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Chui H, McMahon KR, Rassekh SR, Schultz KR, Blydt-Hansen TD, Mammen C, Pinsk M, Cuvelier GDE, Carleton BC, Tsuyuki RT, Ross CJD, Devarajan P, Huynh L, Yordanova M, Crépeau-Hubert F, Wang S, Cockovski V, Palijan A, Zappitelli M. Urinary TIMP-2*IGFBP-7 to diagnose acute kidney injury in children receiving cisplatin. Pediatr Nephrol 2024; 39:269-282. [PMID: 37365422 DOI: 10.1007/s00467-023-06007-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 04/20/2023] [Accepted: 04/21/2023] [Indexed: 06/28/2023]
Abstract
BACKGROUND Cisplatin is associated with acute kidney injury (AKI) and electrolyte abnormalities. Urine tissue inhibitor of metalloproteinase 2 (TIMP-2) and insulin-like growth factor-binding protein 7 (IGFBP-7) may be early cisplatin-AKI biomarkers. METHODS We conducted a 12-site prospective cohort study with pediatric patients treated with cisplatin (May 2013-December 2017). Blood and urine (measured for TIMP-2, IGFBP-7) were collected pre-cisplatin, 24-h post-cisplatin, and near hospital discharge during the first or second cisplatin cycle (early visit (EV)) and during second-to-last or last cisplatin cycle (late visit (LV)). PRIMARY OUTCOME serum creatinine (SCr)-defined AKI (≥ stage 1). RESULTS At EV (median (interquartile (IQR)) age: 6 (2-12) years; 78 (50%) female), 46/156 (29%) developed AKI; at LV, 22/127 (17%) experienced AKI. At EV, TIMP-2, IGFBP-7, and TIMP-2*IGFBP-7 pre-cisplatin infusion concentrations were significantly higher in participants with vs. those without AKI. At EV and LV, biomarker concentrations were significantly lower in participants with vs. those without AKI at post-infusion and near-hospital discharge. Biomarker values normalized to urine creatinine were higher in patients with AKI compared to without (LV post-infusion, median (IQR): TIMP-2*IGFBP-7: 0.28 (0.08-0.56) vs. 0.04 (0.02-0.12) (ng/mg creatinine)2/1000; P < .001). At EV, pre-infusion biomarker concentrations had the highest area under the curves (AUC) (range: 0.61-0.62) for AKI diagnosis; at LV, biomarkers measured post-infusion and near discharge yielded the highest AUCs (range: 0.64-0.70). CONCLUSIONS TIMP-2*IGFBP-7 were poor to modest at detecting AKI post-cisplatin. Additional studies are needed to determine whether raw biomarker values or biomarker values normalized to urinary creatinine are more strongly associated with patient outcomes. A higher resolution version of the Graphical abstract is available as Supplementary information.
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Affiliation(s)
- Hayton Chui
- Department of Pediatrics, Division of Nephrology, Peter Gilgan Centre For Research and Learning, Child Health Evaluative Sciences, Toronto Hospital for Sick Children, University of Toronto, Room 11th Floor, 11.9722, 686 Bay Street, Toronto, ON, M5G 0A4, Canada
- Faculty of Health Sciences, Queen's University, Kingston, ON, Canada
| | - Kelly R McMahon
- Department of Pediatrics, Division of Nephrology, Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Shahrad Rod Rassekh
- Department of Pediatrics, Division of Hematology/Oncology/Bone Marrow Transplantation, University of British Columbia, British Columbia Children's Hospital, Vancouver, BC, Canada
| | - Kirk R Schultz
- Department of Pediatrics, Division of Hematology/Oncology/Bone Marrow Transplantation, University of British Columbia, British Columbia Children's Hospital, Vancouver, BC, Canada
| | - Tom D Blydt-Hansen
- Department of Pediatrics, Division of Pediatric Nephrology, University of British Columbia, British Columbia Children's Hospital, Vancouver, BC, Canada
| | - Cherry Mammen
- Department of Pediatrics, Division of Pediatric Nephrology, University of British Columbia, British Columbia Children's Hospital, Vancouver, BC, Canada
| | - Maury Pinsk
- Department of Pediatrics and Child Health, Section of Pediatric Nephrology, University of Manitoba, Winnipeg, MB, Canada
| | - Geoffrey D E Cuvelier
- Department of Pediatrics and Child Health, Division of Pediatric Oncology-Hematology-BMT, University of Manitoba, CancerCare Manitoba, Winnipeg, MB, Canada
| | - Bruce C Carleton
- Division of Translational Therapeutics, Department of Pediatrics, Faculty of Medicine, University of British Columbia and BC Children's Hospital and Research Institute, Vancouver, BC, Canada
| | - Ross T Tsuyuki
- Epidemiology Coordinating and Research (EPICORE) Centre, Departments of Medicine and Pharmacology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Colin J D Ross
- Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Prasad Devarajan
- Division of Nephrology and Hypertension, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Louis Huynh
- Faculty of Health Sciences, Queen's University, Kingston, ON, Canada
| | - Mariya Yordanova
- Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Frédérik Crépeau-Hubert
- Department of Pediatrics, Division of Nephrology, Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Stella Wang
- Department of Pediatrics, Division of Nephrology, Peter Gilgan Centre For Research and Learning, Child Health Evaluative Sciences, Toronto Hospital for Sick Children, University of Toronto, Room 11th Floor, 11.9722, 686 Bay Street, Toronto, ON, M5G 0A4, Canada
| | - Vedran Cockovski
- Department of Pediatrics, Division of Nephrology, Peter Gilgan Centre For Research and Learning, Child Health Evaluative Sciences, Toronto Hospital for Sick Children, University of Toronto, Room 11th Floor, 11.9722, 686 Bay Street, Toronto, ON, M5G 0A4, Canada
| | - Ana Palijan
- Department of Pediatrics, Division of Nephrology, Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Michael Zappitelli
- Department of Pediatrics, Division of Nephrology, Peter Gilgan Centre For Research and Learning, Child Health Evaluative Sciences, Toronto Hospital for Sick Children, University of Toronto, Room 11th Floor, 11.9722, 686 Bay Street, Toronto, ON, M5G 0A4, Canada.
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2
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Wiebe C, Balshaw R, Gibson IW, Ho J, Shaw J, Karpinski M, Trachtenberg A, Pochinco D, Goldberg A, Birk P, Pinsk M, Rush DN, Nickerson PW. A rational approach to guide cost-effective de novo donor-specific antibody surveillance with tacrolimus immunosuppression. Am J Transplant 2023; 23:1882-1892. [PMID: 37543094 DOI: 10.1016/j.ajt.2023.07.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 07/26/2023] [Accepted: 07/27/2023] [Indexed: 08/07/2023]
Abstract
De novo donor-specific antibody (dnDSA) after renal transplantation has been shown to correlate with antibody-mediated rejection and allograft loss. However, the lack of proven interventions and the time and cost associated with annual screening for dnDSA are difficult to justify for all recipients. We studied a well-characterized consecutive cohort (n = 949) with over 15 years of prospective dnDSA surveillance to identify risk factors that would help institute a resource-responsible surveillance strategy. Younger recipient age and HLA-DR/DQ molecular mismatch were independent predictors of dnDSA development. Combining both risk factors into recipient age molecular mismatch categories, we found that 52% of recipients could be categorized as low-risk for dnDSA development (median subclinical dnDSA-free survival at 5 and 10 years, 98% and 97%, respectively). After adjustment, multivariate correlates of dnDSA development included tacrolimus versus cyclosporin maintenance immunosuppression (hazard ratio [HR], 0.37; 95% CI, 0.2-0.6; P < .0001) and recipient age molecular mismatch category: intermediate versus low (HR, 2.48; 95% CI, 1.5-4.2; P = .0007), high versus intermediate (HR, 2.56; 95% CI, 1.6-4.2; P = .0002), and high versus low (HR, 6.36; 95% CI, 3.7-10.8; P < .00001). When combined, recipient age and HLA-DR/DQ molecular mismatch provide a novel data-driven approach to reduce testing by >50% while selecting those most likely to benefit from dnDSA surveillance.
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Affiliation(s)
- Chris Wiebe
- Department of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada; Department of Immunology, University of Manitoba, Winnipeg, Manitoba, Canada; Shared Health Services Manitoba, Winnipeg, Manitoba, Canada.
| | - Rob Balshaw
- George and Fay Yee Centre for Healthcare Innovation, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Ian W Gibson
- Shared Health Services Manitoba, Winnipeg, Manitoba, Canada; Department of Pathology, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Julie Ho
- Department of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada; Department of Immunology, University of Manitoba, Winnipeg, Manitoba, Canada; Shared Health Services Manitoba, Winnipeg, Manitoba, Canada
| | - Jamie Shaw
- Department of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Martin Karpinski
- Department of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Aaron Trachtenberg
- Department of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada
| | | | - Aviva Goldberg
- Department of Pediatrics and Child Health, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Patricia Birk
- Department of Pediatrics and Child Health, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Maury Pinsk
- Department of Pediatrics and Child Health, University of Manitoba, Winnipeg, Manitoba, Canada
| | - David N Rush
- Department of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada; Shared Health Services Manitoba, Winnipeg, Manitoba, Canada
| | - Peter W Nickerson
- Department of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada; Department of Immunology, University of Manitoba, Winnipeg, Manitoba, Canada; Shared Health Services Manitoba, Winnipeg, Manitoba, Canada
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3
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Ulrich EH, Harvey E, Morgan CJ, Pinsk M, Erickson R, Robinson LA, Alexander RT. Mutations in CLDN2 Are Not a Common Cause of Pediatric Idiopathic Hypercalciuria in Canada. Can J Kidney Health Dis 2022; 9:20543581221098782. [PMID: 35615069 PMCID: PMC9125053 DOI: 10.1177/20543581221098782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 03/11/2022] [Indexed: 11/30/2022] Open
Abstract
Background: Hypercalciuria is the most common risk factor for kidney stone formation, including in pediatric patients. However, the etiology is often unknown and children are frequently diagnosed with idiopathic hypercalciuria. Nearly 50% of children with hypercalciuria have a first-degree relative with kidney stones, suggesting a strong genetic basis for this disease. A failure of calcium reabsorption from the proximal nephron is implicated in the pathogenesis of hypercalciuria. Claudin-2 is a tight junction protein abundantly expressed in the proximal tubule. It confers paracellular permeability to calcium that is essential for transport across the proximal tubule where the majority of filtered calcium is reabsorbed. Objective: Our objective was to examine the frequency of coding variations in CLDN2 in a cohort of children with idiopathic hypercalciuria. Design: Mixed method including retrospective chart review and patient interview, followed by genetic sequencing. Setting: Three tertiary care centers in Canada. Patients: Children (age 1-18 years) with idiopathic hypercalciuria. Patients with other causes of hypercalciuria were excluded. Methods: Data were collected from 40 patients with idiopathic hypercalciuria. Informed consent to collect DNA was obtained from 13 patients, and the final and only coding exon of CLDN2 was sequenced. Results: The majority of patients were male, white, and had a positive family history of kidney stones. Parathyroid hormone levels were significantly lower than the reference range (P < .001). The levels of 1,25-dihydroxyvitamin D were also significantly higher in our patient cohort, relative to the reference range (P < .001). Sequence analysis of CLDN2 did not identify any coding variations. Limitations: Sequencing analysis was limited to the final coding exon and small sample size. Conclusions: CLDN2 coding variations are not a common cause of idiopathic hypercalciuria in Canadian children. Further study is needed to determine the causes of hypercalciuria in pediatric patients and develop targeted therapies.
