1
|
Wallace A, Price A, Fleischer E, Khoury M, Filler G. Estimation of GFR in Patients With Cystic Fibrosis: A Cross-Sectional Study. Can J Kidney Health Dis 2020; 7:2054358119899312. [PMID: 32002189 PMCID: PMC6966245 DOI: 10.1177/2054358119899312] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 11/06/2019] [Indexed: 01/05/2023] Open
Abstract
Background Patients with cystic fibrosis (CF) have frequent infectious complications requiring nephrotoxic medications, necessitating monitoring of renal function. Although adult studies have suggested that cystatin C (CysC)-based estimated glomerular filtration rate (eGFR) may be preferable due to reduced muscle mass of patients with CF, pediatric patients remain understudied. Objective Our objective was to determine which eGFR formula is best for estimating glomerular filtration rate (GFR) in pediatric patients with CF. Methods A total of 17 patients with CF treated with nephrotoxic antibiotics were recruited from the Children's Hospital at London Health Sciences Centre, London, Ontario, Canada. 99Tc DTPA GFR (measured GFR [mGFR]) was measured with 4-point measurements starting at 120 minutes using a 2-compartmental model with Brøchner-Mortensen correction, with simultaneous measurement of creatinine, urea, and CysC. The eGFR was calculated using 16 known equations based on creatinine, urea, CysC, or combinations of these. Primary outcome measures were correlation with mGFR, and agreement within 10% for various eGFR equations. Results Mean mGFR was 136 ± 21 mL/min/1.73 m2. Mean creatinine, CysC, and urea were 38 ± 10 μmol/L, 0.72 ± 0.08 mg/L, and 3.9 ± 1.4 mmol/L, respectively. The 2014 Grubb CysC eGFR had the best correlation coefficient (r = 0.75, P = .0004); however, only 35% were within 10%. The new Schwartz formula with creatinine and urea had the best agreement within 10%, but a relatively low correlation coefficient (r = 0.63, P = .0065, 64% within 10%). Conclusions Our study suggests that none of the eGFR formulae work well in this small cohort of pediatric patients with CF with preserved body composition, possibly due to inflammation causing false elevations of CysC. Based on the small numbers, we cannot conclude which eGFR formula is best.
Collapse
Affiliation(s)
- Andrea Wallace
- Department of Paediatrics, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
| | - April Price
- Division of Paediatric Respirology, Department of Paediatrics, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
| | - Erin Fleischer
- Division of Paediatric Respirology, Department of Paediatrics, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
| | - Michael Khoury
- Department of Paediatrics, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
| | - Guido Filler
- Division of Paediatric Nephrology, Department of Paediatrics, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada.,Lilibeth Caberto Kidney Clinical Research Unit, Children's Hospital, London Health Sciences Centre, Western University, ON, Canada.,Division of Nephrology, Department of Medicine, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada.,Department of Pathology and Laboratory Medicine, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
| |
Collapse
|
2
|
Johnson JN, Filler G. The importance of cardiovascular disease in pediatric transplantation and its link to the kidneys. Pediatr Transplant 2018; 22:e13146. [PMID: 29441655 DOI: 10.1111/petr.13146] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/29/2017] [Indexed: 02/07/2023]
Abstract
Cardiovascular disease is a frequent cause of morbidity and mortality in pediatric patients following solid organ transplant. CKD is also common in pediatric patients after a solid organ transplant, and the link between CKD and cardiovascular morbidity is strong. In this review, we examine potential etiologies to explain the risk of cardiovascular morbidity and mortality in pediatric solid organ recipients and identify targets for improving outcomes.
