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Scoglio M, Cappellini MD, D’Angelo E, Bianchetti MG, Lava SAG, Agostoni C, Milani GP. Kidney Tubular Damage Secondary to Deferasirox: Systematic Literature Review. CHILDREN 2021; 8:children8121104. [PMID: 34943300 PMCID: PMC8700300 DOI: 10.3390/children8121104] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 11/26/2021] [Accepted: 11/26/2021] [Indexed: 11/16/2022]
Abstract
Deferasirox is a first-line therapy for iron overload that can sometimes cause kidney damage. To better define the pattern of tubular damage, a systematic literature review was conducted on the United States National Library of Medicine, Excerpta Medica, and Web of Science databases. Twenty-three reports describing 57 individual cases could be included. The majority (n = 35) of the 57 patients were ≤18 years of age and affected by thalassemia (n = 46). Abnormal urinary findings were noted in 54, electrolyte or acid–base abnormalities in 46, and acute kidney injury in 9 patients. Latent tubular damage was diagnosed in 11 (19%), overt kidney tubular damage in 37 (65%), and an acute kidney injury in the remaining nine (16%) patients. Out of the 117 acid–base and electrolyte disorders reported in 48 patients, normal-gap metabolic acidosis and hypophosphatemia were the most frequent. Further abnormalities were, in decreasing order of frequency, hypokalemia, hypouricemia, hypocalcemia, and hyponatremia. Out of the 81 abnormal urinary findings, renal glucosuria was the most frequent, followed by tubular proteinuria, total proteinuria, and aminoaciduria. In conclusion, a proximal tubulopathy pattern may be observed on treatment with deferasirox. Since deferasirox-associated kidney damage is dose-dependent, physicians should prescribe the lowest efficacious dose.
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Affiliation(s)
- Martin Scoglio
- Department of Pediatrics, Pediatric Institute of Southern Switzerland, Ospedale San Giovanni, 6500 Bellinzona, Switzerland; (M.S.); (M.G.B.)
| | - Maria Domenica Cappellini
- Pediatric Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy; (M.D.C.); (E.D.); (C.A.); (G.P.M.)
| | - Emanuela D’Angelo
- Pediatric Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy; (M.D.C.); (E.D.); (C.A.); (G.P.M.)
| | - Mario G. Bianchetti
- Department of Pediatrics, Pediatric Institute of Southern Switzerland, Ospedale San Giovanni, 6500 Bellinzona, Switzerland; (M.S.); (M.G.B.)
| | - Sebastiano A. G. Lava
- Pediatric Cardiology Unit, Department of Pediatrics, Centre Hospitalier Universitaire Vaudois, and University of Lausanne, 1010 Lausanne, Switzerland
- Heart Failure and Transplantation, Department of Pediatric Cardiology, Great Ormond Street Hospital, London WC1N 3JH, UK
- Correspondence:
| | - Carlo Agostoni
- Pediatric Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy; (M.D.C.); (E.D.); (C.A.); (G.P.M.)
- Department of Clinical Sciences and Community Health, Università degli Studi di Milano, 20122 Milan, Italy
| | - Gregorio P. Milani
- Pediatric Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy; (M.D.C.); (E.D.); (C.A.); (G.P.M.)
- Department of Clinical Sciences and Community Health, Università degli Studi di Milano, 20122 Milan, Italy
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Palumbo GA, Galimberti S, Barcellini W, Cilloni D, Di Renzo N, Elli EM, Finelli C, Maurillo L, Ricco A, Musto P, Russo R, Latagliata R. From Biology to Clinical Practice: Iron Chelation Therapy With Deferasirox. Front Oncol 2021; 11:752192. [PMID: 34692534 PMCID: PMC8527180 DOI: 10.3389/fonc.2021.752192] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 09/08/2021] [Indexed: 01/19/2023] Open
Abstract
Iron chelation therapy (ICT) has become a mainstay in heavily transfused hematological patients, with the aim to reduce iron overload (IOL) and prevent organ damage. This therapeutic approach is already widely used in thalassemic patients and in low-risk Myelodysplastic Syndrome (MDS) patients. More recently, ICT has been proposed for high-risk MDS, especially when an allogeneic bone marrow transplantation has been planned. Furthermore, other hematological and hereditary disorders, characterized by considerable transfusion support to manage anemia, could benefit from this therapy. Meanwhile, data accumulated on how iron toxicity could exacerbate anemia and other clinical comorbidities due to oxidative stress radical oxygen species (ROS) mediated by free iron species. Taking all into consideration, together with the availability of approved oral iron chelators, we envision a larger use of ICT in the near future. The aim of this review is to better identify those non-thalassemic patients who can benefit from ICT and give practical tips for management of this therapeutic strategy.
