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      Parenteral Iron Therapy in Treatment of Anemia in End-Stage Renal Disease Patients: A Comparative Study between Iron Saccharate and Gluconate

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          Abstract

          Background: Anemia in hemodialysis patients is a complex syndrome. The impetus of this study was to assess the safety and efficacy of iron saccharate complex (ISC) and sodium ferric gluconate complex (SFGC) in treating anemia in hemodialysis patients. Methods: Forty-eight adult anemic patients of both genders (33 males and 15 females) who had an adequate level of both hemodialysis and nutrition status and received neither EPO nor parenteral iron therapy during the preceding 6 months were randomized to 2 groups. The first group comprised 22 patients who were treated with parenteral ISC, 100 mg twice weekly for 2 months and once weekly thereafter. The second group included 26 patients who received SFGC, 62.5 mg twice weekly for 2 months and once weekly thereafter. The patients were followed up for 6 months. Results: This head-to-head study showed that iron stores were adequately repleted by the use of both drugs. Repletion of iron stores was associated with a significant rise in both hemoglobin and hematocrit in both groups at the end of the follow-up period in comparison to their initial values at the start of the study (p < 0.001). Both parenteral iron therapy preparations were tolerated without a statistical difference between both groups. Conclusion: This head-to-head study confirmed that both parenteral iron preparations are effective for adequate repletion of iron stores and constituted a step forward in the management of anemic hemodialysis patients without noticeable adverse effects related to the administration of both iron preparations.

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          Parenteral iron formulations: a comparative toxicologic analysis and mechanisms of cell injury.

          Multiple parenteral iron (Fe) formulations exist for administration to patients with end-stage renal disease. Although there are concerns regarding their potential toxicities, no direct in vitro comparisons of these agents exist. Thus, the present study contrasted pro-oxidant and cytotoxic potentials of four available Fe preparations: Fe dextran (Fe dext), Fe sucrose (Fe sucr), Fe gluconate (Fe gluc), and Fe oligosaccharide (Fe OS). Differing dosages (0.06 to 1 mg/mL) of each compound were added to either (1) isolated mouse proximal tubule segments, (2) renal cortical homogenates, or (3) cultured human proximal tubule (HK-2) cells (0.5- to 72-hour incubations). Oxidant injury (malondialdehyde generation) and lethal cell injury (percentage of lactate dehydrogenase release; tetrazolium dye uptake) were assessed. Effects of selected antioxidants (glutathione [GSH], catalase, dimethylthiourea (DMTU), and sodium benzoate also were assessed. Each test agent induced massive and similar degrees of lipid peroxidation. Nevertheless, marked differences in cell death resulted (Fe sucr > Fe gluc > Fe dext approximately Fe OS). This relative toxicity profile also was observed in cultured aortic endothelial cells. Catalase, DMTU, and sodium benzoate conferred no protection. However, GSH and its constituent amino acid glycine blocked Fe sucr-mediated cell death. The latter was mediated by mitochondrial blockade, causing free radical generation and a severe adenosine triphosphate depletion state. (1) parenteral Fes are highly potent pro-oxidants and capable of inducing tubular and endothelial cell death, (2) markedly different toxicity profiles exist among these agents, and (3) GSH can exert protective effects. However, the latter stems from GSH's glycine content, rather than from a direct antioxidant effect. Copyright 2002 by the National Kidney Foundation, Inc.
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            Sodium ferric gluconate complex in hemodialysis patients: adverse reactions compared to placebo and iron dextran.

