin and increase in plasma interleukin-6 and jejunal thiobarbituric acid-reactive substances (TBARS) were significantly reversed by GC and/or CE. The results of the 2-way ANOVA indicated that GC was the main factor that increased jejunal villus height and muscularis DNA, and CE was the main factor that increased jejunal muscularis protein and decreased jejunal proinflammatory cytokine levels and myeloperoxidase activity. In addition, GC and CE are the main factors that decrease plasma proinflammatory cytokine levels and the jejunal apoptotic index. CONCLUSION Oral post-treatment supplementation with glutamine and citrulline, combined with vitamins C and E, may alleviate IIR-induced oxidative stress, inflammation, and jejunal damage.
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Affiliation(s)
- Yu-Wen Chiu
- Department of Nutritional Science, Fu Jen Catholic University, New Taipei City, Taiwan
- Lee’s Endocrinology Clinic, Pingtung City, Pingtung County, Taiwan
| | - Chien-Hsing Lee
- School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan
- Department of Surgery, Division of Pediatric Surgery, China Medical University Children’s Hospital, Taichung, Taiwan
| | - Hui-Chen Lo
- Department of Nutritional Science, Fu Jen Catholic University, New Taipei City, Taiwan
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Kvidera SK, Mayorga EJ, McCarthy CS, Horst EA, Abeyta MA, Baumgard LH. Effects of supplemental citrulline on thermal and intestinal morphology parameters during heat stress and feed restriction in growing pigs. J Anim Sci 2024; 102:skae120. [PMID: 38812469 PMCID: PMC11143481 DOI: 10.1093/jas/skae120] [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: 12/05/2023] [Accepted: 05/29/2024] [Indexed: 05/31/2024] Open
Abstract
Study objectives were to characterize the effects of citrulline (CIT) on physiological and intestinal morphology metrics during heat stress (HS) and feed restriction. Forty crossbred gilts (30 ± 2 kg body weight [BW]) were assigned to one of five treatments: (1) thermoneutral (TN) fed ad libitum (AL) with control (CON) supplement (TNAL; n = 8), (2) TN pair-fed (PF) with CON (PF-CON; n = 8), (3) TN PF with CIT (PF-CIT; n = 8), (4) HS AL with CON (HS-CON; n = 8), and (5) HS AL with CIT (HS-CIT; n = 8). During the period (P) 1 (7 d), pigs were in TN conditions (23.6 °C) and fed AL their respective supplemental treatments. During P2 (2.5 d), HS-CON and HS-CIT pigs were fed AL and exposed to cyclical HS (33.6 to 38.3 °C), while TNAL, PF-CON, and PF-CIT remained in TN and were fed either AL or PF to their HS counterparts. Citrulline (0.13 g/kg BW) was orally administered twice daily during P1 and P2. HS increased rectal temperature (Tr), skin temperature (Ts), and respiration rate (RR) relative to TN pigs (0.8 °C, 4.7 °C, and 47 breaths/min, respectively; P < 0.01). However, HS-CIT had decreased RR (7 breaths/min, P = 0.04) and a tendency for decreased Tr (0.1 °C, P = 0.07) relative to HS-CON pigs. During P2, HS pigs had decreased feed intake (22%; P < 0.01) and a tendency for decreased average daily gain (P = 0.08) relative to TNAL pigs, and by experimental design, PF pigs followed this same pattern. Circulating lipopolysaccharide-binding protein tended to be decreased (29%; P = 0.08) in PF relative to TNAL pigs and was increased (41%; P = 0.03) in HS compared to PF pigs. Jejunum villus height was decreased in PF relative to TNAL pigs (15%; P = 0.03); however, CIT supplementation improved this metric during feed restriction (16%; P = 0.10). Jejunum mucosal surface area decreased in PF (16%; P = 0.02) and tended to decrease in HS (11%; P = 0.10) compared to TNAL pigs. Ileum villus height and mucosal surface area decreased in HS compared to TNAL pigs (10 and 14%, respectively; P ≤ 0.04), but both parameters were rescued by CIT supplementation (P ≤ 0.08). Intestinal myeloperoxidase and goblet cell area remained similar among treatments and intestinal segments (P > 0.24). In summary, CIT supplementation slightly improved RR and Tr during HS. Feed restriction and HS differentially affected jejunum and ileum morphology and while CIT ameliorated some of these effects, the benefit appeared dependent on intestinal section and stressor type.
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Affiliation(s)
- Sara K Kvidera
- Department of Animal Science, Iowa State University, Ames, Iowa 50011, USA
| | - Edith J Mayorga
- Department of Animal Science, Iowa State University, Ames, Iowa 50011, USA
| | - Carrie S McCarthy
- Department of Animal Science, Iowa State University, Ames, Iowa 50011, USA
| | - Erin A Horst
- Department of Animal Science, Iowa State University, Ames, Iowa 50011, USA
| | - Megan A Abeyta
- Department of Animal Science, Iowa State University, Ames, Iowa 50011, USA
| | - Lance H Baumgard
- Department of Animal Science, Iowa State University, Ames, Iowa 50011, USA
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da Silva ACR, Yadegari A, Tzaneva V, Vasanthan T, Laketic K, Shearer J, Bainbridge SA, Harris C, Adamo KB. Metabolomics to Understand Alterations Induced by Physical Activity during Pregnancy. Metabolites 2023; 13:1178. [PMID: 38132860 PMCID: PMC10745110 DOI: 10.3390/metabo13121178] [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: 10/30/2023] [Revised: 11/20/2023] [Accepted: 11/27/2023] [Indexed: 12/23/2023] Open
Abstract
Physical activity (PA) and exercise have been associated with a reduced risk of cancer, obesity, and diabetes. In the context of pregnancy, maintaining an active lifestyle has been shown to decrease gestational weight gain (GWG) and lower the risk of gestational diabetes mellitus (GDM), hypertension, and macrosomia in offspring. The main pathways activated by PA include BCAAs, lipids, and bile acid metabolism, thereby improving insulin resistance in pregnant individuals. Despite these known benefits, the underlying metabolites and biological mechanisms affected by PA remain poorly understood, highlighting the need for further investigation. Metabolomics, a comprehensive study of metabolite classes, offers valuable insights into the widespread metabolic changes induced by PA. This narrative review focuses on PA metabolomics research using different analytical platforms to analyze pregnant individuals. Existing studies support the hypothesis that exercise behaviour can influence the metabolism of different populations, including pregnant individuals and their offspring. While PA has shown considerable promise in maintaining metabolic health in non-pregnant populations, our comprehension of metabolic changes in the context of a healthy pregnancy remains limited. As a result, further investigation is necessary to clarify the metabolic impact of PA within this unique group, often excluded from physiological research.
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Affiliation(s)
- Ana Carolina Rosa da Silva
- School of Human Kinetics, Faculty of Health Science, University of Ottawa, Ottawa, ON K1N 6N5, Canada; (A.C.R.d.S.)
| | - Anahita Yadegari
- School of Human Kinetics, Faculty of Health Science, University of Ottawa, Ottawa, ON K1N 6N5, Canada; (A.C.R.d.S.)
| | - Velislava Tzaneva
- School of Human Kinetics, Faculty of Health Science, University of Ottawa, Ottawa, ON K1N 6N5, Canada; (A.C.R.d.S.)
| | - Tarushika Vasanthan
- Department of Chemistry and Biology, Toronto Metropolitan University, Toronto, ON M5G 2A7, Canada
| | - Katarina Laketic
- Alberta Children’s Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Jane Shearer
- Department of Biochemistry and Molecular Biology, Faculty of Kinesiology, Cumming School of Medicine and Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Shannon A. Bainbridge
- Interdisciplinary School of Health Sciences, Faculty of Health Sciences, Ottawa, ON K1N 6N5, Canada
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Cory Harris
- Department of Biology, University of Ottawa, Ottawa, ON K1N 6N5, Canada;
| | - Kristi B. Adamo
- School of Human Kinetics, Faculty of Health Science, University of Ottawa, Ottawa, ON K1N 6N5, Canada; (A.C.R.d.S.)
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Halpern G, Braga DPDAF, Morishima C, Setti AS, Setti Jr. AI, Borges Jr. E. Beetroot, watermelon and ginger juice supplementation may increase the clinical outcomes of Intracytoplasmic Sperm Injection cycles. JBRA Assist Reprod 2023; 27:490-495. [PMID: 37459441 PMCID: PMC10712821 DOI: 10.5935/1518-0557.20230012] [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: 08/17/2022] [Accepted: 02/20/2023] [Indexed: 09/13/2023] Open
Abstract
OBJECTIVE To prove the hypothesis that beetroot, watermelon and ginger juice supplementation improves the endometrial receptivity and clinical outcomes of intracytoplasmic sperm injection (ICSI) cycles. METHODS This prospective randomized study enrolled 436 female patients undergoing ICSI cycles from January/2018 to June/2021, in a private university-affiliated IVF center. Female patients were randomized in a 1:3 ratio to either Control (n=109) or Supplementation Group (n=327). All patients received nutritional orientation before the beginning of the treatment. Participants in the Supplementation Group were instructed to intake a daily dose of homemade juice, prepared with fresh beetroot, watermelon and ginger, from the day of embryo transfer until the day of pregnancy test, while patients in Control Group did not follow the juice protocol. Generalized Linear Models, adjusted for potential confounders (female age, body mass index - BMI, endometrial thickness upon embryo transfer, and number of transferred embryos), followed by Bonferroni post hoc test for the comparison of means between groups, were used to investigate the impact of juice supplementation on the clinical outcomes of ICSI. RESULTS Patients and cycles characteristics were equally distributed among Supplementation and Control groups. Implantation rate (25.2% vs. 20.5%, p<0.001) and clinical pregnancy rate (41.0% vs. 22.0%, p=0.039) were significantly higher in the Supplementation compared to the Control group. CONCLUSIONS The use of beetroot, watermelon and ginger juice may be considered a promising strategy for improving clinical outcomes in assisted reproductive technology (ART), without any side effects.
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Affiliation(s)
- Gabriela Halpern
- Fertility Medical Group, Av. Brigadeiro Luiz Antônio, 4545.
São Paulo – SP, Brazil. Zip: 01401-002
| | - Daniela Paes de Almeida Ferreira Braga
- Fertility Medical Group, Av. Brigadeiro Luiz Antônio, 4545.
São Paulo – SP, Brazil. Zip: 01401-002
- Instituto Sapientiae – Centro de Estudos e Pesquisa em
Reprodução Assistida Rua Vieira Maciel, 62. São Paulo – SP,
Brazil. Zip: 04503-040
| | - Christina Morishima
- Instituto Sapientiae – Centro de Estudos e Pesquisa em
Reprodução Assistida Rua Vieira Maciel, 62. São Paulo – SP,
Brazil. Zip: 04503-040
| | - Amanda Souza Setti
- Fertility Medical Group, Av. Brigadeiro Luiz Antônio, 4545.
São Paulo – SP, Brazil. Zip: 01401-002
- Instituto Sapientiae – Centro de Estudos e Pesquisa em
Reprodução Assistida Rua Vieira Maciel, 62. São Paulo – SP,
Brazil. Zip: 04503-040
| | | | - Edson Borges Jr.
- Fertility Medical Group, Av. Brigadeiro Luiz Antônio, 4545.
São Paulo – SP, Brazil. Zip: 01401-002
- Instituto Sapientiae – Centro de Estudos e Pesquisa em
Reprodução Assistida Rua Vieira Maciel, 62. São Paulo – SP,
Brazil. Zip: 04503-040
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Wiącek J, Karolkiewicz J. Different Approaches to Ergogenic, Pre-, and Probiotic Supplementation in Sports with Different Metabolism Characteristics: A Mini Review. Nutrients 2023; 15:nu15061541. [PMID: 36986269 PMCID: PMC10056922 DOI: 10.3390/nu15061541] [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: 02/22/2023] [Revised: 03/15/2023] [Accepted: 03/21/2023] [Indexed: 03/30/2023] Open
Abstract
Sport disciplines with different metabolic characteristics require different dietary approaches. Bodybuilders or sprinters ("anaerobic" athletes) need a high-protein diet (HPD) in order to activate muscle protein synthesis after exercise-induced muscle damage and use nitric oxide enhancers (such as citrulline and nitrates) to increase vasodilatation, whereas endurance athletes, such as runners or cyclists ("aerobic" athletes), prefer a high-carbohydrate diet (HCHD), which aims to restore the intramuscular glycogen, and supplements containing buffering agents (such as sodium bicarbonate and beta-alanine). In both cases, nutrient absorption, neurotransmitter and immune cell production and muscle recovery depend on gut bacteria and their metabolites. However, there is still insufficient data on the impact of an HPD or HCHD in addition to supplements on "anaerobic" and "aerobic" athletes' gut microbiota and how this impact could be affected by nutritional interventions such as pre- and probiotic therapy. Additionally, little is known about the role of probiotics in the ergogenic effects of supplements. Based on the results of our previous research on an HPD in amateur bodybuilders and an HCHD in amateur cyclists, we reviewed human and animal studies on the effects of popular supplements on gut homeostasis and sport performance.
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Affiliation(s)
- Jakub Wiącek
- Food and Nutrition Department, Poznan University of Physical Education, Królowej Jadwigi 27/39, 61-871 Poznań, Poland
| | - Joanna Karolkiewicz
- Food and Nutrition Department, Poznan University of Physical Education, Królowej Jadwigi 27/39, 61-871 Poznań, Poland
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Douda L, Hyšpler R, Mžik M, Vokurková D, Drahošová M, Řeháček V, Čermáková E, Douda T, Cyrany J, Fejfar T, Jirkovský V, Kopáčová M, Kupková B, Vašátko T, Tachecí I, Bureš J. Serum Citrulline and Ornithine: Potential Markers of Coeliac Disease Activity. ACTA MEDICA (HRADEC KRALOVE) 2023; 65:75-82. [PMID: 36735884 DOI: 10.14712/18059694.2022.22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
INTRODUCTION To date, there is not generally accepted and universal indicator of activity, and functional integrity of the small intestine in patients with coeliac disease. The aim of our study was to investigate whether serum concentrations of the non-essential amino acids citrulline and ornithine might have this function. METHODS We examined serum citrulline and ornithine concentrations in a subgroup of patients with proven coeliac disease and healthy controls (blood donors). RESULTS A total of 94 patients with coeliac disease (29 men, mean age 53 ± 18 years; 65 women, mean age 44 ± 14 years) and 35 healthy controls (blood donors) in whom coeliac disease was serologically excluded (10 men, mean age 51 ± 14 years; 25 women, mean age 46 ± 12 years) were included in the study. Significantly lower concentrations of serum ornithine were found in patients with coeliac disease (mean 65 ± 3 μmol/L; median 63 μmol/L, IQR 34 μmol/L, p < 0.001). No statistically nor clinically significant differences were found in the citrulline concentrations between the study and control group. CONCLUSIONS Serum ornithine (but not citrulline) may be useful for assessing the functional status of the small intestine in uncomplicated coeliac disease. Further studies involving more detailed analysis of dietary and metabolic changes in patients will be needed to reach definitive conclusions.
