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Trillos-Almanza MC, Chvatal-Medina M, Connelly MA, Moshage H, Bakker SJL, de Meijer VE, Blokzijl H, Dullaart RPF. Circulating Trimethylamine-N-Oxide Is Elevated in Liver Transplant Recipients. Int J Mol Sci 2024; 25:6031. [PMID: 38892218 PMCID: PMC11172608 DOI: 10.3390/ijms25116031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 05/28/2024] [Accepted: 05/29/2024] [Indexed: 06/21/2024] Open
Abstract
Liver transplant recipients (LTRs) have lower long-term survival rates compared with the general population. This underscores the necessity for developing biomarkers to assess post-transplantation mortality. Here we compared plasma trimethylamine-N-oxide (TMAO) levels with those in the general population, investigated its determinants, and interrogated its association with all-cause mortality in stable LTRs. Plasma TMAO was measured in 367 stable LTRs from the TransplantLines cohort (NCT03272841) and in 4837 participants from the population-based PREVEND cohort. TMAO levels were 35% higher in LTRs compared with PREVEND participants (4.3 vs. 3.2 µmol/L, p < 0.001). Specifically, TMAO was elevated in LTRs with metabolic dysfunction-associated steatotic liver disease, alcohol-associated liver disease, and polycystic liver disease as underlying etiology (p < 0.001 for each). Among LTRs, TMAO levels were independently associated with eGFR (std. β = -0.43, p < 0.001) and iron supplementation (std. β = 0.13, p = 0.008), and were associated with mortality (29 deaths during 8.6 years follow-up; log-rank test p = 0.017; hazard ratio of highest vs. lowest tertile 4.14, p = 0.007). In conclusion, plasma TMAO is likely elevated in stable LTRs, with impaired eGFR and iron supplementation as potential contributory factors. Our preliminary findings raise the possibility that plasma TMAO could contribute to increased mortality risk in such patients, but this need to be validated through a series of rigorous and methodical studies.
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Affiliation(s)
- Maria Camila Trillos-Almanza
- Department of Gastroenterology and Hepatology, University Medical Center Groningen, University of Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands; (M.C.-M.); (H.M.); (H.B.)
| | - Mateo Chvatal-Medina
- Department of Gastroenterology and Hepatology, University Medical Center Groningen, University of Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands; (M.C.-M.); (H.M.); (H.B.)
| | | | - Han Moshage
- Department of Gastroenterology and Hepatology, University Medical Center Groningen, University of Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands; (M.C.-M.); (H.M.); (H.B.)
| | - TransplantLines Investigators
- Groningen Institute for Organ Transplantation, University Medical Center Groningen, University of Groningen, 9700 AD Groningen, The Netherlands;
| | - Stephan J. L. Bakker
- Department of Internal Medicine, Division of Nephrology, University Medical Center Groningen, University of Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands;
| | - Vincent E. de Meijer
- Department of Surgery, Division of Hepato-Pancreato-Biliary Surgery and Liver Transplantation, University Medical Center Groningen, University of Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands;
| | - Hans Blokzijl
- Department of Gastroenterology and Hepatology, University Medical Center Groningen, University of Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands; (M.C.-M.); (H.M.); (H.B.)
| | - Robin P. F. Dullaart
- Department of Internal Medicine, Division of Endocrinology, University Medical Center Groningen, University of Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands;
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Nenna A, Laudisio A, Taffon C, Fogolari M, Spadaccio C, Ferrisi C, Loreni F, Giacinto O, Mastroianni C, Barbato R, Rose D, Salsano A, Santini F, Angeletti S, Crescenzi A, Antonelli Incalzi R, Chello M, Lusini M. Intestinal Microbiota and Derived Metabolites in Myocardial Fibrosis and Postoperative Atrial Fibrillation. Int J Mol Sci 2024; 25:6037. [PMID: 38892223 PMCID: PMC11173100 DOI: 10.3390/ijms25116037] [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: 05/01/2024] [Revised: 05/25/2024] [Accepted: 05/29/2024] [Indexed: 06/21/2024] Open
Abstract
The high incidence of atrial fibrillation (AFib) following cardiac surgery (postoperative atrial fibrillation, POAF) relies on specific surgical features. However, in the setting of POAF, the role of the microbiome in the modulation of cardiac fibrosis is still not clear. This study aimed to analyze the effect of the microbiome and its main metabolic product (trimethylamine-N-oxide, TMAO) in the fibrosis of myocardial tissue, to investigate its role in POAF. Patients undergoing elective cardiac surgery with cardiopulmonary bypass, central atrio-caval cannulation and no history of AFib, were included. A fragment of the right atrium was analyzed for qualitative and mRNA-quantitative evaluation. A preoperative blood sample was analyzed with enzyme-linked immunosorbent assay (ELISA). A total of 100 patients have been included, with POAF occurring in 38%. Histologically, a higher degree of fibrosis, angiogenesis and inflammation has been observed in POAF. Quantitative evaluation showed increased mRNA expression of collagen-1, collagen-3, fibronectin, and transforming growth factor beta (TGFb) in the POAF group. ELISA analysis showed higher levels of TMAO, lipopolysaccharide and TGFb in POAF, with similar levels of sP-selectin and zonulin. TMAO ≥ 61.8 ng/mL (odds ratio, OR 2.88 [1.35-6.16], p = 0.006), preoperative hemoglobin < 13.1 g/dL (OR 2.37 [1.07-5.24], p = 0.033) and impaired right ventricular function (OR 2.38 [1.17-4.83], p = 0.017) were independent predictors of POAF. Also, TMAO was significantly associated with POAF by means of increased fibrosis. Gut microbiome product TMAO is crucial for myocardial fibrosis, which is a key factor for POAF. Patients in preoperative sinus rhythm who will develop POAF have increased genetic expression of pro-fibrotic genes and enhanced fibrosis in histological staining. Elevated TMAO level (≥61.8 ng/mL) is an independent risk factor for POAF.
