Publications by authors named "Isabelle Vrillon"

Background: Lumasiran is a small interfering RNA molecule indicated for the treatment of primary hyperoxaluria type 1 (PH1).

Case Diagnosis/treatment: We report a case of infantile PH1 in a 3-month-old girl admitted with anuria and kidney failure. Peritoneal dialysis (PD) and conservative treatment were immediately initiated.

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Introduction: Denys-Drash syndrome (DDS) is a rare disease typically associated with a triad of early onset nephrotic syndromes (NS), susceptibility to Wilms tumor (WT), and genitourinary structural defects. DDS is caused by Wilms' tumor suppression gene () variants, with the most frequent variants in exons 8 and 9. This study aimed to evaluate the long-term clinical outcomes and genotype-to-phenotype correlations in a large, multicenter cohort of children with typical DDS.

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Introduction: Lumasiran is a drug used in RNA-interference (RNAi) therapy for primary hyperoxaluria type 1 (PH1). Data on its efficacy and safety mainly come from industry-sponsored trials.

Methods: For postmarketing follow-up, French authorities requested a quasi-exhaustive retrospective and prospective study over 5 years for patients receiving lumasiran, requiring the inclusion of at least 90% of patients, named as the DAILY-LUMA cohort (NCT06225882).

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Background: Idiopathic nephrotic syndrome (INS) in children is the most common glomerular disease and is characterized by recurrent relapses. There is no community consensus on the treatment of relapsing forms of nephrotic syndrome in children, unlike that for the initial presentation. To date, available treatments only enable relapsing patients to be maintained in remission, rather than modifying the course of the disease; therefore, more therapeutic trials are needed.

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Article Synopsis
  • - The study focuses on the impact of Hepatocyte Nuclear Factor 1-beta (HNF1B) gene variants and chromosome 17q12 deletion (17q12del) on kidney disease progression, particularly chronic kidney disease (CKD), in a large cohort of 521 patients.
  • - Findings reveal that patients with the 17q12del experience a significant delay in the progression to CKD stage 3 compared to those with other HNF1B variants, with specific mutations in the DNA-binding domains correlating with even better outcomes.
  • - Additionally, the 17q12del is linked to lower magnesium levels (hypomagnesemia) and higher likelihood of elevated uric acid levels (hyperuric
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Aim: This study evaluated the bias and accuracy of the CKD-EPI/CKiD and EKFC equations compared with the reference exogenous tracer-based assessment of glomerular filtration rate (GFR) in adult and pediatric patients according to their renal transplant status.

Methods: We assessed the bias and P accuracy of the CKD-EPI/CKiD and EKFC equations compared with iohexol-based GFR measurement.

Results: In the overall population (n = 59), the median age was 29 years (IQR, 16.

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  • Renal dysfunction frequently occurs in patients with cirrhosis, either due to acute illness or the progression of liver disease, but comprehensive evaluations of renal function markers have not been thoroughly studied.
  • A retrospective study was conducted on hospitalized cirrhosis patients from January 2021 to June 2023, involving a detailed assessment of renal function across 43 parameters.
  • The findings revealed that most patients exhibited renal abnormalities, with significant overestimations in estimated glomerular filtration rates compared to measured creatinine clearance, highlighting the importance of multiparametric assessments for properly evaluating kidney function in these patients.*
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  • - A 17-year-old Caucasian male experienced severe health issues including acute renal failure and anemia after five days of diarrhea, with stool cultures revealing a germ often linked to hemolytic uremic syndrome (HUS) although its role was uncertain.
  • - Initial tests ruled out common triggers of HUS, but the patient's condition worsened, leading to emergency renal replacement therapy and subsequent acute heart failure.
  • - After identifying a specific genetic mutation related to the complement pathway, the patient received eculizumab treatment, which improved his heart function and kidney performance, but he required ongoing dialysis and long-term therapy for potential disease recurrence.
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Background: Cytomegalovirus (CMV) is one of the most frequent opportunistic infections in kidney transplant (KT) recipients and is a risk factor for patient and graft survival after KT. Center-to-center variation, optimal prevention and treatment strategies in pediatric KT are currently unknown. This survey aimed to assess current CMV prevention and treatment strategies used among French pediatric KT centers.

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Introduction: Socioeconomic status (SES) is recognized as an important determinant of kidney health. We aimed to evaluate the association of social deprivation with different indicators at kidney replacement therapy (KRT) initiation in the French pediatric metropolitan population.

Methods: All patients with end-stage kidney disease (ESKD) who started KRT before 20 years old in France between 2002 and 2015 were included.

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Introduction: Tubulointerstitial nephritis (TIN) and uveitis (TINU) syndrome is a rare disease. The renal prognosis is generally thought to be better in children with TINU syndrome than in adults. However, data are scarce.

