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Karamaria S, Dhondt K, Everaert K, Mauel R, Nørgaard JP, Raes A, Van Herzeele C, Verbakel I, Walle JV. First uninterrupted sleep period in children and adolescents with nocturnal enuresis: Added value in diagnosis and follow-up during therapy. Neurourol Urodyn 2024; 43:1147-1154. [PMID: 37929315 DOI: 10.1002/nau.25322] [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: 10/19/2023] [Accepted: 10/22/2023] [Indexed: 11/07/2023]
Abstract
BACKGROUND The first uninterrupted sleep period (FUSP, time up to the first episode of enuresis/nocturia after falling asleep) is a frequently investigated parameter in adults with nocturia, as it correlates with quality of life. However, it has not been included in pediatric enuresis studies. AIM Investigate FUSP, circadian renal water and sodium handling, as well as sleep quality before and after desmopressin therapy in enuresis. MATERIALS AND METHODS We conducted a post hoc analysis of a prospective study in 30 treatment-naïve children with enuresis who underwent a video-polysomnography and a 24-h urine concentration profile before and after 6 months of desmopressin therapy. We analyzed FUSP, periodic limb movements in sleep (PLMS), and arousal indexes and their correlations with the urinary parameters. RESULTS Sixteen children with a mean age of 10.9 ± 3.1 years had full registrations and were included in this subanalysis. After therapy, FUSP was significantly longer (p < 0.001), and the PLMS index was lower (p = 0.023). Significant differences in the circadian rhythm of diuresis (night/day diuresis, p = 0.041), nocturnal urinary osmolality (p = 0.009), and creatinine (p = 0.001) were found, demonstrating the increase of urinary concentration overnight by desmopressin, as well as a significant antidiuretic effect (diuresis [p = 0.013] and diuresis rate (p = 0.008). There was no correlation between the difference of FUSP, PLMS index, and urinary parameters. Nevertheless, despite this study being underpowered, there are indications of a correlation between nocturnal diuresis and diuresis rate. RESULTS Our results support the need for further research regarding FUSP in children with enuresis, in accordance with nocturia studies in adults, as this parameter could be valuable in the follow-up and evaluation of therapeutic strategies for enuresis.
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Affiliation(s)
- Sevasti Karamaria
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
| | - Karlien Dhondt
- Department of Child and Adolescent Psychiatry, Pediatric Sleep Center, Ghent University Hospital, Ghent, Belgium
| | - Karel Everaert
- Department of Urology, Ghent University Hospital, Ghent, Belgium
| | - Reiner Mauel
- Department of Pediatric Intensive Care, Brussels University Hospital, Brussels, Belgium
| | | | - Ann Raes
- Department of Pediatric Nephrology, Ghent University Hospital, Ghent, Belgium
| | | | - Irina Verbakel
- Department of Urology, Ghent University Hospital, Ghent, Belgium
| | - Johan Vande Walle
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
- Department of Pediatric Nephrology, Ghent University Hospital, Ghent, Belgium
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Karamaria S, Dossche L, Delens V, Degraeuwe E, Raes A, Mauel R, Vande Walle C, Everaert K, Vande Walle J. Circadian rhythm of water and solute excretion in nocturnal enuresis. Pediatr Nephrol 2023; 38:771-779. [PMID: 35748940 DOI: 10.1007/s00467-022-05645-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 05/11/2022] [Accepted: 05/27/2022] [Indexed: 01/19/2023]
Abstract
BACKGROUND Nocturnal polyuria (NP) due to a suppressed vasopressin circadian rhythm is a well-documented pathogenetic mechanism in enuresis, mainly studied in monosymptomatic enuresis. A substantial percentage of patients do not respond to desmopressin. This suggests that NP may not only be related to vasopressin, but that other kidney components play a role. Solute handling and osmotic excretion have been investigated in the past, especially in refractory patients. Nevertheless, data in treatment-naïve populations with information on timing overnight are sparse. This study aims to investigate the diuresis and solute excretion in treatment-naïve patients with or without NP, with emphasis on circadian rhythms. METHODS Retrospective analysis of 403 treatment-naïve children 5-18 years with severe enuresis (> 8 nights/2 weeks). Circadian rhythms were evaluated by a 24-h urine collection in 8 timed portions (4 day, 4 nighttime) at in-home settings. Urine volume, osmolality, and creatinine were measured. Patients were subdivided into three groups according to nocturnal diuresis (ND) and Expected Bladder Capacity (EBCage) ratio: (a) < 100%, (b) 100-129%, (c) > 130%. RESULTS All groups maintained circadian rhythm for diuresis and diuresis rates. Patients with higher ND (100-129% and > 130% EBCage) had higher daytime volumes and less pronounced circadian rhythm. In the ND group > 130% EBCage, the ND rate was higher during the first night collection and osmotic excretion was significantly higher overnight. CONCLUSIONS Overall 24-h fluid intake (reflected by 24-h diuresis) and nutritional intake (24-h osmotic excretion) might play a role in enuresis. Increased diuresis rate early in the night can be important in some patients, whereas the total night volume can be important in others. A higher resolution version of the Graphical abstract is available as Supplementary Information.