Collapse
Affiliation(s)
- Jonathan N Johnson
- Department of Pediatrics/Division of Pediatric Cardiology, Mayo Clinic, Rochester, Minnesota.,Department of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota
| | - Guido Filler
- Department of Paediatrics, Schulich School of Medicine & Dentistry, London, ON, Canada.,Department of Medicine, Schulich School of Medicine & Dentistry, London, ON, Canada.,Department of Pathology and Laboratory Medicine, Schulich School of Medicine & Dentistry, University of Western Ontario, London, ON, Canada
| |
Collapse
|
3
|
Hoskote A, Burch M. Peri-operative kidney injury and long-term chronic kidney disease following orthotopic heart transplantation in children. Pediatr Nephrol 2015; 30:905-18. [PMID: 25115875 PMCID: PMC4544563 DOI: 10.1007/s00467-014-2878-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Revised: 05/23/2014] [Accepted: 06/03/2014] [Indexed: 01/13/2023]
Abstract
Significant advances in cardiac intensive care including extracorporeal life support have enabled children with complex congenital heart disease and end-stage heart failure to be supported while awaiting transplantation. With an increasing number of survivors after heart transplantation in children, the complications from long-term immunosuppression, including renal insufficiency, are becoming more apparent. Severe renal dysfunction after heart transplant is defined by a serum creatinine level >2.5 mg/dL (221 μmol/L), and/or need for dialysis or renal transplant. The degree of renal dysfunction is variable and is progressive over time. About 3-10 % of heart transplant recipients will go on to develop severe renal dysfunction within the first 10 years post-transplantation. Multiple risk factors for chronic kidney disease post-transplant have been identified, which include pre-transplant worsening renal function, recipient demographics and morbidity, peri-transplant haemodynamics and long-term exposure to calcineurin inhibitors. Renal insufficiency increases the risk of post-transplant morbidity and mortality. Hence, screening for renal dysfunction pre-, peri- and post-transplantation is important. Early and timely detection of renal insufficiency may help minimize renal insults, and allow prompt implementation of renoprotective strategies. Close monitoring and pre-emptive management of renal dysfunction is an integral aspect of peri-transplant and subsequent post-transplant long-term care.
Collapse
Affiliation(s)
- Aparna Hoskote
- Cardiac Intensive Care and ECMO, Institute of Child Health, Great Ormond Street Hospital for Children NHS Foundation Trust, Great Ormond Street, London, WC1N 3JH, UK,
| | - Michael Burch
- Cardiothoracic Unit, Great Ormond Street Hospital, Great Ormond Street Hospital for Children NHS Foundation Trust, Great Ormond Street, London, UK
| |
Collapse
|
4
|
Filler G, Huang SHS. High prevalence of renal dysfunction also after small bowel transplantation. Pediatr Transplant 2013. [PMID: 23198902 DOI: 10.1111/petr.12025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Shih-Han Susan Huang
- Department of Medicine; Schulich School of Medicine & Dentistry; London; ON; Canada
| |
Collapse
|
5
|
Feingold B, Brooks MM, Zeevi A, Ohmann EL, Burckart GJ, Ferrell RE, Chinnock R, Canter C, Addonizio L, Bernstein D, Kirklin JK, Naftel DC, Webber SA. Renal function and genetic polymorphisms in pediatric heart transplant recipients. J Heart Lung Transplant 2012; 31:1003-8. [PMID: 22789135 DOI: 10.1016/j.healun.2012.05.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2012] [Revised: 05/11/2012] [Accepted: 05/14/2012] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Common genetic variations influence rejection, infection, drug metabolism, and side effect profiles after pediatric heart transplantation. Reports in adults suggest that genetic background may influence post-transplant renal function. In this multicenter study, we investigated the association of genetic polymorphisms (GPs) in a panel of candidate genes on renal function in 453 pediatric heart transplant recipients. METHODS We performed genotyping for functional GPs in 19 candidate genes. Renal function was determined annually after transplantation by calculation of the estimated glomerular filtration rate (eGFR). Mixed-effects and Cox proportional hazard models were used to assess recipient characteristics and the effect of GPs on longitudinal eGFR and time to eGFR < 60 mL/min/1.73m(2). RESULTS Mean age at transplantation was 6.2 ± 6.1 years. Mean follow-up was 5.1 ± 2.5 years. Older age at transplant and black race were independently associated with post-transplant renal dysfunction. Univariate analyses showed FASL (C-843T) T allele (p = 0.014) and HO-1 (A326G) G allele (p = 0.0017) were associated with decreased renal function. After adjusting for age and race, these associations were attenuated (FASL, p = 0.075; HO-1, p = 0.053). We found no associations of other GPs with post-transplant renal function, including GPs in TGFβ1, CYP3A5, ABCB1, and ACE. CONCLUSIONS In this multicenter, large, sample of pediatric heart transplant recipients, we found no strong associations between GPs in 19 candidate genes and post-transplant renal function. Our findings contradict reported associations of CYP3A5 and TGFβ1 with renal function and suggest that genotyping for these GPs will not facilitate individualized immunosuppression for the purpose of protecting renal function after pediatric heart transplantation.
