1
|
Gobburu J, Ivaturi V, Wang X, Shoaf SE, Jadhav P, Perrone RD. Comparing Effects of Tolvaptan and Instruction to Increase Water Consumption in ADPKD: Post Hoc Analysis of TEMPO 3:4. KIDNEY360 2023; 4:1702-1707. [PMID: 37986188 PMCID: PMC10758521 DOI: 10.34067/kid.0000000000000302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 10/26/2023] [Indexed: 11/22/2023]
Abstract
Key Points In a post hoc analysis, short-term reduction in spot urine osmolality (Uosm) was associated with decreased kidney volume growth in autosomal dominant polycystic kidney disease for both tolvaptan and instruction to increase hydration alone. For the same spot Uosm reduction, however, the kidney volume benefit was greater with tolvaptan, possibly because of greater cumulative 24-hour Uosm suppression by tolvaptan. Background In addition to decreasing water excretion and increasing urinary concentration, the antidiuretic hormone vasopressin plays a role in the pathophysiology of autosomal dominant polycystic kidney disease. It has been hypothesized that by suppressing vasopressin release, drinking large amounts of water might exert therapeutic effects in autosomal dominant polycystic kidney disease similar to those of tolvaptan, an antagonist of the vasopressin type 2 receptor, but evidence is lacking. We analyzed data from tolvaptan clinical trials to evaluate relationships among water intake, urine osmolality (Uosm), and change in total kidney volume (TKV). Methods Analysis of the Tolvaptan Efficacy and Safety in Management of Autosomal Dominant Polycystic Kidney Disease and Its Outcomes 3:4 clinical trial in which participants were randomized to tolvaptan or placebo and instructed to drink large amounts of water. The relationship between change in spot Uosm from baseline to week 3 and change in TKV to month 12 was assessed using linear regression modeling. Two short-term tolvaptan trials were analyzed to explore relationships between intermittent Uosm sampling and 24-hour Uosm suppression. Results With both tolvaptan and placebo (i.e. , mandated high water intake alone), Uosm reduction at week 3 was associated with reduction in TKV growth at month 12. However, for the same decrease in spot Uosm, the corresponding reduction in TKV growth was greater for tolvaptan (e.g. , a −250 mOsm/kg reduction in Uosm at week 3 was associated with a −1% change in TKV at month 12 for tolvaptan versus +4.5% for placebo). In short-term trials, similar reductions in spot or trough Uosm values were achievable with tolvaptan and high water intake, but cumulative 24-hour suppression was greater with tolvaptan. Conclusions This analysis supports a relationship between effects on Uosm and inhibition of disease progression by tolvaptan and high water intake alone. The findings further suggest that 24-hour Uosm measurement is superior to spot Uosm for assessing suppression of vasopressin activity by tolvaptan.
Collapse
Affiliation(s)
| | | | - Xiaofeng Wang
- Otsuka Pharmaceutical Development & Commercialization (OPDC), Inc., Princeton, New Jersey
| | - Susan E. Shoaf
- Otsuka Pharmaceutical Development & Commercialization (OPDC), Inc., Princeton, New Jersey
| | | | | |
Collapse
|
2
|
Quiroga B, Torra R. Dietary Aspects and Drug-Related Side Effects in Autosomal Dominant Polycystic Kidney Disease Progression. Nutrients 2022; 14:4651. [PMID: 36364911 PMCID: PMC9658114 DOI: 10.3390/nu14214651] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 11/02/2022] [Accepted: 11/02/2022] [Indexed: 08/30/2023] Open
Abstract
Autosomal dominant polycystic kidney disease (ADPKD) is the most commonly inherited kidney disease. In the absence of targeted therapies, it invariably progresses to advanced chronic kidney disease. To date, the only approved treatment is tolvaptan, a vasopressin V2 receptor antagonist that has been demonstrated to reduce cyst growth and attenuate the decline in kidney function. However, it has various side effects, the most frequent of which is aquaresis, leading to a significant discontinuation rate. The strategies proposed to combat aquaresis include the use of thiazides or metformin and a reduction in the dietary osmotic load. Beyond the prescription of tolvaptan, which is limited to those with a rapid and progressive decline in kidney function, dietary interventions have been suggested to protect against disease progression. Moderate sodium restriction, moderate protein intake (up to 0.8 g/kg/day), avoidance of being overweight, and increased water consumption are recommended in ADPKD guidelines, though all with low-grade evidence. The aim of the present review is to critically summarize the evidence on the effect of dietary modification on ADPKD and to offer some strategies to mitigate the adverse aquaretic effects of tolvaptan.
