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4.
Georgian Med News ; (348): 99-102, 2024 Mar.
Article in English | MEDLINE | ID: mdl-38807401

ABSTRACT

Accumulation of iron in vital organs is increasingly challenging in clinical settings during the lifespan of thalassemia patients. Iron overload hurdle these organs to redox imbalances. Commonly used iron-chelating agents in (deferasirox and, deferoxamine) could have a positive antioxidant role. Therefore, the aim of this study was designed to compare the effects of deferasirox and, deferoxamine, iron-chelating agents in oxidative stress in patients with ß-thalassemic major. In this case series comparative study, 60 known cases of ß-thalassemic patients receiving chelating agents therapy were divided into two groups of thirty, group one consisted of 30 patients 16 male and14 female, who received oral agent deferasirox tablets at dose 20-40mg/kg. Group two consisted of 30 patients, 16 male and 14 female, on intravenous therapy with Deferoxamine at a dose of 20-50mg/kg, Another thirty healthy individuals matched with age and gender, were kept as a control group. Total antioxidant capacity (TAOC) and Malondialdehyde (MDA) were measured in all studied groups. The three groups were similar in terms of age, and gender, A statistically non-significant difference in age (p>0.05) existed between the control and patient groups (10.9±2.93; 11.2±4.1*;11.6±3.6*) respectively. The number of patients in to control group and male-to-female numbers were matched since the ratios were similar. A statistically non-significant difference in BMI (p>0.05) existed between the control and patient groups (17±2, 17.2±2, 18±2.4*) respectively. TAOC is lower in-patient groups, when compared with the control group (27.8 ± 10.7; 32.5 ± 10.2; and 79.5 ± 7 u/ml) respectively, while the MDA value is higher when compared with the control group (7.2±4.6 and, 6.6±4.42; and 0.57±0.26; nmol/ml) respectively. The TAOC in patients group on Deferoxamine, is higher, while MDA is lower than in patients on Defrasirox. The TAOC in patients was reduced and Oxidative stress was enhanced in patients with thalassemia. Deferoxamine is more effective in modulating redox status.


Subject(s)
Benzoates , Deferasirox , Deferoxamine , Iron Chelating Agents , Malondialdehyde , Oxidative Stress , Triazoles , beta-Thalassemia , Humans , Deferasirox/therapeutic use , beta-Thalassemia/drug therapy , beta-Thalassemia/complications , Oxidative Stress/drug effects , Deferoxamine/therapeutic use , Male , Female , Iron Chelating Agents/therapeutic use , Benzoates/therapeutic use , Benzoates/administration & dosage , Triazoles/therapeutic use , Malondialdehyde/blood , Malondialdehyde/metabolism , Adult , Antioxidants/therapeutic use , Adolescent , Young Adult , Iron Overload/drug therapy
5.
Cardiovasc Diabetol ; 23(1): 186, 2024 May 29.
Article in English | MEDLINE | ID: mdl-38812011

ABSTRACT

BACKGROUND: Vascular calcification (VC) is an independent risk factor for cardiovascular diseases. Recently, ferroptosis has been recognised as a novel therapeutic target for cardiovascular diseases. Although an association between ferroptosis and vascular calcification has been reported, the role and mechanism of iron overload in vascular calcification are still poorly understood. Specifically, further in-depth research is required on whether metalloproteins SLC39a14 and SLC39a8 are involved in ferroptosis induced by iron overload. METHODS: R language was employed for the differential analysis of the dataset, revealing the correlation between ferroptosis and calcification. The experimental approaches encompassed both in vitro and in vivo studies, incorporating the use of iron chelators and models of iron overload. Additionally, gain- and loss-of-function experiments were conducted to investigate iron's effects on vascular calcification comprehensively. Electron microscopy, immunofluorescence, western blotting, and real-time polymerase chain reaction were used to elucidate how Slc39a14 and Slc39a8 mediate iron overload and promote calcification. RESULTS: Ferroptosis was observed in conjunction with vascular calcification (VC); the association was consistently confirmed by in vitro and in vivo studies. Our results showed a positive correlation between iron overload in VSMCs and calcification. Iron chelators are effective in reversing VC and iron overload exacerbates this process. The expression levels of the metal transport proteins Slc39a14 and Slc39a8 were significantly upregulated during calcification; the inhibition of their expression alleviated VC. Conversely, Slc39a14 overexpression exacerbates calcification and promotes intracellular iron accumulation in VSMCs. CONCLUSIONS: Our research demonstrates that iron overload occurs during VC, and that inhibition of Slc39a14 and Slc39a8 significantly relieves VC by intercepting iron overload-induced ferroptosis in VSMCs, providing new insights into the VC treatment.