            Parenteral iron is often required by hemodialysis patients to maintain adequate iron stores. Until recently, the only available form of intravenous iron was iron dextran, which is associated with significant adverse reactions, including anaphylaxis and death. Sodium ferric gluconate complex (SFGC) was recently approved for use in the U.S. under FDA's priority drug review. This Phase IV study was designed to evaluate the safety of a single dose of intravenous SFGC as compared to placebo and a historical iron dextran control. This multicenter, crossover, randomized, double blind, placebo-controlled prospective comparative study was performed in hemodialysis patients requiring at least 125 mg of elemental iron. The historical control was obtained from a meta-analysis of four publications examining outcomes in patients exposed to iron dextran. SFGC naïve patients were administered SFGC without a test dose, undiluted, at a rate of 125 mg over 10 minutes, and compared to placebo comprising bacteriostatic saline. A total of 2534 patients were enrolled. The incidence of drug intolerance (an adverse event precluding re-exposure) was significantly less [0.44%, confidence interval (CI) 0.21 to 0.71%] after SFGC as compared to the iron dextran control (2.47%, CI 1.87 to 3.07%, P < 0.0001), but higher than after placebo (0.1%, P = 0.02). There was no difference found between SFGC and placebo in serious adverse events. A single life-threatening event occurred after SFGC (0.04%, CI 0.00 to 0.22%), which was significantly less than following iron dextran (0.61%, CI 0.36 to 0.86%), P = 0.0001. SFGC is well tolerated when given by intravenous push without a test dose. SFGC has a significantly lower incidence of drug intolerance and life-threatening events as compared to previous studies using iron dextran. The routine use of iron dextran in hemodialysis patients should be discontinued.
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              Sodium ferric gluconate complex in sucrose: safer intravenous iron therapy than iron dextrans.

              Use of recombinant human erythropoietin in patients with end-stage renal disease has highlighted iron deficiency as the major cause of resistant anemia. The current mainstay of intravenous (i.v.) iron replacement therapy, iron dextran, has been shown in prior studies to have a risk of serious life-threatening anaphylaxis of just under 1 per 100 patients exposed. The current study assessed the safety profile of an alternative i.v. iron, sodium ferric gluconate complex in sucrose (Ferrlecit), as compared with iron dextrans. Sodium ferric gluconate complex in sucrose, a unique chemical preparation, has been in use since 1959, principally in Europe, at a rate of approximately 2.7 million i.v. doses per year (1992 to 1996) in Germany and Italy alone. For iron dextran, usage in the United States was comparable--principally renal hemodialysis--and estimated from market sources at 3.0 million doses per year (1995). From 1976 to 1996, there were 74 allergic adverse events reported for sodium ferric gluconate complex in sucrose to the World Health Organization (WHO), German Health Bureau, and the manufacturer (all combined). For the years 1992 to 1996, sodium ferric gluconate complex in sucrose had an allergy event reporting rate of 3.3 allergy episodes per million doses per year compared with a similar rate of 8.7 reported allergy events per million doses per year for iron dextran in the United States in 1995. Case fatalities for sodium ferric gluconate complex in sucrose and iron dextran within these reports were then compared. For sodium ferric gluconate complex in sucrose, there were no reports of deaths over the entire period (1976 to 1996). However, for iron dextrans, there were 31 fatalities among 196 allergy/anaphylaxis cases reported in the United States between 1976 and 1996, yielding a case-fatality rate of 15.8%. These data show that sodium ferric gluconate complex in sucrose, when compared with iron dextrans in comparably sized patient usage populations with similar total rates of reporting of allergic events, has a significantly lower reported mortality rate (P < 0.001). Thus, the data justify usage of sodium ferric gluconate complex in sucrose as the safer iron replacement therapeutic agent.
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                Author and article information

                Journal
                NEC
                Nephron Clin Pract
                10.1159/issn.1660-2110
                Nephron Clinical Practice
                S. Karger AG
                1660-2110
                2005
                April 2005
                10 February 2005
                : 99
                : 4
                : c97-c101
                Affiliations
                Nephrology Unit, Urology and Nephrology Center, Mansoura University, Mansoura, Egypt
                Article
                83766 Nephron Clin Pract 2005;99:c97–c101
                10.1159/000083766
                15692217
                7193f0f2-dbb9-4074-a524-ec5184a270b8
                © 2005 S. Karger AG, Basel

                Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher. Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug. Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.

                History
                : 09 January 2004
                : 26 May 2004
                Page count
                Tables: 4, References: 21, Pages: 1
                Categories
                Original Paper

                Cardiovascular Medicine,Nephrology
                Iron gluconate,Hemodialysis,Parenteral iron saccharate,Anemia
                Cardiovascular Medicine, Nephrology
                Iron gluconate, Hemodialysis, Parenteral iron saccharate, Anemia

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