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Affiliation(s)
- Antonio Nenna
- Cardiac Surgery, Fondazione Policlinico Universitario Campus Bio-Medico, Via Alvaro del Portillo 200, 00128 Rome, Italy; (C.F.); (F.L.); (O.G.); (C.M.); (R.B.); (M.C.); (M.L.)
| | - Alice Laudisio
- Internal Medicine, Fondazione Policlinico Universitario Campus Bio-Medico, 00128 Rome, Italy; (A.L.); (R.A.I.)
| | - Chiara Taffon
- Pathology, Fondazione Policlinico Universitario Campus Bio-Medico, 00128 Rome, Italy; (C.T.); (A.C.)
| | - Marta Fogolari
- Clinical Laboratory, Fondazione Policlinico Universitario Campus Bio-Medico, 00128 Rome, Italy; (M.F.); (S.A.)
| | - Cristiano Spadaccio
- Cardiac Surgery, University of Cincinnati Medical Center, Cincinnati, OH 45219, USA;
- Cardiothoracic Surgery, Lancashire Cardiac Centre, Blackpool Teaching Hospital, Blackpool FY3 8NP, UK;
| | - Chiara Ferrisi
- Cardiac Surgery, Fondazione Policlinico Universitario Campus Bio-Medico, Via Alvaro del Portillo 200, 00128 Rome, Italy; (C.F.); (F.L.); (O.G.); (C.M.); (R.B.); (M.C.); (M.L.)
| | - Francesco Loreni
- Cardiac Surgery, Fondazione Policlinico Universitario Campus Bio-Medico, Via Alvaro del Portillo 200, 00128 Rome, Italy; (C.F.); (F.L.); (O.G.); (C.M.); (R.B.); (M.C.); (M.L.)
| | - Omar Giacinto
- Cardiac Surgery, Fondazione Policlinico Universitario Campus Bio-Medico, Via Alvaro del Portillo 200, 00128 Rome, Italy; (C.F.); (F.L.); (O.G.); (C.M.); (R.B.); (M.C.); (M.L.)
| | - Ciro Mastroianni
- Cardiac Surgery, Fondazione Policlinico Universitario Campus Bio-Medico, Via Alvaro del Portillo 200, 00128 Rome, Italy; (C.F.); (F.L.); (O.G.); (C.M.); (R.B.); (M.C.); (M.L.)
| | - Raffaele Barbato
- Cardiac Surgery, Fondazione Policlinico Universitario Campus Bio-Medico, Via Alvaro del Portillo 200, 00128 Rome, Italy; (C.F.); (F.L.); (O.G.); (C.M.); (R.B.); (M.C.); (M.L.)
| | - David Rose
- Cardiothoracic Surgery, Lancashire Cardiac Centre, Blackpool Teaching Hospital, Blackpool FY3 8NP, UK;
| | - Antonio Salsano
- Cardiac Surgery, Ospedale Policlinico San Martino, University of Genoa, 16126 Genoa, Italy; (A.S.); (F.S.)
| | - Francesco Santini
- Cardiac Surgery, Ospedale Policlinico San Martino, University of Genoa, 16126 Genoa, Italy; (A.S.); (F.S.)
| | - Silvia Angeletti
- Clinical Laboratory, Fondazione Policlinico Universitario Campus Bio-Medico, 00128 Rome, Italy; (M.F.); (S.A.)
| | - Anna Crescenzi
- Pathology, Fondazione Policlinico Universitario Campus Bio-Medico, 00128 Rome, Italy; (C.T.); (A.C.)
| | - Raffaele Antonelli Incalzi
- Internal Medicine, Fondazione Policlinico Universitario Campus Bio-Medico, 00128 Rome, Italy; (A.L.); (R.A.I.)
| | - Massimo Chello
- Cardiac Surgery, Fondazione Policlinico Universitario Campus Bio-Medico, Via Alvaro del Portillo 200, 00128 Rome, Italy; (C.F.); (F.L.); (O.G.); (C.M.); (R.B.); (M.C.); (M.L.)
| | - Mario Lusini
- Cardiac Surgery, Fondazione Policlinico Universitario Campus Bio-Medico, Via Alvaro del Portillo 200, 00128 Rome, Italy; (C.F.); (F.L.); (O.G.); (C.M.); (R.B.); (M.C.); (M.L.)