Subject(s)
Cation Transport Proteins , Disease Models, Animal , Ferroptosis , Iron Chelating Agents , Mice, Inbred C57BL , Muscle, Smooth, Vascular , Myocytes, Smooth Muscle , Vascular Calcification , Ferroptosis/drug effects , Vascular Calcification/metabolism , Vascular Calcification/pathology , Animals , Cation Transport Proteins/metabolism , Cation Transport Proteins/genetics , Myocytes, Smooth Muscle/metabolism , Myocytes, Smooth Muscle/drug effects , Myocytes, Smooth Muscle/pathology , Muscle, Smooth, Vascular/pathology , Muscle, Smooth, Vascular/metabolism , Muscle, Smooth, Vascular/drug effects , Iron Chelating Agents/pharmacology , Iron Chelating Agents/therapeutic use , Signal Transduction , Male , Humans , Iron/metabolism , Iron Overload/metabolism , Iron Overload/pathology
6.
Int J Mol Sci ; 25(10)2024 May 09.
Article in English | MEDLINE | ID: mdl-38791185

ABSTRACT

Acetylsalicylic acid or aspirin is the most commonly used drug in the world and is taken daily by millions of people. There is increasing evidence that chronic administration of low-dose aspirin of about 75-100 mg/day can cause iron deficiency anaemia (IDA) in the absence of major gastric bleeding; this is found in a large number of about 20% otherwise healthy elderly (>65 years) individuals. The mechanisms of the cause of IDA in this category of individuals are still largely unknown. Evidence is presented suggesting that a likely cause of IDA in this category of aspirin users is the chelation activity and increased excretion of iron caused by aspirin chelating metabolites (ACMs). It is estimated that 90% of oral aspirin is metabolized into about 70% of the ACMs salicyluric acid, salicylic acid, 2,5-dihydroxybenzoic acid, and 2,3-dihydroxybenzoic acid. All ACMs have a high affinity for binding iron and ability to mobilize iron from different iron pools, causing an overall net increase in iron excretion and altering iron balance. Interestingly, 2,3-dihydroxybenzoic acid has been previously tested in iron-loaded thalassaemia patients, leading to substantial increases in iron excretion. The daily administration of low-dose aspirin for long-term periods is likely to enhance the overall iron excretion in small increments each time due to the combined iron mobilization effect of the ACM. In particular, IDA is likely to occur mainly in populations such as elderly vegetarian adults with meals low in iron content. Furthermore, IDA may be exacerbated by the combinations of ACM with other dietary components, which can prevent iron absorption and enhance iron excretion. Overall, aspirin is acting as a chelating pro-drug similar to dexrazoxane, and the ACM as combination chelation therapy. Iron balance, pharmacological, and other studies on the interaction of iron and aspirin, as well as ACM, are likely to shed more light on the mechanism of IDA. Similar mechanisms of iron chelation through ACM may also be implicated in patient improvements observed in cancer, neurodegenerative, and other disease categories when treated long-term with daily aspirin. In particular, the role of aspirin and ACM in iron metabolism and free radical pathology includes ferroptosis, and may identify other missing links in the therapeutic effects of aspirin in many more diseases. It is suggested that aspirin is the first non-chelating drug described to cause IDA through its ACM metabolites. The therapeutic, pharmacological, toxicological and other implications of aspirin are incomplete without taking into consideration the iron binding and other effects of the ACM.


Subject(s)
Anemia, Iron-Deficiency , Aspirin , Iron Chelating Agents , Iron , Humans , Aspirin/therapeutic use , Aspirin/metabolism , Anemia, Iron-Deficiency/metabolism , Anemia, Iron-Deficiency/drug therapy , Iron/metabolism , Iron Chelating Agents/therapeutic use , Iron Chelating Agents/metabolism , Salicylic Acid/metabolism , Gentisates/metabolism , Hippurates/metabolism , Hydroxybenzoates
7.
Int J Mol Sci ; 25(9)2024 Apr 25.
Article in English | MEDLINE | ID: mdl-38731873