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Affiliation(s)
- Giuseppe A Palumbo
- Department of Scienze Mediche Chirurgiche e Tecnologie Avanzate "G.F. Ingrassia, " University of Catania, Catania, Italy
| | - Sara Galimberti
- Section of Hematology, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Wilma Barcellini
- Hematology, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ca' Granda Ospedale Maggiore Policlinico di Milano and University of Milan, Milan, Italy
| | - Daniela Cilloni
- Department of Clinical and Biological Sciences, University of Turin, Turin, Italy
| | - Nicola Di Renzo
- Hematology and Transplant Unit, Ospedale Vito Fazzi, Lecce, Italy
| | - Elena Maria Elli
- Division of Hematology and Bone Marrow Unit, Ospedale San Gerardo, Aziende Socio Sanitarie Territoriali (ASST), Monza, Italy
| | - Carlo Finelli
- IRCCS Azienda Ospedaliero-Universitaria di Bologna, Istituto di Ematologia "Seràgnoli", Bologna, Italy
| | - Luca Maurillo
- Department of Onco-hematology, Fondazione Policlinico Tor Vergata, Rome, Italy
| | - Alessandra Ricco
- Unit of Hematology and Stem Cell Transplantation, Azienda Ospedaliera Universitaria (AOU) Consorziale Policlinico, Bari, Italy
| | - Pellegrino Musto
- Unit of Hematology and Stem Cell Transplantation, Azienda Ospedaliera Universitaria (AOU) Consorziale Policlinico, Bari, Italy.,Department of Emergency and Organ Transplantation, "Aldo Moro" University School of Medicine, Bari, Italy
| | - Rodolfo Russo
- Clinica Nefrologica, Dialisi e Trapianto, Department of Integrated Medicine with the Territory, IRCCS Ospedale Policlinico San Martino, Genoa, Italy
| | - Roberto Latagliata
- Unità Operativa Complessa (UOC) Ematologia, Ospedale Belcolle, Viterbo and Division of Cellular Biotechnology and Hematology, Sapienza University, Rome, Italy
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Demosthenous C, Vlachaki E, Apostolou C, Eleftheriou P, Kotsiafti A, Vetsiou E, Mandala E, Perifanis V, Sarafidis P. Beta-thalassemia: renal complications and mechanisms: a narrative review. ACTA ACUST UNITED AC 2019; 24:426-438. [PMID: 30947625 DOI: 10.1080/16078454.2019.1599096] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
OBJECTIVES Beta-thalassemias are a group of recessively autosomal inherited disorders of hemoglobin synthesis, which, due to mutations of the beta-globin gene, lead to various degrees of defective beta-chain production, an imbalance in alpha/beta-globin chain synthesis, ineffective erythropoiesis, and anemia. Improved survival in thalassemic patients has led to the emergence of previously unrecognized complications, such as renal disease. METHODS A comprehensive literature review through PubMed was undertaken to summarize the published evidence on the epidemiology and pathophysiology of renal disease in thalassemia. Literature sources published in English since 1990 were searched, using the terms beta-thalassemia, renal disease. RESULTS Renal disease is considered to be the 4th cause of morbidity among patients with transfusion dependent thalassemia. Chronic anemia, hypoxia and iron overload are the main mechanisms implicated in development of renal injury, whereas several studies also suggested a contributive role of iron chelators. DISCUSSION AND CONCLUSION Kidney disease may develop through progressive renal tubular and glomerular damage; thus, its early recognition is important in order to prevent and/or reverse deterioration. This review will provide an insight on the involved mechanisms implicated in kidney disease in thalassemic patients and will discuss the updates on diagnosis and prevention of renal complications in thalassemia.