Collapse
Affiliation(s)
- Borja Quiroga
- Nephrology Department, Hospital Universitario de la Princesa, 28006 Madrid, Spain
| | - Roser Torra
- Inherited Kidney Disorders, Department of Nephrology, Fundació Puigvert, Institut d’Investigació Biomèdica Sant Pau (IIB-SANT PAU), Universitat Autònoma de Barcelona, 08193 Barcelona, Spain
| |
Collapse
|
3
|
El-Damanawi R, Lee M, Harris T, Cowley LB, Scholtes I, Bond S, Sandford RN, Wilkinson IB, Casteleijn NF, Hogan MC, Karet Frankl FE, Hiemstra TF. Developing a patient-centred tool for pain measurement and evaluation in autosomal dominant polycystic kidney disease. Clin Kidney J 2021; 14:2338-2348. [PMID: 34754429 PMCID: PMC8573025 DOI: 10.1093/ckj/sfaa259] [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: 09/21/2020] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Pain affects 60% of the autosomal dominant polycystic kidney disease (ADPKD) population. Despite being an early and debilitating symptom, it is poorly characterized and management is suboptimal. This study aimed to develop an ADPKD-specific pain assessment tool (APAT) to facilitate pain research. METHODS Following a systematic review of PATs used in ADPKD studies and against international recommendations for pain trials, our multi-disciplinary team of clinical experts and patients constructed an ADPKD-pain conceptual framework of key pain evaluation themes. We compiled a new APAT covering domains prioritized within our framework using components of questionnaires validated in other chronic pain disorders. The APAT was administered longitudinally within a randomized high-water intake trial (NCT02933268) to ascertain feasibility and provide pilot data on ADPKD pain. RESULTS Thirty-nine ADPKD participants with chronic kidney disease Stages 1-4 provided 129 APAT responses. Each participant completed a median of 3 (range 1-10) assessments. Respondents' mean ± standard deviation age was 47 ± 13 years; 59% (23) were female; and 69% (27) had enlarged kidneys with median time from diagnosis 14.2 (interquartile range 7.0-25.9) years. Pain (52%) and associated analgesic use (29%) were common. Pain severity was associated with increasing age [odds ratio (OR) = 1.07, P = 0.009], female gender (OR = 4.34, P = 0.018), estimated glomerular filtration rate <60 mL/min/1.73 m2 (OR = 5.45, P = 0.021) and hypertension (OR = 12.11, P = 0.007), but not with kidney size (P = 0.23). The APAT achieved good internal consistency (Cronbach's alpha coefficient = 0.91) and test-retest reliability (domain intra-class correlation coefficients ranging from 0.62 to 0.90). CONCLUSIONS The APAT demonstrated good acceptability and reliability, and following further validation in a larger cohort could represent an invaluable tool for future ADPKD pain studies.