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Yuzefpolskaya M, Bohn B, Ladanyi A, Khoruts A, Colombo PC, Demmer RT. Oral and gut microbiome alterations in heart failure: Epidemiology, pathogenesis and response to advanced heart failure therapies. J Heart Lung Transplant 2023; 42:291-300. [PMID: 36586790 DOI: 10.1016/j.healun.2022.12.009] [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: 09/27/2022] [Revised: 11/18/2022] [Accepted: 12/09/2022] [Indexed: 12/23/2022] Open
Abstract
Despite significant advances in therapies, heart failure (HF) remains a progressive disease that, once advanced, is associated with significant death and disability. Cardiac replacement therapies with left ventricular assist device (LVAD) and heart transplantation (HT) are the only treatment options for advanced HF, while lifesaving they can also be lifespan limiting due to the associated complications. Systemic inflammation is mechanistically important in HF pathophysiology and progression. However, directly targeting inflammation in HF has not been beneficial thus far. These failed attempts at therapeutics might be related to our limited understanding of the factors that cause inflammation in HF, and, therefore, to our inability to investigate these triggers in interventional studies. Observational studies have consistently demonstrated associations between alterations in the digestive (gut and oral) microbiome, inflammation and HF risk and progression. Additionally, recent data indicate that these microbial perturbations persist following LVAD and HT, along with residual inflammation and oxidative stress. Furthermore, there is rising recognition of the critical contribution of the microbiome to the metabolism of immunosuppressive drugs after HT. Cumulatively, these findings might posit a mechanistic link between microbiome alterations, systemic inflammation, and adverse outcomes in HF patients before and after cardiac replacement therapies. This review (1) provides an update on available data linking changes in digestive tract microbiota, inflammation, and oxidative stress, to HF pathogenesis and progression; (2) describes evolution of these relationships following LVAD and HT; and (3) outlines present and future intervention strategies that can manipulate the microbiome and possibly modify HF disease trajectory.
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Affiliation(s)
- Melana Yuzefpolskaya
- Division of Cardiovascular Medicine, Columbia University Irving Medical Center, New York City, New York.
| | - Bruno Bohn
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, Minnesota
| | - Annamaria Ladanyi
- Division of Cardiovascular Medicine, Columbia University Irving Medical Center, New York City, New York
| | - Alexander Khoruts
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine University of Minnesota, Minneapolis, Minnesota
| | - Paolo C Colombo
- Division of Cardiovascular Medicine, Columbia University Irving Medical Center, New York City, New York
| | - Ryan T Demmer
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, Minnesota; Division of Epidemiology, Mailman School of Public Health, Columbia University Irving Medical Center, New York, New York
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Choi HI, Kang DY, Kim MS, Lee SE, Ahn JM, Lee JY, Kim YH, Park DW, Jung SH, Kim JJ. Long-term efficacy of everolimus as de novo immunosuppressant on the cardiac allograft vasculopathy in heart transplant recipients. Atherosclerosis 2022; 357:1-8. [PMID: 35981436 DOI: 10.1016/j.atherosclerosis.2022.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 07/14/2022] [Accepted: 08/05/2022] [Indexed: 11/25/2022]
Abstract
BACKGROUND AND AIMS Data on the long-term effects of everolimus (EVL) on the de novo immunosuppression of heart transplant (HT) recipients with progressive cardiac allograft vasculopathy (CAV) and vascular remodeling are lacking. Hence, in this study, we aimed to determine the long-term safety and efficacy of EVL as a de novo immunosuppressant therapy for CAV progression and the clinical outcomes after HT. METHODS We retrospectively reviewed the medical records of 144 HT recipients who survived for at least one year after HT. CAV progression was assessed via serial coronary intravascular ultrasonography (IVUS) in recipients who underwent at least two IVUS studies. RESULTS A significant attenuation in the percentage of the atheroma volume progression was observed in those who took EVL (1.2%) compared with those who took cyclosporin (CSA; 7.3%; p = 0.005 vs. EVL) or tacrolimus (TAC; 6.6%; p = 0.0052 vs. EVL) at 1 year after HT. This trend persisted for the next 3 and 5 years after HT. Moreover, the remodeling index was greater in the EVL (1.08) group than in the CSA (0.23) or TAC (-0.25) groups 1 year after HT. The results of the Kaplan-Meier analysis over a median follow-up period of 8 years revealed that there was no statistical difference in the primary endpoint between the three groups. CONCLUSIONS De novo immunosuppression with EVL is associated with attenuated CAV progression for the first 5 years of follow-up via IVUS. Moreover, EVL has comparable long-term clinical outcomes to those of CSA- or TAC-based protocols.
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Affiliation(s)
- Hyo-In Choi
- Division of Cardiology, Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University College of Medicine, Seoul, 03181, South Korea
| | - Do-Yoon Kang
- Division of Cardiology, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, 05505, South Korea
| | - Min-Seok Kim
- Division of Cardiology, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, 05505, South Korea
| | - Sang Eun Lee
- Division of Cardiology, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, 05505, South Korea
| | - Jung-Min Ahn
- Division of Cardiology, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, 05505, South Korea
| | - Jong-Young Lee
- Division of Cardiology, Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University College of Medicine, Seoul, 03181, South Korea
| | - Yong-Hak Kim
- Division of Cardiology, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, 05505, South Korea
| | - Duk-Woo Park
- Division of Cardiology, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, 05505, South Korea
| | - Sung-Ho Jung
- Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, 05505, South Korea
| | - Jae-Joong Kim
- Division of Cardiology, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, 05505, South Korea.