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  • The paper investigates how CTNS mutations and cysteamine therapy affect human osteoclasts, focusing on bone complications in cystinosis patients.
  • It involved 17 mainly pediatric patients, examining their blood cells to see how well they differentiate into osteoclasts when treated with various cysteamine doses.
  • Findings reveal that patients with different CTNS mutations show distinct osteoclast differentiation patterns, and high doses of cysteamine negatively influence this process across all mutation types.
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Introduction: Guidelines for the treatment of steroid-dependent nephrotic syndrome (SDNS) and frequently relapsing nephrotic syndrome (FRNS) are lacking. Given the substantial impact of SDNS/FRNS on quality of life, strategies aiming to provide long-term remission while minimising treatment side effects are needed. Several studies confirm that rituximab is effective in preventing early relapses in SDNS/FRNS; however, the long-term relapse rate remains high (~70% at 2 years).

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Background: Temocillin is a carboxypenicillin antibiotic indicated in complicated urinary tract infections due to susceptible ESBL-producing Enterobacteriaceae. While temocillin therapeutic schemes for adult patients with normal or impaired renal function are evidence based, little is known in paediatric populations.

Objectives: We report herein the management of temocillin treatment in a preterm infant with end-stage renal disease.

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The specific treatment of idiopathic nephrotic syndrome is based on corticosteroid therapy and/or steroid-sparing immunosuppressive agents in children who are steroid-dependant or frequent relapsers (60-70 %). Patients have an increased infectious risk not only related to the disease during relapses (hypogammaglobulinemia and urinary leakage of opsonins) but also to treatments (corticosteroids or immunosuppressive agents) in period of remission. Vaccination is therefore particularly recommended in these patients.

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Background: The use of citrate in chronic hemodialysis to acidify dialysis solutions, in replacement of acetate, began in the 2000's. The purpose of the following study is to determine whether this change represents a better alternative regarding short-term tolerance, efficiency and biocompatibility of chronic renal replacement therapy (RRT) in pediatric patients.

Methods: A monocentric prospective observational study was conducted in the pediatric dialysis department of Nancy (France) between December 1st, 2014 and January 25, 2015 on a cohort of pediatric patients under predilution on-line hemodiafiltration (olHDF).

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The prevalence of neurological involvement in patients with a deletion of or a variant in the HNF1B gene remains discussed. The aim of this study was to investigate the neuropsychological outcomes in a large cohort of children carrying either a HNF1B whole-gene deletion or a disease-associated variant, revealed by the presence of kidney anomalies. The neuropsychological development-based on school level-of 223 children included in this prospective cohort was studied.

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  • This study examines the quality of life of adolescents starting haemodialysis, aiming to identify factors influencing it and the role of coping strategies.
  • It includes 32 participants with a mean age of 13.9, revealing that their quality of life is notably lower in leisure activities and overall energy compared to matched peers.
  • Active coping strategies were linked to better quality of life outcomes, while avoidant and negative coping methods correlated with poorer emotional and physical well-being, highlighting the need for healthcare professionals to focus on these aspects in treatment.
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  • The study examines the timing of dialysis initiation in children with end-stage kidney disease (ESKD) to understand its impact on clinical outcomes, focusing on a cohort of 2,963 children from 21 European countries.
  • There are two groups analyzed based on estimated glomerular filtration rate (eGFR) at the start of dialysis: early starters (eGFR ≥8 mL/min/1.73 m²) and late starters (eGFR <8 mL/min/1.73 m²), with no significant differences found in survival or access to transplantation between the two.
  • The results indicate that starting dialysis early does not provide significant clinical benefits; however, attention should be given to cardiovascular risk factors like hypertension when
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Background: Despite major technical improvements in the care of children requiring renal replacement therapy (RRT) before 2 years of age, the management of those patients remains challenging and transplantation is generally delayed until the child weighs 10 kg or is 2 years old. In this national cohort study, we studied patient and graft survival in children starting RRT before 2 years of age to help clinicians and parents when deciding on RRT initiation and transplantation management.

Methods: All children starting RRT before 24 months of age between 1992 and 2012 in France were included through the national Renal Epidemiology and Information Network (REIN) registry.

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Background And Objectives: Mutations in the gene, located on the X chromosome, have been recently detected in males with a transient form of antenatal Bartter syndrome or with idiopathic polyhydramnios. The aim of this study is to analyze the proportion of the population with mutations in this gene in a French cohort of patients with antenatal Bartter syndrome.

Design, Setting, Participants, & Measurements: The French cohort of patients with antenatal Bartter syndrome encompasses 171 families.

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Bartter syndrome type 3 is a clinically heterogeneous hereditary salt-losing tubulopathy caused by mutations of the chloride voltage-gated channel Kb gene (), which encodes the ClC-Kb chloride channel involved in NaCl reabsorption in the renal tubule. To study phenotype/genotype correlations, we performed genetic analyses by direct sequencing and multiplex ligation-dependent probe amplification and retrospectively analyzed medical charts for 115 patients with mutations. Functional analyses were performed in oocytes for eight missense and two nonsense mutations.

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Background: Peritoneal dialysis (PD) remains the modality of choice in children, but there is no clear evidence to support a better outcome in children treated with PD. We aimed to assess factors that have an impact on the choice of dialysis modality in children and young adults in France and sought to determine the roles of medical factors and center practices.

Methods: We included all patients aged <20 years at the start of renal replacement therapy (RRT), recorded in the French RRT Registry between 2002 and 2013.

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