ABSTRACT

The supply and control of iron is essential for all cells and vital for many physiological processes. All functions and activities of iron are expressed in conjunction with iron-binding molecules. For example, natural chelators such as transferrin and chelator-iron complexes such as haem play major roles in iron metabolism and human physiology. Similarly, the mainstay treatments of the most common diseases of iron metabolism, namely iron deficiency anaemia and iron overload, involve many iron-chelator complexes and the iron-chelating drugs deferiprone (L1), deferoxamine (DF) and deferasirox. Endogenous chelators such as citric acid and glutathione and exogenous chelators such as ascorbic acid also play important roles in iron metabolism and iron homeostasis. Recent advances in the treatment of iron deficiency anaemia with effective iron complexes such as the ferric iron tri-maltol complex (feraccru or accrufer) and the effective treatment of transfusional iron overload using L1 and L1/DF combinations have decreased associated mortality and morbidity and also improved the quality of life of millions of patients. Many other chelating drugs such as ciclopirox, dexrazoxane and EDTA are used daily by millions of patients in other diseases. Similarly, many other drugs or their metabolites with iron-chelation capacity such as hydroxyurea, tetracyclines, anthracyclines and aspirin, as well as dietary molecules such as gallic acid, caffeic acid, quercetin, ellagic acid, maltol and many other phytochelators, are known to interact with iron and affect iron metabolism and related diseases. Different interactions are also observed in the presence of essential, xenobiotic, diagnostic and theranostic metal ions competing with iron. Clinical trials using L1 in Parkinson's, Alzheimer's and other neurodegenerative diseases, as well as HIV and other infections, cancer, diabetic nephropathy and anaemia of inflammation, highlight the importance of chelation therapy in many other clinical conditions. The proposed use of iron chelators for modulating ferroptosis signifies a new era in the design of new therapeutic chelation strategies in many other diseases. The introduction of artificial intelligence guidance for optimal chelation therapeutic outcomes in personalised medicine is expected to increase further the impact of chelation in medicine, as well as the survival and quality of life of millions of patients with iron metabolic disorders and also other diseases.


Subject(s)
Iron Chelating Agents , Iron Overload , Humans , Iron Overload/drug therapy , Iron Overload/metabolism , Iron Chelating Agents/therapeutic use , Iron Chelating Agents/pharmacology , Anemia, Iron-Deficiency/drug therapy , Anemia, Iron-Deficiency/metabolism , Iron/metabolism , Animals , Deferiprone/therapeutic use , Deferiprone/pharmacology
8.
Eur J Med Res ; 29(1): 253, 2024 Apr 24.
Article in English | MEDLINE | ID: mdl-38659000

ABSTRACT

The progression of heart failure (HF) is complex and involves multiple regulatory pathways. Iron ions play a crucial supportive role as a cofactor for important proteins such as hemoglobin, myoglobin, oxidative respiratory chain, and DNA synthetase, in the myocardial energy metabolism process. In recent years, numerous studies have shown that HF is associated with iron dysmetabolism, and deficiencies in iron and overload of iron can both lead to the development of various myocarditis diseases, which ultimately progress to HF. Iron toxicity and iron metabolism may be key targets for the diagnosis, treatment, and prevention of HF. Some iron chelators (such as desferrioxamine), antioxidants (such as ascorbate), Fer-1, and molecules that regulate iron levels (such as lactoferrin) have been shown to be effective in treating HF and protecting the myocardium in multiple studies. Additionally, certain natural compounds can play a significant role by mediating the imbalance of iron-related signaling pathways and expression levels. Therefore, this review not only summarizes the basic processes of iron metabolism in the body and the mechanisms by which they play a role in HF, with the aim of providing new clues and considerations for the treatment of HF, but also summarizes recent studies on natural chemical components that involve ferroptosis and its role in HF pathology, as well as the mechanisms by which naturally occurring products regulate ferroptosis in HF, with the aim of providing reference information for the development of new ferroptosis inhibitors and lead compounds for the treatment of HF in the future.


