Publications by authors named "L Heidet"

Background: The current development of gynecology services for children and adolescents seeks to meet needs both in the overall population and in patients with rare diseases. In France, the referral center for rare gynecological diseases specializes in four major types of conditions, namely, uterovaginal malformations, hereditary hemorrhagic diseases, rare benign breast diseases, and gynecological repercussions of rare chronic diseases.

Objective: To describe consecutive patients who had a first visit in 2018-2023 at the referral center for rare gynecological diseases at the Necker Pediatric University Hospital in Paris, France, and who were diagnosed with a condition in any of the four categories listed above.

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Rationale & Objective: Molecular diagnosis of autosomal dominant tubulointerstitial kidney disease (ADTKD) due to variants in the MUC1 gene has long been challenging because variants lie in a large variable number of tandem repeat (VNTR) region, making identification impossible using standard short-read techniques. Previously, we addressed this diagnostic limitation by developing a computational pipeline named VNtyper for easier reliable detection of MUC1 VNTR pathogenic variants from short-read sequences. This led to unexpected diagnoses of ADTKD-MUC1 among patients with kidney disease referred for genetic testing, which we report here.

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Glomerular nephropathy resulting from the genetic defects in COL4A3/4/5 genes including the classical Alport syndrome (AS) is the second commonest hereditary kidney disease characterized by persistent haematuria progressing to the need of kidney replacement therapy, frequently associated with sensorineural deafness, and occasionally with ocular anomalies. Diagnosis and management of COL4A3/4/5 glomerulopathy is a great challenge due to its phenotypic heterogeneity, multiple modes of inheritance, variable expressivity, and disease penetrance of individual variants as well as imperfect prognostic and progression factors and scarce and limited clinical trials, especially in children. As a joint initiative of the European Rare Kidney disease reference Network (ERKNet), European Renal Association (ERA Genes&Kidney) and European Society for Paediatric Nephrology (ESPN) Working Group Hereditary Kidney Disorders, a team of experts including adult and paediatric nephrologists, kidney geneticists, audiologists, ophthalmologists and a kidney pathologist were selected to perform a systematic literature review on 21 clinically relevant PICO (Patient or Population covered, Intervention, Comparator, Outcome) questions.

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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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