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Xu J, Zhao M, Wang A, Xue J, Cheng S, Cheng A, Gao J, Zhang Q, Zhan R, Meng X, Xu M, Li H, Zheng L, Wang Y. Association Between Plasma Trimethyllysine and Prognosis of Patients With Ischemic Stroke. J Am Heart Assoc 2021; 10:e020979. [PMID: 34816729 PMCID: PMC9075360 DOI: 10.1161/jaha.121.020979] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Background Trimethyllysine, a trimethylamine N‐oxide precursor, has been identified as an independent cardiovascular risk factor in acute coronary syndrome. However, limited data are available to examine the role of trimethyllysine in the population with stroke. We aimed to examine the relationship between plasma trimethyllysine levels and stroke outcomes in patients presenting with ischemic stroke or transient ischemic attack. Methods and Results Data of 10 027 patients with ischemic stroke/transient ischemic attack from the CNSR‐III (Third China National Stroke Registry) and 1‐year follow‐up data for stroke outcomes were analyzed. Plasma levels of trimethyllysine were measured with mass spectrometry. The association between trimethyllysine and stroke outcomes was analyzed using Cox regression models. Mediation analysis was performed to examine the mediation effects of risk factors on the associations of trimethyllysine and stroke outcomes. Elevated trimethyllysine levels were associated with increased risk of cardiovascular death (quartile 4 versus quartile 1: adjusted hazard ratio [HR], 1.72; 95% CI, 1.03–2.86) and all‐cause mortality (quartile 4 versus quartile 1: HR, 1.97; 95% CI, 1.40–2.78) in multivariate Cox regression model. However, no associations were found between trimethyllysine and nonfatal stroke recurrence or nonfatal myocardial infarction. Trimethyllysine was associated with cardiovascular death independent of trimethylamine N‐oxide. Both estimated glomerular filtration rate and hs‐CRP (high‐sensitivity C‐reactive protein) had significant mediation effects on the association of trimethyllysine with cardiovascular death, with a mediation effect of 37.8% and 13.4%, respectively. Conclusions Elevated trimethyllysine level is associated with cardiovascular death among patients with ischemic stroke/transient ischemic attack. Mediation analyses propose that trimethyllysine contributes to cardiovascular death through inflammation and renal function, suggesting a possible pathomechanistic link.
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Affiliation(s)
- Jie Xu
- Department of Neurology, Beijing Tiantan Hospital China National Clinical Research Center for Neurological Diseases Advanced Innovation Center for Human Brain Protection The Capital Medical University Beijing China
| | - Mingming Zhao
- The Institute of Cardiovascular Sciences and Institute of Systems Biomedicine, School of Basic Medical Sciences Key Laboratory of Molecular Cardiovascular Sciences of Ministry of Education, Health Science Center Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides of Ministry of Health Beijing Key Laboratory of Cardiovascular Receptors Research Peking University Beijing China
| | - Anxin Wang
- Department of Neurology, Beijing Tiantan Hospital China National Clinical Research Center for Neurological Diseases Advanced Innovation Center for Human Brain Protection The Capital Medical University Beijing China
| | - Jing Xue
- Department of Neurology, Beijing Tiantan Hospital China National Clinical Research Center for Neurological Diseases Advanced Innovation Center for Human Brain Protection The Capital Medical University Beijing China
| | - Si Cheng
- Department of Neurology, Beijing Tiantan Hospital China National Clinical Research Center for Neurological Diseases Advanced Innovation Center for Human Brain Protection The Capital Medical University Beijing China
| | - Aichun Cheng
- Department of Neurology, Beijing Tiantan Hospital China National Clinical Research Center for Neurological Diseases Advanced Innovation Center for Human Brain Protection The Capital Medical University Beijing China
| | - Jianing Gao
- The Institute of Cardiovascular Sciences and Institute of Systems Biomedicine, School of Basic Medical Sciences Key Laboratory of Molecular Cardiovascular Sciences of Ministry of Education, Health Science Center Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides of Ministry of Health Beijing Key Laboratory of Cardiovascular Receptors Research Peking University Beijing China
| | - Qi Zhang
- The Institute of Cardiovascular Sciences and Institute of Systems Biomedicine, School of Basic Medical Sciences Key Laboratory of Molecular Cardiovascular Sciences of Ministry of Education, Health Science Center Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides of Ministry of Health Beijing Key Laboratory of Cardiovascular Receptors Research Peking University Beijing China
| | - Rui Zhan
- The Institute of Cardiovascular Sciences and Institute of Systems Biomedicine, School of Basic Medical Sciences Key Laboratory of Molecular Cardiovascular Sciences of Ministry of Education, Health Science Center Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides of Ministry of Health Beijing Key Laboratory of Cardiovascular Receptors Research Peking University Beijing China
| | - Xia Meng
- Department of Neurology, Beijing Tiantan Hospital China National Clinical Research Center for Neurological Diseases Advanced Innovation Center for Human Brain Protection The Capital Medical University Beijing China