Subject(s)
Biological Products , Heart Failure , Iron , Humans , Heart Failure/metabolism , Heart Failure/drug therapy , Iron/metabolism , Biological Products/therapeutic use , Biological Products/pharmacology , Animals , Ferroptosis/drug effects , Iron Chelating Agents/therapeutic use , Iron Chelating Agents/pharmacology , Antioxidants/therapeutic use
9.
Int J Mol Sci ; 25(8)2024 Apr 12.
Article in English | MEDLINE | ID: mdl-38673855

ABSTRACT

Iron accumulation in the brain is a common feature of many neurodegenerative diseases. Its involvement spans across the main proteinopathies involving tau, amyloid-beta, alpha-synuclein, and TDP-43. Accumulating evidence supports the contribution of iron in disease pathologies, but the delineation of its pathogenic role is yet challenged by the complex involvement of iron in multiple neurotoxicity mechanisms and evidence supporting a reciprocal influence between accumulation of iron and protein pathology. Here, we review the major proteinopathy-specific observations supporting four distinct hypotheses: (1) iron deposition is a consequence of protein pathology; (2) iron promotes protein pathology; (3) iron protects from or hinders protein pathology; and (4) deposition of iron and protein pathology contribute parallelly to pathogenesis. Iron is an essential element for physiological brain function, requiring a fine balance of its levels. Understanding of disease-related iron accumulation at a more intricate and systemic level is critical for advancements in iron chelation therapies.


Subject(s)
Iron , Neurodegenerative Diseases , Humans , Iron/metabolism , Neurodegenerative Diseases/metabolism , Animals , tau Proteins/metabolism , Amyloid beta-Peptides/metabolism , Brain/metabolism , Brain/pathology , alpha-Synuclein/metabolism , DNA-Binding Proteins/metabolism , Iron Chelating Agents/therapeutic use
10.
Int J Mol Sci ; 25(8)2024 Apr 12.
Article in English | MEDLINE | ID: mdl-38673849

ABSTRACT

In this short review we have presented and discussed studies on pharmacogenomics (also termed pharmacogenetics) of the drugs employed in the treatment of ß-thalassemia or Sickle-cell disease (SCD). This field of investigation is relevant, since it is expected to help clinicians select the appropriate drug and the correct dosage for each patient. We first discussed the search for DNA polymorphisms associated with a high expression of γ-globin genes and identified this using GWAS studies and CRISPR-based gene editing approaches. We then presented validated DNA polymorphisms associated with a high HbF production (including, but not limited to the HBG2 XmnI polymorphism and those related to the BCL11A, MYB, KLF-1, and LYAR genes). The expression of microRNAs involved in the regulation of γ-globin genes was also presented in the context of pharmacomiRNomics. Then, the pharmacogenomics of validated fetal hemoglobin inducers (hydroxyurea, butyrate and butyrate analogues, thalidomide, and sirolimus), of iron chelators, and of analgesics in the pain management of SCD patients were considered. Finally, we discuss current clinical trials, as well as international research networks focusing on clinical issues related to pharmacogenomics in hematological diseases.


Subject(s)
Anemia, Sickle Cell , Pharmacogenetics , beta-Thalassemia , Humans , Anemia, Sickle Cell/genetics , Anemia, Sickle Cell/drug therapy , beta-Thalassemia/genetics , beta-Thalassemia/drug therapy , Pharmacogenetics/methods , Fetal Hemoglobin/genetics , gamma-Globins/genetics , Iron Chelating Agents/therapeutic use , Iron Chelating Agents/pharmacology
11.
Neurochem Int ; 176: 105725, 2024 Jun.
Article in English | MEDLINE | ID: mdl-38561151

ABSTRACT

Epilepsy constitutes a global health concern, affecting millions of individuals and approximately one-third of patients exhibit drug resistance. Recent investigations have revealed alterations in cerebral iron content in both epilepsy patients and animal models. However, the extant literature lacks a comprehensive exploration into the ramifications of modulating iron homeostasis as an intervention in epilepsy. This study investigated the impact of deferasirox, a iron ion chelator, on epilepsy. This study unequivocally substantiated the antiepileptic efficacy of deferasirox in a kainic acid-induced epilepsy model. Furthermore, deferasirox administration mitigated seizure susceptibility in a pentylenetetrazol-induced kindling model. Conversely, the augmentation of iron levels through supplementation has emerged as a potential exacerbating factor in the precipitating onset of epilepsy. Intriguingly, our investigation revealed a hitherto unreported discovery: ITPRIP was identified as a pivotal modulator of excitatory synaptic transmission, regulating seizures in response to deferasirox treatment. In summary, our findings indicate that deferasirox exerts its antiepileptic effects through the precise targeting of ITPRIP and amelioration of cerebral iron homeostasis, suggesting that deferasirox is a promising and novel therapeutic avenue for interventions in epilepsy.


