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Martino FK, di Vico V, Basso A, Gobbi L, Stefanelli LF, Cacciapuoti M, Bettin E, Del Prete D, Scaparrotta G, Nalesso F, Calò LA. The Role of Daily Dialysate Calcium Exposure in Phosphaturic Hormones in Dialysis Patients. Life (Basel) 2024; 14:964. [PMID: 39202706 PMCID: PMC11355329 DOI: 10.3390/life14080964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2024] [Revised: 07/21/2024] [Accepted: 07/26/2024] [Indexed: 09/03/2024] Open
Abstract
Managing mineral bone disease (MBD) could reduce cardiovascular risk and improve the survival of dialysis patients. Our study focuses on the impact of calcium bath exposure in dialysis patients by comparing peritoneal dialysis patients (PD, intervention group) and hemodialysis patients (HD, control group). We assessed various factors, including calcium, phosphorus, magnesium, PTH, vitamin D 25-OH, C-terminal telopeptide (CTX), and FGF-23 levels, as well as the calcium bath six hours before the blood sample and the length of daily calcium exposure. We enrolled 40 PD and 31 HD patients with a mean age of 68.7 ± 13.6 years. Our cohort had median PTH and FGF-23 levels of 194 ng/L (Interquartile range [IQR] 130-316) and 1296 pg/mL (IQR 396-2698), respectively. We identified the length of exposure to a 1.25 mmol/L calcium bath, phosphate levels, and CTX as independent predictors of PTH (OR 0.279, p = 0.011; OR 0.277, p = 0.012; OR 0.11, p = 0.01, respectively). In contrast, independent predictors of FGF-23 were phosphate levels (OR 0.48, p < 0.001) and serum calcium levels (OR 0.25, p = 0.015), which were affected by the calcium bath. These findings suggest that managing dialysate calcium baths impacts phosphaturic hormones and could be a critical factor in optimizing CKD-MBD treatment in PD patients, sparking a new avenue of research and potential interventions.
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Affiliation(s)
- Francesca K. Martino
- Nephrology, Dialysis and Transplantation Unit, Department of Medicine (DIMED), University of Padova, 35128 Padua, Italy; (V.d.V.); (A.B.); (L.G.); (L.F.S.); (M.C.); (E.B.); (D.D.P.); (G.S.); (L.A.C.)
| | | | | | | | | | | | | | | | | | - Federico Nalesso
- Nephrology, Dialysis and Transplantation Unit, Department of Medicine (DIMED), University of Padova, 35128 Padua, Italy; (V.d.V.); (A.B.); (L.G.); (L.F.S.); (M.C.); (E.B.); (D.D.P.); (G.S.); (L.A.C.)
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Nagy E, Sobh MM, Abdalbary M, Elnagar S, Elrefaey R, Shabaka S, Elshabrawy N, Shemies R, Tawfik M, Santos CGS, Barreto FC, El-Husseini A. Is Adynamic Bone Always a Disease? Lessons from Patients with Chronic Kidney Disease. J Clin Med 2022; 11:jcm11237130. [PMID: 36498703 PMCID: PMC9736225 DOI: 10.3390/jcm11237130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 11/28/2022] [Indexed: 12/04/2022] Open
Abstract
Renal osteodystrophy (ROD) is a common complication of end-stage kidney disease that often starts early with loss of kidney function, and it is considered an integral part in management of patients with chronic kidney disease (CKD). Adynamic bone (ADB) is characterized by suppressed bone formation, low cellularity, and thin osteoid seams. There is accumulating evidence supporting increasing prevalence of ADB, particularly in early CKD. Contemporarily, it is not very clear whether it represents a true disease, an adaptive mechanism to prevent bone resorption, or just a transitional stage. Several co-players are incriminated in its pathogenesis, such as age, diabetes mellitus, malnutrition, uremic milieu, and iatrogenic factors. In the present review, we will discuss the up-to-date knowledge of the ADB and focus on its impact on bone health, fracture risk, vascular calcification, and long-term survival. Moreover, we will emphasize the proper preventive and management strategies of ADB that are pivotal issues in managing patients with CKD. It is still unclear whether ADB is always a pathologic condition or whether it can represent an adaptive process to suppress bone resorption and further bone loss. In this article, we tried to discuss this hard topic based on the available limited information in patients with CKD. More studies are needed to be able to clearly address this frequent ROD finding.