| | - Ming Xu
- Department of Cardiology and Institute of Vascular Medicine Peking University Third Hospital Beijing China
| | - Hao Li
- Department of Neurology, Beijing Tiantan Hospital China National Clinical Research Center for Neurological Diseases Advanced Innovation Center for Human Brain Protection The Capital Medical University Beijing China
| | - Lemin Zheng
- Department of Neurology, Beijing Tiantan Hospital China National Clinical Research Center for Neurological Diseases Advanced Innovation Center for Human Brain Protection The Capital Medical University Beijing China.,The Institute of Cardiovascular Sciences and Institute of Systems Biomedicine, School of Basic Medical Sciences Key Laboratory of Molecular Cardiovascular Sciences of Ministry of Education, Health Science Center Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides of Ministry of Health Beijing Key Laboratory of Cardiovascular Receptors Research Peking University Beijing China
| | - Yongjun Wang
- Department of Neurology, Beijing Tiantan Hospital China National Clinical Research Center for Neurological Diseases Advanced Innovation Center for Human Brain Protection The Capital Medical University Beijing China
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Bai YZ, Roberts SH, Kreisel D, Nava RG. Microbiota in heart and lung transplantation: implications for innate-adaptive immune interface. Curr Opin Organ Transplant 2021; 26:609-614. [PMID: 34561360 DOI: 10.1097/mot.0000000000000923] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
PURPOSE OF REVIEW Transplantation continues to be the only treatment option for end-stage organ failure when other interventions have failed. Although short-term outcomes have improved due to advances in perioperative care, long-term outcomes continue to be adversely affected by chronic rejection. Little is known about the role microbiota play in modulating alloimmune responses and potentially contributing to graft failure. Initial data have identified a correlation between specific changes of the recipient and/or donor microbiota and transplant outcomes. In this review, we will focus on recent findings concerning the complex interplay between microbiota and the innate immune system after heart and lung transplantation. RECENT FINDINGS Gut microbiome derangements in heart failure promote an inflammatory state and have lasting effects on the innate immune system, with an observed association between increased levels of microbiota-dependent metabolites and acute rejection after cardiac transplantation. The lung allograft microbiome interacts with components of the innate immune system, such as toll-like receptor signalling pathways, NKG2C+ natural killer cells and the NLRP3 inflammasome, to alter posttransplant outcomes, which may result in the development of chronic rejection. SUMMARY The innate immune system is influenced by alterations in the microbiome before and after heart and lung transplantation, thereby offering potential therapeutic targets for prolonging allograft survival.
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Affiliation(s)
| | | | - Daniel Kreisel
- Department of Surgery
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, Missouri, USA
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The MttB superfamily member MtyB from the human gut symbiont Eubacterium limosum is a cobalamin-dependent γ-butyrobetaine methyltransferase. J Biol Chem 2021; 297:101327. [PMID: 34688665 PMCID: PMC8604678 DOI: 10.1016/j.jbc.2021.101327] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 10/05/2021] [Accepted: 10/06/2021] [Indexed: 12/12/2022] Open
Abstract
The production of trimethylamine (TMA) from quaternary amines such as l-carnitine or γ-butyrobetaine (4-(trimethylammonio)butanoate) by gut microbial enzymes has been linked to heart disease. This has led to interest in enzymes of the gut microbiome that might ameliorate net TMA production, such as members of the MttB superfamily of proteins, which can demethylate TMA (e.g., MttB) or l-carnitine (e.g., MtcB). Here, we show that the human gut acetogen Eubacterium limosum demethylates γ-butyrobetaine and produces MtyB, a previously uncharacterized MttB superfamily member catalyzing the demethylation of γ-butyrobetaine. Proteomic analyses of E. limosum grown on either γ-butyrobetaine or dl-lactate were employed to identify candidate proteins underlying catabolic demethylation of the growth substrate. Three proteins were significantly elevated in abundance in γ-butyrobetaine-grown cells: MtyB, MtqC (a corrinoid-binding protein), and MtqA (a corrinoid:tetrahydrofolate methyltransferase). Together, these proteins act as a γ-butyrobetaine:tetrahydrofolate methyltransferase system, forming a key intermediate of acetogenesis. Recombinant MtyB acts as a γ-butyrobetaine:MtqC methyltransferase but cannot methylate free cobalamin cofactor. MtyB is very similar to MtcB, the carnitine methyltransferase, but neither was detectable in cells grown on carnitine nor was detectable in cells grown with γ-butyrobetaine. Both quaternary amines are substrates for either enzyme, but kinetic analysis revealed that, in comparison to MtcB, MtyB has a lower apparent Km for γ-butyrobetaine and higher apparent Vmax, providing a rationale for MtyB abundance in γ-butyrobetaine-grown cells. As TMA is readily produced from γ-butyrobetaine, organisms with MtyB-like proteins may provide a means to lower levels of TMA and proatherogenic TMA-N-oxide via precursor competition.
