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Afsar B, Afsar RE, Caliskan Y, Lentine KL. A holistic review of sodium intake in kidney transplant patients: More questions than answers. Transplant Rev (Orlando) 2024; 38:100859. [PMID: 38749098 DOI: 10.1016/j.trre.2024.100859] [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: 04/06/2024] [Revised: 05/09/2024] [Accepted: 05/10/2024] [Indexed: 06/16/2024]
Abstract
Kidney transplantation (KT) is the best treatment option for end-stage kidney disease (ESKD). Acute rejection rates have decreased drastically in recent years but chronic kidney allograft disease (CKAD) is still an important cause of allograft failure and return to dialysis. Thus, there is unmet need to identify and reverse the cause of CKAD. Additionally, cardiovascular events after KT are still leading causes of morbidity and mortality. One overlooked potential contributor to CKAD and adverse cardiovascular events is increased sodium/salt intake in kidney transplant recipients (KTRs). In general population, the adverse effects of high sodium intake are well known but in KTRs, there is a paucity of evidence despite decades of experience with KT. Limited research showed that sodium intake is high in most KTRs. Moreover, excess sodium intake is associated with elevated blood pressure and albuminuria in some studies involving KTRs. There is also experimental evidence suggesting that increased sodium intake is associated with histologic graft damage. Critical knowledge gaps still remain, including the exact amount of sodium restriction needed in KTRs to optimize outcomes and allograft survival. Additionally, best methods to measure sodium intake and practices to follow-up are not clarified in KTRs. To meet these deficits, prospective long term studies are warranted in KTRs. Moreover, preventive measures must be determined and implemented both at individual and societal levels to achieve sodium restriction in KTRs.
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Affiliation(s)
- Baris Afsar
- Suleyman Demirel University, School of Medicine, Department of Nephrology, 32260, Cunur, Isparta, Türkiye; Saint Louis University, School of Medicine, Division of Nephrology, St. Louis, MO, USA.
| | - Rengin Elsurer Afsar
- Suleyman Demirel University, School of Medicine, Department of Nephrology, 32260, Cunur, Isparta, Türkiye; Saint Louis University, School of Medicine, Division of Nephrology, St. Louis, MO, USA
| | - Yasar Caliskan
- Saint Louis University, School of Medicine, Division of Nephrology, St. Louis, MO, USA
| | - Krista L Lentine
- Saint Louis University, School of Medicine, Division of Nephrology, St. Louis, MO, USA
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Alwis US, Verbakel I, Pauwaert K, Delanghe J, Dossche L, Van Camp J, Roggeman S, Everaert K. The Influence of Salt Sensitivity Phenotype on Sodium Excretion and Diuresis: A Chrononutrition Pilot Study. Int J Clin Pract 2022; 2022:9608962. [PMID: 35685516 PMCID: PMC9159230 DOI: 10.1155/2022/9608962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 12/06/2021] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND Chrononutrition studies on interaction of diet/nutrients on endogenous circadian clocks and meal timing on metabolic homeostasis may be of importance in the management of nocturnal polyuria (NP), owing to loss of circadian rhythm in nighttime urination. Dietary salt restriction is an increasingly popular lifestyle recommendation for NP patients. AIM This study aims to evaluate the effect of an acute salt load on diuresis and to study the phenomenon of salt sensitivity. Methodology. Young, healthy men (n = 21, fasted and sober) ingested 500 ml of water on the control day and 8 g and 12 g of salt with water (500 ml) on two other days. Blood and urine samples were collected at 0 hrs, 2 hrs, and 4 hrs and voided volumes were recorded. Diuresis, serum and urine osmolality, sodium, potassium, urea, and creatinine were measured. Salt sensitivity was determined based on the rate of sodium excretion. RESULTS Compared to 8 g, ingestion of 12 g of salt significantly increased diuresis after 4 hrs. Pure water load induced fast diuresis, whereas salt and water load initially reduced diuresis and promoted late increase in diuresis. The total voided volume was significantly lower in the salt sensitive individuals. CONCLUSION Taken together, salt sensitivity profile and type and time of fluid intake are important considerations to build effective personalized lifestyle recommendations for NP patients, which needs further investigation.
