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Shockey W, Wiegel JJ, Parajuli S, Garg N, Swanson KJ, Mandelbrot DA. Potassium-lowering effects of sodium zirconium cyclosilicate in the early post-transplant period. Clin Transplant 2024; 38:e15156. [PMID: 37812572 DOI: 10.1111/ctr.15156] [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: 07/20/2023] [Revised: 09/08/2023] [Accepted: 09/24/2023] [Indexed: 10/11/2023]
Abstract
PROBLEM Hyperkalemia is a serious condition among intra-abdominal transplant recipients, and the safety and efficacy of sodium zirconium cyclosilicate (SZC) for its management during the early post-transplant period are not well-established. METHODS Adults who received at least one 10-g dose of SZC within 14 days after an intra-abdominal transplant between January 2020 and July 2022 were included in our study. The primary outcome was the change in potassium (K+) levels following the first SZC dose. Other analyses explored adjunctive potassium-lowering therapies, potential gastrointestinal complications, and patient subgroups based on therapy and transplant type. RESULTS Among the recipients (n = 46), 11 were kidney recipients, 26 were liver recipients, seven were simultaneous liver/kidney recipients, and two were simultaneous pancreas/kidney recipients. The mean time to first dose post-transplant was 7.6 (±4) days, and the mean change in serum K+ after the initial SZC dose was -.27 mEq (p = .001). No gastrointestinal complications were observed following the SZC dose. The mean increase in serum bicarbonate was .58 mEq (p = .41) following the first dose of SZC. Four kidney recipients required dialysis following the SZC dose. CONCLUSION This study represents the largest investigation on the use of SZC in transplant recipients. A single 10-g dose of SZC reduced serum K+ levels in all subgroups, while the use of adjunctive K+-lowering therapies did not provide additional reduction beyond the effects of SZC. Importantly, no gastrointestinal complications were observed. These findings suggest that SZC may be a safe and promising therapeutic option for hyperkalemia management following solid organ transplantation.
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Affiliation(s)
- William Shockey
- Department of Pharmacy, University of Wisconsin Hospital and Clinics, Madison, Wisconsin, USA
| | - Joshua J Wiegel
- Department of Pharmacy, University of Wisconsin Hospital and Clinics, Madison, Wisconsin, USA
| | - Sandesh Parajuli
- Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Neetika Garg
- Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Kurtis J Swanson
- Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Didier A Mandelbrot
- Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
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2
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Rizk JG, Lazo JG, Quan D, Gabardi S, Rizk Y, Streja E, Kovesdy CP, Kalantar-Zadeh K. Mechanisms and management of drug-induced hyperkalemia in kidney transplant patients. Rev Endocr Metab Disord 2021; 22:1157-1170. [PMID: 34292479 DOI: 10.1007/s11154-021-09677-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/16/2021] [Indexed: 10/20/2022]
Abstract
Hyperkalemia is a common and potentially life-threatening complication following kidney transplantation that can be caused by a composite of factors such as medications, delayed graft function, and possibly potassium intake. Managing hyperkalemia after kidney transplantation is associated with increased morbidity and healthcare costs, and can be a cause of multiple hospital admissions and barriers to patient discharge. Medications used routinely after kidney transplantation are considered the most frequent culprit for post-transplant hyperkalemia in recipients with a well-functioning graft. These include calcineurin inhibitors (CNIs), pneumocystis pneumonia (PCP) prophylactic agents, and antihypertensives (angiotensin-converting enzyme inhibitors, angiotensin receptor blockers, beta blockers). CNIs can cause hyperkalemic renal tubular acidosis. When hyperkalemia develops following transplantation, the potential offending medication may be discontinued, switched to another agent, or dose-reduced. Belatacept and mTOR inhibitors offer an alternative to calcineurin inhibitors in the event of hyperkalemia, however should be prescribed in the appropriate patient. While trimethoprim/sulfamethoxazole (TMP/SMX) remains the gold standard for prevention of PCP, alternative agents (e.g. dapsone, atovaquone) have been studied and can be recommend in place of TMP/SMX. Antihypertensives that act on the Renin-Angiotensin-Aldosterone System are generally avoided early after transplant but may be indicated later in the transplant course for patients with comorbidities. In cases of mild to moderate hyperkalemia, medical management can be used to normalize serum potassium levels and allow the transplant team additional time to evaluate the function of the graft. In the immediate post-operative setting following kidney transplantation, a rapidly rising potassium refractory to medical therapy can be an indication for dialysis. Patiromer and sodium zirconium cyclosilicate (ZS-9) may play an important role in the management of chronic hyperkalemia in kidney transplant patients, although additional long-term studies are necessary to confirm these effects.