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McMahon KR, Chui H, Rassekh SR, Schultz KR, Blydt-Hansen TD, Mammen C, Pinsk M, Cuvelier GDE, Carleton BC, Tsuyuki RT, Ross CJ, Devarajan P, Huynh L, Yordanova M, Crépeau-Hubert F, Wang S, Cockovski V, Palijan A, Zappitelli M. Urine Neutrophil Gelatinase-Associated Lipocalin and Kidney Injury Molecule-1 to Detect Pediatric Cisplatin-Associated Acute Kidney Injury. Kidney360 2021; 3:37-50. [PMID: 35368557 PMCID: PMC8967607 DOI: 10.34067/kid.0004802021] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 10/29/2021] [Indexed: 01/12/2023]
Abstract
Background Few studies have described associations between the AKI biomarkers urinary neutrophil gelatinase-associated lipocalin (NGAL) and kidney injury molecule-1 (KIM-1) with AKI in cisplatin-treated children. We aimed to describe excretion patterns of urine NGAL and KIM-1 and associations with AKI in children receiving cisplatin. Methods Participants (n=159) were enrolled between 2013 and 2017 in a prospective cohort study conducted in 12 Canadian pediatric hospitals. Participants were evaluated at early cisplatin infusions (at first or second cisplatin cycle) and late cisplatin infusions (last or second-to-last cycle). Urine NGAL and KIM-1 were measured (1) pre-cisplatin infusion, (2) post-infusion (morning after), and (3) at hospital discharge at early and late cisplatin infusions. Primary outcome: AKI defined by serum creatinine rise within 10 days post-cisplatin, on the basis of Kidney Disease Improving Global Outcomes guidelines criteria (stage 1 or higher). Results Of 159 children, 156 (median [interquartile range (IQR)] age: 5.8 [2.4-12.0] years; 78 [50%] female) had biomarker data available at early cisplatin infusions and 127 had data at late infusions. Forty six of the 156 (29%) and 22 of the 127 (17%) children developed AKI within 10 days of cisplatin administration after early and late infusions, respectively. Urine NGAL and KIM-1 concentrations were significantly higher in patients with versus without AKI (near hospital discharge of late cisplatin infusion, median [IQR] NGAL levels were 76.1 [10.0-232.7] versus 14.9 [5.4-29.7] ng/mg creatinine; KIM-1 levels were 4415 [2083-9077] versus 1049 [358-3326] pg/mg creatinine; P<0.01). These markers modestly discriminated for AKI (area under receiver operating characteristic curve [AUC-ROC] range: NGAL, 0.56-0.72; KIM-1, 0.48-0.75). Biomarker concentrations were higher and better discriminated for AKI at late cisplatin infusions (AUC-ROC range, 0.54-0.75) versus early infusions (AUC-ROC range, 0.48-0.65). Conclusions Urine NGAL and KIM-1 were modest at discriminating for cisplatin-associated AKI. Further research is needed to determine clinical utility and applicability of these markers and associations with late kidney outcomes.
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Affiliation(s)
- Kelly R. McMahon
- Division of Nephrology, Department of Pediatrics, Research Institute of the McGill University Health Centre, McGill University Health Centre, Montreal Children’s Hospital, Montreal, Quebec, Canada,Division of Experimental Medicine, Faculty of Medicine, McGill University, Montreal, Quebec, Canada
| | - Hayton Chui
- Peter Gilgan Centre for Research and Learning, Toronto, Ontario, Canada,Faculty of Health Sciences, McMaster Health Sciences Centre, McMaster University, Hamilton, Ontario, Canada
| | - Shahrad Rod Rassekh
- Division of Hematology/Oncology/Bone Marrow Transplantation, Department of Pediatrics, University of British Columbia, British Columbia Children’s Hospital, Vancouver, British Columbia, Canada
| | - Kirk R. Schultz
- Division of Hematology/Oncology/Bone Marrow Transplantation, Department of Pediatrics, University of British Columbia, British Columbia Children’s Hospital, Vancouver, British Columbia, Canada
| | - Tom D. Blydt-Hansen
- Division of Pediatric Nephrology, Department of Pediatrics, University of British Columbia, British Columbia Children’s Hospital, Vancouver, British Columbia, Canada
| | - Cherry Mammen
- Division of Pediatric Nephrology, Department of Pediatrics, University of British Columbia, British Columbia Children’s Hospital, Vancouver, British Columbia, Canada
| | - Maury Pinsk
- Department of Pediatrics and Child Health, Section of Pediatric Nephrology, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Geoffrey D. E. Cuvelier
- Division of Pediatric Oncology-Hematology-BMT, Department of Pediatrics and Child Health, University of Manitoba, CancerCare Manitoba, Winnipeg, Manitoba, Canada
| | - Bruce C. Carleton
- Division of Translational Therapeutics, Department of Pediatrics, University of British Columbia and BC Children’s Hospital and Research Institute, Vancouver, British Columbia, Canada
| | - Ross T. Tsuyuki
- EPICORE Centre, Department of Pharmacology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Colin J.D. Ross
- Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Prasad Devarajan
- Division of Nephrology and Hypertension, Cincinnati Children’s Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Louis Huynh
- Faculty of Health Sciences, Queen’s University, Kingston, Ontario, Canada
| | - Mariya Yordanova
- Faculty of Medicine and Health Sciences, Sherbrooke University, Sherbrooke, Quebec, Canada
| | - Frédérik Crépeau-Hubert
- Division of Nephrology, Department of Pediatrics, Research Institute of the McGill University Health Centre, McGill University Health Centre, Montreal Children’s Hospital, Montreal, Quebec, Canada
| | - Stella Wang
- Peter Gilgan Centre for Research and Learning, Toronto, Ontario, Canada
| | - Vedran Cockovski
- Peter Gilgan Centre for Research and Learning, Toronto, Ontario, Canada
| | - Ana Palijan
- Division of Nephrology, Department of Pediatrics, Research Institute of the McGill University Health Centre, McGill University Health Centre, Montreal Children’s Hospital, Montreal, Quebec, Canada
| | - Michael Zappitelli
- Peter Gilgan Centre for Research and Learning, Toronto, Ontario, Canada,Department of Pediatrics, Division of Nephrology, Toronto Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
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Elliott MJ, Allu S, Beaucage M, McKenzie S, Kappel J, Harvey R, Morrin L, Soroka S, Graham J, Harding C, Pinsk M, Harris H, Tang M, Manns B. Defining the Scope of Knowledge Translation Within a National, Patient-Oriented Kidney Research Network. Can J Kidney Health Dis 2021; 8:20543581211004803. [PMID: 33889417 PMCID: PMC8040615 DOI: 10.1177/20543581211004803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 02/22/2021] [Indexed: 11/17/2022] Open
Abstract
Purpose of program: Integrated knowledge translation (IKT) is a collaborative approach whereby knowledge created through health research is utilized in ways that are relevant to the needs of all stakeholders. However, research teams have limited capacity and know-how for achieving IKT, resulting in a disconnect between the generation and application of knowledge. The goal of this report is to describe how IKT research was achieved across a large-scale, patient-oriented research network, Canadians Seeking Solutions and Innovations to Overcome Chronic Kidney Disease (Can-SOLVE CKD). Sources of information: Resources to facilitate knowledge translation (KT) planning across the network were developed by the Can-SOLVE CKD Knowledge User/Knowledge Translation Committee with reference to established Canadian KT and patient engagement tools and frameworks, review of the published and gray literature, and expertise of committee members. Methods: The Can-SOLVE CKD Knowledge User/Knowledge Translation Committee consisting of patient partners, health care providers, policymakers, and researchers provided oversight of the development and implementation of the network’s IKT initiatives. Guided by its strategic framework, the committee developed KT planning templates and review checklists to assist network projects with preparing for dissemination, implementation, and scale and spread of their interventions. The committee has acted in a consultative capacity to facilitate IKT across network initiatives and has supported capacity building through KT activities aimed at network membership and knowledge users more broadly. Key findings: The Can-SOLVE CKD Knowledge User/Knowledge Translation Committee established a nation-wide strategy for KT infrastructure and capacity building. Acting as a knowledge intermediary, the committee has connected research teams with knowledge users across Canada to support practices and policies informed by evidence generated by the network. The committee has developed KT initiatives, including a Community of Practice, whereby participants across different regions and disciplines convene regularly to share health research knowledge and communications strategies relevant to the network. Critically, patients are engaged and contribute throughout the research process. Examples of IKT activities from select projects are provided, as well as ways for sustaining the network’s KT platform. Limitations: The KT resources developed by the committee were adapted from other established resources to meet the needs of the network and have not undergone formal evaluation in this context. Given the broad scope of the network, resources to facilitate implementation and knowledge user engagement may not meet the needs of all initiatives and must be tailored accordingly. Knowledge barriers, including a lack of information and skills related to conceptual and practical aspects of KT, among network members provided a rationale for various KT capacity–building initiatives. Implications: The approach described here offers a practical method for achieving IKT, including how to plan, implement, and sustain initiatives across large-scale health research networks. Within the context of Can-SOLVE CKD, these efforts will shorten knowledge-practice gaps through producing and applying relevant research to improve the lives of people living with kidney disease.
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Affiliation(s)
| | | | | | | | | | | | - Louise Morrin
- Medicine Strategic Clinical Network, Alberta Health Services, Calgary, Canada
| | | | | | | | | | | | - Mila Tang
- Can-SOLVE CKD Network, Vancouver, BC, Canada
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Holden RM, Mustafa RA, Alexander RT, Battistella M, Bevilacqua MU, Knoll G, Mac-Way F, Reslerova M, Wald R, Acott PD, Feltmate P, Grill A, Jindal KK, Karsanji M, Kiberd BA, Mahdavi S, McCarron K, Molnar AO, Pinsk M, Rodd C, Soroka SD, Vinson AJ, Zimmerman D, Clase CM. Canadian Society of Nephrology Commentary on the Kidney Disease Improving Global Outcomes 2017 Clinical Practice Guideline Update for the Diagnosis, Evaluation, Prevention, and Treatment of Chronic Kidney Disease-Mineral and Bone Disorder. Can J Kidney Health Dis 2020; 7:2054358120944271. [PMID: 32821415 PMCID: PMC7412914 DOI: 10.1177/2054358120944271] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 06/06/2020] [Indexed: 12/23/2022] Open
Abstract
Purpose of review: (1) To provide commentary on the 2017 update to the Kidney Disease Improving Global Outcomes (KDIGO) 2017 Clinical Practice Guideline Update for the Diagnosis, Evaluation, Prevention, and Treatment of Chronic Kidney Disease-Mineral and Bone Disorder (CKD-MBD); (2) to apply the evidence-based guideline update for implementation within the Canadian health care system; (3) to provide comment on the care of children with chronic kidney disease (CKD); and (4) to identify research priorities for Canadian patients. Sources of information: The KDIGO 2017 Clinical Practice Guideline Update for the Diagnosis, Evaluation, Prevention, and Treatment of CKD-MBD. Methods: The commentary committee co-chairs selected potential members based on their knowledge of the Canadian kidney community, aiming for wide representation from relevant disciplines, academic and community centers, and different geographical regions. Key findings: We agreed with many of the recommendations in the clinical practice guideline on the diagnosis, evaluation, prevention, and treatment of CKD-MBD. However, based on the uncommon occurrence of abnormalities in calcium and phosphate and the low likelihood of severe abnormalities in parathyroid hormone (PTH), we recommend against screening and monitoring levels of calcium, phosphate, PTH, and alkaline phosphatase in adults with CKD G3. We suggest and recommend monitoring these parameters in adults with CKD G4 and G5, respectively. In children, we agree that monitoring for CKD-MBD should begin in CKD G2, but we suggest measuring ionized calcium, rather than total calcium or calcium adjusted for albumin. With regard to vitamin D, we suggest against routine screening for vitamin D deficiency in adults with CKD G3-G5 and G1T-G5T and suggest following population health recommendations for adequate vitamin D intake. We recommend that the measurement and management of bone mineral density (BMD) be according to general population guidelines in CKD G3 and G3T, but we suggest against routine BMD testing in CKD G4-G5, CKD G4T-5T, and in children with CKD. Based on insufficient data, we also recommend against routine bone biopsy in clinical practice for adults with CKD or CKD-T, or in children with CKD, although we consider it an important research tool. Limitations: The committee relied on the evidence summaries produced by KDIGO. The CSN committee did not replicate or update the systematic reviews.