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Affiliation(s)
- Christos Demosthenous
- a Department of Hematology and HCT Unit , General Hospital of Thessaloniki "George Papanicolaou" , Thessaloniki , Greece
| | - Efthymia Vlachaki
- b Adults Thalassemia Unit, Second Department of Internal Medicine , Aristotle University, Hippokration Hospital , Thessaloniki , Greece
| | - Chrysa Apostolou
- b Adults Thalassemia Unit, Second Department of Internal Medicine , Aristotle University, Hippokration Hospital , Thessaloniki , Greece
| | - Perla Eleftheriou
- c Department of Haematology , University College London , London , UK
| | - Aggeliki Kotsiafti
- b Adults Thalassemia Unit, Second Department of Internal Medicine , Aristotle University, Hippokration Hospital , Thessaloniki , Greece
| | - Evangelia Vetsiou
- b Adults Thalassemia Unit, Second Department of Internal Medicine , Aristotle University, Hippokration Hospital , Thessaloniki , Greece
| | - Evdokia Mandala
- d Fourth Department of Internal Medicine , Aristotle University, Hippokration Hospital , Thessaloniki , Greece
| | - Vassilios Perifanis
- e First Propedeutic Department of Internal Medicine , Aristotle University, AHEPA General Hospital of Thessaloniki , Thessaloniki , Greece
| | - Pantelis Sarafidis
- f Department of Nephrology , Hippokration Hospital, Aristotle University of Thessaloniki , Thessaloniki , Greece
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Dou H, Qin Y, Chen G, Zhao Y. Effectiveness and Safety of Deferasirox in Thalassemia with Iron Overload: A Meta-Analysis. Acta Haematol 2018; 141:32-42. [PMID: 30504715 DOI: 10.1159/000494487] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 10/12/2018] [Indexed: 01/19/2023]
Abstract
Deferasirox (DFX) has recently been used to treat thalassemia with iron overload; however, its long-term effectiveness and safety await multi-year studies. In this study, a systematic meta-analysis was performed to assess the effectiveness and safety of DFX in the treatment of thalassemia with iron overload. We performed a systematic electronic literature search for randomized controlled studies of DFX in the Embase, Medline, Cochrane, and Chinese Biomedical Literature (CBM) databases from January 1990 to May 2018. Particular attention was paid to mortality, serum ferritin (SF), liver iron concentration (LIC), myocardial iron concentration, and adverse events (AEs). Six studies comparing DFX with deferoxamine (DFO) and placebo were enrolled. DFX was not better than DFO in lowering SF and LIC, with an exception that high DFX dose (> 30 mg/kg/day) was superior to DFO in LIC. Otherwise, AEs such as gastrointestinal problems appeared to be more common with DFX. DFX does not seem to be superior to DFO at low dose. Similar efficacy seems to be achievable depending on dose. However, the convenient oral administration of DFX has a higher compliance rate.
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Affiliation(s)
- Huihong Dou
- Department of Pediatrics, The First Affiliated Hospital, Guangxi Medical University, Nanning, China
| | - Yuanhan Qin
- Department of Pediatrics, The First Affiliated Hospital, Guangxi Medical University, Nanning, China,
| | - Guoli Chen
- Department of Pediatrics, The First Affiliated Hospital, Guangxi Medical University, Nanning, China
| | - Yanjun Zhao
- Department of Pediatrics, The First Affiliated Hospital, Guangxi Medical University, Nanning, China
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Fucile C, Mattioli F, Marini V, Gregori M, Sonzogni A, Martelli A, Maximova N. What is known about deferasirox chelation therapy in pediatric HSCT recipients: two case reports of metabolic acidosis. Ther Clin Risk Manag 2018; 14:1649-1655. [PMID: 30237719 PMCID: PMC6136408 DOI: 10.2147/tcrm.s170761] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
To date, in pediatric field, various hematological malignancies are increasingly treated with allogeneic hematopoietic stem cell transplantation (allo-HSCT). Iron overload and systemic siderosis often occur in this particular cohort of patients and are associated with poor prognosis. We describe herein the case of two allo-HSCT patients, on treatment with deferasirox; they showed histopathological elements compatible with venoocclusive disease or vanishing bile duct syndrome in ductopenic evolution before deferasirox started. The first patient developed drug-induced liver damage with metabolic acidosis and the second one a liver impairment with Fanconi syndrome. After withdrawing deferasirox treatment, both patients showed improvement. Measurements of drug plasma concentrations were performed by HPLC assay. The reduction and consequent disappearance of symptoms after the suspension of deferasirox substantiate its role in inducing hepatic damage, probably enabling the diagnosis of drug-induced liver damage. But the difficulties in diagnosing drug-related toxicity must be underlined, especially in compromised subjects. For these reasons, in patients requiring iron-chelating therapy, close and careful drug therapeutic monitoring is strongly recommended.