Subject(s)
Anticonvulsants , Brain , Deferasirox , Epilepsy , Homeostasis , Iron Chelating Agents , Iron , Deferasirox/pharmacology , Iron/metabolism , Animals , Homeostasis/drug effects , Homeostasis/physiology , Epilepsy/drug therapy , Epilepsy/metabolism , Anticonvulsants/pharmacology , Anticonvulsants/therapeutic use , Male , Brain/drug effects , Brain/metabolism , Iron Chelating Agents/pharmacology , Iron Chelating Agents/therapeutic use , Mice , Kindling, Neurologic/drug effects , Pentylenetetrazole/toxicity , Rats, Sprague-Dawley
12.
Clin Immunol ; 263: 110205, 2024 Jun.
Article in English | MEDLINE | ID: mdl-38575044

ABSTRACT

Increasing clinical data show that the imbalance of host metallome is closely associated with different kinds of disease, however, the intrinsic mechanisms of action of metals in immunity and pathogenesis of disease remain largely undefined. There is lack of multiplexed profiling system to integrate the metalloproteome-immunoproteome information at systemic level for exploring the roles of metals in immunity and disease pathogenesis. In this study, we build up a metal-coding assisted multiplexed proteome assay platform for serum metalloproteomic and immunoproteomic profiling. By taking COVID-19 as a showcase, we unbiasedly uncovered the most evident modulation of iron-related proteins, i.e., Ft and Tf, in serum of severe COVID-19 patients, and the value of Ft/Tf could work as a robust biomarker for COVID-19 severity stratification, which overtakes the well-established clinical risk factors (cytokines). We further uncovered a tight association of transferrin with inflammation mediator IL-10 in COVID-19 patients, which was proved to be mainly governed by the monocyte/macrophage of liver, shedding light on new pathophysiological and immune regulatory mechanisms of COVID-19 disease. We finally validated the beneficial effects of iron chelators as anti-viral agents in SARS-CoV-2-infected K18-hACE2 mice through modulation of iron dyshomeostasis and alleviating inflammation response. Our findings highlight the critical role of liver-mediated iron dysregulation in COVID-19 disease severity, providing solid evidence on the involvement of iron-related proteins in COVID-19 pathophysiology and immunity.


Subject(s)
COVID-19 , Iron , Proteome , SARS-CoV-2 , COVID-19/immunology , Humans , Animals , SARS-CoV-2/immunology , Mice , Iron/metabolism , Proteomics/methods , Transferrin/metabolism , Metalloproteins/immunology , Metalloproteins/metabolism , Male , Female , Biomarkers/blood , Biomarkers/metabolism , Iron Chelating Agents/therapeutic use , Iron Chelating Agents/pharmacology , Interleukin-10/immunology , Interleukin-10/metabolism , Middle Aged
13.
Am J Hematol ; 99(6): 1031-1039, 2024 Jun.
Article in English | MEDLINE | ID: mdl-38429922

ABSTRACT

Patients with sickle cell disease (SCD) and other anemias who receive blood transfusions are at risk of organ damage due to transfusional iron overload. Deferiprone is an iron chelator with a well-established safety and efficacy profile that is indicated for the treatment of transfusional iron overload. Here, we report safety data from the large-scale, retrospective Ferriprox® Total Care Registry, which involved all patients with SCD taking deferiprone following the 2011 approval of deferiprone in the United States through August 2020. A total of 634 patients who had initiated deferiprone treatment were included. The mean (SD) duration of deferiprone exposure in the registry was 1.6 (1.6) years (range 0 to 9.7 years). In the overall patient population (N = 634), 64.7% (n = 410) of patients reported a total of 1885 adverse events (AEs). In subgroup analyses, 54.6% (n = 71) of pediatric patients and 67.3% (n = 339) of adult patients reported AEs. The most common AEs reported in patients receiving deferiprone were sickle cell crisis (22.7%), nausea (12.1%), vomiting (8.7%), abdominal discomfort (5.4%), and fatigue (5.4%). Neutropenia was reported in four (0.6%) patients and severe neutropenia/agranulocytosis (defined as absolute neutrophil count <0.5 × 109/L) was reported in two (0.3%) patients. Of patients with evaluable data, all cases of neutropenia and severe neutropenia/agranulocytosis resolved with deferiprone discontinuation. Results from the nearly 10 years of real-world data collected in the Ferriprox® Total Care Registry demonstrate that deferiprone is safe and well tolerated in patients with SCD or other anemias who have transfusional iron overload.