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Affiliation(s)
- Eman Nagy
- Mansoura Nephrology and Dialysis Unit, Mansoura University, Mansoura 35516, Egypt
| | - Mahmoud M. Sobh
- Mansoura Nephrology and Dialysis Unit, Mansoura University, Mansoura 35516, Egypt
| | - Mohamed Abdalbary
- Mansoura Nephrology and Dialysis Unit, Mansoura University, Mansoura 35516, Egypt
| | - Sherouk Elnagar
- Mansoura Nephrology and Dialysis Unit, Mansoura University, Mansoura 35516, Egypt
| | - Rabab Elrefaey
- Mansoura Nephrology and Dialysis Unit, Mansoura University, Mansoura 35516, Egypt
| | - Shimaa Shabaka
- Mansoura Nephrology and Dialysis Unit, Mansoura University, Mansoura 35516, Egypt
| | - Nehal Elshabrawy
- Mansoura Nephrology and Dialysis Unit, Mansoura University, Mansoura 35516, Egypt
| | - Rasha Shemies
- Mansoura Nephrology and Dialysis Unit, Mansoura University, Mansoura 35516, Egypt
| | - Mona Tawfik
- Mansoura Nephrology and Dialysis Unit, Mansoura University, Mansoura 35516, Egypt
| | - Cássia Gomes S. Santos
- Department of Internal Medicine, Division of Nephrology, Federal University of Paraná, Curitiba 80060-00, PR, Brazil
| | - Fellype C. Barreto
- Department of Internal Medicine, Division of Nephrology, Federal University of Paraná, Curitiba 80060-00, PR, Brazil
| | - Amr El-Husseini
- Division of Nephrology & Bone and Mineral Metabolism, University of Kentucky, Lexington, KY 40536-0298, USA
- Correspondence: ; Tel.: +1-859-218-0934; Fax: +1-859-323-0232
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Ok E, Asci G, Bayraktaroglu S, Toz H, Ozkahya M, Yilmaz M, Kircelli F, Sevinc Ok E, Ceylan N, Duman S, Cirit M, Monier-Faugere MC, Malluche HH. Reduction of Dialysate Calcium Level Reduces Progression of Coronary Artery Calcification and Improves Low Bone Turnover in Patients on Hemodialysis. J Am Soc Nephrol 2015; 27:2475-86. [PMID: 26701977 DOI: 10.1681/asn.2015030268] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 11/04/2015] [Indexed: 01/24/2023] Open
Abstract
Exposure to high Ca concentrations may influence the development of low-turnover bone disease and coronary artery calcification (CAC) in patients on hemodialysis (HD). In this randomized, controlled study, we investigated the effects of lowering dialysate Ca level on progression of CAC and histologic bone abnormalities in patients on HD. Patients on HD with intact parathyroid hormone levels ≤300 pg/ml receiving dialysate containing 1.75 or 1.50 mmol/L Ca (n=425) were randomized to the 1.25-mmol/L Ca (1.25 Ca; n=212) or the 1.75-mmol/L Ca (1.75 Ca; n=213) dialysate arm. Primary outcome was a change in CAC score measured by multislice computerized tomography; main secondary outcome was a change in bone histomorphometric parameters determined by analysis of bone biopsy specimens. CAC scores increased from 452±869 (mean±SD) in the 1.25 Ca group and 500±909 in the 1.75 Ca group (P=0.68) at baseline to 616±1086 and 803±1412, respectively, at 24 months (P=0.25). Progression rate was significantly lower in the 1.25 Ca group than in the 1.75 Ca group (P=0.03). The prevalence of histologically diagnosed low bone turnover decreased from 85.0% to 41.8% in the 1.25 Ca group (P=0.001) and did not change in the 1.75 Ca group. At 24 months, bone formation rate, trabecular thickness, and bone volume were higher in the 1.25 Ca group than in the 1.75 Ca group. Thus, lowering dialysate Ca levels slowed the progression of CAC and improved bone turnover in patients on HD with baseline intact parathyroid hormone levels ≤300 pg/ml.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Naim Ceylan
- Department of Radiology, Ege University School of Medicine, Izmir, Turkey
| | | | - Mustafa Cirit
- Division of Nephrology, Ataturk Training and Research Hospital, Izmir, Turkey; and
| | | | - Hartmut H Malluche
- Division of Nephrology, Bone and Mineral Metabolism, University of Kentucky, Lexington, Kentucky
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Bover J, Ureña P, Brandenburg V, Goldsmith D, Ruiz C, DaSilva I, Bosch RJ. Adynamic bone disease: from bone to vessels in chronic kidney disease. Semin Nephrol 2015; 34:626-40. [PMID: 25498381 DOI: 10.1016/j.semnephrol.2014.09.008] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Adynamic bone disease (ABD) is a well-recognized clinical entity in the complex chronic kidney disease (CKD)-mineral and bone disorder. Although the combination of low intact parathyroid hormone (PTH) and low bone alkaline phosphatase levels may be suggestive of ABD, the gold standard for precise diagnosis is histomorphometric analysis of tetracycline double-labeled bone biopsies. ABD essentially is characterized by low bone turnover, low bone volume, normal mineralization, and markedly decreased cellularity with minimal or no fibrosis. ABD is increasing in prevalence relative to other forms of renal osteodystrophy, and is becoming the most frequent type of bone lesion in some series. ABD develops in situations with reduced osteoanabolic stimulation caused by oversuppression of PTH, multifactorial skeletal resistance to PTH actions in uremia, and/or dysregulation of Wnt signaling. All may contribute not only to bone disease but also to the early vascular calcification processes observed in CKD. Various risk factors have been linked to ABD, including calcium loading, ageing, diabetes, hypogonadism, parathyroidectomy, peritoneal dialysis, and antiresorptive therapies, among others. The relationship between low PTH level, ABD, increased risk fracture, and vascular calcifications may at least partially explain the association of ABD with increased mortality rates. To achieve optimal bone and cardiovascular health, attention should be focused not only on classic control of secondary hyperparathyroidism but also on prevention of ABD, especially in the steadily growing proportions of diabetic, white, and elderly patients. Overcoming the insufficient osteoanabolic stimulation in ABD is the ultimate treatment goal.
