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1. COVID-19-related mortality in kidney transplant and haemodialysis patients

Author

Goffin, Eric, Candellier, Alexandre, Vart, Priya, Noordzij, Marlies, Arnol, Miha, Covic, Adrian, Lentini, Paolo, Malik, Shafi, Reichert, Louis J., Sever, Mehmet S., Watschinger, Bruno, Jager, Kitty J., Gansevoort, Ron T., van der Net, Jeroen B., Essig, Marie, du Buf-Vereijken, Peggy W. G., van Ginneken, Betty, Vogt, Liffert, van Jaarsveld, Brigit C., Bemelman, Frederike J., Klingenberg-Salahova, Farah, Heenan-Vos, Frederiek, Vervloet, Marc G., Nurmohamed, Azam, Abramowicz, Daniel, Verhofstede, Sabine, Maoujoud, Omar, Malfait, Thomas, Avitum, B. Braun, Fialova, Jana, Melilli, Edoardo, Favà, Alexandre, Cruzado, Josep M., Perez, Nuria Montero, Lips, Joy, Krepel, Harmen, Adilovic, Harun, Hengst, Maaike, Rydzewski, Andrzej, Gellert, Ryszard, Oliveira, João, Alferes, Daniela G., Zakharova, Elena V., Ambuehl, Patrice Max, Walker, Andrea, Winzeler, Rebecca, Lepeytre, Fanny, Rabaté, Clémentine, Rostoker, Guy, Marques, Sofia, Azasevac, Tijana, Katicic, Dajana, ten Dam, Marc, Krüger, Thilo, Brzosko, Szymon, Zanen, Adriaan L., Logtenberg, Susan J. J., Fricke, Lutz, Slebe, Jeroen J. P., Kemlin, Delphine, van de Wetering, Jacqueline, Reinders, Marlies E. J., Eiselt, Jaromir, Kielberger, Lukas, el-Wakil, Hala S., Verhoeven, Martine A. M., Canal, Cristina, Facundo, Carme, Ramos, Ana M., Debska-Slizien, Alicja, Veldhuizen, Nicoline M. H., Tigka, Eirini, Konsta, Maria Anna Polyzou, Panagoutsos, Stylianos, Mallamaci, Francesca, Matceac, Irina, Nistor, Ionut, Cordos, Monica, Groeneveld, J. H. M., Jousma, Jolanda, van Buren, Marjolijn, Elhafeez, Samar Abd, Diekmann, Fritz, Pereira, Tiago Assis, Santos, Augusto Cesar S., Arias-Cabrales, Carlos, Crespo, Marta, Llinàs-Mallol, Laura, Buxeda, Anna, Tàrrega, Carla Burballa, Redondo-Pachon, Dolores, Jimenez, Maria Dolores Arenas, Hofstra, Julia M., Franco, Antonio, Arroyo, David, Rodríguez-Ferrero, Maria Luisa, Manzanos, Sagrario Balda, Barrios, R. Haridian Sosa, Ávila, Gonçalo, Laranjinha, Ivo, Mateus, Catarina, Lemahieu, Wim, Dirim, Ahmet Burak, Demir, Erol, Å afak, Seda, Turkmen, Aydin, Hollander, Daan A. M. J., Büttner, Stefan, de Vries, Aiko P. J., Meziyerh, Soufian, van der Helm, Danny, Mallat, Marko, Bouwsma, Hanneke, Sridharan, Sivakumar, Petruliene, Kristina, Maloney, Sharon-Rose, Verberk, Iris, van der Sande, Frank M., Christiaans, Maarten H. L., Hemmelder, Marc, Kumar, Mohan N., di Luca, Marina, Tuǧlular, Serhan Z., Kramer, Andrea, Beerenhout, Charles, Luik, Peter T., Kerschbaum, Julia, Tiefenthaler, Martin, Adema, Aaltje Y., Stepanov, Vadim A., Zulkarnaev, Alexey B., Turkmen, Kultigin, Fliedner, Anselm, Åsberg, Anders, Mjoen, Geir, Miyasato, Hitoshi, de Fijter, Carola W. H., Mongera, Nicola, Pini, Stefano, de Biase, Consuelo, Duivenvoorden, Raphaël, Hilbrands, Luuk, Kerckhoffs, Angele, Maas, Rutger, Lebedeva, Olga, Lopez, Veronica, Verhave, Jacobien, Titov, Denis, Parshina, Ekaterina V., Zanoli, Luca, Marcantoni, Carmelita, van Gils-Verrij, Liesbeth E. A., Harty, John C., Meurs, Marleen, Myslak, Marek, Battaglia, Yuri, den Deurwaarder, Edwin, Stendahl, Maria, Rahimzadeh, Hormat, Schouten, Marcel, Rychlik, Ivan, Cabezas-Reina, Carlos J., Roca, Ana Maria, Nauta, Ferdau, Kanaan, Nada, Labriola, Laura, Devresse, Arnaud, Diaz-Mareque, Anabel, Coca, Armando, Meijers, Björn K. I., Naesens, Maarten, Kuypers, Dirk, Desschans, Bruno, Tonnelier, Annelies, Wissing, Karl M., de Arriba, Gabriel, Dedinska, Ivana, Pessolano, Giuseppina, Gandolfini, Ilaria, Maggiore, Umberto, Papachristou, Evangelos, Franssen, Casper F. M., Berger, Stefan P., Meijer, Esther, Özyilmaz, Akin, Sanders, Jan Stephan F., Ponikvar, Jadranka Buturović, Pernat, Andreja Marn, Kovac, Damjan, Ekart, Robert, Abrahams, Alferso C., Molenaar, Femke M., van Zuilen, Arjan D., Meijvis, Sabine C. A., Dolmans, Helma, Tantisattamos, Ekamol, Esposito, Pasquale, Krzesinski, Jean-Marie, Barahira, Jean Damacène, Gallieni, Maurizio, Sabiu, Gianmarco, Martin-Moreno, Paloma Leticia, Guglielmetti, Gabriele, Guzzo, Gabriella, Toapanta, Nestor, Luik, Antinus J., van Kuijk, Willi H. M., Stikkelbroeck, Lonneke W. H., Hermans, Marc M. H., Rimsevicius, Laurynas, Righetti, Marco, Islam, Mahmud, Braak, Nicole Heitink-Ter, UCL - SSS/IREC/NEFR - Pôle de Néphrologie, UCL - (SLuc) Service de néphrologie, Internal Medicine, Clinical sciences, Nephrology, ACS - Diabetes & metabolism, AII - Inflammatory diseases, AII - Infectious diseases, Groningen Kidney Center (GKC), Cardiovascular Centre (CVC), Medical Informatics, ACS - Pulmonary hypertension & thrombosis, APH - Aging & Later Life, APH - Quality of Care, ACS - Microcirculation, APH - Health Behaviors & Chronic Diseases, and APH - Global Health