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Affiliation(s)
- John G Rizk
- Arizona State University, Edson College, Phoenix, AZ, USA.
| | - Jose G Lazo
- UCSF Medical Center, University of California San Francisco, San Francisco, CA, USA
| | - David Quan
- UCSF Medical Center, University of California San Francisco, San Francisco, CA, USA
| | - Steven Gabardi
- Department of Transplant Surgery, Brigham and Women's Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - Youssef Rizk
- Department of Internal Medicine, Division of Family Medicine, Lebanese American University Medical Center - St. John's Hospital, Beirut, Lebanon
| | - Elani Streja
- Department of Medicine, Division of Nephrology, Hypertension and Kidney Transplantation, School of Medicine, University of California, CA, Irvine, Orange, USA
| | - Csaba P Kovesdy
- Division of Nephrology, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Kamyar Kalantar-Zadeh
- Department of Medicine, Division of Nephrology, Hypertension and Kidney Transplantation, School of Medicine, University of California, CA, Irvine, Orange, USA
- Department of Epidemiology, University of California, UCLA Fielding School of Public Health, Los Angeles, CA, USA
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Swanson KJ, Aziz F, Parajuli S, Mohamed M, Mandelbrot DA, Djamali A, Garg N. Sodium zirconium cyclosilicate use in kidney transplant recipients. Nephrol Dial Transplant 2021; 36:2151-2153. [PMID: 33914876 DOI: 10.1093/ndt/gfab172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Indexed: 11/13/2022] Open
Affiliation(s)
- Kurtis J Swanson
- Division of Nephrology, Department of Medicine, University of Wisconsin and Public Health, Madison, WI, USA
| | - Fahad Aziz
- Division of Nephrology, Department of Medicine, University of Wisconsin and Public Health, Madison, WI, USA
| | - Sandesh Parajuli
- Division of Nephrology, Department of Medicine, University of Wisconsin and Public Health, Madison, WI, USA
| | - Maha Mohamed
- Division of Nephrology, Department of Medicine, University of Wisconsin and Public Health, Madison, WI, USA
| | - Didier A Mandelbrot
- Division of Nephrology, Department of Medicine, University of Wisconsin and Public Health, Madison, WI, USA
| | - Arjang Djamali
- Division of Nephrology, Department of Medicine, University of Wisconsin and Public Health, Madison, WI, USA.,Division of Transplant Surgery, Department of Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Neetika Garg
- Division of Nephrology, Department of Medicine, University of Wisconsin and Public Health, Madison, WI, USA
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Morales E, Cravedi P, Manrique J. Management of Chronic Hyperkalemia in Patients With Chronic Kidney Disease: An Old Problem With News Options. Front Med (Lausanne) 2021; 8:653634. [PMID: 34150795 PMCID: PMC8213200 DOI: 10.3389/fmed.2021.653634] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 05/04/2021] [Indexed: 12/11/2022] Open
Abstract
Hyperkalemia is one of the main electrolyte disorders in patients with chronic kidney disease (CKD). The prevalence of hyperkalemia increases as the Glomerular Filtration Rate (GFR) declines. Although chronic hyperkalemia is not a medical emergency, it can have negative consequences for the adequate cardio-renal management in the medium and long term. Hyperkalemia is common in patients on renin-angiotensin-aldosterone system inhibitors (RAASi) or Mineralocorticoid Receptor Antagonists (MRAs) and can affect treatment optimization for hypertension, diabetes mellitus, heart failure (HF), and CKD. Mortality rates are higher with suboptimal dosing among patients with CKD, diabetes or HF compared with full RAASi dosing, and are the highest among patients who discontinue RAASis. The treatment of chronic hyperkalemia is still challenging. Therefore, in the real world, discontinuation or reduction of RAASi therapy may lead to adverse cardiorenal outcomes, and current guidelines differ with regard to recommendations on RAASi therapy to enhance cardio and reno-protective effects. Treatment options for hyperkalemia have not changed much since the introduction of the cation exchange resin over 50 years ago. Nowadays, two new potassium binders, Patiromer Sorbitex Calcium, and Sodium Zirconium Cyclosilicate (SZC) already approved by FDA and by the European Medicines Agency, have demonstrated their clinical efficacy in reducing serum potassium with a good safety profile. The use of the newer potassium binders may allow continuing and optimizing RAASi therapy in patients with hyperkalemia keeping the cardio-renal protective effect in patients with CKD and cardiovascular disease. However, further research is needed to address some questions related to potassium disorders (definition of chronic hyperkalemia, monitoring strategies, prediction score for hyperkalemia or length for treatment).