Collapse
Affiliation(s)
- Ragada El-Damanawi
- Department of Medicine, Division of Experimental Medicine and Immunotherapeutics, University of Cambridge, Cambridge, UK
- Cambridge Clinical Trials Unit, Cambridge, UK
| | - Michael Lee
- Department of Medicine, Division of Anaesthesia, University of Cambridge, Cambridge, UK
| | | | - Laura B Cowley
- Cambridge Clinical Trials Unit, Cambridge, UK
- Patient Led Research Hub, Cambridge Clinical Trials Unit, Cambridge, UK
| | - Ingrid Scholtes
- Department of Medicine, Division of Anaesthesia, University of Cambridge, Cambridge, UK
| | - Simon Bond
- Cambridge Clinical Trials Unit, Cambridge, UK
| | | | - Ian B Wilkinson
- Department of Medicine, Division of Experimental Medicine and Immunotherapeutics, University of Cambridge, Cambridge, UK
- Cambridge Clinical Trials Unit, Cambridge, UK
| | - Niek F Casteleijn
- Department of Nephrology, University of Groningen, Groningen, The Netherlands
- Department of Urology, University of Groningen, Groningen, The Netherlands
| | - Marie C Hogan
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, NY, USA
| | | | - Thomas F Hiemstra
- Department of Medicine, Division of Experimental Medicine and Immunotherapeutics, University of Cambridge, Cambridge, UK
- Cambridge Clinical Trials Unit, Cambridge, UK
| |
Collapse
|
4
|
Vasileva VY, Sultanova RF, Sudarikova AV, Ilatovskaya DV. Insights Into the Molecular Mechanisms of Polycystic Kidney Diseases. Front Physiol 2021; 12:693130. [PMID: 34566674 PMCID: PMC8456103 DOI: 10.3389/fphys.2021.693130] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 08/10/2021] [Indexed: 12/18/2022] Open
Abstract
Autosomal dominant (AD) and autosomal recessive (AR) polycystic kidney diseases (PKD) are severe multisystem genetic disorders characterized with formation and uncontrolled growth of fluid-filled cysts in the kidney, the spread of which eventually leads to the loss of renal function. Currently, there are no treatments for ARPKD, and tolvaptan is the only FDA-approved drug that alleviates the symptoms of ADPKD. However, tolvaptan has only a modest effect on disease progression, and its long-term use is associated with many side effects. Therefore, there is still a pressing need to better understand the fundamental mechanisms behind PKD development. This review highlights current knowledge about the fundamental aspects of PKD development (with a focus on ADPKD) including the PC1/PC2 pathways and cilia-associated mechanisms, major molecular cascades related to metabolism, mitochondrial bioenergetics, and systemic responses (hormonal status, levels of growth factors, immune system, and microbiome) that affect its progression. In addition, we discuss new information regarding non-pharmacological therapies, such as dietary restrictions, which can potentially alleviate PKD.
Collapse
Affiliation(s)
| | - Regina F Sultanova
- Saint-Petersburg State Chemical Pharmaceutical University, St. Petersburg, Russia.,Department of Physiology, Augusta University, Augusta, GA, United States
| | | | | |
Collapse
|
5
|
Predictors of progression in autosomal dominant and autosomal recessive polycystic kidney disease. Pediatr Nephrol 2021; 36:2639-2658. [PMID: 33474686 PMCID: PMC8292447 DOI: 10.1007/s00467-020-04869-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 10/19/2020] [Accepted: 11/20/2020] [Indexed: 12/15/2022]
Abstract
Autosomal dominant polycystic kidney disease (ADPKD) and autosomal recessive polycystic kidney disease (ARPKD) are characterized by bilateral cystic kidney disease leading to progressive kidney function decline. These diseases also have distinct liver manifestations. The range of clinical presentation and severity of both ADPKD and ARPKD is much wider than was once recognized. Pediatric and adult nephrologists are likely to care for individuals with both diseases in their lifetimes. This article will review genetic, clinical, and imaging predictors of kidney and liver disease progression in ADPKD and ARPKD and will briefly summarize pharmacologic therapies to prevent progression.
Collapse
|
6
|
Assessing the engagement of children and families in selecting patient-reported outcomes (PROs) and developing their measures: a systematic review. Qual Life Res 2020; 30:983-995. [DOI: 10.1007/s11136-020-02690-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/28/2020] [Indexed: 01/14/2023]
|
7
|
Abdel-Nabey M, Saint-Jacques C, Boffa JJ, Frochot V, Livrozet M, Daudon M, Flamant M, Letavernier E, Haymann JP. 24-h Urine Collection: A Relevant Tool in CKD Nutrition Evaluation. Nutrients 2020; 12:nu12092615. [PMID: 32867232 PMCID: PMC7551275 DOI: 10.3390/nu12092615] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Revised: 08/23/2020] [Accepted: 08/24/2020] [Indexed: 12/29/2022] Open
Abstract
Dietary management is a cornerstone of Chronic Kidney Disease (CKD) monitoring, and dietary surveys often difficult to perform. We studied in a CKD patient cohort with two years follow-up, whether validated 24-h urine ionogram would be a relevant tool for diet evaluation and compliance. We included 404 non-dialysis CKD patients, with three evaluations, including repeated measurements of fractional renal creatinine clearance and 24-h urine collection. Completeness of the 24-h urine collection, assessed by daily urine creatinine excretion extrapolated from fractional creatinine clearance, was 64.6%, 75.5%, and 78.2% at the first, second, and third visits, respectively. One hundred sixty-eight patients (41.6%) had three complete collections, with a measured glomerular filtration of 42.3 mL/min/1.73 m2 at baseline and prevalence of anemia and secondary hyperparathyroidism of 13.9% and 26.2%, respectively, increasing during follow-up to 15% and 31.5% (p < 0.001 and p < 0.001). The urine analysis showed at baseline a urine volume of above 2 L/day, and estimated sodium and protein intake within targets in 51.6% and 40.3% of cases, which improved during follow-up only for protein (to 45.9%, p < 0.0001). Our data suggest that a 24-h urine ionogram is an interesting, reliable tool in CKD patients for dietary monitoring to achieve target recommendation noteworthy salt and protein intake.