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Affiliation(s)
- Carmen Fucile
- Pharmacology and Toxicology, Unit, University of Genoa, Genoa, Italy
| | | | - Valeria Marini
- Pharmacology and Toxicology, Unit, University of Genoa, Genoa, Italy
| | - Massimo Gregori
- Department of Pediatric Radiology, Institute for Maternal and Child Health - IRCCS Burlo Garofalo, Trieste, Italy
| | - Aurelio Sonzogni
- Department of Pathology, Ospedale Beato Papa Giovanni XIII, Bergamo, Italy
| | | | - Natalia Maximova
- Bone Marrow Transplant Unit, Institute for Maternal and Child Health - IRCCS Burlo Garofalo, Trieste, Italy,
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Botzenhardt S, Li N, Chan EW, Sing CW, Wong ICK, Neubert A. Safety profiles of iron chelators in young patients with haemoglobinopathies. Eur J Haematol 2017; 98:198-217. [PMID: 27893170 DOI: 10.1111/ejh.12833] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/08/2016] [Indexed: 12/19/2022]
Abstract
BACKGROUND This review describes the safety of deferoxamine (DFO), deferiprone (DFP), deferasirox (DFX) and combined therapy in young patients less than 25 yr of age with haemoglobinopathies. METHODS Searches in electronic literature databases were performed. Studies reporting adverse events associated with iron chelation therapy were included. Study and reporting quality was assessed using AHRQ Risk of Bias Assessment Tool and McMaster Quality Assessment Scale of Harms. Prospective clinical studies were pooled in a random-effects meta-analysis of proportions. RESULTS Safety data of 2040 patients from 34 studies were included. Ninety-two case reports of 246 patients were identified. DFX (937 patients) and DFP (667 patients) possess the largest published safety evidence. Fewer studies on combination regimens are available. Increased transaminases were seen in all regimens (3.9-31.3%) and gastrointestinal disorders with DFP and DFX (3.7-18.4% and 5.8-18.8%, respectively). Therapy discontinuations due to adverse events were low (0-4.1%). Reporting quality was selective and poor in most of the studies. CONCLUSION Iron chelation therapy is generally safe in young patients, and published data correspond to summary of product characteristics. Each iron chelation regimen has its specific safety risks. DFO seems not to be associated with serious adverse effects in recommended doses. In DFP and DFX, rare, but serious, adverse reactions can occur. Data on combined therapy are scarce, but it seems equally safe compared to monotherapy.
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Affiliation(s)
- Sebastian Botzenhardt
- Department of Paediatrics and Adolescent Medicine, Faculty of Medicine, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Niya Li
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, Centre for Safe Medication Practice and Research, University of Hong Kong, Hong Kong, China.,Clinical Trials Center, The University of Hong Kong - Shenzhen Hospital, Shenzhen, China
| | - Esther W Chan
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, Centre for Safe Medication Practice and Research, University of Hong Kong, Hong Kong, China
| | - Chor Wing Sing
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, Centre for Safe Medication Practice and Research, University of Hong Kong, Hong Kong, China
| | - Ian C K Wong
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, Centre for Safe Medication Practice and Research, University of Hong Kong, Hong Kong, China.,Research Department of Practice & Policy, University College London School of Pharmacy, London, UK
| | - Antje Neubert
- Department of Paediatrics and Adolescent Medicine, Faculty of Medicine, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Erlangen, Germany
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Chuang GT, Tsai IJ, Tsau YK, Lu MY. Transfusion-dependent thalassaemic patients with renal Fanconi syndrome due to deferasirox use. Nephrology (Carlton) 2016; 20:931-5. [PMID: 26016559 DOI: 10.1111/nep.12523] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/24/2015] [Indexed: 01/30/2023]
Abstract
AIM Deferasirox is a new oral iron chelating agent with several cases reporting renal adverse events in recent years. Our aim was to identify the incidence of deferasirox-related Fanconi syndrome (FS) and its risk factors. METHODS All transfusion-dependent thalassaemic patients who received deferasirox at the outpatient department of the National Taiwan University Hospital (NTUH) from January 2006 to February 2014 were evaluated. RESULTS This cohort study included 57 patients, and mean age of deferasirox initiation was 18.2 ± 7.7 years. After 6.9 ± 1.8 years of follow-up, 5 in 57 (8.8%) thalassaemic patients had FS. Age of starting deferasirox negatively correlated with incidence of FS (correlation coefficient -0.892, P = 0.008). Other factors were not significantly associated with FS. Serum creatinine level at the start of deferasirox compared to at the end of study or onset of FS did not show significant change (P = 0.277). All the deferasirox-related FS manifested with proximal renal tubular acidosis and hypophosphataemia, which needed specific treatment or withdrawal of deferasirox use. CONCLUSIONS We recommend that children, especially of young age, who regularly use deferasirox should undergo routine urinalysis and blood testing for early detection of FS.