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Affiliation(s)
- Sevasti Karamaria
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
- Department of Pediatric Nephrology, Ghent University Hospital, Ghent, Belgium
| | - Lien Dossche
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
- Department of Pediatric Nephrology, Ghent University Hospital, Ghent, Belgium
| | - Vincent Delens
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
| | - Eva Degraeuwe
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
| | - Ann Raes
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
- Department of Pediatric Nephrology, Ghent University Hospital, Ghent, Belgium
| | - Reiner Mauel
- Department of Pediatric Intensive Care, Brussels University Hospital, Brussels, Belgium
| | | | - Karel Everaert
- Department of Urology, Ghent University Hospital, Ghent, Belgium
| | - Johan Vande Walle
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium.
- Department of Pediatric Nephrology, Ghent University Hospital, Ghent, Belgium.
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Aucar N, Fagalde I, Zanella A, Capalbo O, Aroca-Martinez G, Favre G, Musso CG. Nocturia: its characteristics, diagnostic algorithm and treatment. Int Urol Nephrol 2023; 55:107-114. [PMID: 35945304 DOI: 10.1007/s11255-022-03317-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Accepted: 07/25/2022] [Indexed: 01/05/2023]
Abstract
Nocturia is the complaint that an individual has to wake up at night one or more times to urinate. It is a frequent condition among older adults and entails detrimental effects with regard to sleeping, sexual activity, comfort, depression, mental function and vitality. It is clinically important to distinguish it from global polyuria, defined as a urinary rate ≥ 125 ml/h (3000 ml/day), as well as from nocturnal polyuria, which is an abnormally large volume of urine during sleep associated with a decreased daytime urine production. A Frequency Volume Chart (FVC), overnight water deprivation test with renal concentrating capacity test, and the nocturnal bladder capacity index are some of the methods that help establish the underlying pathology of this condition and hence define an adequate treatment plan.
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Affiliation(s)
- Nahir Aucar
- Physiology Department, Instituto Universitario del Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Ines Fagalde
- Physiology Department, Instituto Universitario del Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Akemi Zanella
- Physiology Department, Instituto Universitario del Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Olivia Capalbo
- Physiology Department, Instituto Universitario del Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Gustavo Aroca-Martinez
- Universidad del Norte, Barranquilla, Colombia.,Facultad de Ciencias de la Salud, Universidad Simón Bolivar, Barranquilla, Colombia
| | - Gabriel Favre
- Urology Division, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Carlos G Musso
- Physiology Department, Instituto Universitario del Hospital Italiano de Buenos Aires, Buenos Aires, Argentina. .,Facultad de Ciencias de la Salud, Universidad Simón Bolivar, Barranquilla, Colombia.