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Yuzefpolskaya M, Bohn B, Javaid A, Mondellini GM, Braghieri L, Pinsino A, Onat D, Cagliostro B, Kim A, Takeda K, Naka Y, Farr M, Sayer GT, Uriel N, Nandakumar R, Mohan S, Colombo PC, Demmer RT. Levels of Trimethylamine N-Oxide Remain Elevated Long Term After Left Ventricular Assist Device and Heart Transplantation and Are Independent From Measures of Inflammation and Gut Dysbiosis. Circ Heart Fail 2021; 14:e007909. [PMID: 34129361 DOI: 10.1161/circheartfailure.120.007909] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Trimethylamine N-oxide (TMAO)-a gut-derived metabolite-is elevated in heart failure (HF) and linked to poor prognosis. We investigated variations in TMAO in HF, left ventricular assist device (LVAD), and heart transplant (HT) and assessed its relation with inflammation, endotoxemia, oxidative stress, and gut dysbiosis. METHODS We enrolled 341 patients. TMAO, CRP (C-reactive protein), IL (interleukin)-6, TNF-α (tumor necrosis factor alpha), ET-1 (endothelin-1), adiponectin, lipopolysaccharide, soluble CD14, and isoprostane were measured in 611 blood samples in HF (New York Heart Association class I-IV) and at multiple time points post-LVAD and post-HT. Gut microbiota were assessed via 16S rRNA sequencing among 327 stool samples. Multivariable regression models were used to assess the relationship between TMAO and (1) New York Heart Association class; (2) pre- versus post-LVAD or post-HT; (3) biomarkers of inflammation, endotoxemia, oxidative stress, and microbial diversity. RESULTS ln-TMAO was lower among HF New York Heart Association class I (1.23 [95% CI, 0.52-1.94] µM) versus either class II, III, or IV (1.99 [95% CI, 1.68-2.30], 1.97 [95% CI, 1.71-2.24], and 2.09 [95% CI, 1.83-2.34] µM, respectively; all P<0.05). In comparison to class II-IV, ln-TMAO was lower 1 month post-LVAD (1.58 [95% CI, 1.32-1.83] µM) and 1 week and 1 month post-HT (0.97 [95% CI, 0.60-1.35] and 1.36 [95% CI, 1.01-1.70] µM). ln-TMAO levels in long-term LVAD (>6 months: 1.99 [95% CI, 1.76-2.22] µM) and HT (>6 months: 1.86 [95% CI, 1.66-2.05] µM) were not different from symptomatic HF. After multivariable adjustments, TMAO was not associated with biomarkers of inflammation, endotoxemia, oxidative stress, or microbial diversity. CONCLUSIONS TMAO levels are increased in symptomatic HF patients and remain elevated long term after LVAD and HT. TMAO levels were independent from measures of inflammation, endotoxemia, oxidative stress, and gut dysbiosis.
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Affiliation(s)
- Melana Yuzefpolskaya
- Department of Medicine, Division of Cardiology (M.Y., A.J., G.M.M., L.B., A.P., D.O., A.K., M.F., G.T.S., N.U., P.C.C.), Columbia University Irving Medical Center, New York, NY
| | - Bruno Bohn
- Biomarkers Core Laboratory, Division of Epidemiology and Community Health, University of Minnesota, Minneapolis (B.B., R.T.D.)
| | - Azka Javaid
- Department of Medicine, Division of Cardiology (M.Y., A.J., G.M.M., L.B., A.P., D.O., A.K., M.F., G.T.S., N.U., P.C.C.), Columbia University Irving Medical Center, New York, NY
| | - Giulio M Mondellini
- Department of Medicine, Division of Cardiology (M.Y., A.J., G.M.M., L.B., A.P., D.O., A.K., M.F., G.T.S., N.U., P.C.C.), Columbia University Irving Medical Center, New York, NY
| | - Lorenzo Braghieri
- Department of Medicine, Division of Cardiology (M.Y., A.J., G.M.M., L.B., A.P., D.O., A.K., M.F., G.T.S., N.U., P.C.C.), Columbia University Irving Medical Center, New York, NY
| | - Alberto Pinsino
- Department of Medicine, Division of Cardiology (M.Y., A.J., G.M.M., L.B., A.P., D.O., A.K., M.F., G.T.S., N.U., P.C.C.), Columbia University Irving Medical Center, New York, NY
| | - Duygu Onat
- Department of Medicine, Division of Cardiology (M.Y., A.J., G.M.M., L.B., A.P., D.O., A.K., M.F., G.T.S., N.U., P.C.C.), Columbia University Irving Medical Center, New York, NY
| | - Barbara Cagliostro
- Dpartment of Surgery, Division of Cardiac Surgery (B.C., K.T., Y.N.), Columbia University Irving Medical Center, New York, NY
| | - Andrea Kim
- Department of Medicine, Division of Cardiology (M.Y., A.J., G.M.M., L.B., A.P., D.O., A.K., M.F., G.T.S., N.U., P.C.C.), Columbia University Irving Medical Center, New York, NY
| | - Koji Takeda
- Dpartment of Surgery, Division of Cardiac Surgery (B.C., K.T., Y.N.), Columbia University Irving Medical Center, New York, NY
| | - Yoshifumi Naka
- Dpartment of Surgery, Division of Cardiac Surgery (B.C., K.T., Y.N.), Columbia University Irving Medical Center, New York, NY
| | - Maryjane Farr
- Department of Medicine, Division of Cardiology (M.Y., A.J., G.M.M., L.B., A.P., D.O., A.K., M.F., G.T.S., N.U., P.C.C.), Columbia University Irving Medical Center, New York, NY
| | - Gabriel T Sayer
- Department of Medicine, Division of Cardiology (M.Y., A.J., G.M.M., L.B., A.P., D.O., A.K., M.F., G.T.S., N.U., P.C.C.), Columbia University Irving Medical Center, New York, NY
| | - Nir Uriel
- Department of Medicine, Division of Cardiology (M.Y., A.J., G.M.M., L.B., A.P., D.O., A.K., M.F., G.T.S., N.U., P.C.C.), Columbia University Irving Medical Center, New York, NY
| | - Renu Nandakumar
- Biomarkers Core Laboratory, Irving Institute for Clinical and Translational Research (R.N.)
| | - Sumit Mohan
- Department of Medicine, Division of Nephrology (S.M.), Columbia University Irving Medical Center, New York, NY.,Department of Epidemiology, Mailman School of Public Health (S.M., R.T.D.), Columbia University Irving Medical Center, New York, NY
| | - Paolo C Colombo
- Department of Medicine, Division of Cardiology (M.Y., A.J., G.M.M., L.B., A.P., D.O., A.K., M.F., G.T.S., N.U., P.C.C.), Columbia University Irving Medical Center, New York, NY
| | - Ryan T Demmer
- Department of Epidemiology, Mailman School of Public Health (S.M., R.T.D.), Columbia University Irving Medical Center, New York, NY.,Biomarkers Core Laboratory, Division of Epidemiology and Community Health, University of Minnesota, Minneapolis (B.B., R.T.D.)