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Affiliation(s)
| | - Irina Verbakel
- Department of Human Structure and Repair, Ghent University, 9000 Ghent, Belgium
| | - Kim Pauwaert
- Department of Human Structure and Repair, Ghent University, 9000 Ghent, Belgium
| | - Joris Delanghe
- Department of Diagnostic Sciences, Ghent University, 9000 Ghent, Belgium
| | - Lien Dossche
- Department of Internal Medicine and Pediatrics, Ghent University, 9000 Ghent, Belgium
- Department of Pediatric Nephrology, Ghent University, 9000 Ghent, Belgium
| | - John Van Camp
- Department of Food Technology, Safety and Health, Ghent University, 9000 Ghent, Belgium
| | - Saskia Roggeman
- Research and Policy Department, Psychiatric Center Sint-Jan-Baptist, 9060 Zelzate, Belgium
| | - Karel Everaert
- Department of Human Structure and Repair, Ghent University, 9000 Ghent, Belgium
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Okumura K, Obayashi K, Tai Y, Yamagami Y, Negoro H, Kataoka H, Kurumatani N, Saeki K. Association between NT-proBNP and nocturia among community-dwelling elderly males and females: A cross-sectional analysis of the HEIJO-KYO study. Neurourol Urodyn 2020; 40:112-119. [PMID: 33085835 DOI: 10.1002/nau.24550] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 10/06/2020] [Accepted: 10/09/2020] [Indexed: 11/12/2022]
Abstract
AIMS To investigate the association between B-type natriuretic peptide (BNP) and nocturia among community-dwelling males and females. METHODS A total of 1096 participants (mean age 71.9 ± 7.1 years, 518 [47.2%] males) were included in the study. The number of nocturnal voids was recorded in a self-reported urination diary, and nocturia was defined as two or more voids per night. Daytime serum concentration of the N-terminal fragment of BNP precursor (NT-proBNP) was measured. Multivariable logistic regression analysis was performed to determine the association between NT-proBNP and nocturia. RESULTS Nocturia was observed in 23.5% of females and 37.1% of males. Higher NT-proBNP (log pg/ml) was associated with nocturia in both gender groups (females: odds ratio [OR]: 1.67, 95% confidence interval [95% CI], 1.21-2.34, p = .002; males: OR: 1.26, 95% CI, 1.01-1.59, p = .046), independent of confounding variables including night-time blood pressure, mean voided volume, and chronic kidney disease. Although the increase in prevalence of nocturia with higher NT-proBNP was equivalent in both genders, some effect of gender on the relationship between NT-proBNP and nocturia was observed (p = .037). Nocturnal urine volume was also significantly and independently associated with NT-proBNP level (females: β = 32.9 ml, 95% CI, 5.63-60.2, p = .018; males: β = 34.6 ml, 95% CI, 9.40-59.9, p = .007). CONCLUSIONS This study revealed higher serum NT-proBNP is significantly and independently associated with the prevalence of nocturia in both males and females. This is an exploratory cross-sectional study and the analyses are post hoc, so further research works are needed to clarify the causality and clinical value.
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Affiliation(s)
- Kazuki Okumura
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan
| | - Kenji Obayashi
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan
| | - Yoshiaki Tai
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan.,Department of General Medicine, Nara Medical University School of Medicine, Nara, Japan
| | - Yuki Yamagami
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan
| | | | - Hiroshi Kataoka
- Department of Neurology, Nara Medical University School of Medicine, Nara, Japan
| | - Norio Kurumatani
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan
| | - Keigo Saeki
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan
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Alwis US, Delanghe J, Dossche L, Walle JV, Van Camp J, Monaghan TF, Roggeman S, Everaert K. Could Evening Dietary Protein Intake Play a Role in Nocturnal Polyuria? J Clin Med 2020; 9:jcm9082532. [PMID: 32764521 PMCID: PMC7464190 DOI: 10.3390/jcm9082532] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 07/29/2020] [Accepted: 08/03/2020] [Indexed: 02/07/2023] Open
Abstract
Urea is the most abundant and the largest contributing factor for urine osmolality. Urinary urea excretion is highly interrelated with dietary protein intake. Accordingly, an increase of urinary urea excretion due to high protein diet may lead to urea-induced osmotic diuresis. This study aims to explore the association between nocturnal polyuria (NP) and urea. This is a post hoc analysis of a prospective observational study of subjects who completed a renal function profile between October 2011 and February 2015 (n = 170). Each subject underwent a 24 h urine collection, which included 8 urine samples collected at 3 h intervals. Urine volume, osmolality, creatinine, urea and sodium were determined. Urinary urea excretion was used to estimate dietary protein intake. Compared to the control group, subjects with NP exhibited significantly higher nighttime urea and sodium excretion. Estimated evening dietary protein intake was correspondingly significantly higher amongst the NP subgroup. Nighttime diuresis rate was positively associated with age and nighttime free water clearance, creatinine clearance, sodium excretion, and urea excretion in NP subjects. Therefore, increased nocturnal urinary urea excretion may reflect an additional important mediator of nocturia owing to excess nocturnal urine production.