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Affiliation(s)
- Ladislav Douda
- 2nd Department of Internal Medicine - Gastroenterology, Charles University, Faculty of Medicine in Hradec Králové and University Hospital Hradec Králové, Czech Republic
| | - Radomír Hyšpler
- Institute of Clinical Biochemistry and Diagnostics, Charles University, Faculty of Medicine in Hradec Králové and University Hospital Hradec Králové, Czech Republic
| | - Martin Mžik
- Institute of Clinical Biochemistry and Diagnostics, Charles University, Faculty of Medicine in Hradec Králové and University Hospital Hradec Králové, Czech Republic
| | - Doris Vokurková
- Department of Clinical Immunology and Allergology, Charles University, Faculty of Medicine in Hradec Králové and University Hospital Hradec Králové, Czech Republic
| | - Marcela Drahošová
- Department of Clinical Immunology and Allergology, Charles University, Faculty of Medicine in Hradec Králové and University Hospital Hradec Králové, Czech Republic
| | - Vít Řeháček
- Transfusion Department, University Hospital Hradec Králové, Czech Republic
| | - Eva Čermáková
- Department of Medical Biophysic, Charles University, Faculty of Medicine in Hradec Králové, Czech Republic
| | - Tomáš Douda
- 2nd Department of Internal Medicine - Gastroenterology, Charles University, Faculty of Medicine in Hradec Králové and University Hospital Hradec Králové, Czech Republic
| | - Jiří Cyrany
- 2nd Department of Internal Medicine - Gastroenterology, Charles University, Faculty of Medicine in Hradec Králové and University Hospital Hradec Králové, Czech Republic
| | - Tomáš Fejfar
- 2nd Department of Internal Medicine - Gastroenterology, Charles University, Faculty of Medicine in Hradec Králové and University Hospital Hradec Králové, Czech Republic
| | - Václav Jirkovský
- 2nd Department of Internal Medicine - Gastroenterology, Charles University, Faculty of Medicine in Hradec Králové and University Hospital Hradec Králové, Czech Republic
| | - Marcela Kopáčová
- 2nd Department of Internal Medicine - Gastroenterology, Charles University, Faculty of Medicine in Hradec Králové and University Hospital Hradec Králové, Czech Republic
| | - Blanka Kupková
- 2nd Department of Internal Medicine - Gastroenterology, Charles University, Faculty of Medicine in Hradec Králové and University Hospital Hradec Králové, Czech Republic
| | - Tomáš Vašátko
- 2nd Department of Internal Medicine - Gastroenterology, Charles University, Faculty of Medicine in Hradec Králové and University Hospital Hradec Králové, Czech Republic
| | - Ilja Tachecí
- 2nd Department of Internal Medicine - Gastroenterology, Charles University, Faculty of Medicine in Hradec Králové and University Hospital Hradec Králové, Czech Republic.
| | - Jan Bureš
- Biomedical Research Centre, University Hospital Hradec Králové, Hradec Králové, Czech Republic
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Travaglio M, Michopoulos F, Yu Y, Popovic R, Foster E, Coen M, Martins LM. Increased cysteine metabolism in PINK1 models of Parkinson's disease. Dis Model Mech 2023; 16:286748. [PMID: 36695500 PMCID: PMC9903142 DOI: 10.1242/dmm.049727] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 11/21/2022] [Indexed: 01/26/2023] Open
Abstract
Parkinson's disease (PD), an age-dependent neurodegenerative disease, is characterised by the selective loss of dopaminergic neurons in the substantia nigra (SN). Mitochondrial dysfunction is a hallmark of PD, and mutations in PINK1, a gene necessary for mitochondrial fitness, cause PD. Drosophila melanogaster flies with pink1 mutations exhibit mitochondrial defects and dopaminergic cell loss and are used as a PD model. To gain an integrated view of the cellular changes caused by defects in the PINK1 pathway of mitochondrial quality control, we combined metabolomics and transcriptomics analysis in pink1-mutant flies with human induced pluripotent stem cell (iPSC)-derived neural precursor cells (NPCs) with a PINK1 mutation. We observed alterations in cysteine metabolism in both the fly and human PD models. Mitochondrial dysfunction in the NPCs resulted in changes in several metabolites that are linked to cysteine synthesis and increased glutathione levels. We conclude that alterations in cysteine metabolism may compensate for increased oxidative stress in PD, revealing a unifying mechanism of early-stage PD pathology that may be targeted for drug development. This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Marco Travaglio
- MRC Toxicology Unit, University of Cambridge, Gleeson Building, Tennis Court Road, Cambridge CB2 1QR, UK,Oncology Safety, Clinical Pharmacology & Safety Sciences, R&D, AstraZeneca, Cambridge, UK
| | | | - Yizhou Yu
- MRC Toxicology Unit, University of Cambridge, Gleeson Building, Tennis Court Road, Cambridge CB2 1QR, UK
| | - Rebeka Popovic
- MRC Toxicology Unit, University of Cambridge, Gleeson Building, Tennis Court Road, Cambridge CB2 1QR, UK
| | - Edmund Foster
- Neuroscience Safety, Clinical Pharmacology & Safety Sciences, R&D, AstraZeneca, Cambridge, UK
| | - Muireann Coen
- Oncology Safety, Clinical Pharmacology & Safety Sciences, R&D, AstraZeneca, Cambridge, UK,Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College, London, UK
| | - L. Miguel Martins
- MRC Toxicology Unit, University of Cambridge, Gleeson Building, Tennis Court Road, Cambridge CB2 1QR, UK,Author for correspondence ()
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Wang S, Zou X, Wang L, Zhou H, Wu L, Zhang Y, Yao TX, Chen L, Li Y, Zeng Y, Zhang L. Potential preventive markers in the intracerebral hemorrhage process are revealed by serum untargeted metabolomics in mice using hypertensive cerebral microbleeds. Front Endocrinol (Lausanne) 2023; 14:1084858. [PMID: 37152968 PMCID: PMC10159181 DOI: 10.3389/fendo.2023.1084858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 04/03/2023] [Indexed: 05/09/2023] Open
Abstract
Hypertensive cerebral microbleeds (HCMB) may be the early stage of hypertensive intracerebral hemorrhage (HICH), which is a serious threat to health due to its high mortality and disability rates. The early clinical symptoms of HCMB may not be significant. Moreover, it is difficult to achieve early diagnosis and intervention for targeted prevention of HICH. Although hypertension (HTN) is a predisposition for HCMB, it remains unclear whether there is any difference between hypertensive patients with or without HCMB. Therefore, we carried out liquid chromatography-mass spectrometry (LC-MS) to analyze early biomarkers for HCMB in mice with hypertension and to lay the foundation for early prevention of HICH in hypertensive patients. In total, 18 C57 male mice were randomly divided into the HCMB (n = 6), HTN (n = 6), and control groups (CON, n = 6). Hematoxylin-eosin and diaminobenzidine staining were used to assess the reliability of the model. The metabolite expression level and sample category stability were tested using the displacement test of orthogonal partial least squares discriminant analysis (OPLS-DA). Significant differences in metabolites were screened out using variable importance in the projection (VIP > 1), which were determined using the OPLS-DA model and the P-value of the t-test (P < 0.05) combined with the nonparametric rank-sum test. With an area under the curve (AUC) > 0.85 and a P-value of 0.05, the receiver operating characteristic curve (ROC) was used to further screen the distinct metabolites of HCMB. Compared with the HTN and CON groups, the HCMB group had significantly higher blood pressure and lower average body weight (P < 0.05). Through untargeted LC-MS analysis, 93 distinct metabolites were identified in the HCMB (P < 0.05, VIP > 1) group. Among these potential biomarkers, six significantly decreased and eight significantly increased differential metabolites were found. Meanwhile, we found that the HCMB group had statistically distinct arginine and purine metabolism pathways (P < 0.05), and citrulline may be the most significant possible biomarker of HCMB (AUC > 0.85, P < 0.05). All of these potential biomarkers may serve as early biomarkers for HICH in hypertension.
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Affiliation(s)
- Sai Wang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Xuelun Zou
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Leiyun Wang
- Department of Pharmacy, Wuhan First Hospital, Wuhan, Hubei, China
| | - Huifang Zhou
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Lianxu Wu
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yupeng Zhang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Tian-Xing Yao
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Lei Chen
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Ye Li
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yi- Zeng
- Department of Geriatrics, Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Le Zhang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China
- Multi-Modal Monitoring Technology for Severe Cerebrovascular Disease of Human Engineering Research Center, Xiangya Hospital, Central South University, Changsha, Hunan, China
- *Correspondence: Le Zhang,
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Arshad HM, Ahmad FUD, Lodhi AH. Methanolic Extract of Aerva javanica Leaves Prevents LPS-Induced Depressive Like Behavior in Experimental Mice. Drug Des Devel Ther 2022; 16:4179-4204. [PMID: 36514526 PMCID: PMC9741839 DOI: 10.2147/dddt.s383054] [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: 09/22/2022] [Accepted: 11/29/2022] [Indexed: 12/12/2022] Open
Abstract
Aim Depression is a chronic recurrent neuropsychiatric disorder associated with inflammation. This study explored the pharmacological activities of Aerva javanica leaves crude extract (Aj.Cr) on lipopolysaccharide (LPS)-induced depressive-like behavior in experimental mice. Methods Aj.Cr was evaluated for its phenolic and flavonoid contents, bioactive potential, amino acid profiling and enzyme inhibition assays using different analytical techniques followed by in-silico molecular docking was performed. In addition, three ligands identified in HPLC analysis and standard galantamine were docked to acetyl cholinesterase (AchE) enzyme to assess the ligand interaction along with their binding affinities. In in-vivo analysis, mice were given normal saline (10 mL/kg), imipramine (10 mg/kg) and Aj.Cr (100, 300, and 500 mg/kg) orally for 14-consecutive days. On the 14th day, respective treatment was given 30-minutes before intra-peritoneal administration of (0.83 mg/kg) LPS. Open field, forced swim and tail suspension tests were performed 24-hours after LPS injection, followed by a sucrose preference test 48-hours later. Serum corticosterone levels, as well as levels of nitric oxide (NO), malondialdehyde (MDA), glutathione (GSH), superoxide dismutase (SOD), catalase (CAT), tumor necrosis factor-alpha (TNF-), interleukin-1β (IL-1β), interleukin-6 (IL-6), brain-derived neurotrophic factor (BDNF) and catecholamines were determined in brain tissues. Results In-vitro results revealed that crude extract of Aj.Cr possesses anti-depressant agents with solid antioxidant potential. In-vivo analysis showed that LPS significantly increased depressive-like behavior followed by alteration in serum and tissue biomarkers as compared to normal control (p < 0.001). While imipramine and Aj.Cr (100, 300, and 500 mg/kg) treated groups significantly (p<0.05) improved the depressive-like behavior and biomarkers when compared to the LPS group. Conclusion The mitigation of LPS-induced depressive-like behavior by Aj.Cr may be linked to the modulation of oxidative stress, neuro-inflammation and catecholamines due to the presence of potent bioactive compounds exerting anti-depressant effects.
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Affiliation(s)
- Hafiza Maida Arshad
- Department of Pharmacology, Faculty of Pharmacy, the Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Fiaz-ud-Din Ahmad
- Department of Pharmacology, Faculty of Pharmacy, the Islamia University of Bahawalpur, Bahawalpur, Pakistan,Correspondence: Fiaz-ud-Din Ahmad, Department of Pharmacology, the Islamia University of Bahawalpur, Pakistan Khawaja Fareed Campus, Railway Road, Bahawalpur, 63100, Pakistan, Tel +92-320-8402376, Email
| | - Arslan Hussain Lodhi
- Department of Pharmacology, Faculty of Pharmacy, the Islamia University of Bahawalpur, Bahawalpur, Pakistan
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10
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Abstract
The aim of the article is to examine side effects of increased dietary intake of amino acids, which are commonly used as a dietary supplement. In addition to toxicity, mutagenicity and carcinogenicity, attention is focused on renal and gastrointestinal tract functions, ammonia production, and consequences of a competition with other amino acids for a carrier at the cell membranes and enzymes responsible for their degradation. In alphabetic order are examined arginine, β-alanine, branched-chain amino acids, carnosine, citrulline, creatine, glutamine, histidine, β-hydroxy-β-methylbutyrate, leucine, and tryptophan. In the article is shown that enhanced intake of most amino acid supplements may not be risk-free and can cause a number of detrimental side effects. Further research is necessary to elucidate effects of high doses and long-term consumption of amino acid supplements on immune system, brain function, muscle protein balance, synthesis of toxic metabolites, and tumor growth and examine their suitability under certain circumstances. These include elderly, childhood, pregnancy, nursing a baby, and medical condition, such as diabetes and liver disease. Studies are also needed to examine adaptive response to a long-term intake of any substance and consequences of discontinuation of supplementation.
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Affiliation(s)
- M HOLEČEK
- Department of Physiology, Faculty of Medicine in Hradec Králové, Charles University, Hradec Králové, Czech Republic
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11
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Uyanga VA, Amevor FK, Liu M, Cui Z, Zhao X, Lin H. Potential Implications of Citrulline and Quercetin on Gut Functioning of Monogastric Animals and Humans: A Comprehensive Review. Nutrients 2021; 13:3782. [PMID: 34836037 PMCID: PMC8621968 DOI: 10.3390/nu13113782] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 09/18/2021] [Accepted: 10/19/2021] [Indexed: 12/26/2022] Open
Abstract
The importance of gut health in animal welfare and wellbeing is undisputable. The intestinal microbiota plays an essential role in the metabolic, nutritional, physiological, and immunological processes of animals. Therefore, the rapid development of dietary supplements to improve gut functions and homeostasis is imminent. Recent studies have uncovered the beneficial effects of dietary supplements on the immune response, microbiota, gut homeostasis, and intestinal health. The application of citrulline (a functional gut biomarker) and quercetin (a known potent flavonoid) to promote gut functions has gained considerable interest as both bioactive substances possess anti-inflammatory, anti-oxidative, and immunomodulatory properties. Research has demonstrated that both citrulline and quercetin can mediate gut activities by combating disruptions to the intestinal integrity and alterations to the gut microbiota. In addition, citrulline and quercetin play crucial roles in maintaining intestinal immune tolerance and gut health. However, the synergistic benefits which these dietary supplements (citrulline and quercetin) may afford to simultaneously promote gut functions remain to be explored. Therefore, this review summarizes the modulatory effects of citrulline and quercetin on the intestinal integrity and gut microbiota, and further expounds on their potential synergistic roles to attenuate intestinal inflammation and promote gut health.