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Dietary salt with nitric oxide deficiency induces nocturnal polyuria in mice via hyperactivation of intrarenal angiotensin II-SPAK-NCC pathway. Commun Biol 2022; 5:175. [PMID: 35228649 PMCID: PMC8885931 DOI: 10.1038/s42003-022-03104-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 02/01/2022] [Indexed: 11/12/2022] Open
Abstract
Nocturnal polyuria is the most frequent cause of nocturia, a common disease associated with a compromised quality of life and increased mortality. Its pathogenesis is complex, and the detailed underlying mechanism remains unknown. Herein, we report that concomitant intake of a high-salt diet and reduced nitric oxide (NO) production achieved through Nω-Nitro-L-arginine methyl ester hydrochloride (L-NAME) administration in mice resulted in nocturnal polyuria recapitulating the clinical features in humans. High salt intake under reduced NO production overactivated the angiotensin II-SPAK (STE20/SPS1-related proline–alanine-rich protein kinase)-NCC (sodium chloride co-transporter) pathway in the kidney, resulting in the insufficient excretion of sodium during the day and its excessive excretion at night. Excessive Na excretion at night in turn leads to nocturnal polyuria due to osmotic diuresis. Our study identified a central role for the intrarenal angiotensin II-SPAK-NCC pathway in the pathophysiology of nocturnal polyuria, highlighting its potential as a promising therapeutic target. This study reports a mouse model of nocturnal polyuria - increased urine production at night that causes compromised quality of life and may impact mortality in older people. The authors identify a molecular pathway in the kidney that could prove to be a promising drug target for nocturnal polyuria.
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Olesen T, Paul J, Gramme P, Drake MJ, Vandewalle J, Everaert K. Assessment of the Most Impactful Combination of Factors Associated with Nocturia and to Define Nocturnal Polyuria by Multivariate Modelling. J Clin Med 2020; 9:jcm9072262. [PMID: 32708764 PMCID: PMC7408683 DOI: 10.3390/jcm9072262] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 07/04/2020] [Accepted: 07/06/2020] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Nocturia is common and associated with multiple disease states. Many potential mechanisms have been proposed for nocturia, which also remains challenging to manage. PURPOSE To use multivariate analysis to determine which combinations of factors can accurately discriminate clinically significant nocturia in patients to facilitate clinical management and treatment decisions. PATIENTS AND METHODS Data analysis was based on frequency volume charts from three randomized controlled trials. There were 1479 patients included, of which 215 patients had no/mild nocturia and 1264 had clinically significant nocturia with at least two voids per night. Factors studied that may influence nocturia were demographics, sleep duration, functional bladder capacity, 24 h urine volume and literature-suggested definitions of nocturnal polyuria. We used univariate analysis and cross-validated multivariate modelling to assess association between factors and nocturia status, redundancy between factors and whether the combined use of factors could explain patients' nocturia status. RESULTS The multivariate analyses showed that the most useful definitions of nocturia are 'Nocturia Index' (NI) and 'Nocturnal Urine Production per hour' (NUPh) in combination with functional bladder capacity and sleep duration. Published definitions providing binary nocturnal polyuria outcomes had lower performance than continuous indices. These analyses also showed that NI was not specific to nocturnal polyuria as it also captured nocturia due to low functional bladder capacity. By contrast, NUPh was demonstrated to be specific to nocturnal polyuria. CONCLUSION NUPh has previously been shown among elderly males to be essential in nocturia and a very valid measure of nocturnal polyuria. However, the current, large and independent dataset now confirms that it can be applied in an adult population with a complaint of nocturia covering both males and females.
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Affiliation(s)
- Tine Olesen
- Urology Department, Ghent University Hospital, 9000 Ghent, Belgium;
- Correspondence: ; Fax: +49-15155385918
| | - Jerome Paul
- DNAlytics, 1348 Louvain-la-Neuve, Belgium; (J.P.); (P.G.)
| | - Pierre Gramme
- DNAlytics, 1348 Louvain-la-Neuve, Belgium; (J.P.); (P.G.)
