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Lee AM, Xu Y, Hu J, Xiao R, Hooper SR, Hartung EA, Coresh J, Rhee EP, Vasan RS, Kimmel PL, Warady BA, Furth SL, Denburg MR. Longitudinal Plasma Metabolome Patterns and Relation to Kidney Function and Proteinuria in Pediatric CKD. Clin J Am Soc Nephrol 2024; 19:837-850. [PMID: 38709558 PMCID: PMC11254025 DOI: 10.2215/cjn.0000000000000463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 04/29/2024] [Indexed: 05/08/2024]
Abstract
Key Points Longitudinal untargeted metabolomics. Children with CKD have a circulating metabolome that changes over time. Background Understanding plasma metabolome patterns in relation to changing kidney function in pediatric CKD is important for continued research for identifying novel biomarkers, characterizing biochemical pathophysiology, and developing targeted interventions. There are a limited number of studies of longitudinal metabolomics and virtually none in pediatric CKD. Methods The CKD in Children study is a multi-institutional, prospective cohort that enrolled children aged 6 months to 16 years with eGFR 30–90 ml/min per 1.73 m2. Untargeted metabolomics profiling was performed on plasma samples from the baseline, 2-, and 4-year study visits. There were technologic updates in the metabolomic profiling platform used between the baseline and follow-up assays. Statistical approaches were adopted to avoid direct comparison of baseline and follow-up measurements. To identify metabolite associations with eGFR or urine protein-creatinine ratio (UPCR) among all three time points, we applied linear mixed-effects (LME) models. To identify metabolites associated with time, we applied LME models to the 2- and 4-year follow-up data. We applied linear regression analysis to examine associations between change in metabolite level over time (∆level) and change in eGFR (∆eGFR) and UPCR (∆UPCR). We reported significance on the basis of both the false discovery rate (FDR) <0.05 and P < 0.05. Results There were 1156 person-visits (N : baseline=626, 2-year=254, 4-year=276) included. There were 622 metabolites with standardized measurements at all three time points. In LME modeling, 406 and 343 metabolites associated with eGFR and UPCR at FDR <0.05, respectively. Among 530 follow-up person-visits, 158 metabolites showed differences over time at FDR <0.05. For participants with complete data at both follow-up visits (n =123), we report 35 metabolites with ∆level–∆eGFR associations significant at FDR <0.05. There were no metabolites with significant ∆level–∆UPCR associations at FDR <0.05. We report 16 metabolites with ∆level–∆UPCR associations at P < 0.05 and associations with UPCR in LME modeling at FDR <0.05. Conclusions We characterized longitudinal plasma metabolomic patterns associated with eGFR and UPCR in a large pediatric CKD population. Many of these metabolite signals have been associated with CKD progression, etiology, and proteinuria in previous CKD Biomarkers Consortium studies. There were also novel metabolite associations with eGFR and proteinuria detected.
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Affiliation(s)
- Arthur M. Lee
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Yunwen Xu
- Department of Epidemiology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland
| | - Jian Hu
- Department of Human Genetics, Emory University School of Medicine, Atlanta, Georgia
| | - Rui Xiao
- Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
- Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Stephen R. Hooper
- Department of Health Sciences, School of Medicine, University of North Carolina-Chapel Hill, Chapel Hill, North Carolina
| | - Erum A. Hartung
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Josef Coresh
- Department of Epidemiology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
- NYU Grossman School of Medicine, New York, New York
| | - Eugene P. Rhee
- Division of Nephrology, Massachusetts General Hospital, Boston, Massachusetts
- Harvard Medical School, Boston, Massachusetts
| | - Ramachandran S. Vasan
- Boston University School of Medicine, Boston, Massachusetts
- Boston University School of Public Health, Boston, Massachusetts
| | - Paul L. Kimmel
- Division of Kidney, Urologic, and Hematologic Diseases, National Institutes of Health, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland
| | - Bradley A. Warady
- Division of Nephrology, Children’s Mercy Kansas City, Kansas City, Missouri
- University of Missouri-Kansas City School of Medicine, Kansas City, Missouri
| | - Susan L. Furth
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
- Children’s Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania
- Department of Pediatrics and Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Michelle R. Denburg
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
- Department of Pediatrics and Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
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Anderson CE, Tuokkola J, Qizalbash L, Harmer M, Nelms CL, Stabouli S, Toole B, Polderman N, Desloovere A, Renken-Terhaerdt J, Vega MRW, Snauwaert E, Walle JV, Haffner D, Paglialonga F, Shroff R, Shaw V, Greenbaum LA, Warady BA. Assessment and management of vitamin status in children with CKD stages 2-5, on dialysis and post-transplantation: clinical practice points from the Pediatric Renal Nutrition Taskforce. Pediatr Nephrol 2024:10.1007/s00467-024-06303-x. [PMID: 38570350 DOI: 10.1007/s00467-024-06303-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 01/10/2024] [Accepted: 01/10/2024] [Indexed: 04/05/2024]