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Affiliation(s)
- Enrique Morales
- Department of Nephrology, Hospital Universitario 12 de Octubre, Madrid, Spain
- Instituto de Investigación Hospital Universitario 12 de Octubre (imas12), Madrid, Spain
- Department of Medicine, Universidad Complutense de Madrid, Madrid, Spain
| | - Paolo Cravedi
- Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Joaquin Manrique
- Nephrology Department, Complejo Hospitalario de Navarra, Pamplona, Spain
- Navarra Institute for Health Research, IdiSNA, Pamplona, Spain
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Almalki B, Cunningham K, Kapugi M, Kane C, Agrawal A. Management of hyperkalemia: A focus on kidney transplant recipients. Transplant Rev (Orlando) 2021; 35:100611. [PMID: 33711778 DOI: 10.1016/j.trre.2021.100611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 02/19/2021] [Accepted: 02/23/2021] [Indexed: 11/15/2022]
Abstract
Hyperkalemia is a frequent complication among kidney transplant recipients that can lead to fatal arrhythmias. The causes of hyperkalemia post kidney transplant are multifactorial and often are drug-induced, and include decreased glomerular filtration rate, tubular dysfunction, and impaired sodium delivery in the distal nephron. This review will discuss pathophysiology and recent updates in the management of both acute and chronic hyperkalemia with a focus on kidney transplant recipients.
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Affiliation(s)
- Bassem Almalki
- Department of Pharmacy, Northwestern Memorial Hospital, Chicago, IL, United States.
| | - Kathleen Cunningham
- Department of Pharmacy, Northwestern Memorial Hospital, Chicago, IL, United States
| | - Michelle Kapugi
- Department of Pharmacy, Northwestern Memorial Hospital, Chicago, IL, United States
| | - Clare Kane
- Department of Pharmacy, Northwestern Memorial Hospital, Chicago, IL, United States
| | - Akansha Agrawal
- Department of Nephrology, Northwestern Memorial Hospital, Chicago, IL, United States
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Rizk J, Quan D, Gabardi S, Rizk Y, Kalantar-Zadeh K. Novel approaches to management of hyperkalaemia in kidney transplantation. Curr Opin Nephrol Hypertens 2021; 30:27-37. [PMID: 33027094 DOI: 10.1097/mnh.0000000000000657] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
PURPOSE OF REVIEW Medications used frequently after kidney transplantation, including calcineurin inhibitors, angiotensin-converting enzyme inhibitors, angiotensin receptor blockers, beta blockers and antimicrobials, are considered the leading culprit for posttransplant hyperkalaemia in recipients with a well functioning allograft. Other risk factors include comorbidities such as diabetes, hypertension and heart failure; and consumption of a potassium-enriched diet. We review the mechanisms for hyperkalaemia following kidney transplantation that are addressed using nonpharmacological and pharmacological interventions. We also discuss emerging therapeutic approaches for the management of recurrent hyperkalaemia in solid organ transplantation, including newer potassium binding therapies. RECENT FINDINGS Patiromer and sodium zirconium cyclosilicate are emerging potassium binders approved for the treatment of hyperkalaemia. Patiromer is a polymer that exchanges potassium for calcium ions. In contrast, sodium zirconium cyclosilicate is a nonpolymer compound that exchanges potassium for sodium and hydrogen ions. Both agents are efficacious in the treatment of chronic or recurrent hyperkalaemia and may result in fewer gastrointestinal side effects than older potassium binders such as sodium polystyrene sulfonate and calcium polystyrene sulfonate. Large-scale clinical studies have not been performed in kidney transplant patients. Patiromer may increase serum concentrations of tacrolimus, but not cyclosporine. Sodium zirconium cyclosilicate does not appear to compromise tacrolimus pharmacokinetics, although it may have a higher sodium burden. SUMMARY Patiromer and sodium zirconium cyclosilicate may be well tolerated options to treat asymptomatic hyperkalaemia and have the potential to ease potassium dietary restrictions in kidney transplant patients by maintaining a plant-dominant, heart-healthy diet. Their efficacy, better tolerability and comparable cost with respect to previously available potassium binders make them an attractive therapeutic option in chronic hyperkalaemia following kidney transplantation.
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Affiliation(s)
- John Rizk
- Arizona State University, Edson College, Phoenix, Arizona
| | - David Quan
- UCSF Medical Center, University of California San Francisco, San Francisco, California
| | - Steven Gabardi
- Department of Transplant Surgery, Brigham and Women's Hospital
- Department of Medicine, Harvard Medical School, Boston, Massachusetts
| | - Youssef Rizk
- Department of Family Medicine, American University of Beirut Medical Center, Beirut, Lebanon
| | - Kamyar Kalantar-Zadeh
- Division of Nephrology, Hypertension and Kidney Transplantation, University of California Irvine School of Medicine, Orange
- Department of Epidemiology, University of California, Los Angeles, UCLA Fielding School of Public Health, Los Angeles, California, USA
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