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Affiliation(s)
- Rachel M Holden
- Division of Nephrology, Department of Medicine, Queen's University, Kingston, ON, Canada
| | - Reem A Mustafa
- Division of Nephrology and Hypertension, Department of Internal Medicine, The University of Kansas Medical Center, Kansas City, USA.,Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, ON, Canada
| | - R Todd Alexander
- Department of Pediatrics and Physiology, University of Alberta, Edmonton, Canada
| | - Marisa Battistella
- University Health Network, Leslie Dan Faculty of Pharmacy, University of Toronto, ON, Canada
| | - Micheli U Bevilacqua
- Division of Nephrology, Department of Medicine, The University of British Columbia, Vancouver, Canada
| | - Greg Knoll
- Division of Nephrology, The Ottawa Hospital, ON, Canada
| | - Fabrice Mac-Way
- Division of Nephrology, CHU de Québec, Hôtel-Dieu de Québec Hospital, Université Laval, Québec City, QC, Canada
| | - Martina Reslerova
- Nephrology Section, St. Boniface General Hospital, University of Manitoba, Winnipeg, Canada
| | - Ron Wald
- Division of Nephrology, St. Michael's Hospital, University of Toronto, ON, Canada
| | - Philip D Acott
- Division of Nephrology, Department of Pediatrics, Dalhousie University, Halifax, NS, Canada
| | - Patrick Feltmate
- Department of Geriatric Medicine, Dalhousie University, Halifax, NS, Canada
| | - Allan Grill
- Department of Family & Community Medicine, University of Toronto, ON, Canada
| | - Kailash K Jindal
- Division of Nephrology, Department of Medicine, University of Alberta, Edmonton, Canada
| | - Meena Karsanji
- Professional Practice, Vancouver Coastal Health, Richmond, BC, Canada
| | - Bryce A Kiberd
- Division of Nephrology, Department of Medicine, Dalhousie University, Halifax, NS, Canada
| | - Sara Mahdavi
- Department of Nutritional Sciences, University of Toronto, ON, Canada.,Department of Nephrology, Scarborough Health Network, ON, Canada
| | - Kailee McCarron
- Nova Scotia Renal Program, Nova Scotia Health Authority, Halifax, Canada
| | - Amber O Molnar
- Division of Nephrology, McMaster University, Hamilton, ON, Canada
| | - Maury Pinsk
- Division of Nephrology, Department of Pediatrics & Child Health, University of Manitoba, Winnipeg, Canada
| | - Celia Rodd
- Division of Diabetes & Endocrinology, Department of Pediatrics & Child Health, University of Manitoba, Winnipeg, Canada
| | - Steven D Soroka
- Division of Nephrology, Department of Medicine, Dalhousie University, NSHA Renal Program and Pharmacy Services, Halifax, NS, Canada
| | - Amanda J Vinson
- Division of Nephrology, Dalhousie University, Halifax, NS, Canada
| | - Deborah Zimmerman
- Division of Nephrology, Department of Medicine, University of Ottawa, ON, Canada
| | - Catherine M Clase
- Division of Nephrology, Department of Medicine, Department of Health Research, Evidence and Impact, McMaster University, Hamilton, ON, Canada
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7
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McMahon KR, Rassekh SR, Schultz KR, Blydt-Hansen T, Cuvelier GDE, Mammen C, Pinsk M, Carleton BC, Tsuyuki RT, Ross CJD, Palijan A, Huynh L, Yordanova M, Crépeau-Hubert F, Wang S, Boyko D, Zappitelli M. Epidemiologic Characteristics of Acute Kidney Injury During Cisplatin Infusions in Children Treated for Cancer. JAMA Netw Open 2020; 3:e203639. [PMID: 32383745 PMCID: PMC7210480 DOI: 10.1001/jamanetworkopen.2020.3639] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
IMPORTANCE Few multicenter pediatric studies have comprehensively described the epidemiologic characteristics of cisplatin-associated acute kidney injury using standardized definitions. OBJECTIVE To examine the rate of and risk factors associated with acute kidney injury among children receiving cisplatin infusions. DESIGN, SETTING, AND PARTICIPANTS This prospective cohort study examined children (aged <18 years) recruited from May 23, 2013, to March 31, 2017, at 12 Canadian pediatric academic health centers who were receiving 1 or more cisplatin infusion. Children whose estimated or measured glomerular filtration rate (GFR) was less than 30 mL/min/1.73 m2 or who had received a kidney transplant were excluded. Data analysis was performed from January 3, 2018, to September 20, 2019. EXPOSURES Cisplatin infusions. MAIN OUTCOMES AND MEASURES The primary outcome was acute kidney injury during cisplatin infusion, defined using a Kidney Disease: Improving Global Outcomes serum creatinine criteria-based definition (stage 1 or higher). The secondary outcome was acute kidney injury defined by electrolyte criteria from the National Cancer Institute Common Terminology Criteria for Adverse Events (grade 1 or higher). Assessments occurred at early (first or second cycle) and late (last or second to last cycle) cisplatin infusions. RESULTS A total of 159 children (mean [SD] age at early cisplatin infusion, 7.2 [5.3] years; 80 [50%] male) participated. The most common diagnoses were central nervous system tumors (58 [36%]), neuroblastoma (43 [27%]), and osteosarcoma (33 [21%]). Acute kidney injury (by serum creatinine level increase) occurred in 48 of 159 patients (30%) at early cisplatin infusions and 23 of 143 patients (16%) at late cisplatin infusions. Acute kidney injury (by electrolyte abnormalities) occurred in 106 of 159 patients (67%) at early cisplatin infusion and 100 of 143 patients (70%) at late cisplatin infusions. Neuroblastoma diagnosis and higher precisplatin GFR were independently associated with acute kidney injury (serum creatinine level increase) at early cisplatin infusions (adjusted odds ratio [aOR] for neuroblastoma vs other, 3.25; 95% CI, 1.18-8.95; aOR for GFR, 1.01; 95% CI, 1.00-1.03) and late cisplatin infusions (aOR for neuroblastoma vs other, 6.85; 95% CI, 1.23-38.0; aOR for GFR, 1.01; 95% CI, 1.00-1.03). Higher cisplatin infusion dose was also independently associated with acute kidney injury (serum creatinine level increase) at later cisplatin infusions (aOR, 1.05; 95% CI, 1.01-1.10). CONCLUSIONS AND RELEVANCE The findings suggest that acute kidney injury is common among children receiving cisplatin infusions and that rate and risk factors differ at earlier vs later infusions. These results may help with risk stratification with a goal of risk reduction.
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Affiliation(s)
- Kelly R. McMahon
- Research Institute of the McGill University Health Centre, Montreal Children’s Hospital, Division of Nephrology, Department of Pediatrics, McGill University Health Centre, Montreal, Quebec, Canada
- Division of Experimental Medicine, Faculty of Medicine, McGill University, Montreal, Quebec, Canada
| | - Shahrad Rod Rassekh
- British Columbia Children’s Hospital, Division of Hematology/Oncology/Bone Marrow Transplantation, Department of Pediatrics, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Kirk R. Schultz
- British Columbia Children’s Hospital, Division of Hematology/Oncology/Bone Marrow Transplantation, Department of Pediatrics, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Tom Blydt-Hansen
- British Columbia Children’s Hospital, Division of Pediatric Nephrology, Department of Pediatrics, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Geoffrey D. E. Cuvelier
- CancerCare Manitoba, Division of Pediatric Oncology-Hematology-BMT, Department of Pediatrics and Child Health, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Cherry Mammen
- British Columbia Children’s Hospital, Division of Pediatric Nephrology, Department of Pediatrics, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Maury Pinsk
- Section of Pediatric Nephrology, Department of Pediatrics and Child Health, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Bruce C. Carleton
- BC Children’s Hospital Research Institute, Department of Pediatrics, Division of Translational Therapeutics, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Ross T. Tsuyuki
- Epidemiology Coordinating and Research Centre, Department of Pharmacology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Colin J. D. Ross
- Faculty of Pharmaceutical Sciences, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Ana Palijan
- Research Institute of the McGill University Health Centre, Montreal Children’s Hospital, Division of Nephrology, Department of Pediatrics, McGill University Health Centre, Montreal, Quebec, Canada
| | - Louis Huynh
- Faculty of Health Sciences, Queen’s University, Kingston, Ontario, Canada
| | - Mariya Yordanova
- Research Institute of the McGill University Health Centre, Montreal Children’s Hospital, Division of Nephrology, Department of Pediatrics, McGill University Health Centre, Montreal, Quebec, Canada
| | - Frédérik Crépeau-Hubert
- Research Institute of the McGill University Health Centre, Montreal Children’s Hospital, Division of Nephrology, Department of Pediatrics, McGill University Health Centre, Montreal, Quebec, Canada
| | - Stella Wang
- Peter Gilgan Centre For Research and Learning, Toronto, Ontario, Canada
| | - Debbie Boyko
- Epidemiology Coordinating and Research Centre, Department of Pharmacology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Michael Zappitelli
- Peter Gilgan Centre For Research and Learning, Toronto, Ontario, Canada
- Department of Pediatrics, Division of Pediatric Nephrology, Montreal Children’s Hospital, McGill University Health Centre, Montreal, Quebec, Canada
- Now with Toronto Hospital for Sick Children, Department of Pediatrics, Division of Nephrology, University of Toronto, Toronto, Ontario, Canada
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8
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Johnston J, Pinsk M. Daily Evaluation Cards Are Superior for Student Assessment Compared to Single Rater In-Training Evaluations. Med Sci Educ 2020; 30:203-209. [PMID: 34457660 PMCID: PMC8368482 DOI: 10.1007/s40670-019-00855-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
INTRODUCTION The University of Manitoba's ambulatory pediatric clerkship transitioned to daily encounter cards (DECs) from single in-training evaluation reports (ITERs). The impact of this change on quality of student assessment was unknown. Using the validated Completed Clinical Evaluation Report Rating (CCERR) scale, we compared the assessment quality of the single ITER to the DEC-based system. METHODS Block randomization was used to select from a cohort of ITER- and DEC-based assessments during equivalent points in clerkship training. Data were transcribed and anonymized and scored by two blinded raters using the CCERR. RESULTS Inter-rater reliability for total CCERR scores was substantive (> 0.6). Mean total CCERR score for the DEC cohort was significantly higher than for the ITER cohort (25.2 vs. 16.8, p < 0.001), as were the mean scores for each item (2.81 vs. 1.86, p < 0.05). Multivariate logistical regression supported the significant influence of assessment method on assessment quality. CONCLUSIONS There is improvement in the average quality of student assessments associated with the transition from an ITER-based system to a DEC-based system. However, the improvement to only average CCERR scores for the DEC cohort suggests an unmet need for faculty development.