Subjects
medicine.medical_specialty, kidney, Original Article - Dialysis, medicine.medical_treatment, infectious diseases, law.invention, Kidney Failure, SDG 3 - Good Health and Well-being, Renal Dialysis, Risk Factors, law, Internal medicine, medicine, Humans, COVID-19, dialysis, mortality, transplantation, Registries, Renal replacement therapy, Chronic, AcademicSubjects/MED00340, Kidney transplantation, Dialysis, Transplantation, SARS-CoV-2, business.industry, Kidney Transplantation/adverse effects, Hazard ratio, medicine.disease, Kidney Transplantation, Intensive care unit, Comorbidity, Transplant Recipients, Renal disorders Radboud Institute for Molecular Life Sciences [Radboudumc 11], Kidney Failure, Chronic/therapy, Nephrology, Kidney Failure, Chronic, Hemodialysis, Renal disorders Radboud Institute for Health Sciences [Radboudumc 11], business
Abstract

BACKGROUND AND AIMS: Studies examining kidney failure patients with COVID-19 reported higher mortality in hemodialysis patients than in kidney transplant recipients. However, hemodialysis patients are often older and have more comorbidities. This study investigated the association of type of kidney replacement therapy with COVID-19 severity adjusting for differences in characteristics. METHOD: Data were retrieved from the European Renal Association COVID-19 Database (ERACODA), which includes kidney replacement therapy patients diagnosed with COVID-19 from all over Europe. We included all kidney transplant recipients and hemodialysis patients who presented between February 1st and December 1st 2020 and had complete information reason for COVID-19 screening and vital status at day 28. The diagnosis of COVID-19 was made based on a PCR of a nasal or pharyngeal swab specimens and/or COVID-19 compatible findings on a lung CT scan. The association of kidney transplantation or hemodialysis with 28-day mortality was examined using Cox proportional-hazards regression models adjusted for age, sex, frailty and comorbidities. Additionally, this association was investigated in the subsets of patients that were screened because of symptoms or have had routine screening. RESULTS: A total of 1,670 patients (496 functional kidney transplant recipients and 1,174 hemodialysis patients) were examined. 16.9% of kidney transplant recipients and 23.9% of hemodialysis patients died within 28 days of presentation. In an unadjusted model, the risk of 28-day mortality was 33% lower in kidney transplant recipients compared with hemodialysis patients (hazard ratio (HR): 0.67, 95% CI: 0.52, 0.85). However, in an age, sex and frailty adjusted model, the risk of 28-day mortality was 29% higher in kidney transplant recipients (HR=1.29, 95% CI: 1.00, 1.68), whereas in a fully adjusted model the risk was even 43% higher (HR=1.43, 95% CI: 1.06, 1.93). This association in patients who were screened because of symptoms (n=1,145) was similar (fully adjusted model HR=1.46, 95% CI: 1.05, 2.04). Results were similar when other endpoints were studied (e.g. risk for hospitalization, ICU admission or mortality beyond 28 days) as well as across subgroups. Only age was found to interact significantly, suggesting that the increased mortality risk associated with kidney transplantation was especially present in elderly subjects. CONCLUSION: In this study, kidney transplant recipients had a greater risk of a more severe course of COVID-19 compared with hemodialysis patients when adjusted for age, sex and comorbidities.