| | - Marcus J. Drake
- Bristol Urological Institute, University of Bristol, Bristol BS105NB, UK;
| | - Johan Vandewalle
- Department of Pediatric Nephrology, Safepedrug, University Hospital Ghent, 9000 Ghent, Belgium;
| | - Karel Everaert
- Urology Department, Ghent University Hospital, 9000 Ghent, Belgium;
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Everaert K, Hervé F, Bower W, Djurhuus JC, Dmochowski R, Fine N, Wein A, Wyndaele M, Weiss J. How can we develop a more clinically useful and robust algorithm for diagnosing and treating nocturia? ICI-RS 2017. Neurourol Urodyn 2019; 37:S46-S59. [PMID: 30133785 DOI: 10.1002/nau.23569] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Accepted: 02/26/2018] [Indexed: 12/15/2022]
Abstract
AIMS Nocturia, or waking up at night to void, is a highly prevalent and bothersome symptom. Currently, there is a lack of clear and consistent recommendations regarding evaluation and management of nocturia. The aim of this report is to discuss how to fill the gaps in our knowledge in order to develop a practical patient-oriented diagnostic and therapeutic algorithm for nocturia. METHODS This paper is a report of the presentations and subsequent discussion of a Think Tank session at the annual International Consultation on Incontinence Research Society (ICI-RS) in June 2017 in Bristol. RESULTS AND CONCLUSION Further investigations are needed to better understand the pathophysiology of nocturia, to allow improvement in diagnosis, and to optimize treatment by increasing efficacy and reducing adverse events. Patient-oriented practical guidelines on nocturia are needed to help clinicians from different disciplines diagnose and treat nocturia.
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Affiliation(s)
- Karel Everaert
- Department of Urology, Ghent University Hospital, Ghent, Belgium
| | - François Hervé
- Department of Urology, Ghent University Hospital, Ghent, Belgium
| | - Wendy Bower
- Faculty of Medicine, Department of Medicine and Community Care, Melbourne Health, Dentistry and Health Science, University of Melbourne, Melbourne, Australia
| | - Jens C Djurhuus
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Roger Dmochowski
- Department of Urology, Vanderbilt University, Nashville, Tennesse
| | - Noam Fine
- Department of Urology, SUNY Downstate College of Medicine, Brooklyn, New York
| | - Alan Wein
- Department of Urology, Perelman School of Medicine-University of Pennsylvania, Philadelphia, Pennsylvania
| | - Michel Wyndaele
- Bristol Urological Institute, Southmead Hospital, Bristol, United Kingdom
| | - Jeffrey Weiss
- Department of Urology, SUNY Downstate College of Medicine, Brooklyn, New York
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Kass-Iliyya A, Hashim H. Nocturnal polyuria: Literature review of definition, pathophysiology, investigations and treatment. JOURNAL OF CLINICAL UROLOGY 2019. [DOI: 10.1177/2051415818756792] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Nocturnal polyuria (NP) is characterised by increased urine production overnight in comparison to daytime. It has significant adverse events in adults including reduced quality of life, increased risk of falls and increased mortality.Although NP can be a manifestation of other significant conditions like heart failure and sleep apnoea, there are lots of unanswered questions about NP. What is the underlying pathophysiology? Is NP a physiological manifestation of ageing? Is the circadian change of vasopressin release the primary pathology? Or is it a secondary phenomenon to a low diurnal production of urine? Is the primary pathology at the kidney level or is there another humoral, cardiac, or endovascular element? In this article, we summarise the available English-language literature on the subject of NP, including its epidemiology, pathogenesis, diagnosis and treatment.Level of evidence: Not applicable for this multicentre audit.