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Affiliation(s)
- Jordi Bover
- Fundació Puigvert, Department of Nephrology, IIB Sant Pau, RedinRen, Barcelona, Catalonia, Spain.
| | - Pablo Ureña
- Department of Nephrology and Dialysis, Clinique du Landy, Department of Renal Physiology, Necker Hospital, University of Paris Descartes, Paris, France
| | - Vincent Brandenburg
- Department of Cardiology and Intensive Care Medicine, Rheinisch-Westfälische Technische Hochschule (RWTH) University Hospital, Aachen, Germany
| | - David Goldsmith
- King's Health Partners Academic Health Sciences Centre (AHSC), London, United Kingdom
| | - César Ruiz
- Fundació Puigvert, Department of Nephrology, IIB Sant Pau, RedinRen, Barcelona, Catalonia, Spain
| | - Iara DaSilva
- Fundació Puigvert, Department of Nephrology, IIB Sant Pau, RedinRen, Barcelona, Catalonia, Spain
| | - Ricardo J Bosch
- Fundació Puigvert, Department of Nephrology, IIB Sant Pau, RedinRen, Barcelona, Catalonia, Spain
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Brandenburg VM, Floege J. Adynamic bone disease-bone and beyond. NDT Plus 2015; 1:135-47. [PMID: 25983860 PMCID: PMC4421169 DOI: 10.1093/ndtplus/sfn040] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2008] [Accepted: 03/18/2008] [Indexed: 11/13/2022] Open
Affiliation(s)
- Vincent M Brandenburg
- Department of Nephrology and Clinical Immunology , RWTH University Hospital Aachen , Pauwelsstrasse 30, Aachen, D-52057 , Germany
| | - Jürgen Floege
- Department of Nephrology and Clinical Immunology , RWTH University Hospital Aachen , Pauwelsstrasse 30, Aachen, D-52057 , Germany
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Langote A, Ahearn M, Zimmerman D. Dialysate Calcium Concentration, Mineral Metabolism Disorders, and Cardiovascular Disease: Deciding the Hemodialysis Bath. Am J Kidney Dis 2015; 66:348-58. [PMID: 25958080 DOI: 10.1053/j.ajkd.2015.02.336] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Accepted: 02/04/2015] [Indexed: 11/11/2022]
Abstract
Patients with end-stage kidney disease treated with dialysis are at increased risk to experience fractures and cardiovascular events than similar-aged people from the general population. The enhanced risk for these outcomes in dialysis patients is not completely explained by traditional risk factors for osteoporosis and cardiovascular disease. Mineral metabolism abnormalities are almost universal by the time patients require dialysis therapy, with most patients having some type of renal osteodystrophy and vascular calcification. These abnormalities have been linked to adverse skeletal and cardiovascular events. However, it has become clear that the treatment regimens used to modify the serum calcium, phosphate, and parathyroid hormone levels almost certainly contribute to the poor outcomes for dialysis patients. In this article, we focus on one aspect of mineral metabolism management; dialysate calcium concentration and the relationships among dialysate calcium concentrations, mineral and bone disorder, and cardiovascular disease in hemodialysis patients.
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Affiliation(s)
- Amit Langote
- Division of Nephrology, Department of Medicine, University of Ottawa, Ottawa Hospital, Ottawa, Ontario, Canada
| | - Micayla Ahearn
- Department of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Deborah Zimmerman
- Division of Nephrology, Department of Medicine, University of Ottawa, Ottawa Hospital, Ottawa, Ontario, Canada; Kidney Research Centre, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada.
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Lindley EJ. SHOULD DIALYSATE CALCIUM CONCENTRATION BE STANDARDISED OR INDIVIDUALISED? J Ren Care 2009; 35 Suppl 1:101-6. [DOI: 10.1111/j.1755-6686.2009.00053.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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