Collapse
Affiliation(s)
- Moustafa Abdel-Nabey
- Service d’Explorations Fonctionnelles Multidisciplinaires, AP-HP, Hôpital Tenon, Sorbonne Université, 75020 Paris, France; (C.S.-J.); (V.F.); (M.L.); (M.D.); (E.L.)
- Correspondence: (M.A.-N.); (J.-P.H.); Tel.: +33-156-016-774; Fax: +33-156-017-003 (M.A.-N.)
| | - Camille Saint-Jacques
- Service d’Explorations Fonctionnelles Multidisciplinaires, AP-HP, Hôpital Tenon, Sorbonne Université, 75020 Paris, France; (C.S.-J.); (V.F.); (M.L.); (M.D.); (E.L.)
- INSERM, UMR_S 1155, AP-HP, Hôpital Tenon, Sorbonne Université, 75020 Paris, France;
| | - Jean-Jacques Boffa
- INSERM, UMR_S 1155, AP-HP, Hôpital Tenon, Sorbonne Université, 75020 Paris, France;
- Service de Néphrologie, AP-HP, Hôpital Tenon, Sorbonne Université, 75020 Paris, France
| | - Vincent Frochot
- Service d’Explorations Fonctionnelles Multidisciplinaires, AP-HP, Hôpital Tenon, Sorbonne Université, 75020 Paris, France; (C.S.-J.); (V.F.); (M.L.); (M.D.); (E.L.)
- INSERM, UMR_S 1155, AP-HP, Hôpital Tenon, Sorbonne Université, 75020 Paris, France;
| | - Marine Livrozet
- Service d’Explorations Fonctionnelles Multidisciplinaires, AP-HP, Hôpital Tenon, Sorbonne Université, 75020 Paris, France; (C.S.-J.); (V.F.); (M.L.); (M.D.); (E.L.)
- INSERM, UMR_S 1155, AP-HP, Hôpital Tenon, Sorbonne Université, 75020 Paris, France;
| | - Michel Daudon
- Service d’Explorations Fonctionnelles Multidisciplinaires, AP-HP, Hôpital Tenon, Sorbonne Université, 75020 Paris, France; (C.S.-J.); (V.F.); (M.L.); (M.D.); (E.L.)
- INSERM, UMR_S 1155, AP-HP, Hôpital Tenon, Sorbonne Université, 75020 Paris, France;
| | - Martin Flamant
- Department of Physiology, University Paris Descartes-Paris 5, AP-HP, Hôpital Bichat, 75018 Paris, France;
| | - Emmanuel Letavernier
- Service d’Explorations Fonctionnelles Multidisciplinaires, AP-HP, Hôpital Tenon, Sorbonne Université, 75020 Paris, France; (C.S.-J.); (V.F.); (M.L.); (M.D.); (E.L.)
- INSERM, UMR_S 1155, AP-HP, Hôpital Tenon, Sorbonne Université, 75020 Paris, France;
| | - Jean-Philippe Haymann
- Service d’Explorations Fonctionnelles Multidisciplinaires, AP-HP, Hôpital Tenon, Sorbonne Université, 75020 Paris, France; (C.S.-J.); (V.F.); (M.L.); (M.D.); (E.L.)