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Affiliation(s)
- Antoine Kass-Iliyya
- Urology Department, Bristol Urological Institute, Southmead Hospital, Bristol, BS10 5NB, UK
| | - Hashim Hashim
- Urology Department, Bristol Urological Institute, Southmead Hospital, Bristol, BS10 5NB, UK
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Er Shen Wan extract alleviates polyuria and regulates AQP 2 and AVPR 2 in a rat model of spleen-kidney Yang deficiency-induced diarrhea. Biomed Pharmacother 2018; 110:302-311. [PMID: 30522016 DOI: 10.1016/j.biopha.2018.11.147] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 11/27/2018] [Accepted: 11/28/2018] [Indexed: 02/08/2023] Open
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Er Shen Wan (ESW), has been empirically used for treating spleen-kidney Yang deficiency (SKYD) syndrome in Traditional Chinese medicine (TCM) for centuries and shows a variety of activities. The medicinal formula is a mixture of two component herbs, Psoraleae Fructus (PF, Bu-Gu-Zhi in Chinese) and Myristicae Semen (MS, Rou-Dou-Kou in Chinese). The current study was designed to evaluate ESWP antidiuretic treatment of polyuria and to explore potential mechanisms of renal water metabolism in the rat model of SKYD-induced diarrhea. MATERIALS AND METHODS An animal model of 'SKYD-induced diarrhea syndrome' has been established to evaluate the therapeutic effect and action mechanism according to the clinical syndrome and symptoms. The optimal dose (3.5 g/kg) of ESWP was given to rats by gavage for two weeks. Urinary volumes after 24 h were recorded. After the end of the trial, macroscopic morphological and histological examination of the kidney were conducted. Serum levels of Arginine vasopressin (AVP) and aldosterone (ALD) were also measured. Additionally, quantitative real-time RT-PCR (RT-qPCR) and immunohistochemistry (IHC) analyses were performed to clarify the regulation of aquaporin 2 (AQP 2) and arginine vasopressin type 2 receptor (AVPR 2) in the kidney at the gene and tissue expression levels respectively. RESULTS After the administration of ESWP, urinary output volume after 24 h was found to be significantly decreased in rats. Elevated plasma levels of AVP and ALD were detected. Histological kidney damage appeared to be impeded, and histological disease scores were reduced. In addition, the expression levels of AQP 2 and AVPR 2 were significantly increased. CONCLUSION This study suggests that ESWP may elicit significant effects on the treatment of polyuria. Potential mechanisms at least partially involve hormone regulation, and alleviating renal pathological damage. Simultaneously, ESWP may alter renal water absorption by increasing AQP 2 and AVPR 2 expression levels. Thus, the in vivo experimental evidence indicates that ESWP has a therapeutic effect on the SKYD syndrome, which is consistent with its traditional usage.
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Olesen TK, Denys MA, Vande Walle J, Everaert K. Systematic review of proposed definitions of nocturnal polyuria and population-based evidence of their diagnostic accuracy. Acta Clin Belg 2018; 73:268-274. [PMID: 29405090 DOI: 10.1080/17843286.2018.1427821] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Background Evidence of diagnostic accuracy for proposed definitions of nocturnal polyuria is currently unclear. Purpose Systematic review to determine population-based evidence of the diagnostic accuracy of proposed definitions of nocturnal polyuria based on data from frequency-volume charts. Methods Seventeen pre-specified search terms identified 351 unique investigations published from 1990 to 2016 in BIOSIS, Embase, Embase Alerts, International Pharmaceutical Abstract, Medline, and Cochrane. Thirteen original communications were included in this review based on pre-specified exclusion criteria. Data were extracted from each paper regarding subject age, sex, ethnicity, health status, sample size, data collection methods, and diagnostic discrimination of proposed definitions including sensitivity, specificity, positive and negative predictive value. Results The sample size of study cohorts, participant age, sex, ethnicity, and health status varied considerably in 13 studies reporting on the diagnostic performance of seven different definitions of nocturnal polyuria using frequency-volume chart data from 4968 participants. Most study cohorts were small, mono-ethnic, including only Caucasian males aged 50 or higher with primary or secondary polyuria that were compared to a control group of healthy men without nocturia in prospective or retrospective settings. Proposed definitions had poor discriminatory accuracy in evaluations based on data from subjects independent from the original study cohorts with findings being similar regarding the most widely evaluated definition endorsed by ICS. Conclusions Diagnostic performance characteristics for proposed definitions of nocturnal polyuria show poor to modest discrimination and are not based on sufficient level of evidence from representative, multi-ethnic population-based data from both females and males of all adult ages.