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9
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Gut Microbiome and Precision Nutrition in Heart Failure: Hype or Hope? Curr Heart Fail Rep 2021; 18:23-32. [DOI: 10.1007/s11897-021-00503-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/21/2021] [Indexed: 02/06/2023]
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10
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Zhang Y, Wang Y, Ke B, Du J. TMAO: how gut microbiota contributes to heart failure. Transl Res 2021; 228:109-125. [PMID: 32841736 DOI: 10.1016/j.trsl.2020.08.007] [Citation(s) in RCA: 103] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 08/04/2020] [Accepted: 08/17/2020] [Indexed: 12/19/2022]
Abstract
An increasing amount of evidence reveals that the gut microbiota is involved in the pathogenesis and progression of various cardiovascular diseases. In patients with heart failure (HF), splanchnic hypoperfusion causes ischemia and intestinal edema, allowing bacterial translocation and bacterial metabolites to enter the blood circulation via an impaired intestinal barrier. This results in local and systemic inflammatory responses. Gut microbe-derived metabolites are implicated in the pathology of multiple diseases, including HF. These landmark findings suggest that gut microbiota influences the host's metabolic health, either directly or indirectly by producing several metabolites. In this review, we mainly discuss a newly identified gut microbiota-dependent metabolite, trimethylamine N-oxide (TMAO), which appears to participate in the pathologic processes of HF and can serve as an early warning marker to identify individuals who are at the risk of disease progression. We also discuss the potential of the gut-TMAO-HF axis as a new target for HF treatment and highlight the current controversies and potentially new and exciting directions for future research.
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Affiliation(s)
- Yixin Zhang
- Beijing Anzhen Hospital, Capital Medical University, Key Laboratory of Remodeling-Related Cardiovascular Diseases, Ministry of Education, Beijing Collaborative Innovation Center for Cardiovascular Disorders, Beijing, China; Beijing Institute of Heart, Lung and Blood Vessel Disease, Beijing, China
| | - Yuan Wang
- Beijing Anzhen Hospital, Capital Medical University, Key Laboratory of Remodeling-Related Cardiovascular Diseases, Ministry of Education, Beijing Collaborative Innovation Center for Cardiovascular Disorders, Beijing, China; Beijing Institute of Heart, Lung and Blood Vessel Disease, Beijing, China
| | - Bingbing Ke
- Beijing Anzhen Hospital, Capital Medical University, Key Laboratory of Remodeling-Related Cardiovascular Diseases, Ministry of Education, Beijing Collaborative Innovation Center for Cardiovascular Disorders, Beijing, China; Beijing Institute of Heart, Lung and Blood Vessel Disease, Beijing, China
| | - Jie Du
- Beijing Anzhen Hospital, Capital Medical University, Key Laboratory of Remodeling-Related Cardiovascular Diseases, Ministry of Education, Beijing Collaborative Innovation Center for Cardiovascular Disorders, Beijing, China; Beijing Institute of Heart, Lung and Blood Vessel Disease, Beijing, China.
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11
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Ho KM, Kalgudi S, Corbett JM, Litton E. Gut microbiota in surgical and critically ill patients. Anaesth Intensive Care 2020; 48:179-195. [PMID: 32131606 DOI: 10.1177/0310057x20903732] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Microbiota-defined as a collection of microbial organisms colonising different parts of the human body-is now recognised as a pivotal element of human health, and explains a large part of the variance in the phenotypic expression of many diseases. A reduction in microbiota diversity, and replacement of normal microbes with non-commensal, pathogenic or more virulent microbes in the gastrointestinal tract-also known as gut dysbiosis-is now considered to play a causal role in the pathogenesis of many acute and chronic diseases. Results from animal and human studies suggest that dysbiosis is linked to cardiovascular and metabolic disease through changes to microbiota-derived metabolites, including trimethylamine-N-oxide and short-chain fatty acids. Dysbiosis can occur within hours of surgery or the onset of critical illness, even without the administration of antibiotics. These pathological changes in microbiota may contribute to important clinical outcomes, including surgical infection, bowel anastomotic leaks, acute kidney injury, respiratory failure and brain injury. As a strategy to reduce dysbiosis, the use of probiotics (live bacterial cultures that confer health benefits) or synbiotics (probiotic in combination with food that encourages the growth of gut commensal bacteria) in surgical and critically ill patients has been increasingly reported to confer important clinical benefits, including a reduction in ventilator-associated pneumonia, bacteraemia and length of hospital stay, in small randomised controlled trials. However, the best strategy to modulate dysbiosis or counteract its potential harms remains uncertain and requires investigation by a well-designed, adequately powered, randomised controlled trial.