Collapse
Affiliation(s)
- Brian Feingold
- Pediatric Cardiology, Children's Hospital of Pittsburgh of UPMC, Pittsburgh, PA, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Behnke-Hall K, Bauer J, Thul J, Akintuerk H, Reitz K, Bauer A, Schranz D. Renal function in children with heart transplantation after switching to CNI-free immunosuppression with everolimus. Pediatr Transplant 2011; 15:784-9. [PMID: 21883744 DOI: 10.1111/j.1399-3046.2011.01550.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Renal impairment because of CNI contributes to long-term morbidity. Therefore, CNI avoiding or sparing treatment strategies are important. In this article, we describe the results of a CNI-free treatment protocol with regard to recovery of renal function. Twenty-eight patients with heart transplantation were switched from CNI regimen to everolimus and mycophenolate, when cGFR was <75 mL/min/1.73 m(2). In all patients, CNI was stopped, when everolimus trough levels of 5-8 ng/L were achieved. Serum creatinine and cGFR were determined before and after 6 and 12 months. Median serum creatinine decreased from 1.2 mg/dL (range 0.7-3.7) before everolimus to 1.0 (range 0.6-1.8) and 1.0 (range 0.5-1.9) mg/dL after 6 and 12 months. Median cGFR was 47.81 (range 18.3-72.6) mL/min/1.73 m(2) before everolimus and 63.1 (range 37.8-108.7) mL/min/1.73 m(2) at six months and 64.8 (range 37.7-106.6) mL/min/1.73 m(2) after 12 months. All changes from baseline to six and 12 months were statistically significant (p < 0.05). Adverse events were infections (n = 3) and rejections (n = 3). Therapy was discontinued in four patients. Conversion to CNI-free immunosuppression resulted in significant improvements of renal function within six months of CNI withdrawal. Side effects are common. However, more studies are required to demonstrate the effectiveness in children.
Collapse
|
7
|
|
8
|
Feingold B, Zheng J, Law YM, Morrow WR, Hoffman TM, Schechtman KB, Dipchand AI, Canter CE. Risk factors for late renal dysfunction after pediatric heart transplantation: a multi-institutional study. Pediatr Transplant 2011; 15:699-705. [PMID: 22004544 PMCID: PMC3201752 DOI: 10.1111/j.1399-3046.2011.01564.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Renal dysfunction is a major determinant of outcome after HTx. Using a large, multi-institutional database, we sought to identify factors associated with late renal dysfunction after pediatric HTx. All patients in the PHTS database with eGFR ≥60 mL/min/1.73 m(2) at one yr post-HTx (n = 812) were analyzed by Cox regression for association with risk factors for eGFR <60 mL/min/1.73 m(2) at >1 yr after HTx. Freedom from late renal dysfunction was 71% and 57% at five and 10 yr. Multivariate risk factors for late renal dysfunction were earlier era of HTx (HR 1.84; p < 0.001), black race (HR 1.42; p = 0.048), rejection with hemodynamic compromise in the first year after HTx (HR 1.74; p = 0.038), and lowest quartile eGFR at one yr post-HTx (HR 1.83; p < 0.001). Renal function at HTx was not associated with onset of late renal dysfunction. Eleven patients (1.4%) required chronic dialysis and/or renal transplant during median follow-up of 4.1 yr (1.5-12.6). Late renal dysfunction is common after pediatric HTx, with blacks at increased risk. Decreased eGFR at one yr post-HTx, but not at HTx, predicts onset of late renal dysfunction. Future research on strategies to minimize late renal dysfunction after pediatric HTx may be of greatest benefit if focused on these subgroups.
Collapse
Affiliation(s)
- Brian Feingold
- Pediatric Cardiology, Children's Hospital of Pittsburgh of UPMC, Pittsburgh, PA 15224, USA.
| | - Jie Zheng
- Biostatistics, Washington University, St. Louis, MO 63110
| | - Yuk M. Law
- Pediatric Cardiology, Seattle Children's Hospital, Seattle, WA 98105
| | | | - Timothy M Hoffman
- Nationwide Children's Heart Center, Nationwide Children's Hospital, Columbus, OH 43205
| | | | | | | | | |
Collapse
|