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Affiliation(s)
- Tine Kold Olesen
- Ferring Pharmaceuticals A/S, Copenhagen, Denmark
- Department of Uro-gynaecology, Ghent University, Ghent, Belgium
| | | | - Johan Vande Walle
- Department of Pediatrics and medical genetics, Ghent University, Ghent, Belgium
| | - Karel Everaert
- Department of Uro-gynaecology, Ghent University, Ghent, Belgium
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Bruneel E, Goessaert AS, Denys MA, Juul KV, Nørgaard JP, Everaert K. An exploratory pilot study with copeptin as a biomarker for individualizing treatment for nocturnal polyuria. Low Urin Tract Symptoms 2017; 11:43-47. [PMID: 29057582 DOI: 10.1111/luts.12192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 05/31/2017] [Accepted: 06/25/2017] [Indexed: 11/30/2022]
Abstract
OBJECTIVE The aim of the present study was to investigate the use of random copeptin concentrations as possible biomarkers for the differential diagnosis of nocturnal polyuria (NP). METHODS In all, 111 patients with and without nocturia were enrolled in the study. Patients with a neurogenic bladder and/or those who had undergone bladder or urethral surgery were excluded from the study. All patients completed a 72-hour frequency-volume chart and a renal function profile. A random blood sample was obtained during the day for measurement of plasma copeptin concentrations, osmolality, and serum sodium and creatinine concentrations. The effect of the use of different definitions for NP was evaluated. RESULTS The median age of the study participants was 61 years, and 48% were female. Copeptin was significantly correlated with urinary and plasma osmolality, as well as free water clearance (r=0.43, 0.56 and -0.38 respectively; P < .001 for all). Study participants were divided into 3 groups: controls (n = 51), those with NP (n = 41), and those with global polyuria (n = 19). Copeptin concentrations were significantly lower in subjects with global polyuria than in those with NP and the control group (2.96 vs 3.97 and 3.94 pM, respectively; P = .008 and .005). There was no significant difference in random daytime copeptin concentrations between the NP and control groups (P = .972). The results differed when other definitions for NP were used (e.g. NPi33 or NUP10). CONCLUSIONS We could not confirm our hypothesis that patients with NP have lower copeptin concentrations, although random blood sampling is not ideal. Further research is required to determine the use of copeptin in NP, perhaps in the identification of the desmopressin response.
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Affiliation(s)
- Elke Bruneel
- Department of Urology, Ghent University Hospital, De Pintelaan 185, 9000 Ghent, Belgium
| | - An-Sofie Goessaert
- Department of Urology, Ghent University Hospital, De Pintelaan 185, 9000 Ghent, Belgium
| | - Marie-Astrid Denys
- Department of Urology, Ghent University Hospital, De Pintelaan 185, 9000 Ghent, Belgium
| | - Kristian V Juul
- Ferring Pharmaceuticals AS, 11 Kay Fiskers Plads, DK-2300 Copenhagen S, Denmark
| | - Jens P Nørgaard
- Ferring Pharmaceuticals AS, 11 Kay Fiskers Plads, DK-2300 Copenhagen S, Denmark
| | - Karel Everaert
- Department of Urology, Ghent University Hospital, De Pintelaan 185, 9000 Ghent, Belgium
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Denys MA, Kapila V, Weiss J, Goessaert AS, Everaert K. Basic or extended urine sampling to analyse urine production? Neurourol Urodyn 2017; 36:1867-1875. [PMID: 28054405 DOI: 10.1002/nau.23198] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 11/26/2016] [Indexed: 11/12/2022]
Abstract
BACKGROUND Frequency volume charts are valuable tools to objectify urine production in patients with nocturia, enuresis or nocturnal incontinence. Analyses of daytime and nighttime urine (=basic collection) or analyses of urine samples collected every 3 h (=extended collection) extend this evaluation by describing circadian patterns of water and solute diuresis (=renal function profiles). AIM To assess intra-individual correlation and agreement between renal function profiles provided using basic and extended urine collections, and using two extended urine collections. To create a short-form of the extended collection. METHODS This prospective observational study was executed at Ghent University Hospital, Belgium. Study participation was open for anyone visiting the hospital. Participants collected one basic and two extended 24-h urine collections. Urinary levels of osmolality, sodium and creatinine were determined. RESULTS There was a moderate to strong correlation between results of basic and extended urinalyses. Comparing both extended urinalyses showed a moderate correlation between the eight individual samples and a weak to strong correlation between the mean daytime and nighttime values of renal functions. Different samples could be considered as most representative for mean daytime values, while all samples collected between 03 and 05am showed the highest agreement with mean nighttime values of renal function. CONCLUSION Since there is a good correlation and agreement between basic and extended urine collections to study the mechanisms underlying urine production, the choice of urine sampling method to evaluate urine production depends on the purpose. A nighttime-only urine sample collected between 03 and 05am may be the most practical approach.