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Affiliation(s)
- Victoria Anthony Uyanga
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control, Department of Animal Science, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai’an City 271018, China; (V.A.U.); (M.L.)
- Organization of African Academic Doctors (OAAD), Off Kamiti Road, Nairobi P.O. Box 25305-00100, Kenya;
| | - Felix Kwame Amevor
- Organization of African Academic Doctors (OAAD), Off Kamiti Road, Nairobi P.O. Box 25305-00100, Kenya;
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China;
| | - Min Liu
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control, Department of Animal Science, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai’an City 271018, China; (V.A.U.); (M.L.)
| | - Zhifu Cui
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China;
| | - Xiaoling Zhao
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China;
| | - Hai Lin
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control, Department of Animal Science, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai’an City 271018, China; (V.A.U.); (M.L.)
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12
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Watermelon powder supplementation reduces colonic cell proliferation and aberrant crypt foci by upregulating p21Waf1/Cip1 expression. J Funct Foods 2021. [DOI: 10.1016/j.jff.2021.104667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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13
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Treatment with L-Citrulline in patients with post-polio syndrome: A single center, randomized, double blind, placebo-controlled trial. Neuromuscul Disord 2021; 31:1136-1143. [PMID: 34711479 DOI: 10.1016/j.nmd.2021.08.011] [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: 04/07/2021] [Revised: 08/15/2021] [Accepted: 08/18/2021] [Indexed: 11/23/2022]
Abstract
This single-centered, randomized, double-blind, placebo-controlled study reports the results of L-Citrulline treatment for 24 weeks in patients with post-polio syndrome (PPS). Twenty-nine patients were randomized and assigned into receiving a treatment of 15 g L-Citrulline or placebo. The primary endpoint was the change of the 6 min walking distance test. Secondary endpoints included motor function measure, quantitative muscle strength, quantitative MRI and self-reported impairment questionnaires. Patients receiving L-Citrulline walked 17.5 longer in the 6 min walking distance test when compared to placebo group, however not statistically significant (95% CI = -14.69; 49.68, p = 0.298). None of the secondary endpoints showed a statistically significant change in the L-Citrulline group when compared to placebo group. The motor function measure showed a change of -0.78 (95% CI= [-3.39; 1.83] p = 0.563). Muscle degeneration of leg muscles assessed with quantitative MRI indicated no significant change (estimate= -0.01, 95% CI =-0.13; 0.11, p = 0.869). L-Citrulline was safe and well tolerated. In conclusion, administration of 15 g L-Citrulline daily for 24 weeks to patients with PPS showed no beneficial treatment effect in timed muscle function.
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14
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Citrulline, Biomarker of Enterocyte Functional Mass and Dietary Supplement. Metabolism, Transport, and Current Evidence for Clinical Use. Nutrients 2021; 13:nu13082794. [PMID: 34444954 PMCID: PMC8398474 DOI: 10.3390/nu13082794] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 07/28/2021] [Accepted: 07/28/2021] [Indexed: 12/25/2022] Open
Abstract
L-Citrulline is a non-essential but still important amino acid that is released from enterocytes. Because plasma levels are reduced in case of impaired intestinal function, it has become a biomarker to monitor intestinal integrity. Moreover, oxidative stress induces protein citrullination, and antibodies against anti-citrullinated proteins are useful to monitor rheumatoid diseases. Citrullinated histones, however, may even predict a worse outcome in cancer patients. Supplementation of citrulline is better tolerated compared to arginine and might be useful to slightly improve muscle strength or protein balance. The following article shall provide an overview of L-citrulline properties and functions, as well as the current evidence for its use as a biomarker or as a therapeutic supplement.
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15
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Effect of age, stress and protein supply on plasma amino acids during continuous enteral nutrition; a pragmatic study in rats. Clin Nutr 2021; 40:3931-3939. [PMID: 34139466 DOI: 10.1016/j.clnu.2021.04.045] [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: 10/27/2020] [Revised: 03/18/2021] [Accepted: 04/28/2021] [Indexed: 11/20/2022]
Abstract
BACKGROUND & AIMS As life expectancy increases, an increasing older population may require surgery with perioperative nutritional management. While little is known about the combined effect of age and stress on amino acid metabolism during enteral nutrition, we hypothesized that blood amino acid bioavailability may be influenced not only by the characteristics of the ingested protein but also by intestinal ageing and splanchnic sequestration of amino acids. Plasma amino acid kinetics were thus evaluated in aged and adult rats receiving continuous enteral nutrition before and after standardized surgical stress. METHODS Sixteen 5-month-old and sixteen 21-month-old male rats were used. After a gastrostomy, the insertion of a jugular vein catheter and a one-week recovery, the animals were enterally fed with commercially available formulas containing whole milk proteins or a whey hydrolysate for 24 h before (healthy state) and 18 h after a standardized laparotomy (surgical stress). Data were analyzed by 3-factor ANOVA. RESULTS In all rats, enteral nutrition was associated with a marked increase in plasma alanine, threonine, lysine and proline (+50 to +150 μmol/L; p < 0.001), and a decrease in glycine (≈-80 μmol/L; p < 0.01). For most amino acids, their availability depended first on the amino acid composition of each protein and second on surgical stress. Aging was only associated with higher tyrosine and threonine availability (p < 0.001). There was only limited statistical interaction between age and surgical stress. CONCLUSION In rats, plasma amino acid availability during continuous enteral nutrition is determined by the nature of the protein source and the occurrence of stress. The effects of aging on plasma amino acid availability seem very limited. Commonly used formulas therefore appear to be as suitable for elderly patients as for adult patients.
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16
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Evaluation of Analytes Characterized with Potential Protective Action after Rat Exposure to Lead. Molecules 2021; 26:molecules26082163. [PMID: 33918725 PMCID: PMC8069014 DOI: 10.3390/molecules26082163] [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: 03/09/2021] [Revised: 04/07/2021] [Accepted: 04/08/2021] [Indexed: 11/17/2022] Open
Abstract
Lead (Pb) was revealed for its role as a neurodevelopmental toxin. The determination of neurotransmitters (NTs) in particular brain regions could ameliorate the precise description and optimization of therapeutic protocols able to restore the harmony of signaling pathways in nervous and immune systems. The determination of selected analytes from the group of NTs based on the liquid chromatography (LC)-based method was carried out to illustrate the changes of amino acid (AA) and biogenic amine (BA) profiles observed in chosen immune and nervous systems rat tissues after Pb intoxication. Also, a protective combination of AA was proposed to correct the changes caused by Pb intoxication. After the administration of Pb, changes were observed in all organs studied and were characterized by a fluctuation of NT concentrations in immune and nervous systems (hypothalamus samples). Using a protective mixture of bioactive compounds prevented numerous changes in the balance of NT. The combined analysis of the immune and nervous system while the normalizing effect of curative agents on the level of differentially secreted NTs and AA is studied could present a new approach to the harmonization of those two essential systems after Pb intoxication.
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17
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Aslam A, Shengjie Z, Xuqiang L, Nan H, Wenge L. Rootstock mediates transcriptional regulation of citrulline metabolism in grafted watermelon. BRAZ J BIOL 2021; 81:125-136. [PMID: 32321067 DOI: 10.1590/1519-6984.223633] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 10/17/2019] [Indexed: 11/21/2022] Open
Abstract
Citrulline is a non-essential amino acid, involved in key biological functions in plants and humans. Rootstocks have a major impact on citrulline accumulation in grafted watermelon. Information regarding rootstock induced changes in citrulline metabolism is elusive. To understand the regulatory mechanism, parallel changes in the expression profiles of citrulline metabolic genes and citrulline content of watermelon were monitored during the development of self-rooted watermelon and watermelon grafted onto pumpkin, wild and bottle gourd rootstocks. Results demonstrated that rootstocks regulated the expression profiles in different ways to influence the citrulline content. GAT, NAGPR, ASS3 ASS2 and Asl2 showed the negative correlation with citrulline content in pumpkin grafted watermelon. Pumpkin rootstock promoted the citrulline content by high down-regulation and synergistic effect of ASS2, ASS3, ASL1 and ASl2 genes. In wild grafted watermelon, citrulline was accumulated as a result of down regulation of GAT, NAGS and ASL2 genes, which showed an inverse correlation with citrulline. In gourd grafted watermelon, changes in citrulline content were observed to be linked with lower expressions of GAT, NAGK, ASS2, ASS3, ASL1 and ARG which were negatively correlated with citrulline content. Our study will provide the basis to understand the molecular mechanism of citrulline accumulation in various rootstocks.
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Affiliation(s)
- A Aslam
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, Henan 450009, China
| | - Z Shengjie
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, Henan 450009, China
| | - L Xuqiang
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, Henan 450009, China
| | - H Nan
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, Henan 450009, China
| | - L Wenge
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, Henan 450009, China
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Jegatheesan P, Vicente C, Marquet de Rouge P, Neveux N, Ramassamy R, Magassa S, Aussel C, Raynaud-Simon A, Cynober L, De Bandt JP. Combined effect of citrulline and lactoserum on amino acid availability in aged rats. Nutrition 2021; 87-88:111196. [PMID: 33744643 DOI: 10.1016/j.nut.2021.111196] [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: 11/05/2020] [Revised: 01/28/2021] [Accepted: 01/30/2021] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Age-associated sarcopenia is due to anabolic resistance to feeding. Muscle protein synthesis is improved by fast proteins (e.g., lactoserum), which increase peripheral amino acid (AA) bioavailability more rapidly than slow proteins (e.g., casein), and by citrulline. Citrulline, which limits splanchnic sequestration of AA, may more effectively increase peripheral AA bioavailability when combined with lactoserum than with casein when administered as an oral nutritional protein supplement. METHODS In this study, 25 fasted aged rats received a single gavage administration of lactoserum or casein 0.4 g/kg, alone or with citrulline 0.4 g/kg, and AA pharmacokinetics, glucose, insulin, triglycerides, and insulin-like growth factor 1 (IGF1) were monitored for 4 h. At 4 h, muscle protein and AA contents and protein synthesis activation were measured. RESULTS While lactoserum was associated with higher AA availability, citrulline exerts only limited effects on the plasma profile of AAs from the two proteins. Maximum plasma citrulline was reached earlier with casein (T90 min) than with lactoserum (T120 min). A protein x citrulline interaction was observed for some plasma and muscle AA levels with a significant activation of mechanistic target of rapamycin complex 1 (mTORC1) signaling suggesting higher anabolism with the combination of citrulline and lactoserum. Lower plasma and muscle AA levels with citrulline and lactoserum compared to lactoserum alone suggest a greater AA utilization in a context of muscle anabolic signaling activation. CONCLUSION Provision of a citrulline-lactoserum combination as a nutritional supplement could therefore be beneficial in terms of muscle protein balance and prevention of sarcopenia. Further studies are warranted to evaluate the efficacy of this combination.
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Affiliation(s)
| | | | | | - Nathalie Neveux
- Faculty of Pharmacy, Paris University, Paris, France; Clinical Chemistry Department, Hôpital Cochin, Asssistance Publique - Hôpitaux de Paris, Paris, France
| | | | | | | | - Agathe Raynaud-Simon
- Faculty of Pharmacy, Paris University, Paris, France; Gerontology Department, Hôpital Bichat, Asssistance Publique - Hôpitaux de Paris, HU Paris-Nord-Val-de-Seine, Paris, France
| | - Luc Cynober
- Faculty of Pharmacy, Paris University, Paris, France; Clinical Chemistry Department, Hôpital Cochin, Asssistance Publique - Hôpitaux de Paris, Paris, France
| | - Jean-Pascal De Bandt
- Faculty of Pharmacy, Paris University, Paris, France; Clinical Chemistry Department, Hôpital Cochin, Asssistance Publique - Hôpitaux de Paris, Paris, France.
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Salmani M, Alipoor E, Navid H, Farahbakhsh P, Yaseri M, Imani H. Effect of l-arginine on cardiac reverse remodeling and quality of life in patients with heart failure. Clin Nutr 2021; 40:3037-3044. [PMID: 33610421 DOI: 10.1016/j.clnu.2021.01.044] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 01/14/2021] [Accepted: 01/29/2021] [Indexed: 12/26/2022]
Abstract
BACKGROUND & AIMS Heart failure (HF), as a major cardiac disease, is associated with considerable mortality, morbidities and poor quality of life. The aim of this study was to investigate the effect of l-arginine supplementation on cardiac outcomes and quality of life in patients with ischemic HF. METHODS This double-blind randomized controlled clinical trial was conducted in 50 patients with ischemic HF. Patients were randomly assigned to receive either 3 gr/d l-arginine or placebo, for 10 weeks. Cardiac function (based on echocardiography and six-minute walk test), blood pressure, and quality of life (based on the Minnesota living with heart failure questionnaire) were assessed. RESULTS The results showed significant improvements in ejection fraction (-6.5 ± 8.7 vs. -0.7 ± 7.8%, P = 0.037), left ventricular function (P = 0.043), diastolic dysfunction (P = 0.01) and marginally improvement in changes of left ventricular dimension during diastole (LVDd) (4 ± 6 vs. 0.3 ± 6.9 mm, P = 0.065) in the l-arginine compared to the placebo group. At the end of the study, physical aspect (5.7 ± 3.3 vs. 1.2 ± 6.1, P = 0.002) and total score (10 ± 6.7 vs. 4.1 ± 9.4, P = 0.011) of quality of life improved significantly in the l-arginine compared with the placebo group. Additionally, pre-to post-values of diastolic blood pressure, mean arterial pressure, LVDd, LV ejection fraction, left ventricular function, diastolic dysfunction as well as physical and total scores of quality of life improved significantly within the intervention, but not the placebo, group (all P < 0.05). CONCLUSION This study showed that 3 gr/d l-arginine supplementation for 10 weeks could improve cardiac recovery and function, and quality of life in patients with HF. This study was registered at the Iranian Clinical Trial Registration Center (www.irct.ir) with IRCT20170202032367N4 code.
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Affiliation(s)
- Mahnaz Salmani
- Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Elham Alipoor
- Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Hossein Navid
- Department of Heart Failure and Heart Transplantation, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Payam Farahbakhsh
- Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehdi Yaseri
- Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Hossein Imani
- Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran.