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Affiliation(s)
- James Johnston
- Department of Pediatrics & Child Health, Max Rady College of Medicine, University of Manitoba, FE009-840 Sherbrook St, Winnipeg, MB R3A 1S1 Canada
| | - Maury Pinsk
- Department of Pediatrics & Child Health, Max Rady College of Medicine, University of Manitoba, FE009-840 Sherbrook St, Winnipeg, MB R3A 1S1 Canada
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9
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Hepburn CM, Gilpin A, Autmizguine J, Denburg A, Dupuis LL, Finkelstein Y, Gruenwoldt E, Ito S, Jong G, Lacaze-Masmonteil T, Levy D, Macleod S, Miller SP, Offringa M, Pinsk M, Power B, Rieder M, Litalien C. L’amélioration des médicaments à usage pédiatrique : une prescription pour les enfants et les adolescents canadiens. Paediatr Child Health 2019. [DOI: 10.1093/pch/pxz094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | - Andrea Gilpin
- Le Centre de formulations pédiatriques de la famille Rosalind et Morris Goodman du Centre hospitalier universitaire Sainte-Justine, Montréal (Québec)
| | - Julie Autmizguine
- Le Centre de formulations pédiatriques de la famille Rosalind et Morris Goodman du Centre hospitalier universitaire Sainte-Justine, Montréal (Québec)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Catherine Litalien
- Le Centre de formulations pédiatriques de la famille Rosalind et Morris Goodman du Centre hospitalier universitaire Sainte-Justine, Montréal (Québec)
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10
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Hepburn CM, Gilpin A, Autmizguine J, Denburg A, Dupuis LL, Finkelstein Y, Gruenwoldt E, Ito S, Jong G', Lacaze-Masmonteil T, Levy D, Macleod S, P Miller S, Offringa M, Pinsk M, Power B, Rieder M, Litalien C. Improving paediatric medications: A prescription for Canadian children and youth. Paediatr Child Health 2019; 24:333-339. [PMID: 31379437 DOI: 10.1093/pch/pxz079] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 04/18/2019] [Indexed: 12/24/2022] Open
Affiliation(s)
| | - Andrea Gilpin
- The Rosalind and Morris Goodman Family Pediatric Formulations Centre of the Centre Hospitalier Universitaire Ste-Justine, Montreal, Quebec
| | - Julie Autmizguine
- The Rosalind and Morris Goodman Family Pediatric Formulations Centre of the Centre Hospitalier Universitaire Ste-Justine, Montreal, Quebec
| | - Avram Denburg
- Canadian Paediatric Society, Ottawa, Ontario.,The Rosalind and Morris Goodman Family Pediatric Formulations Centre of the Centre Hospitalier Universitaire Ste-Justine, Montreal, Quebec
| | - L Lee Dupuis
- Canadian Paediatric Society, Ottawa, Ontario.,The Rosalind and Morris Goodman Family Pediatric Formulations Centre of the Centre Hospitalier Universitaire Ste-Justine, Montreal, Quebec
| | - Yaron Finkelstein
- Canadian Paediatric Society, Ottawa, Ontario.,The Rosalind and Morris Goodman Family Pediatric Formulations Centre of the Centre Hospitalier Universitaire Ste-Justine, Montreal, Quebec
| | - Emily Gruenwoldt
- Canadian Paediatric Society, Ottawa, Ontario.,The Rosalind and Morris Goodman Family Pediatric Formulations Centre of the Centre Hospitalier Universitaire Ste-Justine, Montreal, Quebec
| | - Shinya Ito
- Canadian Paediatric Society, Ottawa, Ontario.,The Rosalind and Morris Goodman Family Pediatric Formulations Centre of the Centre Hospitalier Universitaire Ste-Justine, Montreal, Quebec
| | - Geert 't Jong
- Canadian Paediatric Society, Ottawa, Ontario.,The Rosalind and Morris Goodman Family Pediatric Formulations Centre of the Centre Hospitalier Universitaire Ste-Justine, Montreal, Quebec
| | - Thierry Lacaze-Masmonteil
- Canadian Paediatric Society, Ottawa, Ontario.,The Rosalind and Morris Goodman Family Pediatric Formulations Centre of the Centre Hospitalier Universitaire Ste-Justine, Montreal, Quebec
| | - Deborah Levy
- Canadian Paediatric Society, Ottawa, Ontario.,The Rosalind and Morris Goodman Family Pediatric Formulations Centre of the Centre Hospitalier Universitaire Ste-Justine, Montreal, Quebec
| | - Stuart Macleod
- Canadian Paediatric Society, Ottawa, Ontario.,The Rosalind and Morris Goodman Family Pediatric Formulations Centre of the Centre Hospitalier Universitaire Ste-Justine, Montreal, Quebec
| | - Steven P Miller
- Canadian Paediatric Society, Ottawa, Ontario.,The Rosalind and Morris Goodman Family Pediatric Formulations Centre of the Centre Hospitalier Universitaire Ste-Justine, Montreal, Quebec
| | - Martin Offringa
- Canadian Paediatric Society, Ottawa, Ontario.,The Rosalind and Morris Goodman Family Pediatric Formulations Centre of the Centre Hospitalier Universitaire Ste-Justine, Montreal, Quebec
| | - Maury Pinsk
- Canadian Paediatric Society, Ottawa, Ontario.,The Rosalind and Morris Goodman Family Pediatric Formulations Centre of the Centre Hospitalier Universitaire Ste-Justine, Montreal, Quebec
| | - Barry Power
- Canadian Paediatric Society, Ottawa, Ontario.,The Rosalind and Morris Goodman Family Pediatric Formulations Centre of the Centre Hospitalier Universitaire Ste-Justine, Montreal, Quebec
| | - Michael Rieder
- Canadian Paediatric Society, Ottawa, Ontario.,The Rosalind and Morris Goodman Family Pediatric Formulations Centre of the Centre Hospitalier Universitaire Ste-Justine, Montreal, Quebec
| | - Catherine Litalien
- The Rosalind and Morris Goodman Family Pediatric Formulations Centre of the Centre Hospitalier Universitaire Ste-Justine, Montreal, Quebec
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11
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Nicholas DB, Kaufman M, Pinsk M, Samuel S, Hamiwka L, Molzahn AE. Examining the Transition from Child to Adult Care in Chronic Kidney Disease: An Open Exploratory Approach. Nephrol Nurs J 2018; 45:553-559. [PMID: 30585710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
For youth with chronic kidney disease (CKD) and their families, shifting from pediatric to adult systems of renal care can be challenging. This study explored the transitional process experienced by youth with CKD and their families, including perceived facilitators and barriers to effective transition. Qualitative interviews were conducted with youth with CKD (n=28) and their parents (n=28). Ambiguity regarding healthcare provider roles within the adult system was frequently reported. Themes reflected parental challenge relinquishing care responsibility, synergistic and divergent expectations between youth and parents, tensions in youth self-care readiness, desired healthcare provider roles in transition preparedness, and system considerations in transition. A "learning stage" was recommended in which youth experienced the adult system while supported by known pediatric team members.
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Affiliation(s)
- David B Nicholas
- Professor, Faculty of Social Work, University of Calgary (Central and Northern Alberta Region), Edmonton, Canada
| | - Miriam Kaufman
- former Staff Physician and Division Head, Division of Adolescent Medicine, Department of Pediatrics, The Hospital for Sick Children and University of Toronto, Toronto, Canada
| | - Maury Pinsk
- Professor, Pediatrics and Child Health (Nephrology), and Director of Northern and Rural Pediatric Education, Winnipeg Children's Hospital, University of Manitoba, Winnipeg, Canada
| | - Susan Samuel
- Professor, Pediatrics and Child Health (Nephrology), and Director of Northern and Rural Pediatric Education, Winnipeg Children's Hospital, University of Manitoba, Winnipeg, Canada
| | - Lorraine Hamiwka
- Associate Professor, Department of Pediatrics, University of Calgary, and a Pediatric Nephrologist, Alberta Children's Hospital, Calgary, Canada
| | - Anita E Molzahn
- Professor, Faculty of Nursing, University of Alberta, Edmonton, Canada
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12
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Pinsk M, Karpinski J, Carlisle E. Introduction of Competence by Design to Canadian Nephrology Postgraduate Training. Can J Kidney Health Dis 2018; 5:2054358118786972. [PMID: 30034814 PMCID: PMC6050612 DOI: 10.1177/2054358118786972] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2018] [Accepted: 01/10/2018] [Indexed: 11/20/2022] Open
Abstract
Purpose of the review: The Royal College of Physicians and Surgeons of Canada, with its Competence by Design initiative, is adopting the principles of competency-based medical education for residency training and continuing professional development. This initiative is being undertaken to meet the new standards of medical education in Canada, which include social accountability to meet performance-based outcomes of training. Nephrology is poised to implement Competence by Design into residency training in July 2018 and initiate a continuous quality improvement cycle to periodically renew and update the training requirements to be socially accountable and relevant in the modern age of medicine. The purpose of this review is to describe the process of entrustable professional activity and required training experience development and how they will affect subspecialty training in Canada. Sources of information: The construct of competency-based medical education was derived from existing literature searches of the medical education literature, including documentation provided by the Royal College of Physicians and Surgeons of Canada. The content for each entrustable professional activity and milestone was derived by consensus from the community expertise of the working group, existing speciality training requirements, and elements of training requirements that the Royal College has been mandated to superimpose on all training requirements to meet societal expectations. Methods: The Royal College Specialty Committee in Nephrology participated in 2 years of preparation for this implementation, which has included the creation of a new educational design for the discipline and the elucidation of entrustable professional activities to describe the scope of nephrology practice and to guide teaching, learning, and assessment in residency, and ultimately maintenance of competence in practice. Key findings: This article introduces the set of entrustable professional activities for adult and pediatric nephrology and describes the national consultation as part of an ongoing quality improvement of this work. Limitations: The implementation of Competence by Design will be tested by whether trainees embrace competency-based education by training to just entrustable professional activities, rather than the holistic model idealized in physician training. This is mitigated by the entrustable professional activity development incorporating multiple layers of competencies beyond a procedural skill. Time commitment for faculty will pose additional challenges in increasing the time for assessment of trainees, but is supported by electronic platforms at the Royal College to assist in data gathering and analysis. Implications: Competence by Design in nephrology is an outcomes-based curriculum and assessment platform that aims to train nephrologists to meet societal expectations in an ever-changing and complicated health care system. The goals are to increase safety and professional accountability to society and improve upon the already high standards of training within Canada.
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Affiliation(s)
- Maury Pinsk
- Department of Paediatrics and Child Health, University of Manitoba, Winnipeg, MB, Canada
| | - Jolanta Karpinski
- Royal College of Physicians and Surgeons of Canada, Ottawa, ON, Canada
| | - Euan Carlisle
- Department of Medicine, McMaster University, Hamilton, ON, Canada
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13
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Pinsk M, Nicholas D. Changing Needs for Information and Support in an Online System for Parents of Children With Kidney Disease. Can J Kidney Health Dis 2017; 4:2054358117714999. [PMID: 28717515 PMCID: PMC5502939 DOI: 10.1177/2054358117714999] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2016] [Accepted: 05/12/2017] [Indexed: 11/17/2022] Open
Abstract
Background: Pediatric chronic kidney disease is psychologically, financially, and physically demanding on parents providing care. Parents often feel isolated because of the rarity of the condition, and geographic isolation often compounds this perception in Canada. Many parents seek assistance online for both information and social support. Objective: This study examines an online portal, titled “Ability Online,” which was designed to provide support and information to a diverse group of parents using chat facilities, bulletin boards, and e-mail. Specifically, we sought to identify how the technologies offered in this system related to the support and information seeking needs for parents. Secondary aims of determining possible reasons for attrition over time were explored as well. Design: Mixed methodology sequential exploratory design using the qualitative methodology of descriptive interpretation. Setting: Telephone interviews. Patients: Twenty parents of pediatric patients with chronic kidney disease from four Canadian centers who engaged in an online social support system “Ability Online.” Measurements: Interview transcripts generated from 20 taped phone conversations were reviewed from parents who engaged in the online system, and the themes derived from these transcripts served to generate semistructured interview questions that focused on their use of, and perceived benefit from, this technology for social support. Follow-up telephone interviews were then conducted with a 6-person subset of the original group in an effort to further define the impact of technology on their experience. This same smaller cohort provided data on social supports, caregiver satisfaction, and caregiver stress. Results: Many parents experience a progression through which their needs for knowledge and support change over time. Specifically, parents describe a transition from pure information seeking, to seeking parental interaction, mutual support and collaboration, and ultimately to advocacy. Parents described how technology could be used to address those needs. Limitations: Our cohort was slightly more educated and representative of more urban populations than published data reflecting the population of North American pediatric patients living with kidney disease. Conclusions: Our data suggest themes of technology use influencing the goals of online support seeking. While our findings are preliminary, further study may inform Web designers to identify the changing needs of participants in designing such online support networks, and minimize the reasons that participants fail to adopt, or terminate their online experiences.