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Affiliation(s)
| | - Vansh Kapila
- Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Jeffrey Weiss
- Department of Urology, SUNY Downstate Medical Center, New York City, New York
| | | | - Karel Everaert
- Department of Urology, Ghent University Hospital, Ghent, Belgium
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Denys MA, Cherian J, Rahnama'i MS, O'Connell KA, Singer J, Wein AJ, Dhondt K, Everaert K, Weiss JP. ICI-RS 2015-Is a better understanding of sleep the key in managing nocturia? Neurourol Urodyn 2016; 37:2048-2052. [DOI: 10.1002/nau.23032] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Accepted: 04/18/2016] [Indexed: 11/05/2022]
Affiliation(s)
| | - Jerald Cherian
- Department of Urology; SUNY Downstate College of Medicine; New York
| | - Mohammad S. Rahnama'i
- Department of Urology; Maastricht University Medical Centre, Maastricht; The Netherlands
| | - Kathleen A. O'Connell
- Department of Health and Behavior Studies; Teachers College; Columbia University; New York
| | - Jonathan Singer
- Department of Health and Behavior Studies; Teachers College; Columbia University; New York
| | - Alan J. Wein
- Department of Urology; Perelman School of Medicine-University of Pennsylvania; Philadelphia
| | - Karlien Dhondt
- Department of Child Neurology and Metabolism; Pediatric Sleep Center; Ghent University Hospital; Ghent Belgium
| | - Karel Everaert
- Department of Urology; Ghent University Hospital; Ghent Belgium
| | - Jeffrey P. Weiss
- Department of Urology; SUNY Downstate College of Medicine; New York
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The pathophysiology of monosymptomatic nocturnal enuresis with special emphasis on the circadian rhythm of renal physiology. Eur J Pediatr 2016; 175:747-54. [PMID: 27138767 DOI: 10.1007/s00431-016-2729-3] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 04/15/2016] [Accepted: 04/25/2016] [Indexed: 01/05/2023]
Abstract
UNLABELLED Nocturnal polyuria in monosymptomatic nocturnal enuresis (MNE) has so far mainly been attributed to a disturbed circadian rhythm of renal water handling. Low vasopressin levels overnight correlate with absent maximal concentrating activity, resulting in an increased nocturnal diuresis with low urinary osmolality. Therefore, treatment with desmopressin is a rational choice. Unfortunately, 20 to 60 % of children with monosymptomatic enuresis are desmopressin-resistant. There is increasing evidence that other disturbed circadian rhythms might play a role in nocturnal polyuria. This review focuses on renal aspects in the pathophysiology of nocturnal polyuria in MNE, with special emphasis on circadian rhythms. Articles related to renal circadian rhythms and enuresis were searched through the PubMed library with the goal of providing a concise review. CONCLUSION Nocturnal polyuria can only partially be explained by blunted circadian rhythm of vasopressin secretion. Other alterations in the intrinsic renal circadian clock system also seem to be involved, especially in desmopressin-resistant enuresis. WHAT IS KNOWN • Disturbance in the circadian rhythm of arginine vasopressin secretion is related to nocturnal polyuria in children with enuresis. • Desmopressin is recommended as a treatment for monosymptomatic nocturnal enuresis, working as a vasopressin analogue acting on V2 receptors in the collecting ducts of the kidney. What is New: • Other renal circadian rhythms might play a role in nocturnal polyuria, especially in desmopressin-resistant case.
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