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20
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Filippi J, Rubio A, Lasserre V, Maccario J, Walrand S, Neveux N, Plénier SL, Hébuterne X, Cynober L, Moinard C. Dose-dependent beneficial effects of citrulline supplementation in short bowel syndrome in rats. Nutrition 2021; 85:111118. [PMID: 33545544 DOI: 10.1016/j.nut.2020.111118] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 12/04/2020] [Accepted: 12/07/2020] [Indexed: 12/14/2022]
Abstract
OBJECTIVES Supplementing diet with citrulline has proved an efficient means of preserving nitrogen balance and improving nutritional status after massive intestinal resection. The aim of this study was to model the action of citrulline in gut-resected rats using a dose-ranging study focused on skeletal muscle nitrogen homeostasis. METHODS Forty-six rats were randomly assigned to one of the following groups: citrulline 0.5 g·kg·d-1 (n = 9), citrulline 1 g·kg·d-1 (n = 7), citrulline 2.5 g·kg·d-1 (n = 8), citrulline 5 g·kg·d-1 (n = 8), control (n = 6), and sham (n = 8). The sham group underwent transection and the other groups underwent resection of 80% of the small intestine. All rats were then fed enteral nutrition (EN; all diets were isocaloric and isonitrogenous). After 10 d, the rats were sacrificed to measure and analyze animal weight; duodenum, jejunum, and ileum weight; and muscle trophicity. Protein fractional synthesis rate (FSR) and mammalian target of rapamycin complex (mTORC)1 activation were measured in the tibialis muscle. RESULTS There was a significant dose-dependent association between rat weight and citrulline dose up to 2.5 g·kg·d-1 (P = 0.004). There was a significant improvement in tibialis weight correlated to plasma citrulline. Net protein FSR in the tibialis tended to be greater after resection and tended to return to baseline after citrulline supplementation. Citrulline supplementation significantly decreased the activated phosphorylated forms of S6 K1 (P = 0.003) and S6 RP (P = 0.003), with a significant positive association between myofibrillar FSR and activation of S6 K1 (r = 0.614; P = 0.02) and S6 RP (r = 0.601; P = 0.023). Jejunum weight was significantly positively correlated with plasma citrulline (r = 0.319; P = 0.0345). CONCLUSION Citrulline promotes body weight gain, preserves muscle trophicity, and enhances intestinal adaptation in a dose-dependent manner in a model of resected rats.
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Affiliation(s)
- Jerome Filippi
- Laboratoire de Biologie de la Nutrition, Faculté de Pharmacie, Université Paris-Descartes, Paris, France; Département de Gastroentérologie et Nutrition, Hôpital L'Archet, Nice, France
| | - Amandine Rubio
- Université Grenoble Alpes, Laboratoire Bioénergétique Fondamental et Appliqué, Grenoble, France; Département de Pédiatrie, Hôpital Couple Enfant, CHU Grenoble Alpes, Grenoble, France
| | - Virgine Lasserre
- Laboratoire de Biomathématiques, Faculté de Pharmacie, Université Paris-Descartes, Paris, France
| | - Jean Maccario
- Laboratoire de Biomathématiques, Faculté de Pharmacie, Université Paris-Descartes, Paris, France
| | - Stephanie Walrand
- Université Clermont Auvergne, INRA, UNH, Unité de Nutrition Humaine, CRNH Auvergne, Clermont-Ferrand, France; Service de Biochimie, Hôtel-Dieu Cochin, APHP, Paris, France
| | - Nathalie Neveux
- Laboratoire de Biologie de la Nutrition, Faculté de Pharmacie, Université Paris-Descartes, Paris, France; Service de Biochimie, Hôtel-Dieu Cochin, APHP, Paris, France
| | - Servane Le Plénier
- Laboratoire de Biologie de la Nutrition, Faculté de Pharmacie, Université Paris-Descartes, Paris, France
| | - Xavier Hébuterne
- Département de Gastroentérologie et Nutrition, Hôpital L'Archet, Nice, France
| | - Luc Cynober
- Laboratoire de Biologie de la Nutrition, Faculté de Pharmacie, Université Paris-Descartes, Paris, France; Service de Biochimie, Hôtel-Dieu Cochin, APHP, Paris, France
| | - Christophe Moinard
- Laboratoire de Biologie de la Nutrition, Faculté de Pharmacie, Université Paris-Descartes, Paris, France; Université Grenoble Alpes, Laboratoire Bioénergétique Fondamental et Appliqué, Grenoble, France.
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Shatanawi A, Momani MS, Al-Aqtash R, Hamdan MH, Gharaibeh MN. L-Citrulline Supplementation Increases Plasma Nitric Oxide Levels and Reduces Arginase Activity in Patients With Type 2 Diabetes. Front Pharmacol 2020; 11:584669. [PMID: 33414716 PMCID: PMC7783447 DOI: 10.3389/fphar.2020.584669] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 11/05/2020] [Indexed: 12/12/2022] Open
Abstract
Type 2 diabetes mellitus (T2DM) is becoming a major contributor to cardiovascular disease. One of the early signs of T2DM associated cardiovascular events is the development of vascular dysfunction. This dysfunction has been implicated in increasing the morbidity and mortality of T2DM patients. One of the important characteristics of vascular dysfunction is the impaired ability of endothelial cells to produce nitric oxide (NO). Additionally, decreases in the availability of NO is also a major contributor of this pathology. NO is produced by the activity of endothelial NO synthase (eNOS) on its substrate, L-arginine. Reduced availability of L-arginine to eNOS has been implicated in vascular dysfunction in diabetes. Arginase, which metabolizes L-arginine to urea and ornithine, competes directly with NOS for L-arginine. Hence, increases in arginase activity can decrease arginine levels, reducing its availability to eNOS and decreasing NO production. Diabetes has been linked to elevated arginase and associated vascular endothelial dysfunction. We aimed to determine levels of plasma NO and arginase activity in (T2DM) patients and the effects of L-citrulline supplementation, a natural arginase inhibitor, on inhibiting arginase activity in these patients. Levels of arginase correlated with HbA1c levels in diabetic patients. Twenty-five patients received L-citrulline supplements (2000 mg/day) for 1 month. Arginase activity decreased by 21% in T2DM patients after taking L-citrulline supplements. Additionally, plasma NO levels increased by 38%. There was a modest improvement on H1Ac levels in these patients, though not statistically significant. The effect of L-citrulline on arginase activity was also studied in bovine aortic endothelial cells (BAECs) grown in high glucose (HG) conditions. HG (25 mM, 72 h) caused a 2-fold increase in arginase activity in BAECs and decreased NO production by 30%. L-citrulline (2.5 mM) completely prevented the increase in arginase activity and restored NO production levels. These data indicate that L-citrulline can have therapeutic benefits in diabetic patients through increasing NO levels and thus maintaining vascular function possibly through an arginase inhibition related pathway.
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Affiliation(s)
- Alia Shatanawi
- Department of Pharmacology, School of Medicine, The University of Jordan, Amman, Jordan
| | - Munther S Momani
- Department of Internal Medicine, School of Medicine, The University of Jordan, Amman, Jordan
| | - Ruaa Al-Aqtash
- Department of Pharmacology, School of Medicine, The University of Jordan, Amman, Jordan
| | - Mohammad H Hamdan
- Department of Pharmacology, School of Medicine, The University of Jordan, Amman, Jordan.,Department of Neurosurgery, Saarland University Hospital, Homburg, Germany
| | - Munir N Gharaibeh
- Department of Pharmacology, School of Medicine, The University of Jordan, Amman, Jordan
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Effect of aging on the availability of amino acids from an immune-enhancing diet (IED) after a surgical stress in rats. Clin Nutr 2020; 39:2793-2801. [DOI: 10.1016/j.clnu.2019.12.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 11/25/2019] [Accepted: 12/06/2019] [Indexed: 01/13/2023]
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Figueroa A, Jaime SJ, Morita M, Gonzales JU, Moinard C. L-Citrulline Supports Vascular and Muscular Benefits of Exercise Training in Older Adults. Exerc Sport Sci Rev 2020; 48:133-139. [PMID: 32568925 DOI: 10.1249/jes.0000000000000223] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Age-associated reduction in endothelial nitric oxide (NO) synthesis contributes to the development of cardiovascular diseases and sarcopenia. L-Citrulline is a precursor of NO with the ability to improve vascular function and muscle protein synthesis. We hypothesize that vascular and muscular benefits associated with oral L-citrulline supplementation might be augmented by concomitant supplementation with exercise training in older adults.
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Affiliation(s)
- Arturo Figueroa
- Department of Kinesiology and Sport Management, Texas Tech University, Lubbock, TX
| | - Salvador J Jaime
- Department of Exercise and Sport Science, University of Wisconsin-La Crosse, La Crosse, WI
| | - Masahiko Morita
- Research & Innovation Center, Kyowa Hakko Bio Co Ltd, Tsukuba, Japan
| | - Joaquin U Gonzales
- Department of Kinesiology and Sport Management, Texas Tech University, Lubbock, TX
| | - Christophe Moinard
- Laboratory of Fundamental and SFR Environmental Systems, INSERM U1055, Université Grenoble Alpes, Grenoble, France
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Clark TC, Tinsley J, Sigholt T, Macqueen DJ, Martin SAM. Arginine, ornithine and citrulline supplementation in rainbow trout: Free amino acid dynamics and gene expression responses to bacterial infection. FISH & SHELLFISH IMMUNOLOGY 2020; 98:374-390. [PMID: 31968266 DOI: 10.1016/j.fsi.2020.01.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 01/10/2020] [Accepted: 01/15/2020] [Indexed: 06/10/2023]
Abstract
Supplementing the diet with functional ingredients is a key strategy to improve fish performance and health in aquaculture. The amino acids of the urea and nitric oxide (NO) cycles - arginine, ornithine and citrulline - perform crucial roles in the immune response through the generation of NO and the synthesis of polyamine used for tissue repair. We previously found that citrulline supplementation improves and maintains circulating free arginine levels in rainbow trout more effectively than arginine supplementation. Here, to test whether supplementation of urea cycle amino acids modulates the immune response in rainbow trout (Oncorhynchus mykiss), we supplemented a commercial diet with high levels (2% of total diet) of either arginine, ornithine or citrulline during a 7-week feeding trial, before challenging fish with the bacterium Aeromonas salmonicida. We carried out two separate experiments to investigate fish survival and 24 h post-infection to investigate the immediate response of free amino acid levels, and transcriptional changes in genes encoding urea cycle, NO cycle and polyamine synthesis enzymes. There were no differences in percentage fish mortality between diets, however there were numerous highly significant changes in free amino acid levels and gene expression to both dietary supplementation and infection. Out of 26 amino acids detected in blood plasma, 8 were significantly changed by infection and 9 by dietary supplementation of either arginine, ornithine or citrulline. Taurine, glycine and aspartic acid displayed the largest decreases in circulating levels in infected fish, while ornithine and isoleucine were the only amino acids that increased in concentration. We investigated transcriptional responses of the enzymes involved in arginine metabolism in liver and head kidney; transcripts for polyamine synthesis enzymes showed highly significant increases in both tissues across all diets following infection. The paralogous arginase-encoding genes, Arg1a, Arg1b, Arg2a and Arg2b, displayed complex responses across tissues and also due to diet and infection. Overall, these findings improve our understanding of amino acid metabolism following infection and suggests new potential amino acid targets for improving the immune response in salmonids.
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Affiliation(s)
- T C Clark
- School of Biological Sciences, University of Aberdeen, Tillydrone Avenue, Aberdeen, UK
| | - J Tinsley
- BioMar AS, Grangemouth Docks, Grangemouth, UK
| | | | - D J Macqueen
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, UK
| | - S A M Martin
- School of Biological Sciences, University of Aberdeen, Tillydrone Avenue, Aberdeen, UK.
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Swiderski K, Bindon R, Trieu J, Naim T, Schokman S, Swaminathan M, Leembruggen AJL, Hill-Yardin EL, Koopman R, Bornstein JC, Lynch GS. Spatiotemporal Mapping Reveals Regional Gastrointestinal Dysfunction in mdx Dystrophic Mice Ameliorated by Oral L-arginine Supplementation. J Neurogastroenterol Motil 2020; 26:133-146. [PMID: 31715094 PMCID: PMC6955187 DOI: 10.5056/jnm19029] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 07/09/2019] [Accepted: 07/23/2019] [Indexed: 12/25/2022] Open
Abstract
Background/Aims Patients with Duchenne muscular dystrophy exhibit significant, ongoing impairments in gastrointestinal (GI) function likely resulting from dysregulated nitric oxide production. Compounds increasing neuronal nitric oxide synthase expression and/or activity could improve GI dysfunction and enhance quality of life for dystrophic patients. We used video imaging and spatiotemporal mapping to identify GI dysfunction in mdx dystrophic mice and determine whether dietary intervention to enhance nitric oxide could alleviate aberrant colonic activity in muscular dystrophy. Methods Four-week-old male C57BL/10 and mdx mice received a specialized diet either with no supplementation (control) or supplemented (1 g/kg/day) with L-alanine, L-arginine, or L-citrulline for 8 weeks. At the conclusion of treatment, mice were sacrificed by cervical dislocation and colon motility examined by spatiotemporal (ST) mapping ex vivo. Results ST mapping identified increased contraction number in the mid and distal colon of mdx mice on control and L-alanine supplemented diets relative to C57BL/10 mice (P < 0.05). Administration of either L-arginine or L-citrulline attenuated contraction number in distal colons of mdx mice relative to C57BL/10 mice. Conclusions GI dysfunction in Duchenne muscular dystrophy has been sadly neglected as an issue affecting quality of life. ST mapping identified regional GI dysfunction in the mdx dystrophic mouse. Dietary interventions to increase nitric oxide signaling in the GI tract reduced the number of colonic contractions and alleviated colonic constriction at rest. These findings in mdx mice reveal that L-arginine can improve colonic motility and has potential therapeutic relevance for alleviating GI discomfort, improving clinical care, and enhancing quality of life in Duchenne muscular dystrophy.