Subject(s)
Anemia, Sickle Cell , Deferiprone , Iron Chelating Agents , Registries , Humans , Deferiprone/therapeutic use , Deferiprone/adverse effects , Anemia, Sickle Cell/drug therapy , Male , Child , Adult , Female , Adolescent , Iron Chelating Agents/therapeutic use , Iron Chelating Agents/adverse effects , Iron Chelating Agents/administration & dosage , Retrospective Studies , Iron Overload/drug therapy , Iron Overload/etiology , Child, Preschool , Young Adult , Middle Aged , Infant
14.
Br J Haematol ; 204(5): 2049-2056, 2024 May.
Article in English | MEDLINE | ID: mdl-38343073

ABSTRACT

Iron overload from repeated transfusions has a negative impact on cardiac function, and iron chelation therapy may help prevent cardiac dysfunction in transfusion-dependent patients with myelodysplastic syndromes (MDS). TELESTO (NCT00940602) was a prospective, placebo-controlled, randomised study to evaluate the iron chelator deferasirox in patients with low- or intermediate-1-risk MDS and iron overload. Echocardiographic parameters were collected at screening and during treatment. Patients receiving deferasirox experienced a significant decrease in the composite risk of hospitalisation for congestive heart failure (CHF) or worsening of cardiac function (HR = 0.23; 95% CI: 0.05, 0.99; nominal p = 0.0322) versus placebo. No significant differences between the arms were found in left ventricular ejection fraction, ventricular diameter and mass or pulmonary artery pressure. The absolute number of events was low, but the enrolled patients were younger than average for patients with MDS, with no serious cardiac comorbidities and a modest cardiovascular risk profile. These results support the effectiveness of deferasirox in preventing cardiac damage caused by iron overload in this patient population. Identification of patients developing CHF is challenging due to the lack of distinctive echocardiographic features. The treatment of iron overload may be important to prevent cardiac dysfunction in these patients, even those with moderate CHF risk.


Subject(s)
Deferasirox , Iron Chelating Agents , Iron Overload , Myelodysplastic Syndromes , Humans , Deferasirox/therapeutic use , Myelodysplastic Syndromes/therapy , Myelodysplastic Syndromes/drug therapy , Myelodysplastic Syndromes/complications , Male , Female , Iron Chelating Agents/therapeutic use , Middle Aged , Aged , Iron Overload/etiology , Iron Overload/drug therapy , Prospective Studies , Benzoates/therapeutic use , Benzoates/adverse effects , Heart Failure/etiology , Transfusion Reaction/etiology , Echocardiography , Adult , Aged, 80 and over , Triazoles/therapeutic use , Triazoles/adverse effects , Blood Transfusion
15.
CNS Neurosci Ther ; 30(2): e14607, 2024 02.
Article in English | MEDLINE | ID: mdl-38334258

ABSTRACT

INTRODUCTION: Several studies have reported iron accumulation in the basal ganglia to be associated with the development of Parkinson's Disease (PD). Recently, a few trials have examined the efficacy of using the iron-chelating agent Deferiprone (DFP) for patients with PD. We conducted this meta-analysis to summarize and synthesize evidence from published randomized controlled trials about the efficacy of DFP for PD patients. METHODS: A comprehensive literature search of four electronic databases was performed, spanning until February 2023. Relevant RCTs were selected, and their data were extracted and analyzed using the RevMan software. The primary outcome was the change in the Unified Parkinson's Disease Rating Scale (UPDRS-III). RESULTS: Three RCTs with 431 patients were included in this analysis. DFP did not significantly improve UPDRS-III score compared to placebo (Standardized mean difference -0.06, 95% CI [-0.69, 0.58], low certainty evidence). However, it significantly reduced iron accumulation in the substantia nigra, putamen, and caudate as measured by T2*-weighted MRI (with high certainty evidence). CONCLUSION: Current evidence does not support the use of DFP in PD patients. Future disease-modification trials with better population selection, adjustment for concomitant medications, and long-term follow up are recommended.