- INSERM, UMR_S 1155, AP-HP, Hôpital Tenon, Sorbonne Université, 75020 Paris, France;
- Correspondence: (M.A.-N.); (J.-P.H.); Tel.: +33-156-016-774; Fax: +33-156-017-003 (M.A.-N.)
| | | |
Collapse
|
8
|
El-Damanawi R, Lee M, Harris T, Cowley LB, Bond S, Pavey H, Sandford RN, Wilkinson IB, Karet Frankl FE, Hiemstra TF. High water vs. ad libitum water intake for autosomal dominant polycystic kidney disease: a randomized controlled feasibility trial. QJM 2020; 113:258-265. [PMID: 31665476 PMCID: PMC7133783 DOI: 10.1093/qjmed/hcz278] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Revised: 10/02/2019] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Vasopressin stimulates cyst growth in autosomal dominant polycystic kidney disease (ADPKD) and is a key therapeutic target. Evaluation of high water intake as an alternative to pharmacological vasopressin blockade is supported by patients. However feasibility, safety and adherence-promoting strategies required to deliver this remain unknown. AIMS Assess the feasibility of a definitive randomized high water intake trial in ADPKD. METHODS In this prospective open-label randomized trial, adult ADPKD patients with eGFR ≥ 20 ml/min/1.73 m2 were randomized to prescribed high water (HW) intake targeting urine osmolality (UOsm) ≤270 mOsm/kg, or ad libitum (AW) intake (UOsm >300 mOsm/kg). Self-management strategies including home-monitoring of urine-specific gravity (USG) were employed to promote adherence. RESULTS We enrolled 42 participants, baseline median eGFR (HW 68.4 [interquartile range (IQR) 35.9-107.2] vs. AW 75.8 [IQR 59.0-111.0 ml/min/1.73 m2, P = 0.22) and UOsm (HW 353 [IQR 190-438] vs. AW 350 [IQR 240-452] mOsm/kg, P = 0.71) were similar between groups. After 8 weeks, 67% in the HW vs. 24% in AW group achieved UOsm ≤270 mOsm/kg, P = 0.001. HW group achieved lower UOsm (194 [IQR 190-438] vs. 379 [IQR 235-503] mOsm/kg, P = 0.01) and higher urine volumes (3155 [IQR 2270-4295] vs. 1920 [IQR 1670-2960] ml/day, P = 0.02). Two cases of hyponatraemia occurred in HW group. No acute GFR effects were detected. In total 79% (519/672) of USG were submitted and 90% (468/519) were within target. Overall, 17% withdrew during the study. CONCLUSION DRINK demonstrated successful recruitment and adherence leading to separation between treatment arms in primary outcomes. These findings suggest a definitive trial assessing the impact of high water on kidney disease progression in ADPKD is feasible.
Collapse
Affiliation(s)
- R El-Damanawi
- Division of Experimental Medicine and Immunotherapeutics, Department of Medicine, University of Cambridge, Cambridge
- Cambridge Clinical Trials Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge
| | - M Lee
- Division of Anaesthesia, Department of Medicine, University of Cambridge, Cambridge
| | - T Harris
- PKD Charity, 91 Royal College, London
| | - L B Cowley
- Cambridge Clinical Trials Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge
- Patient Led Research Hub, Cambridge NIHR Biomedical Research Centre, Cambridge
| | - S Bond
- Cambridge Clinical Trials Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge
| | - H Pavey
- Cambridge Clinical Trials Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge
| | - R N Sandford
- Department of Medical Genetics, University of Cambridge, Hills Road, Cambridge, UK
| | - I B Wilkinson
- Division of Experimental Medicine and Immunotherapeutics, Department of Medicine, University of Cambridge, Cambridge
- Cambridge Clinical Trials Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge
| | - F E Karet Frankl
- Department of Medical Genetics, University of Cambridge, Hills Road, Cambridge, UK
| | - T F Hiemstra
- Division of Experimental Medicine and Immunotherapeutics, Department of Medicine, University of Cambridge, Cambridge
- Cambridge Clinical Trials Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge
- Address correspondence to Dr T.F. Hiemstra, Cambridge Clinical Trials Unit, Box 401 Cambridge Biomedical Camp us, Hills Road, Cambridge CB2 0QQ, UK.