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Affiliation(s)
- Kristy Swiderski
- Centre for Muscle Research, Department of Physiology, School of Biomedical Sciences, The University of Melbourne, Australia
| | - Rebecka Bindon
- Centre for Muscle Research, Department of Physiology, School of Biomedical Sciences, The University of Melbourne, Australia
| | - Jennifer Trieu
- Centre for Muscle Research, Department of Physiology, School of Biomedical Sciences, The University of Melbourne, Australia
| | - Timur Naim
- Centre for Muscle Research, Department of Physiology, School of Biomedical Sciences, The University of Melbourne, Australia
| | - Shana Schokman
- Enteric Nervous System Laboratory, Department of Physiology, The University of Melbourne, Australia
| | - Mathusi Swaminathan
- Enteric Nervous System Laboratory, Department of Physiology, The University of Melbourne, Australia
| | - Anita J L Leembruggen
- Enteric Nervous System Laboratory, Department of Physiology, The University of Melbourne, Australia
| | - Elisa L Hill-Yardin
- Enteric Nervous System Laboratory, Department of Physiology, The University of Melbourne, Australia.,Gut-Brain Axis Laboratory, School of Health and Biomedical Sciences, RMIT University, Melbourne, Australia (Current address)
| | - René Koopman
- Centre for Muscle Research, Department of Physiology, School of Biomedical Sciences, The University of Melbourne, Australia
| | - Joel C Bornstein
- Enteric Nervous System Laboratory, Department of Physiology, The University of Melbourne, Australia
| | - Gordon S Lynch
- Centre for Muscle Research, Department of Physiology, School of Biomedical Sciences, The University of Melbourne, Australia
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Ho SW, El-Nezami H, Shah NP. The protective effects of enriched citrulline fermented milk with Lactobacillus helveticus on the intestinal epithelium integrity against Escherichia coli infection. Sci Rep 2020; 10:499. [PMID: 31949265 PMCID: PMC6965087 DOI: 10.1038/s41598-020-57478-w] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Accepted: 11/29/2019] [Indexed: 12/24/2022] Open
Abstract
This study examined the protective effects of citrulline enriched-fermented milk with live Lactobacillus helveticus ASCC 511 (LH511) on intestinal epithelial barrier function and inflammatory response in IPEC-J2 cells caused by pathogenic Escherichia coli. Five percent (v/v) of fermented milk with live LH511 and 4 mM citrulline (5%LHFM_Cit-4mM) significantly stimulated the population of IPEC-J2 cells by 36% as determined by MTT assay. Adhesion level of LH511 was significantly increased by 9.2% when incubated with 5%LHFM_Cit-4mM and 5%LHFM_Cit-4mM reduced the adhesion of enterohemorrhagic (EHEC) and entero-invasive (EIEC) E. coli in IPEC-J2 cells by 35.79% and 42.74%, respectively. Treatment with 5%LHFM_Cit-4mM ameliorated lipopolysaccharide (LPS) from E. coli O55:B5 induced activated inflammatory cytokines expression (TNF-α, IL-6 and IL-8) and concentration (IL-6 and IL-8) and early apoptosis. It restored the transepithelial electrical resistance (TEER) and regulated the expression and distribution of tight junction (TJ) proteins (zonula occluden-1 (ZO-1), occludin and claudin-1), toll-like receptors (TLRs) (TLR2 and TLR4) and negative regulators of TLRs signalling pathway (A20 and IRAK-M). In conclusion, our findings suggested that 5%LHFM_Cit-4mM might have the positive effects on improving and maintaining the intestinal epithelial cell integrity and inflammatory response under both normal and pathogenic LPS-stimulated conditions.
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Affiliation(s)
- Sze Wing Ho
- Food and Nutritional Science, School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Pokfulam, Hong Kong
| | - Hani El-Nezami
- Food and Nutritional Science, School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Pokfulam, Hong Kong
| | - Nagendra P Shah
- Food and Nutritional Science, School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Pokfulam, Hong Kong.
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Effect of citrulline on muscle protein turnover in an in vitro model of muscle catabolism. Nutrition 2020; 71:110597. [PMID: 31896062 DOI: 10.1016/j.nut.2019.110597] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 08/12/2019] [Accepted: 09/11/2019] [Indexed: 12/17/2022]
Abstract
OBJECTIVE Muscle net catabolism, as seen after severe trauma or sepsis or in postoperative situations, is mediated by hormones (e.g., cortisol) and proinflammatory cytokines (e.g., tumor necrosis factor alpha [TNF-α]). Specific amino acids may be able to limit this muscle mass loss. Citrulline (CIT) stimulates muscle protein synthesis in various situations, but little data exist on hypercatabolic situations and the effects on protein breakdown are unknown. Our aim was to assess the effect of CIT on protein turnover in an in vitro model of muscle hypercatabolism. METHODS Myotubes derived from C2C12 myoblasts were treated with 150 nM dexamethasone (DEX), 10 ng/mL TNF-α, or 0.006% ethanol (as control [CON]) for 24 h. Subsequently, myotubes were incubated with or without 5 mM CIT for 6 h. Muscle protein synthesis rate was evaluated by the surface sensing of translation method and by l-[3,5-3H]tyrosine (Tyr) incorporation. The muscle protein breakdown rate was evaluated from Tyr release into culture medium. CIT action was analyzed by non-parametric Kruskal-Wallis and Mann-Whitney tests. RESULTS CIT treatment significantly increased protein synthesis rates compared with the DEX or TNF-α group (surface sensing of translation method; DEX + CIT versus DEX; P = 0.03 and TNF-α+CIT versus TNF-α; P = 0.05) and significantly decreased protein breakdown rate in the CON and DEX groups (CON + CIT versus CON; P = 0.05 and DEX + CIT versus DEX; P = 0.05). CONCLUSIONS CIT treatment regulated muscle protein turnover in an in vitro model of muscle net catabolism. Exploring the underlying mechanisms would also be of interest.
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28
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Effects of supplementation of citrulline and Lactobacillus helveticus ASCC 511 on intestinal epithelial cell integrity. J Funct Foods 2020. [DOI: 10.1016/j.jff.2019.103571] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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Abstract
The prevalence of cognitive decline is increasing as the ageing population is considerably growing. Restricting this age-associated process has become a challenging public health issue. The age-related increase in oxidative stress plays a major role in cognitive decline, because of its harmful effect on functional plasticity of the brain, such as long-term potentiation (LTP). Here, we show that citrulline (Cit) has powerful antioxidant properties that can limit ex vivo oxidative stress-induced LTP impairment in the hippocampus. We also illustrate that a three-month Cit supplementation has a protective effect on LTP in aged rats in vivo. The identification of a Cit oxidation byproduct in vitro suggests that the antioxidant properties of Cit could result from its own oxidation. Cit supplementation may be a promising preventive nutritional approach to limit age-related cognitive decline.
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Clark TC, Tinsley J, Sigholt T, Macqueen DJ, Martin SAM. Supplementation of arginine, ornithine and citrulline in rainbow trout (Oncorhynchus mykiss): Effects on growth, amino acid levels in plasma and gene expression responses in liver tissue. Comp Biochem Physiol A Mol Integr Physiol 2019; 241:110632. [PMID: 31812671 DOI: 10.1016/j.cbpa.2019.110632] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 12/02/2019] [Accepted: 12/03/2019] [Indexed: 12/13/2022]
Abstract
Functional amino acids (FAA) regulate metabolic pathways directly linked to health, survival, growth and development. Arginine is a FAA with crucial roles in protein deposition and the immune response. In mammals, supplementation of arginine's precursor amino acid, citrulline, is known to increase circulating arginine to levels beyond direct arginine supplementation, however, citrulline supplementation is poorly studied in fish. To address this knowledge gap, we supplemented the diet of rainbow trout with arginine and its precursor amino acids, ornithine and citrulline, at 3 levels (0.5%, 1% and 2% of the total diet) during a 14-week experiment. We sampled fish at 3 h and 24 h post-feeding to investigate immediate and steady-state effects, respectively. There were no differences in fish growth for any of the diets across a range of indicators. In blood plasma, out of 26 amino acids detected, 11 and 6 displayed significant changes 24 h and 3 h post-prandial, respectively. Arginine, ornithine and citrulline levels were all significantly increased by the citrulline supplemented diets. In muscle, 8 amino acids were significantly altered by supplemented diets, while there were no significant changes in liver. Arginine was increased by 2% citrulline supplementation in muscle tissue. We also investigated the transcriptional responses of urea cycle, nitric oxide cycle and rate-limiting polyamine synthesis enzymes, related to arginine's metabolism, in liver. At both time points, only 2 enzymes were significantly altered by the supplemented diets, however several significant changes were observed comparing 3 h and 24 h post-prandial expression levels. Of these, the paralogous polyamine synthesis enzyme encoding genes ODC1 and ODC2 displayed the largest increases in 3 h post-prandial fish. These findings demonstrate that endogenous synthesis of arginine is possible from a citrulline supplemented diet and improve our understanding of arginine metabolism in fish.
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Affiliation(s)
- T C Clark
- School of Biological Sciences, University of Aberdeen, Tillydrone Avenue, Aberdeen, UK
| | - J Tinsley
- BioMar AS, Grangemouth Docks, Grangemouth, UK
| | | | - D J Macqueen
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, UK
| | - S A M Martin
- School of Biological Sciences, University of Aberdeen, Tillydrone Avenue, Aberdeen, UK.
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Effect of oral citrulline supplementation on whole body protein metabolism in adult patients with short bowel syndrome: A pilot, randomized, double-blind, cross-over study. Clin Nutr 2019; 38:2599-2606. [DOI: 10.1016/j.clnu.2018.12.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 11/27/2018] [Accepted: 12/26/2018] [Indexed: 11/19/2022]
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Azizi S, Mahdavi R, Vaghef-Mehrabany E, Maleki V, Karamzad N, Ebrahimi-Mameghani M. Potential roles of Citrulline and watermelon extract on metabolic and inflammatory variables in diabetes mellitus, current evidence and future directions: A systematic review. Clin Exp Pharmacol Physiol 2019; 47:187-198. [PMID: 31612510 DOI: 10.1111/1440-1681.13190] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Revised: 09/24/2019] [Accepted: 10/12/2019] [Indexed: 12/24/2022]
Abstract
OBJECTIVE Diabetes mellitus is a prevalent endocrine disorder worldwide. Citrulline is an α-amino acid, which is abundant in watermelon, and a precursor of arginine and nitric oxide. Decreased bioavailability of nitric oxide is associated with insulin resistance. The present systematic review focused on the existing evidence of citrulline and watermelon extract effects on metabolic and inflammatory parameters in diabetes mellitus. METHODS A systematic search of the databases PubMed, Scopus, EMBASE, ProQuest and Google Scholar was conducted for relevant papers published from inception until October 2018. All clinical trials, animal and in vitro studies published in the English language that assessed the role of citrulline and watermelon extract on diabetes mellitus, were eligible. Studies providing inadequate information were excluded. RESULTS Out of 1262 articles we found, only eight articles met the inclusion criteria for analysis. In three studies an increase in the synthesis of nitric oxide was reported with citrulline and watermelon extract supplementation. Four studies showed a significant reduction in blood glucose after supplementation with watermelon extract, and two studies reported a decrease in a number of inflammatory biomarkers following citrulline supplementation. Although citrulline intake caused a significant reduction in HOMA-IR in one study, inconsistent results were revealed on the effects of citrulline and watermelon extract on insulin levels and lipid profile. CONCLUSION Citrulline and watermelon extract could improve nitric oxide synthesis, glycaemic status and inflammation in diabetes mellitus. However, further studies are required to shed light on the underlying mechanisms.
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Affiliation(s)
- Samaneh Azizi
- Department of Biochemistry and Dietetics, Faculty of Nutrition and Food Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Reza Mahdavi
- Nutrition Research Center, Department of Biochemistry and Diet Therapy, School of Nutrition & Food Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Elnaz Vaghef-Mehrabany
- Department of Biochemistry and Dietetics, Faculty of Nutrition and Food Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Vahid Maleki
- Department of Biochemistry and Dietetics, Faculty of Nutrition and Food Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Nahid Karamzad
- Department of Biochemistry and Dietetics, Faculty of Nutrition and Food Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mehrangiz Ebrahimi-Mameghani
- Nutrition Research Center, Department of Biochemistry and Diet Therapy, School of Nutrition & Food Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
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Jegatheesan P, Ramani D, Lhuillier M, El-Hafaia N, Ramassamy R, Aboubacar M, Nakib S, Chen H, Garbay C, Neveux N, Loï C, Cynober L, de Bandt JP. Is N-Carbamoyl Putrescine, the Decarboxylation Derivative of Citrulline, a Regulator of Muscle Protein Metabolism in Rats? Nutrients 2019; 11:nu11112637. [PMID: 31684160 PMCID: PMC6893778 DOI: 10.3390/nu11112637] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 10/26/2019] [Accepted: 10/28/2019] [Indexed: 11/16/2022] Open
Abstract
N-carbamoyl putrescine (NCP), the decarboxylation derivative of citrulline, metabolically related to polyamines, may exert biological effects in mammals. The aim of this study was (i) to evaluate the nutritional properties of NCP in healthy rats and (ii) to determine the effect of NCP administration on muscle metabolism in malnourished old rats. The nutritional properties of NCP were first evaluated in 20 8-week-old male rats randomized to receive for two weeks a standard diet either alone (C group) or supplemented with NCP, 5 or 50 mg/kg/d. In a second study, 29 malnourished 18-month-old male rats were studied either before or after a 4-day refeeding with a standard diet either alone (REN group) or supplemented with NCP, 1 or 10 mg/kg/d. NCP had no effect on weight gain and body composition in either of the two studies. In healthy rats, muscle protein content was significantly increased in the soleus with NCP 5 mg/kg/d. A decrease in plasma glutamine and kidney spermine was observed at the 50 mg/kg/d dose; otherwise, no significant changes in plasma chemistry and tissue polyamines were observed. In malnutrition-induced sarcopenic old rats, refeeding with NCP 10 mg/kg/d was associated with higher tibialis weight and a trend for increased protein content in extensor digitorum longus (EDL). While the muscle protein synthesis rate was similar between groups, ribosomal protein S6 kinase was increased in tibialis and higher in the EDL in NCP-treated rats. The muscle RING-finger protein-1 expression was decreased in tibialis and urinary 3-methyl-histidine to creatinine ratio slightly lower with the supply of NCP. However, this initial period of refeeding was also associated with elevated fasted plasma triglycerides and glucose, significant in NCP groups, suggesting glucose intolerance and possibly insulin resistance. NCP was well-tolerated in healthy young-adults and in malnourished old rats. In healthy adults, NCP at 5 mg/kg/d induced a significant increase in protein content in the soleus, a type I fiber-rich muscle. In malnourished old rats, NCP supply during refeeding, may help to preserve lean mass by limiting protein breakdown; however, these effects may be limited in our model by a possible immediate refeeding-associated glucose intolerance.
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Affiliation(s)
| | - David Ramani
- EA4466, Faculty of Pharmacy, Paris Descartes University, 75270 Paris, France.
- Clinical Chemistry Department, Hôpital Cochin, AP-HP, 75679 Paris, France.
| | - Mickael Lhuillier
- EA4466, Faculty of Pharmacy, Paris Descartes University, 75270 Paris, France.
| | - Naouel El-Hafaia
- EA4466, Faculty of Pharmacy, Paris Descartes University, 75270 Paris, France.
| | - Radji Ramassamy
- EA4466, Faculty of Pharmacy, Paris Descartes University, 75270 Paris, France.
| | - Mohamed Aboubacar
- EA4466, Faculty of Pharmacy, Paris Descartes University, 75270 Paris, France.
| | - Samir Nakib
- EA4466, Faculty of Pharmacy, Paris Descartes University, 75270 Paris, France.