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Affiliation(s)
- Maury Pinsk
- Section of Pediatric Nephrology, University of Manitoba, Winnipeg, Canada
| | - David Nicholas
- Department of Social Work, University of Calgary, Alberta, Canada
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14
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Samuel SM, Flynn R, Zappitelli M, Dart A, Parekh R, Pinsk M, Mammen C, Wade A, Scott SD. Factors influencing practice variation in the management of nephrotic syndrome: a qualitative study of pediatric nephrology care providers. CMAJ Open 2017; 5:E424-E430. [PMID: 28592406 PMCID: PMC5498309 DOI: 10.9778/cmajo.20160078] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Treatment protocols for childhood nephrotic syndrome are highly variable between providers and care centres. We conducted a qualitative study to understand the complex multilevel processes that lead to practice variation and influence provider management of nephrotic syndrome. METHODS Focus groups with multidisciplinary pediatric nephrology care providers (n = 67) from 10 Canadian pediatric nephrology centres that had more than 1 pediatric nephrologist were conducted between September 2013 and April 2015. Focus group discussions were guided by the Ottawa Model for Research Use. We used a semistructured interview guide to elicit participants' perspectives regarding 1) the work setting and context of the clinical environment, 2) reasons for variation at the provider level and 3) clinical practice guidelines for nephrotic syndrome. Focus group discussions were transcribed and analyzed concurrently with the use of qualitative content analysis. RESULTS Emerging themes were grouped into 2 categories: centre-level factors and provider-level factors. At the centre level, the type of care model used, clinic structures and resources, and lack of communication and collaboration within and between Canadian centres influenced care variation. At the provider level, use of experiential knowledge versus empirical knowledge and interpretation of patient characteristics influenced provider management of nephrotic syndrome. INTERPRETATION Centre- and provider-level factors play an important role in shaping practice differences in the management of childhood nephrotic syndrome. Further research is needed to determine whether variation in care is associated with disparities in outcomes.
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Affiliation(s)
- Susan M Samuel
- Affiliations: Section of Nephrology (Samuel, Wade), Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, Alta.; Faculty of Nursing (Flynn), University of Alberta, Edmonton, Alta.; Division of Nephrology (Zappitelli), Department of Pediatrics, McGill University Health Centre, Montréal, Que.; Division of Nephrology (Dart, Pinsk), Department of Pediatrics, College of Medicine, University of Manitoba, Winnipeg, Man.; Division of Nephrology (Parekh), Department of Pediatrics, University of Toronto, Toronto, Ont.; Division of Nephrology (Mammen), Department of Pediatrics, Faculty of Medicine, University of British Columbia, Vancouver, BC; Faculty of Nursing (Scott), Edmonton Clinic Health Academy, University of Alberta, Edmonton, Alta
| | - Rachel Flynn
- Affiliations: Section of Nephrology (Samuel, Wade), Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, Alta.; Faculty of Nursing (Flynn), University of Alberta, Edmonton, Alta.; Division of Nephrology (Zappitelli), Department of Pediatrics, McGill University Health Centre, Montréal, Que.; Division of Nephrology (Dart, Pinsk), Department of Pediatrics, College of Medicine, University of Manitoba, Winnipeg, Man.; Division of Nephrology (Parekh), Department of Pediatrics, University of Toronto, Toronto, Ont.; Division of Nephrology (Mammen), Department of Pediatrics, Faculty of Medicine, University of British Columbia, Vancouver, BC; Faculty of Nursing (Scott), Edmonton Clinic Health Academy, University of Alberta, Edmonton, Alta
| | - Michael Zappitelli
- Affiliations: Section of Nephrology (Samuel, Wade), Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, Alta.; Faculty of Nursing (Flynn), University of Alberta, Edmonton, Alta.; Division of Nephrology (Zappitelli), Department of Pediatrics, McGill University Health Centre, Montréal, Que.; Division of Nephrology (Dart, Pinsk), Department of Pediatrics, College of Medicine, University of Manitoba, Winnipeg, Man.; Division of Nephrology (Parekh), Department of Pediatrics, University of Toronto, Toronto, Ont.; Division of Nephrology (Mammen), Department of Pediatrics, Faculty of Medicine, University of British Columbia, Vancouver, BC; Faculty of Nursing (Scott), Edmonton Clinic Health Academy, University of Alberta, Edmonton, Alta
| | - Allison Dart
- Affiliations: Section of Nephrology (Samuel, Wade), Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, Alta.; Faculty of Nursing (Flynn), University of Alberta, Edmonton, Alta.; Division of Nephrology (Zappitelli), Department of Pediatrics, McGill University Health Centre, Montréal, Que.; Division of Nephrology (Dart, Pinsk), Department of Pediatrics, College of Medicine, University of Manitoba, Winnipeg, Man.; Division of Nephrology (Parekh), Department of Pediatrics, University of Toronto, Toronto, Ont.; Division of Nephrology (Mammen), Department of Pediatrics, Faculty of Medicine, University of British Columbia, Vancouver, BC; Faculty of Nursing (Scott), Edmonton Clinic Health Academy, University of Alberta, Edmonton, Alta
| | - Rulan Parekh
- Affiliations: Section of Nephrology (Samuel, Wade), Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, Alta.; Faculty of Nursing (Flynn), University of Alberta, Edmonton, Alta.; Division of Nephrology (Zappitelli), Department of Pediatrics, McGill University Health Centre, Montréal, Que.; Division of Nephrology (Dart, Pinsk), Department of Pediatrics, College of Medicine, University of Manitoba, Winnipeg, Man.; Division of Nephrology (Parekh), Department of Pediatrics, University of Toronto, Toronto, Ont.; Division of Nephrology (Mammen), Department of Pediatrics, Faculty of Medicine, University of British Columbia, Vancouver, BC; Faculty of Nursing (Scott), Edmonton Clinic Health Academy, University of Alberta, Edmonton, Alta
| | - Maury Pinsk
- Affiliations: Section of Nephrology (Samuel, Wade), Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, Alta.; Faculty of Nursing (Flynn), University of Alberta, Edmonton, Alta.; Division of Nephrology (Zappitelli), Department of Pediatrics, McGill University Health Centre, Montréal, Que.; Division of Nephrology (Dart, Pinsk), Department of Pediatrics, College of Medicine, University of Manitoba, Winnipeg, Man.; Division of Nephrology (Parekh), Department of Pediatrics, University of Toronto, Toronto, Ont.; Division of Nephrology (Mammen), Department of Pediatrics, Faculty of Medicine, University of British Columbia, Vancouver, BC; Faculty of Nursing (Scott), Edmonton Clinic Health Academy, University of Alberta, Edmonton, Alta
| | - Cherry Mammen
- Affiliations: Section of Nephrology (Samuel, Wade), Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, Alta.; Faculty of Nursing (Flynn), University of Alberta, Edmonton, Alta.; Division of Nephrology (Zappitelli), Department of Pediatrics, McGill University Health Centre, Montréal, Que.; Division of Nephrology (Dart, Pinsk), Department of Pediatrics, College of Medicine, University of Manitoba, Winnipeg, Man.; Division of Nephrology (Parekh), Department of Pediatrics, University of Toronto, Toronto, Ont.; Division of Nephrology (Mammen), Department of Pediatrics, Faculty of Medicine, University of British Columbia, Vancouver, BC; Faculty of Nursing (Scott), Edmonton Clinic Health Academy, University of Alberta, Edmonton, Alta
| | - Andrew Wade
- Affiliations: Section of Nephrology (Samuel, Wade), Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, Alta.; Faculty of Nursing (Flynn), University of Alberta, Edmonton, Alta.; Division of Nephrology (Zappitelli), Department of Pediatrics, McGill University Health Centre, Montréal, Que.; Division of Nephrology (Dart, Pinsk), Department of Pediatrics, College of Medicine, University of Manitoba, Winnipeg, Man.; Division of Nephrology (Parekh), Department of Pediatrics, University of Toronto, Toronto, Ont.; Division of Nephrology (Mammen), Department of Pediatrics, Faculty of Medicine, University of British Columbia, Vancouver, BC; Faculty of Nursing (Scott), Edmonton Clinic Health Academy, University of Alberta, Edmonton, Alta
| | - Shannon D Scott
- Affiliations: Section of Nephrology (Samuel, Wade), Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, Alta.; Faculty of Nursing (Flynn), University of Alberta, Edmonton, Alta.; Division of Nephrology (Zappitelli), Department of Pediatrics, McGill University Health Centre, Montréal, Que.; Division of Nephrology (Dart, Pinsk), Department of Pediatrics, College of Medicine, University of Manitoba, Winnipeg, Man.; Division of Nephrology (Parekh), Department of Pediatrics, University of Toronto, Toronto, Ont.; Division of Nephrology (Mammen), Department of Pediatrics, Faculty of Medicine, University of British Columbia, Vancouver, BC; Faculty of Nursing (Scott), Edmonton Clinic Health Academy, University of Alberta, Edmonton, Alta
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Ure ME, Heydari E, Pan W, Ramesh A, Rehman S, Morgan C, Pinsk M, Erickson R, Herrmann JM, Dimke H, Cordat E, Lemaire M, Walter M, Alexander RT. A variant in a cis-regulatory element enhances claudin-14 expression and is associated with pediatric-onset hypercalciuria and kidney stones. Hum Mutat 2017; 38:649-657. [PMID: 28229505 DOI: 10.1002/humu.23202] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 01/26/2017] [Accepted: 02/18/2017] [Indexed: 12/19/2022]
Abstract
The greatest risk factor for kidney stones is hypercalciuria, the etiology of which is largely unknown. A recent genome-wide association study (GWAS) linked hypercalciuria and kidney stones to a claudin-14 (CLDN14) risk haplotype. However, the underlying molecular mechanism was not delineated. Recently, renal CLDN14 expression was found to increase in response to increased plasma calcium, thereby inducing calciuria. We hypothesized therefore that some children with hypercalciuria and kidney stones harbor a CLDN14 variant that inappropriately increases gene expression. To test this hypothesis, we sequenced the CLDN14 risk haplotype in a cohort of children with idiopathic hypercalciuria and kidney stones. An intronic SNP was more frequent in affected children. Dual luciferase and cell-based assays demonstrated increased reporter or CLDN14 expression when this polymorphism was introduced. In silico studies predicted the SNP introduced a novel insulinoma-associated 1 (INSM1) transcription factor binding site. Consistent with this, repeating the dual luciferase assay in the presence of INSM1 further increased reporter expression. Our data suggest that children with the INSM1 binding site within the CLDN14 risk haplotype have a higher likelihood of hypercalciuria and kidney stones. Enhanced CLDN14 expression may play a role in the pathophysiology of their hypercalciuria.