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Affiliation(s)
- Upeksha S. Alwis
- Department of Human Structure and Repair, Ghent University, 9000 Ghent, Belgium;
- Correspondence:
| | - Joris Delanghe
- Department of Diagnostic Sciences, Ghent University, 9000 Ghent, Belgium;
| | - Lien Dossche
- Department of Internal Medicine and Pediatrics, Ghent University, 9000 Ghent, Belgium; (L.D.); (J.V.W.)
- Department of Pediatric Nephrology, Ghent University, 9000 Ghent, Belgium
| | - Johan Vande Walle
- Department of Internal Medicine and Pediatrics, Ghent University, 9000 Ghent, Belgium; (L.D.); (J.V.W.)
- Department of Pediatric Nephrology, Ghent University, 9000 Ghent, Belgium
| | - John Van Camp
- Department of Food Technology, Safety and Health, Ghent University, 9000 Ghent, Belgium;
| | - Thomas F. Monaghan
- Department of Urology, SUNY Downstate Health Sciences University, Brooklyn, NY 11203, USA;
| | - Saskia Roggeman
- Research and Policy Department, Psychiatric Center Sint-Jan-Baptist, 9060 Zelzate, Belgium;
| | - Karel Everaert
- Department of Human Structure and Repair, Ghent University, 9000 Ghent, Belgium;
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Monaghan TF, Epstein MR, Bliwise DL, Michelson KP, Wu ZD, Lazar JM, Everaert K, Kabarriti AE, Holmes A, Wein AJ, Weiss JP. Time of peak nocturnal diuresis rate between men with secondary nocturnal polyuria versus nocturnal polyuria syndrome. Neurourol Urodyn 2020; 39:785-792. [DOI: 10.1002/nau.24283] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 01/09/2020] [Indexed: 11/06/2022]
Affiliation(s)
- Thomas F. Monaghan
- Department of Urology SUNY Downstate Health Sciences University Brooklyn New York
- Department of Urology Veterans Affairs New York Harbor Healthcare System Brooklyn New York
| | - Matthew R. Epstein
- Department of Urology SUNY Downstate Health Sciences University Brooklyn New York
- Department of Urology Veterans Affairs New York Harbor Healthcare System Brooklyn New York
| | - Donald L. Bliwise
- Department of Neurology Emory University School of Medicine Atlanta Georgia
| | - Kyle P. Michelson
- Department of Urology SUNY Downstate Health Sciences University Brooklyn New York
- Department of Urology Veterans Affairs New York Harbor Healthcare System Brooklyn New York
| | - Zhan D. Wu
- Department of Urology SUNY Downstate Health Sciences University Brooklyn New York
- Department of Urology Veterans Affairs New York Harbor Healthcare System Brooklyn New York
| | - Jason M. Lazar
- Division of Cardiovascular Medicine Department of Medicine SUNY Downstate Health Sciences University Brooklyn New York
| | - Karel Everaert
- Department of Urology Ghent University Hospital Ghent Belgium
| | - Abdo E. Kabarriti
- Department of Urology SUNY Downstate Health Sciences University Brooklyn New York
| | - Arturo Holmes
- Department of Urology SUNY Downstate Health Sciences University Brooklyn New York
- Department of Urology Veterans Affairs New York Harbor Healthcare System Brooklyn New York
| | - Alan J. Wein
- Division of Urology Perelman School of Medicine, University of Pennsylvania Health System Philadelphia Pennsylvania
| | - Jeffrey P. Weiss
- Department of Urology SUNY Downstate Health Sciences University Brooklyn New York
- Department of Urology Veterans Affairs New York Harbor Healthcare System Brooklyn New York
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Petersen KS, Rae S, Venos E, Malta D, Trieu K, Santos JA, Thout SR, Webster J, Campbell NRC, Arcand J. Paucity of high-quality studies reporting on salt and health outcomes from the science of salt: A regularly updated systematic review of salt and health outcomes (April 2017 to March 2018). J Clin Hypertens (Greenwich) 2019; 21:307-323. [PMID: 30589204 PMCID: PMC8030311 DOI: 10.1111/jch.13450] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 10/15/2018] [Indexed: 12/14/2022]
Abstract