- Clinical Chemistry Department, Hôpital Cochin, AP-HP, 75679 Paris, France.
| | - Huixiong Chen
- Laboratory of Pharmacologic and Toxicologic Chemistry and Biochemistry, UMR 8601 CNRS, Paris Descartes University, 75270 Paris, France.
| | - Christiane Garbay
- Laboratory of Pharmacologic and Toxicologic Chemistry and Biochemistry, UMR 8601 CNRS, Paris Descartes University, 75270 Paris, France.
| | - Nathalie Neveux
- EA4466, Faculty of Pharmacy, Paris Descartes University, 75270 Paris, France.
- Clinical Chemistry Department, Hôpital Cochin, AP-HP, 75679 Paris, France.
| | - Cécile Loï
- EA4466, Faculty of Pharmacy, Paris Descartes University, 75270 Paris, France.
| | - Luc Cynober
- EA4466, Faculty of Pharmacy, Paris Descartes University, 75270 Paris, France.
- Clinical Chemistry Department, Hôpital Cochin, AP-HP, 75679 Paris, France.
| | - Jean-Pascal de Bandt
- EA4466, Faculty of Pharmacy, Paris Descartes University, 75270 Paris, France.
- Clinical Chemistry Department, Hôpital Cochin, AP-HP, 75679 Paris, France.
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Hafner P, Bonati U, Klein A, Rubino D, Gocheva V, Schmidt S, Schroeder J, Bernert G, Laugel V, Steinlin M, Capone A, Gloor M, Bieri O, Hemkens LG, Speich B, Zumbrunn T, Gueven N, Fischer D. Effect of Combination l-Citrulline and Metformin Treatment on Motor Function in Patients With Duchenne Muscular Dystrophy: A Randomized Clinical Trial. JAMA Netw Open 2019; 2:e1914171. [PMID: 31664444 PMCID: PMC6824222 DOI: 10.1001/jamanetworkopen.2019.14171] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
IMPORTANCE Nitric oxide precursors, such as the amino acid l-arginine and the biguanide antidiabetic drug metformin, have been associated with metabolism and muscle function in patients with Duchenne muscular dystrophy (DMD). The treatment of DMD remains an unmet medical need. OBJECTIVE To evaluate the benefits and harms of a combination of l-citrulline and metformin treatment among patients with DMD. DESIGN, SETTING, AND PARTICIPANTS A single-center randomized double-blind placebo-controlled parallel-group clinical trial was conducted between December 12, 2013, and March 30, 2016, at the University Children's Hospital Basel in Switzerland. A total of 47 ambulant male patients aged 6.5 to 10 years with genetically confirmed DMD were recruited locally and from the patient registries of Switzerland, Germany, Austria, and France. Data were analyzed from April 6, 2016, to September 5, 2019. INTERVENTIONS Patients in the treatment group received 2500 mg of l-citrulline and 250 mg of metformin (combination therapy) 3 times a day for 26 weeks compared with patients in the control group, who received placebo. MAIN OUTCOMES AND MEASURES The primary end point was the change in transfer and standing posture, as assessed by the first dimension of the Motor Function Measure, version 32, from baseline to week 26. Secondary end points included assessments of timed function, quantitative muscle force, biomarkers for muscle necrosis, and adverse events. The 2 prespecified subgroups comprised patients who were able to walk 350 m or more in 6 minutes (stable subgroup) and patients who were not able to walk 350 m in 6 minutes (unstable subgroup) at baseline. RESULTS Among 49 ambulant male children with DMD who were screened for eligibility, 47 patients with a mean (SD) age of 8.2 (1.1) years were randomized to a treatment group receiving combination therapy (n = 23) or a control group receiving placebo (n = 24), and 45 patients completed the study. No significant differences between groups were found in the results of timed function and muscle force tests for overall, proximal and axial, and distal motor function. Among patients receiving combination therapy, the Motor Function Measure first dimension subscore decrease was 5.5% greater than that of patients receiving placebo (95% CI, -1.0% to 12.1%; P = .09). The administration of combination therapy had significantly favorable effects on the first dimension subscore decrease among the 29 patients in the stable subgroup (6.7%; 95% CI, 0.9%-12.6%; P = .03) but not among the 15 patients in the unstable subgroup (3.9%; 95% CI, -13.2% to 20.9%; P = .63). Overall, the treatment was well tolerated with only mild adverse effects. CONCLUSIONS AND RELEVANCE Treatment with combination therapy was not associated with an overall reduction in motor function decline among ambulant patients with DMD; however, a reduction in motor function decline was observed among the stable subgroup of patients treated with combination therapy. The statistically nonsignificant difference of distal motor function in favor of combination therapy and the reduced degeneration of muscle tissue appear to support the treatment concept, but the study may have lacked sufficient statistical power. Further research exploring this treatment option with a greater number of patients is warranted. TRIAL REGISTRATION ClinicalTrials.gov identifier: NCT01995032.
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Affiliation(s)
- Patricia Hafner
- Division of Pediatric Neurology, University Children's Hospital Basel, Basel, Switzerland
- Division of Neurology, Medical University Clinic, Kantonsspital Baselland, Bruderholz, Switzerland
| | - Ulrike Bonati
- Division of Pediatric Neurology, University Children's Hospital Basel, Basel, Switzerland
| | - Andrea Klein
- Division of Pediatric Neurology, University Children's Hospital Basel, Basel, Switzerland
- Division of Pediatric Neurology, University of Berne Hospital, Berne, Switzerland
- Division of Pediatric Neurology, Lausanne University Hospital, Lausanne, Switzerland
| | - Daniela Rubino
- Division of Pediatric Neurology, University Children's Hospital Basel, Basel, Switzerland
| | - Vanya Gocheva
- Division of Pediatric Neurology, University Children's Hospital Basel, Basel, Switzerland
| | - Simone Schmidt
- Division of Pediatric Neurology, University Children's Hospital Basel, Basel, Switzerland
- Department of Neurology, University Hospital Basel, Basel, Switzerland
| | - Jonas Schroeder
- Division of Pediatric Neurology, University Children's Hospital Basel, Basel, Switzerland
| | - Günther Bernert
- Department of Pediatrics, Kaiser Franz Josef Hospital, Vienna, Austria
| | - Vincent Laugel
- Department of Pediatric Neurology, Strasbourg University Hospital, Strasbourg, France
| | - Maja Steinlin
- Division of Pediatric Neurology, University of Berne Hospital, Berne, Switzerland
| | - Andrea Capone
- Division of Pediatric Neurology, Children's Hospital, Aarau, Switzerland
| | - Monika Gloor
- Division of Radiological Physics, Department of Radiology, University Hospital Basel, Basel, Switzerland
| | - Oliver Bieri
- Division of Radiological Physics, Department of Radiology, University Hospital Basel, Basel, Switzerland
| | - Lars G. Hemkens
- Basel Institute for Clinical Epidemiology and Biostatistics, Department of Clinical Research, University Hospital Basel, Basel, Switzerland
| | - Benjamin Speich
- Basel Institute for Clinical Epidemiology and Biostatistics, Department of Clinical Research, University Hospital Basel, Basel, Switzerland
| | - Thomas Zumbrunn
- Clinical Trial Unit, Department of Clinical Research, University Hospital Basel, Basel, Switzerland
| | - Nuri Gueven
- Pharmacy, School of Medicine, University of Tasmania, Hobart, Tasmania, Australia
| | - Dirk Fischer
- Division of Pediatric Neurology, University Children's Hospital Basel, Basel, Switzerland
- Division of Neurology, Medical University Clinic, Kantonsspital Baselland, Bruderholz, Switzerland
- Department of Neurology, University Hospital Basel, Basel, Switzerland
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Kuçi O, Verlaan D, Vicente C, Nubret E, Le Plenier S, De Bandt JP, Cynober L. Citrulline and muscle protein homeostasis in three different models of hypercatabolism. Clin Nutr 2019; 39:917-927. [PMID: 31010700 DOI: 10.1016/j.clnu.2019.03.036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 02/24/2019] [Accepted: 03/26/2019] [Indexed: 01/23/2023]
Abstract
Supplementation of enteral nutrition (EN) by specific amino acids (AAs) has been proposed to prevent muscle protein loss in intensive care unit (ICU) patients. Citrulline (Cit), which has been shown to stimulate muscle protein synthesis in other situations, may be of interest in this setting. Our aim was to assess the effect of Cit in three catabolic models relevant to critical illness: endotoxemia (LPS), traumatic brain injury (TBI), and TBI with infectious complications (TBI-Ec), which are characterized by different alterations in protein homeostasis. Fifty-eight male Sprague-Dawley rats (200-220 g) were randomized to receive a standard diet ad libitum (CON, n = 9) or to undergo catabolic injuries on day 0 (D0, n = 49), and EN (Sondalis HP energy® 290 kcal/kg/d) from day 1 (D1) combined with Cit (2 g/kg/d) or isonitrogenous non-essential AAs (NEAAs) until day 3 (D3). Endotoxemia was induced by IP injection of LPS from E. coli (3 mg/kg), TBI by hydraulic percussion, and infectious complications (TBI-Ec) by administration of luminescent E. coli on D1. Nitrogen balance (ΔN) and 3-methylhistidine (3-MHis) were measured daily. Muscle protein synthesis (MPS, measured by the SUnSET method) and mTORC1 activation (S6K-1 and 4E-BP1 phosphorylation) were measured on D3 2 h after the arrest of enteral nutrition in soleus, extensor digitorum longus (EDL), gastrocnemius and tibialis muscles. ΔN was lower (p < 0.001) in all three models of injury compared with basal and CON from D1 to D3, and more negative in the LPS-CIT (p < 0.05) than in the LPS group. The 3-MHis/creatinine ratio was significantly increased on D1 in all groups compared with CON, and on D2 only in the LPS and TBI groups (p < 0.0001, LPS and TBI vs. CON). MPS was similar in all groups in soleus and tibialis but significantly higher in EDL in LPS-CIT [LPS-CIT: 4.5 ± 1.7 (mean ± SD) vs. CON: 2.3 ± 1.2; and vs. LPS-NEAA: 3.1 ± 2.3] and in gastrocnemius (LPS-CIT vs. CON; p = 0.05). S6K-1 phosphorylation in the EDL was also higher in LPS-CIT vs. CON (LPS-CIT: 0.94 ± 0.51 CON: 0.42 ± 0.28), but not in gastrocnemius. IL-6 plasma level was significantly higher in all the catabolic groups vs. CON (p < 0.005) with no difference between treatments (Cit or NEAAs). In conclusion, the TBI model showed only a rise in muscle proteolysis, whereas the LPS model displayed a rise in both protein synthesis and proteolysis. Secondly, our results show that the Cit effect varies according to the type of injury and to the muscle under study. The stimulation of MPS rate and the mTOR pathway in LPS-treated rats contrasts with degraded ΔN, suggesting that the Cit effect on protein metabolism in critically ill rats is limited at the whole-body level.
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Affiliation(s)
- O Kuçi
- Laboratoire de Biologie de la Nutrition, EA 4466 PRETRAM, Université Paris Descartes, Sorbonne Paris Cité, France
| | - D Verlaan
- Laboratoire de Biologie de la Nutrition, EA 4466 PRETRAM, Université Paris Descartes, Sorbonne Paris Cité, France
| | - C Vicente
- Laboratoire de Biologie de la Nutrition, EA 4466 PRETRAM, Université Paris Descartes, Sorbonne Paris Cité, France
| | - E Nubret
- Laboratoire de Biologie de la Nutrition, EA 4466 PRETRAM, Université Paris Descartes, Sorbonne Paris Cité, France
| | - S Le Plenier
- Laboratoire de Biologie de la Nutrition, EA 4466 PRETRAM, Université Paris Descartes, Sorbonne Paris Cité, France
| | - J P De Bandt
- Laboratoire de Biologie de la Nutrition, EA 4466 PRETRAM, Université Paris Descartes, Sorbonne Paris Cité, France; Service de Biochimie, Hôpital Cochin, HUPC, AP-HP, Paris, France
| | - L Cynober
- Laboratoire de Biologie de la Nutrition, EA 4466 PRETRAM, Université Paris Descartes, Sorbonne Paris Cité, France; Service de Biochimie, Hôpital Cochin, HUPC, AP-HP, Paris, France.
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Ridwan R, Razak HRA, Adenan MI, Saad WMM. Supplementation of 100% Flesh Watermelon [ Citrullus lanatus (Thunb.) Matsum. and Nakai] Juice Improves Swimming Performance in Rats. Prev Nutr Food Sci 2019; 24:41-48. [PMID: 31008095 PMCID: PMC6456243 DOI: 10.3746/pnf.2019.24.1.41] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 12/17/2018] [Indexed: 11/28/2022] Open
Abstract
Nutritional intervention of fruit juice supplementation is able to maximize exercise performance. Watermelon [Citrullus lanatus (Thunb.) Matsum. and Nakai] contains high L-citrulline content and consumption of watermelon juice may promote ergogenic effects. The aim of the present study was to investigate the role of 100% flesh watermelon juice and 100% rind watermelon juice supplementation for 14 days on swimming performance in rats. Twenty four male Sprague-Dawley rats were randomly divided into four groups: Cx group of rats supplemented with filtered tap water (negative control), L-cit group of rats supplemented with L-citrulline (positive control), FR group of rats supplemented with 100% flesh watermelon juice, and RR group of rats supplemented with 100% rind watermelon juice. Each group was supplemented for 14 days ad libitum prior to swimming exercise protocol. The rats were performed swimming exercise for 3 days and swimming time until exhaustion was measured. Plasma samples were collected to measure lactate concentration, ammonia concentration, and nitric oxide production. Rats supplemented with 100% flesh watermelon juice demonstrated significantly prolonged of swimming time until exhaustion, reduction of lactate and ammonia concentrations, and increased of nitric oxide production compared to Cx and L-cit groups (P<0.05). These findings postulate that supplementation with 100% flesh watermelon juice improves endurance in swimming performance.