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Affiliation(s)
- Megan E Ure
- Department of Pediatrics, The University of Alberta, Edmonton, Alberta, T6G 2R7, Canada
| | - Emma Heydari
- Department of Pediatrics, The University of Alberta, Edmonton, Alberta, T6G 2R7, Canada
| | - Wanling Pan
- Department of Physiology, The University of Alberta, Edmonton, Alberta, T6G 2R7, Canada
| | - Ajay Ramesh
- Depratment of Cell Biology, University of Kaiserslautern, Kaiserslautern, 67663, Germany
| | - Sabah Rehman
- Department of Pediatrics, The University of Alberta, Edmonton, Alberta, T6G 2R7, Canada
| | - Catherine Morgan
- Department of Pediatrics, The University of Alberta, Edmonton, Alberta, T6G 2R7, Canada
| | - Maury Pinsk
- Department of Pediatrics, The University of Alberta, Edmonton, Alberta, T6G 2R7, Canada
| | - Robin Erickson
- Department of Pediatrics, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 0W8, Canada
| | - Johannes M Herrmann
- Depratment of Cell Biology, University of Kaiserslautern, Kaiserslautern, 67663, Germany
| | - Henrik Dimke
- Department of Cardiovascular and Renal Research, University of Southern Denmark, Odense, 5000, Denmark
| | - Emmanuelle Cordat
- Department of Pediatrics, The University of Alberta, Edmonton, Alberta, T6G 2R7, Canada
| | - Mathieu Lemaire
- The Hospital for Sick Children, Toronto, Ontario, M5G 1×8, Canada
| | - Michael Walter
- Department of Medical Genetics, The University of Alberta, Edmonton, Alberta, T6G 2R7, Canada
| | - R Todd Alexander
- Department of Pediatrics, The University of Alberta, Edmonton, Alberta, T6G 2R7, Canada.,Department of Physiology, The University of Alberta, Edmonton, Alberta, T6G 2R7, Canada
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McMahon KR, Rod Rassekh S, Schultz KR, Pinsk M, Blydt-Hansen T, Mammen C, Tsuyuki RT, Devarajan P, Cuvelier GDE, Mitchell LG, Baruchel S, Palijan A, Carleton BC, Ross CJD, Zappitelli M. Design and Methods of the Pan-Canadian Applying Biomarkers to Minimize Long-Term Effects of Childhood/Adolescent Cancer Treatment (ABLE) Nephrotoxicity Study: A Prospective Observational Cohort Study. Can J Kidney Health Dis 2017; 4:2054358117690338. [PMID: 28270931 PMCID: PMC5317038 DOI: 10.1177/2054358117690338] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Accepted: 10/14/2016] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Childhood cancer survivors experience adverse drug events leading to lifelong health issues. The Applying Biomarkers to Minimize Long-Term Effects of Childhood/Adolescent Cancer Treatment (ABLE) team was established to validate and apply biomarkers of cancer treatment effects, with a goal of identifying children at high risk of developing cancer treatment complications associated with thrombosis, graft-versus-host disease, hearing loss, and kidney damage. Cisplatin is a chemotherapy well known to cause acute and chronic nephrotoxicity. Data on biomarkers of acute kidney injury (AKI) and late renal outcomes in children treated with cisplatin are limited. OBJECTIVE To describe the design and methods of the pan-Canadian ABLE Nephrotoxicity study, which aims to evaluate urine biomarkers (neutrophil gelatinase-associated lipocalin [NGAL] and kidney injury molecule-1 [KIM-1]) for AKI diagnosis, and determine whether they predict risk of long-term renal outcomes (chronic kidney disease [CKD], hypertension). DESIGN This is a 3-year observational prospective cohort study. SETTING The study includes 12 Canadian pediatric oncology centers. PATIENTS The target recruitment goal is 150 patients aged less than 18 years receiving cisplatin. Exclusion criteria: Patients with an estimated glomerular filtration rate (eGFR) <30 mL/min/1.73 m2 or a pre-existing renal transplantation at baseline. MEASUREMENTS Serum creatinine (SCr), urine NGAL, and KIM-1 are measured during cisplatin infusion episodes (pre-infusion, immediate post-infusion, discharge sampling). At follow-up visits, eGFR, microalbuminuria, and blood pressure are measured and outcomes are collected. METHODS Outcomes: AKI is defined as per SCr criteria of the Kidney Disease: Improving Global Outcomes (KDIGO) guidelines. CKD is defined as eGFR <90 mL/min/1.73m2 or albumin-to-creatinine ratio≥3mg/mmol. Hypertension is defined as per guidelines. Procedure: Patients are recruited before their first or second cisplatin cycle. Participants are evaluated during 2 cisplatin infusion episodes (AKI biomarker validation) and at 3, 12, and 36 months post-cisplatin treatment (late outcomes). LIMITATIONS The study has a relatively moderate sample size and short follow-up duration. There is potential for variability in data collection since multiple sites are involved. CONCLUSIONS ABLE will provide a national platform to study biomarkers of late cancer treatment complications. The Nephrotoxicity study is a novel study of AKI biomarkers in children treated with cisplatin that will greatly inform on late cisplatin renal outcomes and follow-up needs.
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Affiliation(s)
- Kelly R. McMahon
- Department of Pediatrics, Division of Pediatric Nephrology, Montreal Children’s Hospital, McGill University Health Centre, Montreal, Canada
| | - Shahrad Rod Rassekh
- Department of Pediatrics, Division of Hematology/Oncology/Bone Marrow Transplantation, British Columbia Children’s Hospital, University of British Columbia, Vancouver, Canada
| | - Kirk R. Schultz
- Department of Pediatrics, Division of Hematology/Oncology/Bone Marrow Transplantation, British Columbia Children’s Hospital, University of British Columbia, Vancouver, Canada
| | - Maury Pinsk
- Department of Pediatrics and Child Health, CancerCare Manitoba, University of Manitoba, Winnipeg, Canada
| | - Tom Blydt-Hansen
- Department of Pediatrics, Division of Pediatric Nephrology, British Columbia Children’s Hospital, University of British Columbia, Vancouver, Canada
| | - Cherry Mammen
- Department of Pediatrics, Division of Pediatric Nephrology, British Columbia Children’s Hospital, University of British Columbia, Vancouver, Canada
| | - Ross T. Tsuyuki
- Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Canada
| | - Prasad Devarajan
- Division of Nephrology & Hypertension, Cincinnati Children’s Hospital Medical Center, OH, USA
| | - Geoff D. E. Cuvelier
- Department of Pediatrics and Child Health, CancerCare Manitoba, University of Manitoba, Winnipeg, Canada
| | - Lesley G. Mitchell
- Department of Pediatrics, Division of Hematology/Oncology, Stollery Children’s Hospital, University of Alberta, Edmonton, Canada
| | - Sylvain Baruchel
- Department of Pediatrics, Division of Hematology/Oncology, Hospital for Sick Children, Toronto, Canada
| | - Ana Palijan
- Department of Pediatrics, Division of Pediatric Nephrology, Montreal Children’s Hospital, McGill University Health Centre, Montreal, Canada
| | - Bruce C. Carleton
- Child and Family Research Institute, University of British Columbia, Vancouver, Canada
| | - Colin J. D. Ross
- Child and Family Research Institute, University of British Columbia, Vancouver, Canada
| | - Michael Zappitelli
- Department of Pediatrics, Division of Pediatric Nephrology, Montreal Children’s Hospital, McGill University Health Centre, Montreal, Canada
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17
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Samuel S, Scott S, Morgan C, Dart A, Mammen C, Parekh R, Nettel-Aguirre A, Eddy A, Flynn R, Pinsk M, Wade A, Arora S, Benoit G, Bitzan M, Erickson R, Feber J, Filler G, Geier P, Girardin C, Grisaru S, Tee J, Kemp K, Zappitelli M. The Canadian Childhood Nephrotic Syndrome (CHILDNEPH) Project: overview of design and methods. Can J Kidney Health Dis 2014; 1:17. [PMID: 25960884 PMCID: PMC4424503 DOI: 10.1186/2054-3581-1-17] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Accepted: 06/27/2014] [Indexed: 11/30/2022] Open
Abstract
Background Nephrotic syndrome is a commonly acquired kidney disease in children that causes significant morbidity due to recurrent episodes of heavy proteinuria. The management of childhood nephrotic syndrome is known to be highly variable among physicians and care centres. Objectives The primary objective of the study is to determine centre-, physician-, and patient-level characteristics associated with steroid exposure and length of steroid treatment. We will also determine the association of dose and duration of steroid treatment and time to first relapse as a secondary aim. An embedded qualitative study utilizing focus groups with health care providers will enrich the quantitative results by providing an understanding of the attitudes, beliefs and local contextual factors driving variation in care. Design Mixed-methods study; prospective observational cohort (quantitative component), with additional semi-structured focus groups of healthcare professionals (qualitative component). Setting National study, comprised of all 13 Canadian pediatric nephrology clinics. Patients 400 patients under 18 years of age to be recruited over 2.5 years. Measurements Steroid doses for all episodes (first presentation, first and subsequent relapses) tracked over course of the study. Physician and centre-level characteristics catalogued, with reasons for treatment preferences documented during focus groups. Methods All patients tracked prospectively over the course of the study, with data comprising a prospective registry. One focus group at each site to enrich understanding of variation in care. Limitations Contamination of treatment protocols between physicians may occur as a result of concurrent focus groups. Conclusions Quantitative and qualitative results will be integrated at end of study and will collectively inform strategies for the development and implementation of standardized evidence-based protocols across centres.
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Affiliation(s)
- Susan Samuel
- University of Calgary, Alberta Children's Hospital, 2888 Shaganappi Trail NW, Calgary, T3B 6A8 AB Canada
| | | | | | | | - Cherry Mammen
- University of British Columbia, Vancouver, BC Canada
| | | | - Alberto Nettel-Aguirre
- University of Calgary, Alberta Children's Hospital, 2888 Shaganappi Trail NW, Calgary, T3B 6A8 AB Canada
| | - Allison Eddy
- University of British Columbia, Vancouver, BC Canada
| | | | | | - Andrew Wade
- University of Calgary, Alberta Children's Hospital, 2888 Shaganappi Trail NW, Calgary, T3B 6A8 AB Canada
| | | | - Geneviève Benoit
- Centre Hospitalier Universitaire de Sainte-Justine, Université de Montréal, Montreal, QC Canada
| | | | | | | | - Guido Filler
- University of Western Ontario, London, ON Canada
| | | | - Colette Girardin
- Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC Canada
| | - Silviu Grisaru
- University of Calgary, Alberta Children's Hospital, 2888 Shaganappi Trail NW, Calgary, T3B 6A8 AB Canada
| | - James Tee
- Dalhousie University, Halifax, NS Canada
| | - Kyle Kemp
- University of Calgary, Alberta Children's Hospital, 2888 Shaganappi Trail NW, Calgary, T3B 6A8 AB Canada
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Cybulsky AV, Walsh M, Knoll G, Hladunewich M, Bargman J, Reich H, Humar A, Samuel S, Bitzan M, Zappitelli M, Dart A, Mammen C, Pinsk M, Muirhead N. Canadian Society of Nephrology Commentary on the 2012 KDIGO Clinical Practice Guideline for Glomerulonephritis: Management of Glomerulonephritis in Adults. Am J Kidney Dis 2014; 63:363-77. [DOI: 10.1053/j.ajkd.2013.12.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Accepted: 12/03/2013] [Indexed: 01/14/2023]
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19
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Samuel S, Bitzan M, Zappitelli M, Dart A, Mammen C, Pinsk M, Cybulsky AV, Walsh M, Knoll G, Hladunewich M, Bargman J, Reich H, Humar A, Muirhead N. Canadian Society of Nephrology Commentary on the 2012 KDIGO Clinical Practice Guideline for Glomerulonephritis: Management of Nephrotic Syndrome in Children. Am J Kidney Dis 2014; 63:354-62. [DOI: 10.1053/j.ajkd.2013.12.002] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Accepted: 12/03/2013] [Indexed: 11/11/2022]
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20
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Phan V, Blydt-Hansen T, Feber J, Alos N, Arora S, Atkinson S, Bell L, Clarson C, Couch R, Cummings EA, Filler G, Grant RM, Grimmer J, Hebert D, Lentle B, Ma J, Matzinger M, Midgley J, Pinsk M, Rodd C, Shenouda N, Stein R, Stephure D, Taback S, Williams K, Rauch F, Siminoski K, Ward LM. Skeletal findings in the first 12 months following initiation of glucocorticoid therapy for pediatric nephrotic syndrome. Osteoporos Int 2014; 25:627-37. [PMID: 23948876 PMCID: PMC4100956 DOI: 10.1007/s00198-013-2466-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Accepted: 07/16/2013] [Indexed: 02/08/2023]
Abstract
UNLABELLED Incident vertebral fractures and lumbar spine bone mineral density (BMD) were assessed in the 12 months following glucocorticoid initiation in 65 children with nephrotic syndrome. The incidence of vertebral fractures was low at 12 months (6 %) and most patients demonstrated recovery in BMD Z-scores by this time point. INTRODUCTION Vertebral fracture (VF) incidence following glucocorticoid (GC) initiation has not been previously reported in pediatric nephrotic syndrome. METHODS VF was assessed on radiographs (Genant method); lumbar spine bone mineral density (LS BMD) was evaluated by dual-energy X-ray absorptiometry. RESULTS Sixty-five children were followed to 12 months post-GC initiation (median age, 5.4 years; range, 2.3-17.9). Three of 54 children with radiographs (6 %; 95 % confidence interval (CI), 2-15 %) had incident VF at 1 year. The mean LS BMD Z-score was below the healthy average at baseline (mean ± standard deviation (SD), -0.5 ± 1.1; p = 0.001) and at 3 months (-0.6 ± 1.1; p < 0.001), but not at 6 months (-0.3 ± 1.3; p = 0.066) or 12 months (-0.3 ± 1.2; p = 0.066). Mixed effect modeling showed a significant increase in LS BMD Z-scores between 3 and 12 months (0.22 SD; 95 % CI, 0.08 to 0.36; p = 0.003). A subgroup (N = 16; 25 %) had LS BMD Z-scores that were ≤-1.0 at 12 months. In these children, each additional 1,000 mg/m(2) of GC received in the first 3 months was associated with a decrease in LS BMD Z-score by 0.39 at 12 months (95 % CI, -0.71 to -0.07; p = 0.017). CONCLUSIONS The incidence of VF at 1 year was low and LS BMD Z-scores improved by 12 months in the majority. Twenty-five percent of children had LS BMD Z-scores ≤-1.0 at 12 months. In these children, LS BMD Z-scores were inversely associated with early GC exposure, despite similar GC exposure compared to the rest of the cohort.