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Affiliation(s)
- Kwok M Ho
- Department of Intensive Care Medicine, Royal Perth Hospital, Perth, Australia.,School of Veterinary and Life Sciences, Murdoch University, Perth, Australia.,Medical School, University of Western Australia, Perth, Australia
| | - Shankar Kalgudi
- Department of Intensive Care Medicine, Royal Perth Hospital, Perth, Australia
| | - Jade-Marie Corbett
- Department of Intensive Care Medicine, Royal Perth Hospital, Perth, Australia
| | - Edward Litton
- Medical School, University of Western Australia, Perth, Australia.,Department of Intensive Care Medicine, Fiona Stanley Hospital, Murdoch, Australia
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12
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Trøseid M, Andersen GØ, Broch K, Hov JR. The gut microbiome in coronary artery disease and heart failure: Current knowledge and future directions. EBioMedicine 2020; 52:102649. [PMID: 32062353 PMCID: PMC7016372 DOI: 10.1016/j.ebiom.2020.102649] [Citation(s) in RCA: 175] [Impact Index Per Article: 43.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 01/17/2020] [Accepted: 01/18/2020] [Indexed: 12/12/2022] Open
Abstract
Host-microbiota interactions involving inflammatory and metabolic pathways have been linked to the pathogenesis of multiple immune-mediated diseases and metabolic conditions like diabetes and obesity. Accumulating evidence suggests that alterations in the gut microbiome could play a role in cardiovascular disease. This review focuses on recent advances in our understanding of the interplay between diet, gut microbiota and cardiovascular disease, with emphasis on heart failure and coronary artery disease. Whereas much of the literature has focused on the circulating levels of the diet- and microbiota-dependent metabolite trimethylamine-N-oxide (TMAO), several recent sequencing-based studies have demonstrated compositional and functional alterations in the gut microbiomes in both diseases. Some microbiota characteristics are consistent across several study cohorts, such as a decreased abundance of microbes with capacity for producing butyrate. However, the published gut microbiota studies generally lack essential covariates like diet and clinical data, are too small to capture the substantial variation in the gut microbiome, and lack parallel plasma samples, limiting the ability to translate the functional capacity of the gut microbiomes to actual function reflected by circulating microbiota-related metabolites. This review attempts to give directions for future studies in order to demonstrate clinical utility of the gut-heart axis.
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Affiliation(s)
- Marius Trøseid
- Research Institute of Internal Medicine, Sognsvannsveien 20, 0027 Oslo, Norway; Section of Clinical Immunology and Infectious diseases, Norway; Institute of Clinical Medicine, University of Oslo, Norway.
| | | | - Kaspar Broch
- Department of Cardiology, Oslo University Hospital Rikshospitalet, Norway
| | - Johannes Roksund Hov
- Research Institute of Internal Medicine, Sognsvannsveien 20, 0027 Oslo, Norway; Institute of Clinical Medicine, University of Oslo, Norway; Norwegian PSC Research Center, Norway; Section of Gastroenterology, Oslo University Hospital Rikshospitalet, Norway
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13
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Busnelli M, Manzini S, Chiesa G. The Gut Microbiota Affects Host Pathophysiology as an Endocrine Organ: A Focus on Cardiovascular Disease. Nutrients 2019; 12:nu12010079. [PMID: 31892152 PMCID: PMC7019666 DOI: 10.3390/nu12010079] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 12/18/2019] [Accepted: 12/24/2019] [Indexed: 12/12/2022] Open
Abstract
It is widely recognized that the microorganisms inhabiting our gastrointestinal tract-the gut microbiota-deeply affect the pathophysiology of the host. Gut microbiota composition is mostly modulated by diet, and gut microorganisms communicate with the different organs and tissues of the human host by synthesizing hormones and regulating their release. Herein, we will provide an updated review on the most important classes of gut microbiota-derived hormones and their sensing by host receptors, critically discussing their impact on host physiology. Additionally, the debated interplay between microbial hormones and the development of cardiovascular disease will be thoroughly analysed and discussed.
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14
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Increased Trimethylamine N-Oxide Is Not Associated with Oxidative Stress Markers in Healthy Aged Women. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:6247169. [PMID: 31636806 PMCID: PMC6766136 DOI: 10.1155/2019/6247169] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 08/02/2019] [Accepted: 08/16/2019] [Indexed: 12/16/2022]
Abstract
Increased plasma trimethylamine N-oxide (TMAO) levels have been associated with cardiovascular diseases (CVD). L-carnitine induces TMAO elevation in human blood, and thus, it has been suggested as developing atherosclerosis. The aim of this study was to determine the relation between selected markers of oxidative stress and plasma TMAO concentration induced by L-carnitine supplementation for 24 weeks in healthy aged women. Twenty aged women were supplemented during 24 weeks with either 1500 mg L-carnitine-L-tartrate (n = 11) or isonitrogenous placebo (n = 9) per day. Fasting blood samples were taken from antecubital vein. L-carnitine supplementation induced an increase in TMAO, but not in γ-butyrobetaine (GBB). Moreover, there were no significant changes in serum ox-LDL, myeloperoxidase, protein carbonyls, homocysteine, and uric acid concentrations due to supplementation. Significant reduction in white blood cell counts has been observed following 24-week supplementation, but not attributable to L-carnitine. Our results in healthy aged women indicated no relation between TMAO and any determined marker of oxidative stress over the period of 24 weeks. At the same time, plasma GBB levels were not affected by L-carnitine supplementation. Further clinical studies of plasma GBB level as a prognostic marker are needed.
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