Subject(s)
Parkinson Disease , Humans , Deferiprone/therapeutic use , Parkinson Disease/diagnostic imaging , Parkinson Disease/drug therapy , Iron Chelating Agents/therapeutic use , Iron , Substantia Nigra
16.
Article in English | MEDLINE | ID: mdl-38423705

ABSTRACT

Deferasirox is an iron-chelating drug developed by Novartis company for treatment of diseases accompanied by chronic iron overload; such as ß-thalassemia or sickle cell diseases. Owing to its advantages such as high affinity, specificity and wide therapeutic window, it is considered as first line treatment. The current chapter describes the physicochemical characteristics, mode of action, pharmacokinetics, therapeutic applications and synthetic methods for deferasirox. Moreover, it includes Fourier transform infrared spectrometry (FTIR) and nuclear magnetic resonance spectroscopy (NMR) analysis for its functional groups. In addition, the selected analytical methods are summarized to aid the analysts in their routine analysis of deferasirox.


Subject(s)
Benzoates , Iron Overload , Humans , Deferasirox/pharmacology , Deferasirox/therapeutic use , Benzoates/pharmacology , Benzoates/therapeutic use , Benzoates/metabolism , Triazoles/therapeutic use , Triazoles/pharmacokinetics , Iron Chelating Agents/pharmacology , Iron Chelating Agents/therapeutic use , Iron Chelating Agents/metabolism , Iron Overload/drug therapy , Iron/metabolism , Iron/therapeutic use
17.
Health Qual Life Outcomes ; 22(1): 14, 2024 Feb 02.
Article in English | MEDLINE | ID: mdl-38302961

ABSTRACT

Understanding consequences of poor chelation compliance is crucial given the enormous burden of post-transfusional iron overload complications. We systematically reviewed iron-chelation therapy (ICT) compliance, and the relationship between compliance with health outcome and health-related quality of life (HRQoL) in thalassaemia patients. Several reviewers performed systematic search strategy of literature through PubMed, Scopus, and EBSCOhost. The preferred reporting items of systematic reviews and meta-analyses (PRISMA) guidelines were followed. Of 4917 studies, 20 publications were included. The ICT compliance rate ranges from 20.93 to 75.3%. It also varied per agent, ranging from 48.84 to 85.1% for desferioxamine, 87.2-92.2% for deferiprone and 90-100% for deferasirox. Majority of studies (N = 10/11, 90.91%) demonstrated significantly negative correlation between compliance and serum ferritin, while numerous studies revealed poor ICT compliance linked with increased risk of liver disease (N = 4/7, 57.14%) and cardiac disease (N = 6/8, 75%), endocrinologic morbidity (N = 4/5, 90%), and lower HRQoL (N = 4/6, 66.67%). Inadequate compliance to ICT therapy is common. Higher compliance is correlated with lower serum ferritin, lower risk of complications, and higher HRQoL. These findings should be interpreted with caution given the few numbers of evidence.


Subject(s)
Iron Chelating Agents , Thalassemia , Humans , Iron Chelating Agents/therapeutic use , Deferasirox , Deferiprone , Deferoxamine/therapeutic use , Quality of Life , Pyridones/adverse effects , Benzoates/adverse effects , Triazoles/adverse effects , Thalassemia/drug therapy , Chelation Therapy , Ferritins , Outcome Assessment, Health Care
18.
ACS Infect Dis ; 10(2): 676-687, 2024 Feb 09.
Article in English | MEDLINE | ID: mdl-38287902

ABSTRACT

Iron, as an essential micronutrient, plays a crucial role in host-pathogen interactions. In order to limit the growth of the pathogen, a common strategy of innate immunity includes withdrawing available iron to interfere with the cellular processes of the microorganism. Against that, unicellular parasites have developed powerful strategies to scavenge iron, despite the effort of the host. Iron-sequestering compounds, such as the approved and potent chelator deferoxamine (DFO), are considered a viable option for therapeutic intervention. Since iron is heavily utilized in the mitochondrion, targeting iron chelators in this organelle could constitute an effective therapeutic strategy. This work presents mitochondrially targeted DFO, mitoDFO, as a candidate against a range of unicellular parasites with promising in vitro efficiency. Intracellular Leishmania infection can be cleared by this compound, and experimentation with Trypanosoma brucei 427 elucidates its possible mode of action. The compound not only affects iron homeostasis but also alters the physiochemical properties of the inner mitochondrial membrane, resulting in a loss of function. Furthermore, investigating the virulence factors of pathogenic yeasts confirms that mitoDFO is a viable candidate for therapeutic intervention against a wide spectrum of microbe-associated diseases.