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Affiliation(s)
- V Phan
- Université de Montréal, Montréal, QC, Canada
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21
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Siminoski K, Lee KC, Abish S, Alos N, Bell L, Blydt-Hansen T, Couch R, Cummings EA, Ellsworth J, Feber J, Fernandez CV, Halton J, Huber AM, Israels S, Jurencak R, Lang B, Laverdière C, LeBlanc C, Lewis V, Midgley J, Miettunen PM, Oen K, Phan V, Pinsk M, Rauch F, Rodd C, Roth J, Saint-Cyr C, Scuccimarri R, Stephure D, Taback S, Wilson B, Ward LM. The development of bone mineral lateralization in the arms. Osteoporos Int 2013; 24:999-1006. [PMID: 22744715 PMCID: PMC4105250 DOI: 10.1007/s00198-012-2054-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2012] [Accepted: 05/08/2012] [Indexed: 01/04/2023]
Abstract
UNLABELLED Bone mineral content (BMC) is known to be greater in the dominant arm after the age of 8 years. We studied a group of children and found that BMC sidedness gradually increased up to the age of 6 years and then remained stable into late adolescence. INTRODUCTION Bone mineral content (BMC) exhibits sidedness in the arms after the age of 8 years, but it is not known whether BMC is greater in the dominant arm from birth or whether lateralization develops in early childhood. To address this, we examined bone mineral status in relation to handedness and age. METHODS Subjects (N = 158) were children recently initiating glucocorticoids for underlying disease (leukemia 43 %, rheumatic conditions 39 %, nephrotic syndrome 18 %). Handedness was determined by questionnaire and BMC by dual-energy X-ray absorptiometry. RESULTS Median age was 7.2 years (range, 1.5 to 17.0 years), 49 % was male, and the spine BMD Z-score was -0.9 (SD, 1.3). By linear regression, BMC sidedness in the arms was significantly related to age (r = 0.294, p = 0.0005). Breakpoint analysis revealed two lines with a knot at 6.0 years (95 % CI, 4.5-7.5 years). The formula for the first line was: dominant:nondominant arm BMC ratio = 0.029 × age [in years] + 0.850 (r = 0.323, p = 0.017). The slope of the second line was not different from 0 (p = 0.332), while the slopes for the two lines were significantly different (p = 0.027). CONCLUSIONS These results show that arm BMC sidedness in this patient group develops up to age 6 years and then remains stable into late adolescence. This temporal profile is consistent with mechanical stimulation of the skeleton in response to asymmetrical muscle use as handedness becomes manifest.
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Affiliation(s)
- K Siminoski
- University of Alberta, 6628-123 Street, Edmonton, Alberta, Canada T6H 3T6.
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22
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Handrigan GR, Chitayat D, Lionel AC, Pinsk M, Vaags AK, Marshall CR, Dyack S, Escobar LF, Fernandez BA, Stegman JC, Rosenfeld JA, Shaffer LG, Goodenberger M, Hodge JC, Cain JE, Babul-Hirji R, Stavropoulos DJ, Yiu V, Scherer SW, Rosenblum ND. Deletions in 16q24.2 are associated with autism spectrum disorder, intellectual disability and congenital renal malformation. J Med Genet 2013; 50:163-73. [DOI: 10.1136/jmedgenet-2012-101288] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Ferris M, Norwood V, Radeva M, Gassman JJ, Al-Uzri A, Askenazi D, Matoo T, Pinsk M, Sharma A, Smoyer W, Stults J, Vyas S, Weiss R, Gipson D, Kaskel F, Friedman A, Moxey-Mims M, Trachtman H. Patient recruitment into a multicenter randomized clinical trial for kidney disease: report of the focal segmental glomerulosclerosis clinical trial (FSGS CT). Clin Transl Sci 2012; 6:13-20. [PMID: 23399084 DOI: 10.1111/cts.12003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
We describe the experience of the focal segmental glomerulosclerosis clinical trial (FSGS CT) in the identification and recruitment of participants into the study. This National Institutes of Health funded study, a multicenter, open-label, randomized comparison of cyclosporine versus oral dexamethasone pulses plus mycophenolate mofetil, experienced difficulty and delays meeting enrollment goals. These problems occurred despite the support of patient advocacy groups and aggressive recruitment strategies. Multiple barriers were identified including: (1) inaccurate estimates of the number of potential incident FSGS patients at participating centers; (2) delays in securing one of the test agents; (3) prolonged time between IRB approval and execution of a subcontract (mean 7.5 ± 0.8 months); (4) prolonged time between IRB approval and enrollment of the first patient at participating sites (mean 19.6 ± 1.4 months); and (5) reorganization of clinical coordinating core infrastructure to align resources with enrollment. A Web-based anonymous survey of site investigators revealed site-related barriers to patient recruitment. The value of a variety of recruitment tools was of marginal utility in facilitating patient enrollment. We conclude that improvements in the logistics of study approval and regulatory start-up and testing of promising novel agents are important factors in promoting enrollment into randomized clinical trials in nephrology.
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Affiliation(s)
- Maria Ferris
- University of North Carolina, Chapel Hill, NC, USA
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Fiedrich E, Sabhaney V, Lui J, Pinsk M. Assessment of Ondansetron-Associated Hypokalemia in Pediatric Oncology Patients. ISRN Oncology 2012; 2012:798239. [PMID: 23050164 PMCID: PMC3459247 DOI: 10.5402/2012/798239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Accepted: 08/14/2012] [Indexed: 11/23/2022]
Abstract
Objectives. Ondansetron is a 5-hydroxytryptamine (5-HT3, serotonin) receptor antagonist used as antiemetic prophylaxis preceding chemotherapy administration. Hypokalemia is a rare complication of ondansetron, which may be underreported due to confounding emesis and chemotherapy-induced tubulopathy. We performed a prospective cohort study to determine if ondansetron caused significant hypokalemia independently as a result of renal potassium wasting. Methods. Twelve patients were recruited, with ten completing the study. Blood and urine samples were collected before and after ondansetron administration in patients admitted for intravenous (IV) hydration and chemotherapy. Dietary histories and IV records were analyzed to calculate sodium and potassium balances. Results. We observed an expected drop in urine osmolality, an increase in urine sodium, but no statistically significant change in sodium or potassium balance before and after ondansetron. Conclusion. Ondansetron does not cause significant potassium wasting in appropriately hydrated and nutritionally replete patients. Careful monitoring of serum potassium is recommended in patients with chronic nutritional or volume status deficiencies receiving this medication.
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Affiliation(s)
- Elsa Fiedrich
- Division of Pediatric Nephrology, University of Alberta, 11405-87 Avenue, Edmonton, AB, Canada T6G 1C9
| | - Vikram Sabhaney
- Division of Pediatric Nephrology, University of Alberta, 11405-87 Avenue, Edmonton, AB, Canada T6G 1C9
| | - Justin Lui
- Division of Pediatric Nephrology, University of Alberta, 11405-87 Avenue, Edmonton, AB, Canada T6G 1C9
| | - Maury Pinsk
- Division of Pediatric Nephrology, University of Alberta, 11405-87 Avenue, Edmonton, AB, Canada T6G 1C9
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25
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Feber J, Gaboury I, Ni A, Alos N, Arora S, Bell L, Blydt-Hansen T, Clarson C, Filler G, Hay J, Hebert D, Lentle B, Matzinger M, Midgley J, Moher D, Pinsk M, Rauch F, Rodd C, Shenouda N, Siminoski K, Ward LM. Skeletal findings in children recently initiating glucocorticoids for the treatment of nephrotic syndrome. Osteoporos Int 2012; 23:751-60. [PMID: 21494860 PMCID: PMC4000256 DOI: 10.1007/s00198-011-1621-2] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2010] [Accepted: 03/02/2011] [Indexed: 01/27/2023]
Abstract
SUMMARY Eighty children with nephrotic syndrome underwent lumbar spine densitometry and vertebral morphometry soon after glucocorticoid initiation. We found an inverse relationship between glucocorticoid exposure and spine areal bone mineral density (BMD) Z-score and a low rate of vertebral deformities (8%). INTRODUCTION Vertebral fractures are an under-recognized complication of childhood glucocorticoid-treated illnesses. Our goal was to study the relationships among glucocorticoid exposure, lumbar spine areal BMD (LS BMD), and vertebral shape in glucocorticoid-treated children with new-onset nephrotic syndrome. METHODS Lateral thoracolumbar spine radiography and LS BMD were performed in 80 children with nephrotic syndrome (median age 4.4 years; 46 boys) within the first 37 days of glucocorticoid therapy. Genant semiquantitative grading was used as the primary method for vertebral morphometry; the algorithm-based qualitative (ABQ) method was used for secondary vertebral deformity analysis. RESULTS Six of the 78 children with usable radiographs (8%; 95% confidence interval 4 to 16%) manifested a single Genant grade 1 deformity each. All deformities were mild anterior wedging (two at each of T6, T7, and T8). Four of the 78 children (5%; 95% confidence interval 2 to 13%) showed one ABQ sign of fracture each (loss of endplate parallelism; two children at T6 and two at T8). Two of the children with ABQ signs also had a Genant grade 1 deformity in the same vertebral body. None of the children with a Genant or ABQ deformity reported back pain. An inverse relationship was identified between LS BMD Z-score and glucocorticoid exposure. CONCLUSIONS Although we identified an inverse relationship between steroid exposure and LS BMD soon after glucocorticoid initiation for childhood nephrotic syndrome, there was only a low rate of vertebral deformities. The clinical significance of these findings requires further study.