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Affiliation(s)
- Gwo-Tsann Chuang
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan
| | - I-Jung Tsai
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan
| | - Yong-Kwei Tsau
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan
| | - Meng-Yao Lu
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan
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Jullian-Desayes I, Borel JC, Guerber F, Borel AL, Tamisier R, Levy P, Schwebel C, Pepin JL, Joyeux-Faure M. Drugs influencing acid base balance and bicarbonate concentration readings. Expert Rev Endocrinol Metab 2016; 11:209-216. [PMID: 30058869 DOI: 10.1586/17446651.2016.1147951] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Serum bicarbonate dosage is sensitive to pharmacological interferences. However, elevated bicarbonate concentration reflects chronic hypoventilation and has been proposed as a simple marker for screening patients with Obesity Hypoventilation Syndrome (OHS), a currently underdiagnosed multimorbid and high mortality disease. We provide a practical overview of the different drugs acting on the acid-base equilibrium to aid clinicians to interpret bicarbonate concentration readings. Little is known about the chronic impact of the usual doses of these drugs on serum bicarbonate concentration and further studies are needed. It is essential to take into account drugs that could interfere with this parameter to avoid misinterpretation of serum bicarbonate levels.
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Affiliation(s)
- Ingrid Jullian-Desayes
- a Laboratory HP2, University of Grenoble Alpes , Grenoble , France
- b INSERM U1042, Laboratory HP2 , Grenoble , France
| | - Jean-Christian Borel
- a Laboratory HP2, University of Grenoble Alpes , Grenoble , France
- b INSERM U1042, Laboratory HP2 , Grenoble , France
- c Research and development department , AGIR à dom , Meylan , France
| | - Fabrice Guerber
- d Oriade Laboratory , Oriapole , Saint Martin d'Heres , France
| | - Anne-Laure Borel
- a Laboratory HP2, University of Grenoble Alpes , Grenoble , France
- b INSERM U1042, Laboratory HP2 , Grenoble , France
- e Endocrinology Department , Grenoble University Hospital (CHU de Grenoble) , Grenoble , France
| | - Renaud Tamisier
- a Laboratory HP2, University of Grenoble Alpes , Grenoble , France
- b INSERM U1042, Laboratory HP2 , Grenoble , France
- f Thorax and vessels, EFCR , Grenoble University Hospital (CHU de Grenoble) , Grenoble , France
| | - Patrick Levy
- a Laboratory HP2, University of Grenoble Alpes , Grenoble , France
- b INSERM U1042, Laboratory HP2 , Grenoble , France
- f Thorax and vessels, EFCR , Grenoble University Hospital (CHU de Grenoble) , Grenoble , France
| | - Carole Schwebel
- g Intensive Care Unit , Grenoble University Hospital (CHU de Grenoble) , Grenoble , France
| | - Jean-Louis Pepin
- a Laboratory HP2, University of Grenoble Alpes , Grenoble , France
- b INSERM U1042, Laboratory HP2 , Grenoble , France
- f Thorax and vessels, EFCR , Grenoble University Hospital (CHU de Grenoble) , Grenoble , France
| | - Marie Joyeux-Faure
- a Laboratory HP2, University of Grenoble Alpes , Grenoble , France
- b INSERM U1042, Laboratory HP2 , Grenoble , France
- f Thorax and vessels, EFCR , Grenoble University Hospital (CHU de Grenoble) , Grenoble , France
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Abstract
Metabolic acidosis could emerge from diseases disrupting acid-base equilibrium or from drugs that induce similar derangements. Occurrences are usually accompanied by comorbid conditions of drug-induced metabolic acidosis, and clinical outcomes may range from mild to fatal. It is imperative that clinicians not only are fully aware of the list of drugs that may lead to metabolic acidosis but also understand the underlying pathogenic mechanisms. In this review, we categorized drug-induced metabolic acidosis in terms of pathophysiological mechanisms, as well as individual drugs’ characteristics.
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Affiliation(s)
- Amy Quynh Trang Pham
- Charles and Jane Pak Center for Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, 75390-8885, USA; Departments of Internal Medicine, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, 75390-8885, USA; Baylor Family Medicine Residency at Garland, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, 75390-8885, USA
| | - Li Hao Richie Xu
- Charles and Jane Pak Center for Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, 75390-8885, USA
| | - Orson W Moe
- Charles and Jane Pak Center for Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, 75390-8885, USA; Departments of Internal Medicine, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, 75390-8885, USA; Department of Physiology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, 75390-8885, USA
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