Published
2021
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4. Haemodynamic or metabolic stimulation tests to reveal the renal functional response: requiem or revival?

Author

Moor, Bart De, Vanwalleghem, Johan F, Swennen, Quirine, Stas, Koen J, and Meijers, Björn K I

Abstract

Renal stimulation tests document the dynamic response of the glomerular filtration rate (GFR) after a single or a combination of stimuli, such as an intravenous infusion of dopamine or amino acids or an oral protein meal. The increment of the GFR above the unstimulated state has formerly been called the renal functional reserve (RFR). Although the concept of a renal reserve capacity has not withstood scientific scrutiny, the literature documenting renal stimulation merits renewed interest. An absent or a blunted response of the GFR after a stimulus indicates lost or diseased nephrons. This information is valuable in preventing, diagnosing and prognosticating acute kidney injury and pregnancy-related renal events as well as chronic kidney disease. However, before renal function testing is universally practiced, some shortcomings must be addressed. First, a common nomenclature should be decided upon. The expression of RFR should be replaced by renal functional response. Second, a simple protocol must be developed and propagated. Third, we suggest designing prospective studies linking a defective stimulatory response to emergence of renal injury biomarkers, to histological or morphological renal abnormalities and to adverse renal outcomes in different renal syndromes. [ABSTRACT FROM AUTHOR]

Published
2018
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5. Effect of Treatment Duration and Frequency on Uremic Solute Kinetics, Clearances and Concentrations.

Author

Leypoldt, John K. and Meijers, Björn K. I.

Subjects
*URODYNAMICS, *HEMODIALYSIS, *MICROGLOBULINS, *HEALTH outcome assessment, *PHOSPHORUS in the body, *DYNAMICS, *KIDNEY function tests, *DIETARY proteins, *UREA
Abstract

The kinetics of uremic solute clearances are discussed based on two categories of uremic solutes, namely those that are and those that are not derived directly from nutrient intake, particularly dietary protein intake. This review highlights dialysis treatments that are more frequent and longer (high-dose hemodialysis) than conventional thrice weekly therapy. It is proposed that the dialysis dose measures based on urea as a marker uremic solute, such as Kt/V and stdKt/V, be referred to as measures of dialysis inadequacy, not dialysis adequacy. For uremic solutes derived directly from nutrient intake, it is suggested that inorganic phosphorus and protein-bound uremic solutes be considered as markers in the development of alternative measures of dialysis dose for high-dose hemodialysis prescriptions. As the current gap in understanding the detailed kinetics of protein-bound uremic solutes, it is proposed that normalization of serum phosphorus concentration with a minimum (or preferably without a) need for oral-phosphorus binders be targeted as a measure of dialysis adequacy in high-dose hemodialysis. For large uremic solutes not derived directly from nutrient intake (middle molecules), use of extracorporeal clearances for β2 -microglobulin that are higher than currently available during thrice weekly therapy is unlikely to reduce predialysis serum β2 -microglobulin concentrations. High-dose hemodialysis prescriptions will lead to reductions in predialysis serum β2 -microglobulin concentrations, but such reductions are also limited by significant residual kidney clearance. Kinetic data regarding middle molecules larger than β2 -microglobulin are scarce; additional studies on such uremic solutes are of high interest to better understand improved methods for prescribing high-dose hemodialysis prescriptions to improve patient outcomes. [ABSTRACT FROM AUTHOR]

Published
2016
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7. p-Cresyl sulfate serum concentrations in haemodialysis patients are reduced by the prebiotic oligofructose-enriched inulin.

Author

Meijers, Björn K. I., De Preter, Vicky, Verbeke, Kristin, Vanrenterghem, Yves, and Evenepoel, Pieter

Subjects
*HEMODIALYSIS patients, *INULIN, *SERUM, *SULFATES, *CARDIOVASCULAR diseases, *ALBUMINS, *PERITONEAL dialysis
Abstract

Introduction. Protein-bound uraemic retention solutes, including p-cresyl sulfate and indoxyl sulfate, contribute substantially to the uraemic syndrome. These and several other uraemic retention solutes originate from intestinal bacterial protein fermentation. We investigated whether the prebiotic oligofructose-enriched inulin reduced serum concentration of p-cresyl sulfate and indoxyl sulfate, through interference with intestinal generation. [ABSTRACT FROM PUBLISHER]

Published
2010
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8. Heparin-coated dialyzer membranes: is non-inferiority good enough?

Author

Meijers, Björn K I, Poesen, Ruben, and Evenepoel, Pieter

Subjects
*HEPARIN, *HEMODIALYZERS, *BLOOD coagulation, *HEMORRHAGE, *CITRATES
Abstract

Evidence on the optimal anticoagulation regimen for hemodialysis in patients at high bleeding risk is scarce. The HepZero study is the first large multinational study comparing two different anticoagulation strategies to avoid systemic heparinization. The use of a heparin-coated dialysis membrane proved to be non-inferior to saline infusion. Superiority of either treatment, however, could not be demonstrated. These findings challenge current guidelines but equally raise questions on the choice of either strategy as compared with regional citrate anticoagulation. [ABSTRACT FROM AUTHOR]

Published
2014
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