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Affiliation(s)
- J Feber
- University of Ottawa, Ottawa, ON, Canada
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Trachtman H, Vento S, Gipson D, Wickman L, Gassman J, Joy M, Savin V, Somers M, Pinsk M, Greene T. Novel therapies for resistant focal segmental glomerulosclerosis (FONT) phase II clinical trial: study design. BMC Nephrol 2011; 12:8. [PMID: 21310077 PMCID: PMC3045306 DOI: 10.1186/1471-2369-12-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2011] [Accepted: 02/10/2011] [Indexed: 11/10/2022] Open
Abstract
Background The lack of adequate randomized clinical trials (RCT) has hindered identification of new therapies that are safe and effective for patients with primary focal segmental glomerulosclerosis (FSGS), especially in patients who fail to respond to corticosteroids and immunosuppressive therapies. Recent basic science advances have led to development of alternative treatments that specifically target aberrant pathways of fibrosis which are relevant to disease progression in FSGS. There is a need for a flexible Phase II study design which will test such novel antifibrotic strategies in order to identify agents suitable for phase III testing. Methods/Design The Novel Therapies for Resistant Focal Segmental Glomerulosclerosis (FONT) project is a multicenter Phase I/II RCT designed to investigate the potential efficacy of novel therapies for resistant FSGS. Adalimumab and galactose will be evaluated against conservative therapy consisting of the combination of lisinopril, losartan and atorvastatin. The sample size is defined to assure that if one of the treatments has a superior response rate compared to that of the other treatments, it will be selected with high probability for further evaluation. Comparison of primary and secondary endpoints in each study arm will enable a choice to be made of which treatments are worthy of further study in future Phase III RCT. Discussion This report highlights the key features of the FONT II RCT including the two-step outcome analysis that will expedite achievement of the study objectives. The proposed phase II study design will help to identify promising agents for further testing while excluding ineffective agents. This staged approach can help to prevent large expenditures on unworthy therapeutic agents in the management of serious but rare kidney diseases Trial Registration ClinicalTrials.gov, NCT00814255
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Affiliation(s)
- Howard Trachtman
- Cohen Children's Medical Center of New York, North Shore Long Island Jewish Health System, New Hyde Park, NY, USA.
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27
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Abstract
BACKGROUND Steroid-dependent, steroid-resistant or frequently relapsing nephrotic syndrome carries a poor prognosis, including progression to renal failure. There are a number of studies confirming the efficacy of FK506 in steroid-resistant or steroid-dependent nephrotic syndrome. Although the use of this medication is becoming more common, we know very little about the potential nephrotoxicity when used in nephrotic syndrome. METHOD We retrospectively reviewed the characteristics and biopsy findings of 11 children with steroid-dependent or frequently relapsing nephrotic syndrome treated with FK506. Two sequential biopsies were evaluated for the change in interstitial fibrosis, measured by a quantitative stereological method, and the change in arteriolar hyaline thickening, tubular atrophy and interstitial fibrosis, graded according to Banff criteria. RESULTS There was an increase in interstitial fibrosis (P = 0.005), with a median absolute change in the per cent volume density between initial and follow-up biopsies of 1.8% [interquartile range (IQR) 3.9%]. Median percentage change in volume density of interstitial fibrosis, relative to volume density of interstitial fibrosis prior to initiating FK506, was 93% (IQR 138%). Banff scores for interstitial fibrosis and tubular atrophy also increased following tacrolimus therapy (P = 0.04 for both). Average FK506 trough level over the treatment period was significantly associated with change in fibrosis (Spearman's rho = 0.67 and P = 0.02). CONCLUSIONS This is some of the first histological data concerning tacrolimus nephrotoxicity in childhood nephrotic syndrome. Although the role of the natural progression of the underlying disease in the observed change is not definitively clear, the changes seen are in keeping with the known nephrotoxic effects of FK506 demonstrated in renal transplant. This increase is small when presented as a median change. However, there were a number of children who had a larger change in fibrosis. The factors predictive of interstitial fibrosis while on FK506 are not well defined; the findings from this study suggest that FK506 level may be a factor. Given the observations and limitations of the few published studies, there is an obvious need for further study in a large multicenter prospective trial.
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Affiliation(s)
- Catherine Morgan
- Division of Pediatric Nephrology, Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada.
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28
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Konen C, Pinsk M, Arcaro M, Kastner S. Object representations in the dorsal pathway: fMRI adaptation effects in macaque posterior parietal cortex. J Vis 2010. [DOI: 10.1167/8.6.493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Hanafy S, Pinsk M, Jamali F. Effect of obesity on response to cardiovascular drugs in pediatric patients with renal disease. Pediatr Nephrol 2009; 24:815-21. [PMID: 19083022 DOI: 10.1007/s00467-008-1064-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2008] [Revised: 10/30/2008] [Accepted: 11/03/2008] [Indexed: 11/25/2022]
Abstract
Obesity is associated with an increased concentration of inflammatory mediators, which in turn, in adults, reduces the response to calcium channel blockers (CCBs). We reviewed the medical charts of 263 pediatric nephrology patients with renal conditions, with the aim of studying the effect of obesity on the response to L-type CCBs, angiotensin interrupting agents (ANGIs), or a combination of the two. Forty-eight patients were ultimately enrolled in the study: 25 obese and 23 non-obese patients. The effect of the treatments on lowering the blood pressure was compared in obese versus non-obese patients. The systolic response to CCBs, measured as at least a 10% reduction from the baseline, was significantly lower in the obese (12.5%) patients than in the non-obese (52.9%) ones. The differences in diastolic response (58.8 and 25% for non-obese and obese patients, respectively) did not reach significance. The percentage response to CCBs, however, was significantly less in the obese patients than in the non-obese patients for both systolic and diastolic blood pressure. Corticosteroids also significantly influenced the response to CCBs in terms of diastolic pressure (62.9 and 25% for non-obese and obese patients, respectively). None of the tested covariates, including obesity, was found to significantly influence the response to ANGIs alone or in various combinations with CCBs. In conclusion, obesity and corticosteroid therapy should be considered when initiating antihypertensive drug treatment in children with kidney disease as both may contribute to a reduced efficacy of the antihypertensive therapy.
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Affiliation(s)
- Sherif Hanafy
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, 3118 Dentistry/Pharmacy Building, Edmonton, Alberta, Canada, T6G 2N8
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30
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Abstract
Glycogen storage disease 1b (GSD 1b) is caused by a deficiency of glucose-6-phosphate translocase and the intracellular accumulation of glycogen. The disease presents with failure to thrive, hepatomegaly, hypoglycemia, lactic acidosis, as well as neutropenia causing increased susceptibility to pyogenic infections. We present a case of a young woman with GSD 1b who developed acute myelogenous leukemia while on long-term granulocyte colony-stimulating factor therapy. The presence of two rare diseases in a single patient raises suspicion that GSD 1b and acute myelogenous leukemia are linked. Surveillance for acute myelogenous leukemia should become part of the long-term follow-up for GSD 1b.
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Affiliation(s)
- Maury Pinsk
- Department of Pediatrics, University of Virginia Children's Medical Center, Room 2010, MR-4 Building, 300 Lane Road, Charlottesville, VA 22908-0386, USA.
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31
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Tracy JI, Pinsk M, Helverson J, Urban G, Dietz T, Smith DJ. Test of a potential link between analytic and nonanalytic category learning and automatic, effortful processing. Brain Cogn 2001; 46:326-41. [PMID: 11487283 DOI: 10.1006/brcg.2001.1288] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The link between automatic and effortful processing and nonanalytic and analytic category learning was evaluated in a sample of 29 college undergraduates using declarative memory, semantic category search, and pseudoword categorization tasks. Automatic and effortful processing measures were hypothesized to be associated with nonanalytic and analytic categorization, respectively. Results suggested that contrary to prediction strong criterion-attribute (analytic) responding on the pseudoword categorization task was associated with strong automatic, implicit memory encoding of frequency-of-occurrence information. Data are discussed in terms of the possibility that criterion-attribute category knowledge, once established, may be expressed with few attentional resources. The data indicate that attention resource requirements, even for the same stimuli and task, vary depending on the category rule system utilized. Also, the automaticity emerging from familiarity with analytic category exemplars is very different from the automaticity arising from extensive practice on a semantic category search task. The data do not support any simple mapping of analytic and nonanalytic forms of category learning onto the automatic and effortful processing dichotomy and challenge simple models of brain asymmetries for such procedures.
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Affiliation(s)
- J I Tracy
- Thomas Jefferson University/Jefferson Medical College, 111 South 11th Street, Philadelphia, PA 19107, USA.
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32
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Abstract
Neurological complications post transplant have been described with the use of calcineurin inhibitors. Although tacrolimus may be a better immunosuppressant than cyclosporine, its neurological side effects may be worse. Two children, living-related kidney transplant recipients, were treated with antibody induction, mycophenolate mofetil, prednisone, and tacrolimus. Soon after transplant, they each developed an encephalopathy, which when visualized by magnetic resonance imaging showed that it affected both white and grey matter of the brain. Although the encephalopathy was associated with the use of tacrolimus, there was a complete neurological recovery without cessation of the drug.
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Affiliation(s)
- P Parvex
- Department of Pediatrics, Montreal Children's Hospital, McGill University, Quebec, Canada.
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Tracy JI, Faro SH, Mohamed FB, Pinsk M, Pinus A. Functional localization of a "Time Keeper" function separate from attentional resources and task strategy. Neuroimage 2000; 11:228-42. [PMID: 10694465 DOI: 10.1006/nimg.2000.0535] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The functional neuroanatomy of time estimation has not been well-documented. This research investigated the fMRI measured brain response to an explicit, prospective time interval production (TIP) task. The study tested for the presence of brain activity reflecting a primary time keeper function, distinct from the brain systems involved either in conscious strategies to monitor time or attentional resource and other cognitive processes to accomplish the task. In the TIP task participants were given a time interval and asked to indicate when it elapsed. Two control tasks (counting forwards, backwards) were administered, in addition to a dual task format of the TIP task. Whole brain images were collected at 1.5 Tesla. Analyses (n = 6) yielded a statistical parametric map (SPM ¿z¿) reflecting time keeping and not strategy (counting, number manipulation) or attention resource utilization. Additional SPM ¿z¿s involving activation associated with the accuracy and magnitude the of time estimation response are presented. Results revealed lateral cerebellar and inferior temporal lobe activation were associated with primary time keeping. Behavioral data provided evidence that the procedures for the explicit time judgements did not occur automatically and utilized controlled processes. Activation sites associated with accuracy, magnitude, and the dual task provided indications of the other structures involved in time estimation that implemented task components related to controlled processing. The data are consistent with prior proposals that the cerebellum is a repository of codes for time processing, but also implicate temporal lobe structures for this type of time estimation task.
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Affiliation(s)
- J I Tracy
- Department of Psychiatry, Department of Radiology, MCP Hahnemann University School of Medicine, 3200 Henry Avenue, Philadelphia, Pennsylvania, 19129, USA
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34
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Abstract
The efficacy of angiotensin converting enzyme inhibitors in the treatment of heart disease is due in part to the accumulation of bradykinin (BK). Since BK can exert its effect by influencing cell proliferation, we chose to study the effect of BK on the growth of A10 vascular smooth muscle cells. Ligand binding studies to determine which BK receptor subtypes are present on A10 cells showed that both B1 and B2 receptors were present in approximately equal numbers. Examination of RNA synthesis demonstrated that BK inhibits uridine incorporation in a dose-dependent manner. This decrease in RNA synthesis was blocked by both B1 and B2 receptor antagonists, as well as by addition of indomethacin, a cyclooxygenase inhibitor. The latter result suggested that prostaglandins mediate the biological actions of BK. Consequently, we examined the direct effect of two prostaglandins, PGE2 and PGI2 (prostacyclin), on A10 cells. PGE2 caused a decrease in RNA synthesis, thus mimicking the effect of BK, while PGI2 did not. Therefore, the inhibition of RNA synthesis in A10 vascular smooth muscle cells by BK requires both B1 and B2 receptor subtypes and this action of BK is apparently mediated by de novo synthesis of prostaglandins.
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Affiliation(s)
- L Yau
- Division of Cardiovascular Sciences, Department of Physiology, University of Manitoba, Winnipeg, Canada
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