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Affiliation(s)
- Rasdin Ridwan
- Centre of Medical Laboratory Technology, Faculty of Health Sciences, Universiti Teknologi MARA, Selangor 42300, Malaysia
| | | | - Mohd Ilham Adenan
- Faculty of Applied Sciences, Universiti Teknologi MARA, Selangor 42300, Malaysia.,Atta-ur-Rahman Institute for Natural Product Discovery, Universiti Teknologi MARA, Selangor 42300, Malaysia
| | - Wan Mazlina Md Saad
- Centre of Medical Laboratory Technology, Faculty of Health Sciences, Universiti Teknologi MARA, Selangor 42300, Malaysia
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Lynch GS, Koopman R. Overcoming nature’s paradox in skeletal muscle to optimise animal production. ANIMAL PRODUCTION SCIENCE 2019. [DOI: 10.1071/an19361] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Nature’s paradox in skeletal muscle describes the seemingly mutually exclusive relationship between muscle fibre size and oxidative capacity. In mammals, there is a constraint on the size at which mitochondria-rich, high O2-dependent oxidative fibres can attain before they become anoxic or adapt to a glycolytic phenotype, being less reliant on O2. This implies that a muscle fibre can hypertrophy at the expense of its endurance capacity. Adaptations to activity (exercise) generally obey this relationship, with optimal muscle endurance generally being linked to an enhanced proportion of small, slow oxidative fibres and muscle strength (force and/or power) being linked to an enhanced proportion of large, fast glycolytic fibres. This relationship generally constrains not only the physiological limits of performance (e.g. speed and endurance), but also the capacity to manipulate muscle attributes such as fibre size and composition, with important relevance to the livestock and aquaculture industries for producing specific muscle traits such as (flesh) quality, texture and taste. Highly glycolytic (white) muscles have different traits than do highly oxidative (red) muscles and so the ability to manipulate muscle attributes to produce flesh with specific traits has important implications for optimising meat production and quality. Understanding the biological regulation of muscle size, and phenotype and the capacity to manipulate signalling pathways to produce specific attributes, has important implications for promoting ethically sustainable and profitable commercial livestock and aquaculture practices and for developing alternative food sources, including ‘laboratory meat’ or ‘clean meat’. This review describes the exciting potential of manipulating muscle attributes relevant to animal production, through traditional nutritional and pharmacological approaches and through viral-mediated strategies that could theoretically push the limits of muscle fibre growth, adaptation and plasticity.
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Hong MY, Beidler J, Hooshmand S, Figueroa A, Kern M. Watermelon and l-arginine consumption improve serum lipid profile and reduce inflammation and oxidative stress by altering gene expression in rats fed an atherogenic diet. Nutr Res 2018; 58:46-54. [PMID: 30340814 DOI: 10.1016/j.nutres.2018.06.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 05/31/2018] [Accepted: 06/27/2018] [Indexed: 12/15/2022]
Abstract
Watermelon (Citrullus lanatus) is rich in l-citrulline, an l-arginine precursor that may reduce cardiovascular disease risk. The purpose of this study was to compare the effects of watermelon powder and l-arginine on lipid profiles, antioxidant capacity, and inflammation in rats fed an atherogenic diet. We hypothesized that watermelon and l-arginine would increase antioxidant capacity and reduce blood lipids and inflammation by modulating hepatic gene expression. Male Sprague-Dawley rats aged 21 days (N = 32) were assigned to 3 groups and fed diets containing watermelon powder (0.5% wt/wt), l-arginine (0.3% as 0.36% l-arginine HCl wt/wt), or a control diet for 9 weeks. Watermelon and l-arginine supplementation improved lipid profiles by lowering serum concentrations of triglycerides, total cholesterol, and low-density lipoprotein cholesterol (P < .050). Serum concentrations of C-reactive protein were significantly lower (P < .050) in the watermelon and l-arginine groups. Rats in the watermelon and l-arginine groups showed reduced oxidative stress, increased total antioxidant capacity, and higher concentrations of superoxide dismutase and glutathione S-transferase (P < .050). Concentrations of aspartate aminotransferase, alkaline phosphatase, and lactate dehydrogenase were lower (P < .050) in the watermelon and l-arginine groups. Watermelon and l-arginine consumption upregulated hepatic gene expression of endothelial nitric oxide synthase and downregulated expression of fatty acid synthase, 3-hydroxy-3-methylglutaryl-CoA reductase, sterol regulatory element-binding protein 1, sterol regulatory element-binding protein 2, cyclooxygenase-2, and nuclear factor-κB p65 (P < .050). The results support the hypothesis that watermelon and arginine improve cardiovascular disease risk factors including lipid profile, antioxidant capacity, and inflammation by altering relevant gene expression.
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Affiliation(s)
- Mee Young Hong
- School of Exercise and Nutritional Sciences, San Diego State University, San Diego, CA 92182.
| | - Joshua Beidler
- School of Exercise and Nutritional Sciences, San Diego State University, San Diego, CA 92182
| | - Shirin Hooshmand
- School of Exercise and Nutritional Sciences, San Diego State University, San Diego, CA 92182
| | - Arturo Figueroa
- Department of Kinesiology and Sport Management, Texas Tech University, Lubbock, TX 79403
| | - Mark Kern
- School of Exercise and Nutritional Sciences, San Diego State University, San Diego, CA 92182
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Caldwell RW, Rodriguez PC, Toque HA, Narayanan SP, Caldwell RB. Arginase: A Multifaceted Enzyme Important in Health and Disease. Physiol Rev 2018; 98:641-665. [PMID: 29412048 PMCID: PMC5966718 DOI: 10.1152/physrev.00037.2016] [Citation(s) in RCA: 253] [Impact Index Per Article: 42.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 08/14/2017] [Accepted: 08/17/2017] [Indexed: 12/15/2022] Open
Abstract
The arginase enzyme developed in early life forms and was maintained during evolution. As the last step in the urea cycle, arginase cleaves l-arginine to form urea and l-ornithine. The urea cycle provides protection against excess ammonia, while l-ornithine is needed for cell proliferation, collagen formation, and other physiological functions. In mammals, increases in arginase activity have been linked to dysfunction and pathologies of the cardiovascular system, kidney, and central nervous system and also to dysfunction of the immune system and cancer. Two important aspects of the excessive activity of arginase may be involved in diseases. First, overly active arginase can reduce the supply of l-arginine needed for the production of nitric oxide (NO) by NO synthase. Second, too much l-ornithine can lead to structural problems in the vasculature, neuronal toxicity, and abnormal growth of tumor cells. Seminal studies have demonstrated that increased formation of reactive oxygen species and key inflammatory mediators promote this pathological elevation of arginase activity. Here, we review the involvement of arginase in diseases affecting the cardiovascular, renal, and central nervous system and cancer and discuss the value of therapies targeting the elevated activity of arginase.
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Affiliation(s)
- R William Caldwell
- Department of Pharmacology & Toxicology, Vision Discovery Institute, Department of Medicine-Hematology and Oncology, Department of Occupational Therapy, School of Allied Health Sciences, and Vascular Biology Center, Medical College of Georgia, Augusta University , Augusta, Georgia ; and VA Medical Center, Augusta, Georgia
| | - Paulo C Rodriguez
- Department of Pharmacology & Toxicology, Vision Discovery Institute, Department of Medicine-Hematology and Oncology, Department of Occupational Therapy, School of Allied Health Sciences, and Vascular Biology Center, Medical College of Georgia, Augusta University , Augusta, Georgia ; and VA Medical Center, Augusta, Georgia
| | - Haroldo A Toque
- Department of Pharmacology & Toxicology, Vision Discovery Institute, Department of Medicine-Hematology and Oncology, Department of Occupational Therapy, School of Allied Health Sciences, and Vascular Biology Center, Medical College of Georgia, Augusta University , Augusta, Georgia ; and VA Medical Center, Augusta, Georgia
| | - S Priya Narayanan
- Department of Pharmacology & Toxicology, Vision Discovery Institute, Department of Medicine-Hematology and Oncology, Department of Occupational Therapy, School of Allied Health Sciences, and Vascular Biology Center, Medical College of Georgia, Augusta University , Augusta, Georgia ; and VA Medical Center, Augusta, Georgia
| | - Ruth B Caldwell
- Department of Pharmacology & Toxicology, Vision Discovery Institute, Department of Medicine-Hematology and Oncology, Department of Occupational Therapy, School of Allied Health Sciences, and Vascular Biology Center, Medical College of Georgia, Augusta University , Augusta, Georgia ; and VA Medical Center, Augusta, Georgia
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Abdelkawy KS, Lack K, Elbarbry F. Pharmacokinetics and Pharmacodynamics of Promising Arginase Inhibitors. Eur J Drug Metab Pharmacokinet 2018; 42:355-370. [PMID: 27734327 DOI: 10.1007/s13318-016-0381-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Up-regulation of arginase activity in several chronic disease conditions, including cancer and hypertension, may suggest new targets for treatment. Recently, the number of new arginase inhibitors with promising therapeutic effects for asthma, cancer, hypertension, diabetes mellitus, and erectile dysfunction has shown a remarkable increase. Arginase inhibitors may be chemical substances, such as boron-based amino acid derivatives, α-difluoromethylornithine (DMFO), and Nω-hydroxy-nor-L-arginine (nor-NOHA) or, of plant origin such as sauchinone, salvianolic acid B (SAB), piceatannol-3-O-β-D-glucopyranoside (PG) and obacunone. Despite their promising therapeutic potential, little is known about pharmacokinetics and pharmacodynamics of some of these agents. Several studies were conducted in different animal species and in vitro systems and reported significant differences in pharmacokinetics and pharmacodynamics of arginase inhibitors. Therefore, extra caution should be considered before extrapolating these studies to human. Physicochemical and pharmacokinetic profiles of some effective arginase inhibitors make it challenging to formulate stable and effective formulation. In this article, existing literature on the pharmacokinetics and pharmacodynamics of arginase inhibitors were reviewed and compared together with emphasis on possible drug interactions and solutions to overcome pharmacokinetics challenges and shortage of arginase inhibitors in clinical practice.
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Affiliation(s)
| | - Kelsey Lack
- School of Pharmacy, Pacific University, 222 SE 8th Ave., Hillsboro, OR, 97123, USA
| | - Fawzy Elbarbry
- School of Pharmacy, Pacific University, 222 SE 8th Ave., Hillsboro, OR, 97123, USA.
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Albaugh VL, Mukherjee K, Barbul A. Proline Precursors and Collagen Synthesis: Biochemical Challenges of Nutrient Supplementation and Wound Healing. J Nutr 2017; 147:2011-2017. [PMID: 28978679 PMCID: PMC5657141 DOI: 10.3945/jn.117.256404] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 08/03/2017] [Accepted: 08/30/2017] [Indexed: 12/25/2022] Open
Abstract
Wound healing is a complex process marked by highly coordinated immune fluxes into an area of tissue injury; these are required for re-establishment of normal tissue integrity. Along with this cascade of cellular players, wound healing also requires coordinated flux through a number of biochemical pathways, leading to synthesis of collagen and recycling or removal of damaged tissues. The availability of nutrients, especially amino acids, is critical for wound healing, and enteral supplementation has been intensely studied as a potential mechanism to augment wound healing-either by increasing tensile strength, decreasing healing time, or both. From a practical standpoint, although enteral nutrient supplementation may seem like a reasonable strategy to augment healing, a number of biochemical and physiologic barriers exist that limit this strategy. In this critical review, the physiology of enteral amino acid metabolism and supplementation and challenges therein are discussed in the context of splanchnic physiology and biochemistry. Additionally, a review of studies examining various methods of amino acid supplementation and the associated effects on wound outcomes are discussed.
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Affiliation(s)
- Vance L Albaugh
- Division of General Surgery, Department of Surgery, Vanderbilt University School of Medicine, Nashville, TN; and
| | - Kaushik Mukherjee
- Division of Acute Care Surgery, Loma Linda University School of Medicine, Loma Linda, CA
| | - Adrian Barbul
- Division of General Surgery, Department of Surgery, Vanderbilt University School of Medicine, Nashville, TN; and
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Citrulline decreases hepatic endotoxin-induced injury in fructose-induced non-alcoholic liver disease: anex vivostudy in the isolated perfused rat liver. Br J Nutr 2017. [DOI: 10.1017/s0007114517001453] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
AbstractSteatosis can sensitise the liver to various challenges and favour the development of non-alcoholic fatty liver disease (NAFLD). In this context, fructose feeding promotes endotoxin translocation from the gut, contributing to disease progression via an inflammatory process. Citrulline is protective against fructose-induced NAFLD; we hypothesised that this property might be related to its anti-inflammatory and antioxidative action against endotoxin-induced hepatic injuries. This hypothesis was evaluated in a model of perfused liver isolated from NAFLD rats. Male Sprague–Dawley rats (n30) were fed either a standard rodent chow or a 60 % fructose diet alone, or supplemented with citrulline (1 g/kg per d) for 4 weeks. After an evaluation of their metabolic status, fasted rats received an intraperitoneal injection of lipopolysaccharide (LPS) (2·5 mg/kg). After 1 h, the livers were isolated and perfused for 1 h to study liver function and metabolism, inflammation and oxidative status.In vivo, citrulline significantly decreased dyslipidaemia induced by a high-fructose diet and insulin resistance. In the isolated perfused rat livers, endotoxaemia resulted in higher cytolysis (alanine aminotransferase release) and higher inflammation (Toll-like receptor 4) in livers of fructose-fed rats, and it was prevented by citrulline supplementation. Oxidative stress and antioxidative defences were similar in all three groups. Amino acid exchanges and metabolism (ammonia and urea release) were only slightly different between the three groups. In this context of mild steatosis, our results suggest that fructose-induced NAFLD leads to an increased hepatic sensitivity to LPS-induced inflammation. Citrulline-induced restriction of the inflammatory process may thus contribute to the prevention of NAFLD.
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43
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Is OM-3 synergistic with GLP-2 in intestinal failure? J Surg Res 2017; 207:7-12. [DOI: 10.1016/j.jss.2016.08.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Revised: 07/12/2016] [Accepted: 08/03/2016] [Indexed: 12/12/2022]
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Lai CH, Lee CH, Hung CY, Lo HC. Oral Citrulline Mitigates Inflammation and Jejunal Damage via the Inactivation of Neuronal Nitric Oxide Synthase and Nuclear Factor-κB in Intestinal Ischemia and Reperfusion. JPEN J Parenter Enteral Nutr 2016; 41:422-435. [PMID: 26129897 DOI: 10.1177/0148607115590661] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND Intestinal ischemia and reperfusion (I/R) is a life-threatening emergency accompanied by inflammation and organ damage. We compared the mechanisms and the effects of arginine, citrulline, and glutamine on inflammation and intestinal damage. MATERIALS AND METHODS Male Wistar rats underwent 60 minutes of superior mesenteric artery occlusion and either 3 (I/R3) or 24 (I/R24) hours of reperfusion and were orally administered vehicle, arginine, citrulline, or glutamine 15 minutes before reperfusion and at 3, 9, and 21 hours of reperfusion. RESULTS I/R3 rats experienced jejunal damage and apoptosis, and I/R24 rats had liver dysfunction compared with normal rats (one-way ANOVA, P < .05). Arginine and citrulline administrations improved jejunal morphology, and citrulline and glutamine administrations alleviated the loss of jejunal mass in I/R3 rats. I/R3-increased circulating nitrate/nitrite (NOx), tumor necrosis factor-α, and interleukin-6 were significantly decreased by citrulline, glutamine and citrulline, and arginine, glutamine, and citrulline, respectively. These amino acids decreased plasma NOx and interferon-γ in I/R24, decreased jejunal neuronal nitric oxide synthase (NOS) protein in I/R3 rats, and alleviated jejunal apoptosis in I/R3 and I/R24 rats. In addition, the jejunal phosphorylated to total nuclear factor-κB (NF-κB) ratio was decreased by arginine and citrulline in I/R24 rats. CONCLUSION Oral administration of arginine, citrulline, and glutamine may alleviate systemic inflammation, jejunal apoptosis, and neuronal NOS in intestinal I/R. Citrulline may further attenuate jejunal damage by preserving jejunal mass, partially via the inactivation of NOS and the NF-κB pathway. In conclusion, oral citrulline may have more benefits than arginine and glutamine in mitigating intestinal ischemia and reperfusion-induced adverse effects.