Subject(s)
Anti-Infective Agents , Iron , Deferoxamine/chemistry , Antiparasitic Agents/pharmacology , Iron Chelating Agents/pharmacology , Iron Chelating Agents/therapeutic use , Mitochondria
19.
PLoS One ; 19(1): e0284267, 2024.
Article in English | MEDLINE | ID: mdl-38215162

ABSTRACT

BACKGROUND AND AIM: Hypozincemia is a prevalent adverse consequence in diabetes mellitus (DM) and ß-Thalassemia patients. We aimed to evaluate the level of serum zinc in ß-thalassemia patients with DM and a risk assessment for hypozincemia. METHODS: The study population included transfusion-dependent thalassemia (TDT) and non-transfusion-dependent thalassemia (NTDT) with overt DM (fasting plasma glucose (FPG) ≥126 mg/dL, and/or 2-h plasma glucose≥200 mg/dL). Serum zinc concentration was measured by the colorimetric method, and the values below 70 µg/dL were defined as hypozincemia. Myocardial and liver T2*-weighted magnetic resonance imaging (MRI T2*, millisecond [ms]) were valued by a free contrast MRI. The demographic, clinical, paraclinical, and laboratory data were also recorded. The data belonged to the period from December 2018 until December 2020. RESULTS: Of 64 diabetic ß-thalassemia patients, 41 cases had zinc data in their medical files (aged 38 ± 9 years, 48.8% female). 78.05% of patients (n = 32) were TDT, and 21.95% were NTDT (n = 9). The mean ± standard deviation of zinc level was 110.2 ± 127.6 µg/dL. The prevalence of hypozincemia was 9.76%, 95% confidence interval [CI] 0.27 to 19.24 (four cases). After controlling age, the odds of hypozincemia for using deferasirox (DFX) was 8.77, 95% CI 0.60 to 127.1. In ß-thalassemia patients, the age-adjusted risk of hypozincemia was calculated at 15.85, 95% CI 0.47 to 529.3 for hepatitis C. The adjusted risk of hypozincemia based on age for antacid use was 6.34, 95% CI 0.39 to 102.7. CONCLUSION: In light of this study, as well as hepatitis C, using DFX and antacids is associated with a high risk of hypozincemia amid diabetic ß-thalassemia cases. However, upward bias should be taken into consideration.


Subject(s)
Diabetes Mellitus , Hepatitis C , Iron Overload , Thalassemia , beta-Thalassemia , Humans , Female , Male , beta-Thalassemia/complications , beta-Thalassemia/drug therapy , Deferasirox/therapeutic use , Iron Overload/complications , Blood Glucose , Risk Factors , Thalassemia/epidemiology , Hepatitis C/complications , Diabetes Mellitus/drug therapy , Diabetes Mellitus/chemically induced , Zinc , Iron Chelating Agents/therapeutic use
20.
Ann N Y Acad Sci ; 1532(1): 50-62, 2024 Feb.
Article in English | MEDLINE | ID: mdl-38270933

ABSTRACT

Health-related quality of life (HRQOL) is a patient-reported outcome that assesses the impact of a disease or illness on different domains of a patient's life. Different general and disease-specific measures can be used to evaluate HRQOL. This article aimed to summarize the evidence for HRQOL among patients with transfusion-dependent (TDT) and non-transfusion-dependent thalassemia (NTDT). We included HRQOL data related to standard therapy with blood transfusions, iron chelation, and/or luspatercept in TDT and NTDT, as well as curative therapies for TDT, including hematopoietic stem cell transplant (HSCT) and gene therapy. Patients with thalassemia had worse HRQOL scores compared to the general population, and chronic pain was seen to increase in frequency and severity over time with age. NTDT patients reported worse physical health and functioning, mental health, general health, and vitality than TDT patients. However, TDT patients reported worse pain, change in health, and social support than NTDT. Most therapies improved overall HRQOL among thalassemia patients. Deferasirox, an oral iron chelator, was associated with more HRQOL benefits compared to deferoxamine, an intravenous iron chelator. Luspatercept showed clinically meaningful improvement in physical functioning among TDT and NTDT. Furthermore, HSCT and gene therapy were associated with better physical, emotional, and mental domains scores.


Subject(s)
Chronic Pain , Iron Overload , Thalassemia , Humans , Quality of Life , Thalassemia/therapy , Thalassemia/complications , Iron Chelating Agents/therapeutic use , Blood Transfusion , Iron Overload/complications
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