| |
Collapse
|
9
|
Testa F, Magistroni R. ADPKD current management and ongoing trials. J Nephrol 2019; 33:223-237. [PMID: 31853789 DOI: 10.1007/s40620-019-00679-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Accepted: 11/24/2019] [Indexed: 12/14/2022]
Abstract
Among the diseases that require renal replacement therapy (RRT), ADPKD is the fourth for incidence and prevalence. In Italy, there are at least 32,000 patients affected by ADPKD, of which about 2900 in dialysis. The pure costs of dialysis treatment for the Italian National Health Service can be conservatively estimated at 87 million euros per year. Even a modest slowdown in the evolution of the disease would obtain an important result in terms of reduction of health expenditure. In recent years, many new or repurposed drugs have been evaluated in clinical trials for ADPKD. In this review we will mainly focus on advanced stage clinical trials (phase 2 and 3). We have grouped these studies according to the molecular pathway addressed by the experimental drug or the therapeutic strategy. More than 10 years after the start of the first Phase III clinical trials in ADPKD, the first drug active in slowing disease progression is finally available. It cannot be considered a goal but only the beginning of a journey because of the significant side effects and the high cost of Tolvaptan. An exuberant basic research activity in the field, together with the large number of ongoing protocols, keep the nephrologists and their patients positive with regard to the discovery of new and better therapies in a not-too-distant future.
Collapse
Affiliation(s)
- Francesca Testa
- UOC Divisione di Nefrologia Dialisi e Trapianto, AOU Policlinico di Modena, Modena, Italy
| | - Riccardo Magistroni
- UOC Divisione di Nefrologia Dialisi e Trapianto, AOU Policlinico di Modena, Modena, Italy. .,Dipartimento Chirurgico Medico Odontoiatrico e di Scienze Morfologiche con Interesse Trapiantologico, Oncologico e di Medicina Rigenerativa, Università di Modena e Reggio Emilia, Modena, Italy.
| |
Collapse
|
10
|
Carriazo S, Perez-Gomez MV, Cordido A, García-González MA, Sanz AB, Ortiz A, Sanchez-Niño MD. Dietary Care for ADPKD Patients: Current Status and Future Directions. Nutrients 2019; 11:nu11071576. [PMID: 31336917 PMCID: PMC6683072 DOI: 10.3390/nu11071576] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 07/05/2019] [Accepted: 07/09/2019] [Indexed: 02/07/2023] Open
Abstract
Autosomal dominant polycystic kidney disease (ADPKD) is the most common genetic nephropathy, and tolvaptan is the only therapy available. However, tolvaptan slows but does not stop disease progression, is marred by polyuria, and most patients worldwide lack access. This and recent preclinical research findings on the glucose-dependency of cyst-lining cells have renewed interest in the dietary management of ADPKD. We now review the current dietary recommendations for ADPKD patients according to clinical guidelines, the evidence base for those, and the potential impact of preclinical studies addressing the impact of diet on ADPKD progression. The clinical efficacy of tolvaptan has put the focus on water intake and solute ingestion as modifiable factors that may impact tolvaptan tolerance and ADPKD progression. By contrast, dietary modifications suggested to ADPKD patients, such as avoiding caffeine, are not well supported and their impact is unknown. Recent studies have identified a chronic shift in energy production from mitochondrial oxidative phosphorylation to aerobic glycolysis (Warburg effect) as a contributor to cyst growth, rendering cyst cells exquisitely sensitive to glucose availability. Therefore, low calorie or ketogenic diets have delayed preclinical ADPKD progression. Additional preclinical data warn of potential negative impact of excess dietary phosphate or oxalate in ADPKD progression.