Abstract
Children with chronic kidney disease (CKD) are at risk for vitamin deficiency or excess. Vitamin status can be affected by diet, supplements, kidney function, medications, and dialysis. Little is known about vitamin requirements in CKD, leading to practice variation.The Pediatric Renal Nutrition Taskforce (PRNT), an international team of pediatric kidney dietitians and pediatric nephrologists, was established to develop evidence-based clinical practice points (CPPs) to address challenges and to serve as a resource for nutritional care. Questions were formulated using PICO (Patient, Intervention, Comparator, Outcomes), and literature searches undertaken to explore clinical practice from assessment to management of vitamin status in children with CKD stages 2-5, on dialysis and post-transplantation (CKD2-5D&T). The CPPs were developed and finalized using a Delphi consensus approach. We present six CPPs for vitamin management for children with CKD2-5D&T. We address assessment, intervention, and monitoring. We recommend avoiding supplementation of vitamin A and suggest water-soluble vitamin supplementation for those on dialysis. In the absence of evidence, a consistent structured approach to vitamin management that considers assessment and monitoring from dietary, physical, and biochemical viewpoints is needed. Careful consideration of the impact of accumulation, losses, comorbidities, and medications needs to be explored for the individual child and vitamin before supplementation can be considered. When supplementing, care needs to be taken not to over-prescribe. Research recommendations are suggested.
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Affiliation(s)
- Caroline E Anderson
- University Hospital Southampton NHS Foundation Trust, Southampton, UK.
- Human Development & Health, Faculty of Medicine, University of Southampton, Southampton, UK.
- University of Winchester, Winchester, UK.
| | - Jetta Tuokkola
- Clinical Nutrition Unit, Internal Medicine and Rehabilitation, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
- Department of Medicine, Endocrinology and Clinical Nutrition, Kuopio University Hospital, Kuopio, Finland
| | | | - Matthew Harmer
- University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | | | - Stella Stabouli
- 1st Department of Pediatrics, Aristotle University, Hippokratio Hospital, Thessaloniki, Greece
| | - Barry Toole
- Great Northern Children's Hospital, Newcastle Upon Tyne, UK
| | | | | | - Jose Renken-Terhaerdt
- Wilhemina Children's Hospital, University Medical Center Utrecht, Utrecht, The Netherlands
| | | | | | | | - Dieter Haffner
- Hannover Medical School, Children's Hospital, Hannover, Germany
| | - Fabio Paglialonga
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Rukshana Shroff
- University College London Great Ormond Street Hospital Institute of Child Health, London, UK
| | - Vanessa Shaw
- University College London Great Ormond Street Hospital Institute of Child Health, London, UK
| | - Larry A Greenbaum
- Emory University, Atlanta, GA, USA
- Children's Healthcare of Atlanta, Atlanta, GA, USA
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Tuokkola J, Kiviharju E, Jahnukainen T, Hölttä T. Differences in Dietary Intake and Vitamin and Mineral Status of Infants and Children on Dialysis Receiving Feeds or Eating Normal Food. J Ren Nutr 2020; 31:144-154. [PMID: 32919822 DOI: 10.1053/j.jrn.2020.07.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 06/10/2020] [Accepted: 07/16/2020] [Indexed: 01/31/2023] Open
Abstract
OBJECTIVES Knowledge of the vitamin and mineral intake and status of children on dialysis is scarce. Guidelines suggest supplementation of water-soluble vitamins, but the need for supplementation of minerals is less clear. We evaluated vitamin and mineral intake and status of children on chronic dialysis in our center. METHODS We reviewed patient records of all 33 children aged 0-16 years who were treated with chronic dialysis at a University Hospital between December 2014 and August 2019. Dietary intake was estimated from feed prescriptions and 3-day food records. Vitamin and mineral determinations were performed as part of routine care. RESULTS Food records or adherence to dietary prescription of feeds were available for 29 children. Dietary intake of most nutrients was sufficient in children on feeds, but children not on feeds had low intakes of vitamins D, B1, B2, and B6 as well as zinc, iron, and calcium from their diet. Insufficient intake was corrected with supplementation. We discovered some children with blood concentrations below the reference range for vitamins D (3.1%) and C (15.4%) and copper (16.7%) and selenium (3.1%). In contrast, various proportions of children with blood concentrations above the reference range were detected for all nutrients apart from vitamin D. CONCLUSIONS In our study, children receiving sufficient amounts of renal-specific feeds to meet at least 100% of age-specific requirements do not appear to need multivitamin-mineral supplementation, apart from vitamin D and calcium; in addition, children on PD usually need a sodium supplement and, on rare occasions with low intake from feeds, a phosphate supplement is needed. This study further revealed that other children at our center are more prone to deficient intakes of several vitamins and minerals, requiring supplementation based on dietetic review and, in some instances, laboratory measurements.