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Affiliation(s)
- Chun-Hong Lai
- 1 Department of Nutrition, Chi-Mei Medical Center, Tainan, Taiwan
| | - Chien-Hsing Lee
- 2 Division of Pediatric Surgery, Department of Surgery, Children's Hospital of China Medical University, Taichung, Taiwan.,3 Graduate Institute of Medical Sciences, Chang Jung Christian University, Tainan, Taiwan
| | - Ching-Yi Hung
- 2 Division of Pediatric Surgery, Department of Surgery, Children's Hospital of China Medical University, Taichung, Taiwan
| | - Hui-Chen Lo
- 4 Department of Nutritional Science, Fu Jen Catholic University, New Taipei City, Taiwan
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Bailey SJ, Blackwell JR, Williams E, Vanhatalo A, Wylie LJ, Winyard PG, Jones AM. Two weeks of watermelon juice supplementation improves nitric oxide bioavailability but not endurance exercise performance in humans. Nitric Oxide 2016; 59:10-20. [DOI: 10.1016/j.niox.2016.06.008] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Accepted: 06/29/2016] [Indexed: 02/08/2023]
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46
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Hafner P, Bonati U, Rubino D, Gocheva V, Zumbrunn T, Gueven N, Fischer D. Treatment with L-citrulline and metformin in Duchenne muscular dystrophy: study protocol for a single-centre, randomised, placebo-controlled trial. Trials 2016; 17:389. [PMID: 27488051 PMCID: PMC4973063 DOI: 10.1186/s13063-016-1503-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Accepted: 07/17/2016] [Indexed: 12/19/2022] Open
Abstract
Background Duchenne muscular dystrophy (DMD) is an X-linked recessive disease that affects 1 in 3500–6000 male births. Despite broad research aiming to improve muscle function as well as heart and brain function, sufficient therapeutic efficacy has not yet been achieved and current therapeutic management is still supportive. In a recent pilot trial, oral treatment with l-arginine and metformin showed consistent changes of muscular metabolism both in vitro and in vivo by raising NO levels and expression of mitochondrial proteins in the skeletal muscle tissue of patients with DMD. This randomised, double-blind, placebo-controlled trial aims to demonstrate the superiority of l-citrulline and metformin therapy over placebo in DMD patients with regard to the Motor Function Measure (MFM) D1 subscore (primary endpoint) as well as additional clinical and subclinical tests. Methods/Design A total of 40–50 ambulant patients with DMD will be recruited at the outpatient department of the University of Basel Children’s Hospital (Switzerland), as well as from the DMD patient registries of Switzerland, Germany and Austria. Patients will be randomly allocated to one of the two arms of the study and will receive either a combination of l-citrulline and metformin or placebo for 26 weeks. Co-medication with glucocorticoids is allowed. The primary endpoint is the change of the MFM D1 subscore from baseline to week 26 under l-citrulline and metformin therapy. Secondary endpoints will include the motor function measure (MFM) and its items and subscores, the 6-minute walking test, timed function tests and quantitative muscle testing. Furthermore, quantitative muscle MRI assessment to evaluate the muscle fat fraction as well as safety and biomarker laboratory analyses from blood will be included. For comparison, muscle metabolism and mitochondrial function will be analysed in 10–20 healthy age-matched male children. Discussion The aim of this study is to test if a 6-month treatment of a combination of l-citrulline and metformin is more effective than placebo in preventing loss of motor function and muscle degeneration in DMD. The MFM D1 subscore is used as a clinical outcome measure and a quantitative muscle MRI assessment as the surrogate outcome measure of fatty muscle degeneration. Trial registration ClinicalTrials.gov: NCT01995032. Registered on 20 November 2013. Electronic supplementary material The online version of this article (doi:10.1186/s13063-016-1503-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Patricia Hafner
- Division of Neuropaediatrics, University of Basel Children's Hospital, Basel, Switzerland. .,Division of Neurology, Medical University Clinic, Kantonsspital Baselland, Bruderholz, Switzerland. .,Division of Neuropaediatrics, University Children's Hospital, Spitalstrasse 33, Postfach, Basel, 4056, Switzerland.
| | - Ulrike Bonati
- Division of Neuropaediatrics, University of Basel Children's Hospital, Basel, Switzerland
| | - Daniela Rubino
- Division of Neuropaediatrics, University of Basel Children's Hospital, Basel, Switzerland
| | - Vanya Gocheva
- Division of Neuropaediatrics, University of Basel Children's Hospital, Basel, Switzerland
| | - Thomas Zumbrunn
- Department of Clinical research, Clinical Trial Unit, University of Basel Hospital, Basel, Switzerland
| | - Nuri Gueven
- Pharmacy, School of Medicine, University of Tasmania, Hobart, TAS, Australia
| | - Dirk Fischer
- Division of Neuropaediatrics, University of Basel Children's Hospital, Basel, Switzerland.,Division of Neurology, Medical University Clinic, Kantonsspital Baselland, Bruderholz, Switzerland.,Department of Neurology, University of Basel Hospital, Basel, Switzerland
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Preventive effects of citrulline on Western diet-induced non-alcoholic fatty liver disease in rats. Br J Nutr 2016; 116:191-203. [PMID: 27197843 DOI: 10.1017/s0007114516001793] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A Western diet induces insulin resistance, liver steatosis (non-alcoholic fatty liver disease (NAFLD)) and intestinal dysbiosis, leading to increased gut permeability and bacterial translocation, thus contributing to the progression of NAFLD to non-alcoholic steatohepatitis. In the present study, we sought, in a model of Western diet-induced NAFLD, to determine whether citrulline (Cit), an amino acid that regulates protein and energy metabolism, could decrease Western diet-induced liver injuries, as well as the mechanisms involved. Sprague-Dawley rats were fed a high-fat diet (45 %) and fructose (30 %) in drinking water or a control diet associated with water (group C) for 8 weeks. The high-fat, high-fructose diet (Western diet) was fed either alone (group WD) or with Cit (1 g/kg per d) (group WDC) or an isonitrogenous amount of non-essential amino acids (group WDA). We evaluated nutritional and metabolic status, liver function, intestinal barrier function, gut microbiota and splanchnic inflammatory status. Cit led to a lower level of hepatic TAG restricted to microvesicular lipid droplets and to a lower mRNA expression of CCAAT-enhancer-binding protein homologous protein, a marker of endoplasmic reticulum stress, of pro-inflammatory cytokines Il6 (P<0·05) and Tnfα, and of toll-like receptor 4 (Tlr4) (P<0·05). Cit also improved plasma TAG and insulin levels. In the colon, it decreased inflammation (Tnfα and Tlr4 expressions) and increased claudin-1 protein expression. This was associated with higher levels of Bacteroides/Prevotella compared with rats fed the Western diet alone. Cit improves Western diet-induced liver injuries via decreased lipid deposition, increased insulin sensitivity, lower inflammatory process and preserved antioxidant status. This may be related in part to its protective effects at the gut level.
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Bourgoin-Voillard S, Goron A, Seve M, Moinard C. Regulation of the proteome by amino acids. Proteomics 2016; 16:831-46. [DOI: 10.1002/pmic.201500347] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 12/30/2015] [Accepted: 01/12/2016] [Indexed: 12/14/2022]
Affiliation(s)
- Sandrine Bourgoin-Voillard
- Plateforme de Protéomique PROMETHEE; IAB; University Grenoble Alpes; Grenoble France
- Plateforme de Protéomique PROMETHEE, Institut de Biologie et de Pathologie; CHU de Grenoble; Grenoble France
- Plateforme de Protéomique PROMETHEE; IAB; INSERM; Grenoble France
| | - Arthur Goron
- Laboratory of Fundamental and Applied Bioenergetics (LBFA); University Grenoble Alpes; Grenoble France
- Laboratory of Fundamental and Applied Bioenergetics (LBFA); INSERM; Grenoble France
| | - Michel Seve
- Plateforme de Protéomique PROMETHEE; IAB; University Grenoble Alpes; Grenoble France
- Plateforme de Protéomique PROMETHEE, Institut de Biologie et de Pathologie; CHU de Grenoble; Grenoble France
- Plateforme de Protéomique PROMETHEE; IAB; INSERM; Grenoble France
| | - Christophe Moinard
- Laboratory of Fundamental and Applied Bioenergetics (LBFA); University Grenoble Alpes; Grenoble France
- Laboratory of Fundamental and Applied Bioenergetics (LBFA); INSERM; Grenoble France
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Bourdon A, Parnet P, Nowak C, Tran NT, Winer N, Darmaun D. L-Citrulline Supplementation Enhances Fetal Growth and Protein Synthesis in Rats with Intrauterine Growth Restriction. J Nutr 2016; 146:532-41. [PMID: 26865647 DOI: 10.3945/jn.115.221267] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Accepted: 01/04/2016] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Intrauterine growth restriction (IUGR) results from either maternal undernutrition or impaired placental blood flow, exposing offspring to increased perinatal mortality and a higher risk of metabolic syndrome and cardiovascular disease during adulthood. l-Citrulline is a precursor of l-arginine and nitric oxide (NO), which regulates placental blood flow. Moreover, l-citrulline stimulates protein synthesis in other models of undernutrition. OBJECTIVE The aim of the study was to determine whether l-citrulline supplementation would enhance fetal growth in a model of IUGR induced by maternal dietary protein restriction. METHODS Pregnant rats were fed either a control (20% protein) or a low-protein (LP; 4% protein) diet. LP dams were randomly allocated to drink tap water either as such or supplemented with l-citrulline (2 g · kg(-1) · d(-1)), an isonitrogenous amount of l-arginine, or nonessential l-amino acids (NEAAs). On day 21 of gestation, dams received a 2-h infusion of l-[1-(13)C]-valine until fetuses were extracted by cesarean delivery. Isotope enrichments were measured in free amino acids and fetal muscle, liver, and placenta protein by GC-mass spectrometry. RESULTS Fetal weight was ∼29% lower in the LP group (3.82 ± 0.06 g) than in the control group (5.41 ± 0.10 g) (P < 0.001). Regardless of supplementation, fetal weight remained below that of control fetuses. Yet, compared with the LP group, l-citrulline and l-arginine equally increased fetal weight to 4.15 ± 0.08 g (P < 0.05) and 4.13 ± 0.1 g (P < 0.05 compared with LP), respectively, whereas NEAA did not (4.05 ± 0.05 g; P = 0.07). Fetal muscle protein fractional synthesis rate was 35% lower in the LP fetuses (41% ± 11%/d) than in the control (61% ± 13%/d) fetuses (P < 0.001) and was normalized by l-citrulline (56% ± 4%/d; P < 0.05 compared with LP, NS compared with control) and not by other supplements. Urinary nitrite and nitrate excretion was lower in the LP group (6.4 ± 0.8 μmol/d) than in the control group (17.9 ± 1.1 μmol/d; P < 0.001) and increased in response to l-citrulline or l-arginine (12.1 ± 2.2 and 10.6 ± 0.9 μmol/d; P < 0.05), whereas they did not in the LP + NEAA group. CONCLUSION l-Citrulline increases fetal growth in a model of IUGR, and the effect may be mediated by enhanced fetal muscle protein synthesis and/or increased NO production.
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Affiliation(s)
- Aurélie Bourdon
- National Institute of Agricultural Research (INRA), Joint Research Unit (UMR 1280), Physiology of Nutritional Adaptations, University of Nantes, Institute for Diseases of the Digestive System (IMAD), and Western Human Nutrition Research Center (CRNH), Nantes, France
| | - Patricia Parnet
- National Institute of Agricultural Research (INRA), Joint Research Unit (UMR 1280), Physiology of Nutritional Adaptations, University of Nantes, Institute for Diseases of the Digestive System (IMAD), and Western Human Nutrition Research Center (CRNH), Nantes, France
| | - Christel Nowak
- National Institute of Agricultural Research (INRA), Joint Research Unit (UMR 1280), Physiology of Nutritional Adaptations, University of Nantes, Institute for Diseases of the Digestive System (IMAD), and Western Human Nutrition Research Center (CRNH), Nantes, France; Department of Gynecology and Obstetrics, University Medical Center of Nantes, Nantes, France; and
| | - Nhat-Thang Tran
- National Institute of Agricultural Research (INRA), Joint Research Unit (UMR 1280), Physiology of Nutritional Adaptations, University of Nantes, Institute for Diseases of the Digestive System (IMAD), and Western Human Nutrition Research Center (CRNH), Nantes, France
| | - Norbert Winer
- National Institute of Agricultural Research (INRA), Joint Research Unit (UMR 1280), Physiology of Nutritional Adaptations, University of Nantes, Institute for Diseases of the Digestive System (IMAD), and Western Human Nutrition Research Center (CRNH), Nantes, France; Department of Gynecology and Obstetrics, University Medical Center of Nantes, Nantes, France; and
| | - Dominique Darmaun
- National Institute of Agricultural Research (INRA), Joint Research Unit (UMR 1280), Physiology of Nutritional Adaptations, University of Nantes, Institute for Diseases of the Digestive System (IMAD), and Western Human Nutrition Research Center (CRNH), Nantes, France; Nutrition Support Team, IMAD, University Medical Center of Nantes, Nantes, France
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Abstract
Arginine (ARG) and its precursor citrulline (CIT) are popular dietary supplements, especially for the elderly. However, age-related reductions in lean body mass and alterations in organ functions could change their bioavailability. Pharmacokinetics and tolerance to amino acid (AA) loads are poorly documented in elderly subjects. The objective here was to characterise the plasma kinetics of CIT and ARG in a single-dosing study design. Eight fasting elderly men underwent two separate isomolar oral loading tests (10 g of CIT or 9·94 g of ARG). Blood was withdrawn over an 8-h period to measure plasma AA concentrations. Only CIT, ornithine and ARG plasma concentrations were changed. Volume of distribution was not dependent on AA administered. Conversely, parameters related to ARG kinetics were strongly dependent on AA administered: after ARG load, elimination was higher (ARG>CIT; P=0·041) and admission period+time at peak concentration was lower (ARG<CIT; P=0·033), and the combination of both phenomena results in a marked increase in ARG availability when CIT was administered (ARG<CIT; P=0·033) compared with ARG administration itself. In conclusion, a single CIT administration in the elderly is safe and well tolerated, and CIT proves to be a better in vivo ARG precursor than ARG itself in healthy elderly subjects.
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