The purpose of this review is to identify, summarize, and critically appraise studies on dietary salt and health outcomes that were published from April 2017 to March 2018. The search strategy was adapted from a previous systematic review on dietary salt and health. Identified studies were screened based on a priori defined criteria to identify publications eligible for detailed critical appraisals. Overall, 6747 citations were identified by the search strategy, and 42 health outcome studies were identified. Three of the 42 studies met the criteria for methodological quality and health outcomes and underwent detailed critical appraisals and commentary. In addition, a systematic review and meta-analysis was critically appraised, although it did not strictly meet our methodological criteria. All four of the studies critically appraised found that sodium reduction improved blood pressure, especially in individuals with hypertension. In addition, sodium reduction reduced albuminuria in patients with stage 1-3 chronic kidney disease. Examination of the time course of blood pressure responses to sodium reduction revealed lowering sodium in the context of an average American diet may not produce maximal blood pressure reductions within a 4-week intervention period. This review provides further evidence of the benefit of sodium reduction for blood pressure lowering and gives insights into the subgroups of the population that may derive the greatest benefit from sodium reduction and the time course required to see benefit. Only three high-quality studies were identified during this 12-month review period, highlighting the critical need for more well-conducted rigorous studies in this area.
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Affiliation(s)
- Kristina S. Petersen
- Department of Nutritional SciencesPennsylvania State UniversityUniversity ParkPennsylvania
- The George Institute for Global HealthSydneyNew South WalesAustralia
| | - Sarah Rae
- Faculty of Health SciencesThe University of Ontario Institute of TechnologyOshawaOntarioCanada
| | - Erik Venos
- Division of Endocrinology and Metabolism, Department of Medicine, Cumming School of MedicineUniversity of CalgaryCalgaryAlbertaCanada
| | - Daniela Malta
- Department of Nutritional Science, Faculty of MedicineUniversity of TorontoTorontoOntarioCanada
| | - Kathy Trieu
- The George Institute for Global HealthUniversity of New South WalesSydneyNew South WalesAustralia
| | - Joseph Alvin Santos
- The George Institute for Global HealthUniversity of New South WalesSydneyNew South WalesAustralia
| | | | - Jacqui Webster
- The George Institute for Global HealthUniversity of New South WalesSydneyNew South WalesAustralia
| | - Norm R. C. Campbell
- Department of Medicine, Physiology and Pharmacology and Community Health SciencesO'Brien Institute for Public Health and Libin Cardiovascular Institute of Alberta, University of CalgaryCalgaryAlbertaCanada
| | - JoAnne Arcand
- Faculty of Health SciencesThe University of Ontario Institute of TechnologyOshawaOntarioCanada
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Denys MA, Decalf V, Kumps C, Petrovic M, Goessaert AS, Everaert K. Pathophysiology of nocturnal lower urinary tract symptoms in older patients with urinary incontinence. Int J Urol 2017; 24:808-815. [DOI: 10.1111/iju.13431] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 07/09/2017] [Indexed: 11/30/2022]
Affiliation(s)
| | - Veerle Decalf
- Department of Urology; Ghent University Hospital; Ghent Belgium
| | - Candy Kumps
- Department of Urology; Ghent University Hospital; Ghent Belgium
| | - Mirko Petrovic
- Department of Geriatrics; Ghent University Hospital; Ghent Belgium
| | | | - Karel Everaert
- Department of Urology; Ghent University Hospital; Ghent Belgium
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Denys MA, Goessaert AS, Dejaeghere B, Decalf V, Hoebeke P, Everaert K. A different way to study frequency volume charts in patients with nocturia. Neurourol Urodyn 2017; 37:768-774. [DOI: 10.1002/nau.23344] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 05/29/2017] [Indexed: 11/06/2022]
Affiliation(s)
| | | | - Brecht Dejaeghere
- Faculty of Medicine and Health Sciences; Ghent University; Ghent Belgium
| | - Veerle Decalf
- Department of Urology; Ghent University Hospital; Ghent Belgium
| | - Piet Hoebeke
- Department of Urology; Ghent University Hospital; Ghent Belgium
| | - Karel Everaert
- Department of Urology; Ghent University Hospital; Ghent Belgium
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