Collapse
Affiliation(s)
- Sol Carriazo
- Department of Nephrology and Hypertension, IIS-Fundacion Jimenez Diaz UAM, 28040 Madrid, Spain
- Red de Investigación Renal (REDINREN), 28029 Madrid, Spain
| | - Maria Vanessa Perez-Gomez
- Department of Nephrology and Hypertension, IIS-Fundacion Jimenez Diaz UAM, 28040 Madrid, Spain
- Red de Investigación Renal (REDINREN), 28029 Madrid, Spain
| | - Adrian Cordido
- Red de Investigación Renal (REDINREN), 28029 Madrid, Spain
- Grupo de Genética y Biología del Desarrollo de las Enfermedades Renales, Laboratorio de Nefrología (n.°11), Instituto de Investigación Sanitaria (IDIS), Complexo Hospitalario de Santiago de Compostela (CHUS), 15706 Santiago de Compostela, Spain
| | - Miguel Angel García-González
- Red de Investigación Renal (REDINREN), 28029 Madrid, Spain
- Grupo de Genética y Biología del Desarrollo de las Enfermedades Renales, Laboratorio de Nefrología (n.°11), Instituto de Investigación Sanitaria (IDIS), Complexo Hospitalario de Santiago de Compostela (CHUS), 15706 Santiago de Compostela, Spain
| | - Ana Belen Sanz
- Department of Nephrology and Hypertension, IIS-Fundacion Jimenez Diaz UAM, 28040 Madrid, Spain
- Red de Investigación Renal (REDINREN), 28029 Madrid, Spain
| | - Alberto Ortiz
- Department of Nephrology and Hypertension, IIS-Fundacion Jimenez Diaz UAM, 28040 Madrid, Spain.
- Red de Investigación Renal (REDINREN), 28029 Madrid, Spain.
| | - Maria Dolores Sanchez-Niño
- Department of Nephrology and Hypertension, IIS-Fundacion Jimenez Diaz UAM, 28040 Madrid, Spain.
- Red de Investigación Renal (REDINREN), 28029 Madrid, Spain.
| |
Collapse
|
11
|
Mader LB, Harris T, Kläger S, Wilkinson IB, Hiemstra TF. Inverting the patient involvement paradigm: defining patient led research. RESEARCH INVOLVEMENT AND ENGAGEMENT 2018; 4:21. [PMID: 30002875 PMCID: PMC6038253 DOI: 10.1186/s40900-018-0104-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 06/29/2018] [Indexed: 05/21/2023]
Abstract
PLAIN ENGLISH SUMMARY Patients usually understand their disease and lifestyle needs better than many medical professionals. They also have important ideas about what research would be most beneficial to their lives, especially on how to manage symptoms in a way that improves daily quality of life. In the UK, the National Institute for Health Research has recognised the value of patient insight, and now requires researchers with public funding to involve patients and the public throughout the research process. There are many opportunities for involvement, but these generally focus on improving study design to ensure the trial is acceptable to participants. Some programmes work towards setting research priorities as important to patients, public members, and medical experts, but due to the complexity and cost involved in running clinical trials, the majority of research originates with the pharmaceutical industry or academic institutions. There is a clear mismatch between research ideas that patients prioritise (quality of life), and those actually investigated (drug development).The Patient Led Research Hub (PLRH) is a new initiative hosted by the Cambridge Clinical Trials Unit. The PLRH supports research ideas as proposed by patient organisations, providing resources and expertise in research design and delivery. The PLRH aims to co-produce any technically feasible project, regardless of disease or symptom focus. The proposing patient group maintains ownership of the project with an active role in study management. This method of research has proven to produce credible research studies that are of direct relevance to patients. ABSTRACT Patient and Public Involvement has become an indispensable and expected component of healthcare research in the United Kingdom, largely driven by the National Institute of Health Research and other research funders. Opportunities for patients to become involved in research abound, and many organisations now have dedicated 'public involvement' teams. However, its value is often questioned amidst criticism of tokenism and the recognition that a mismatch persists between patient priorities and funded research. Although patients are frequently consulted, evidence that their involvement influences the research agenda remains limited. We propose a novel model that allows patients and the public not only to propose research questions, but to design, initiate and deliver their own research with all the necessary support from research professionals. We demonstrate the feasibility and utility of this approach in reporting the establishment, experiences and progress of the Patient Led Research Hub. Using this resource, patient organisations are now able to initiate and conduct rigorous clinical research unfettered by the constraints of academic or economic agendas.
Collapse
Affiliation(s)
- Laura B. Mader
- Cambridge Clinical Trials Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
- School of Clinical Medicine, University of Cambridge, Cambridge, UK
| | - Tess Harris
- Polycystic Kidney Disease Charity, London, UK
| | - Sabine Kläger
- Cambridge Clinical Trials Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Ian B. Wilkinson
- Cambridge Clinical Trials Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
- School of Clinical Medicine, University of Cambridge, Cambridge, UK
| | - Thomas F. Hiemstra
- Cambridge Clinical Trials Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
- School of Clinical Medicine, University of Cambridge, Cambridge, UK
| |
Collapse
|