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Affiliation(s)
- Jetta Tuokkola
- New Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland; Clinical Nutrition Unit, Internal Medicine and Rehabilitation, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.
| | - Elina Kiviharju
- New Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Timo Jahnukainen
- New Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Tuula Hölttä
- New Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
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Pellett Madan R, Penkert RR, Surman SL, Jones BG, Houston J, Lamour JM, Del Rio M, Herold BC, Hurwitz JL. Persistent hypogammaglobulinemia in pediatric solid organ transplant recipients. Clin Transplant 2020; 34:e14021. [PMID: 32575155 DOI: 10.1111/ctr.14021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 06/12/2020] [Accepted: 06/13/2020] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Hypogammaglobulinemia has not been well studied in pediatric solid organ transplant (SOT) recipients. We evaluated plasma immunoglobulin (Ig) and lymphocyte phenotypes among 31 pediatric heart and kidney recipients for two years post-transplant and from 10 non-transplanted children. METHODS Plasma IgM, IgG, and IgA were quantified by immunoturbidimetric assays, IgG subclasses were quantified by bead-based multiplex immunoassay, and lymphocyte phenotypes were assessed by flow cytometry. RESULTS Median age at transplant for SOT recipients was similar to that of the control cohort (15 vs. 12.5 years, respectively; P = .61). Mean plasma IgG and IgM levels for SOT recipients fell significantly below the control cohort means by 1 month post-transplant (P < .001 for both) and remained lower than control levels at 12-18 months post-transplant. Heart recipients had lower frequencies of a CD4+ naïve T lymphocytes relative to kidney recipients. CONCLUSIONS Hypogammaglobulinemia was prevalent and persistent among pediatric SOT recipients and may be secondary to immunosuppressive medications, as well as loss of thymus tissue and CD45RA+ CD4+ T cells in heart recipients. Limitations of our study include but are not limited to small sample size from a single center, lack of samples for all participants at every time point, and lack of peripheral blood mononuclear cell samples for the non-transplanted cohort.
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Affiliation(s)
- Rebecca Pellett Madan
- Department of Pediatrics, The Children's Hospital at Montefiore and Albert Einstein College of Medicine, Bronx, NY, USA.,Department of Pediatrics, New York University Grossman School of Medicine and Hassenfeld Children's Hospital at NYU Langone, New York, NY, USA
| | - Rhiannon R Penkert
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Sherri L Surman
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Bart G Jones
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - James Houston
- Department of Neurology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Jacqueline M Lamour
- Department of Pediatrics, The Children's Hospital at Montefiore and Albert Einstein College of Medicine, Bronx, NY, USA
| | - Marcela Del Rio
- Department of Pediatrics, The Children's Hospital at Montefiore and Albert Einstein College of Medicine, Bronx, NY, USA
| | - Betsy C Herold
- Department of Pediatrics, The Children's Hospital at Montefiore and Albert Einstein College of Medicine, Bronx, NY, USA
| | - Julia L Hurwitz
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, USA.,Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, TN, USA
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Manickavasagar B, McArdle AJ, Yadav P, Shaw V, Dixon M, Blomhoff R, Connor GO, Rees L, Ledermann S, van’t Hoff W, Shroff R. Hypervitaminosis A is prevalent in children with CKD and contributes to hypercalcemia. Pediatr Nephrol 2015; 30:317-25. [PMID: 25119682 PMCID: PMC4282719 DOI: 10.1007/s00467-014-2916-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2014] [Revised: 05/24/2014] [Accepted: 07/14/2014] [Indexed: 11/03/2022]
Abstract
BACKGROUND Vitamin A accumulates in renal failure, but the prevalence of hypervitaminosis A in children with predialysis chronic kidney disease (CKD) is not known. Hypervitaminosis A has been associated with hypercalcemia. In this study we compared dietary vitamin A intake with serum retinoid levels and their associations with hypercalcemia. METHODS We studied the relationship between vitamin A intake, serum retinoid levels, and serum calcium in 105 children with CKD stages 2-5 on dialysis and posttransplant. Serum retinoid measures included retinol (ROH), its active retinoic acid (RA) metabolites [all-trans RA (at-RA) and 13-cis RA] and carrier proteins [retinol-binding protein-4 (RBP4) and transthyretin (TTR)]. Dietary vitamin A intake was assessed using a food diary. RESULTS Twenty-five children were in CKD 2-3, 35 in CKD 4-5, 23 on dialysis and 22 posttransplant; 53 % had vitamin A intake above the Reference Nutrient Intake (RNI) value. Children receiving supplemental feeds compared with diet alone had higher vitamin A intake (p = 0.02) and higher serum ROH (p < 0.001). Notably, increased ROH was seen as early as CKD stage 2. For every 10 ml/min/1.73 m(2) fall in estimated glomerular filtration rate (eGFR), there was a 13 % increase in ROH. RBP4 levels were increased in CKD 3-5 and dialysis patients. The lowest ratios of ROH:RBP4 were seen in dialysis compared with CKD 2-3 (p = 0.03), suggesting a relative increase in circulating RBP4. Serum ROH, RBP4 and at-RA were associated with serum calcium. On multivariable analysis RBP4 levels and alfacalcidol dose were significant predictors of serum calcium (model R (2) 32 %) in dialysis patients. CONCLUSIONS Hypervitaminosis A is seen in early CKD, with highest levels in children on supplemental feeds compared with diet alone. Serum retinoid levels significantly predict hypercalcemia.
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Affiliation(s)
- Baheerathi Manickavasagar
- Department of Dietetics, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Andrew J. McArdle
- Nephrology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Pallavi Yadav
- Nephrology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Vanessa Shaw
- Department of Dietetics, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Marjorie Dixon
- Department of Dietetics, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Rune Blomhoff
- Department of Nutrition, University of Oslo, Oslo, Norway
| | - Graeme O’ Connor
- Department of Dietetics, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Lesley Rees
- Nephrology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Sarah Ledermann
- Nephrology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - William van’t Hoff
- Nephrology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Rukshana Shroff
- Nephrology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
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Peritoneal adipocytes and their role in inflammation during peritoneal dialysis. Mediators Inflamm 2010; 2010:495416. [PMID: 20454534 PMCID: PMC2864891 DOI: 10.1155/2010/495416] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2009] [Revised: 01/27/2010] [Accepted: 02/17/2010] [Indexed: 01/04/2023] Open
Abstract
Adipose tissue is a major site of chronic inflammation associated with peritoneal dialysis (PD) frequently complicating peritonitis. Adiposity-associated inflammation plays a significant contributory role in the development of chronic inflammation in patients undergoing maintenance PD. However, the molecular and cellular mechanisms of this link remain uncertain. Adipose tissue synthesizes different adipokines and cytokines that orchestrate and regulate inflammation, insulin action, and glucose metabolism locally and systemically. In return, inflammation retards adipocyte differentiation and further exacerbates adipose dysfunction and inflammation. An understanding of the inflammatory roles played by adipose tissue during PD and the healing mechanism of injured mesothelium will help to devise new therapeutic approach to slow the progression of peritoneal damage during peritoneal dialysis. This article reviews the roles of peritoneal adipose tissue in chronic peritoneal inflammation under PD and in serosal repair during PD.
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