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Demaret T, Wintjens R, Sana G, Docquir J, Bertin F, Ide C, Monestier O, Karadurmus D, Benoit V, Maystadt I. Case Report: Inactivating PTH/PTHrP Signaling Disorder Type 1 Presenting With PTH Resistance. Front Endocrinol (Lausanne) 2022; 13:928284. [PMID: 35846276 PMCID: PMC9280615 DOI: 10.3389/fendo.2022.928284] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 05/31/2022] [Indexed: 11/21/2022] Open
Abstract
PTH resistance is characterized by elevated parathyroid hormone (PTH) levels, hypocalcemia, hyperphosphatemia and it is classically associated with GNAS locus genetic or epigenetic defects. Inactivating PTH/PTHrP signaling disorders (iPPSD) define overlapping phenotypes based on their molecular etiology. iPPSD1 is associated with PTH1R variants and variable phenotypes including ossification anomalies and primary failure of tooth eruption but no endocrine disorder. Here we report on a 10-month-old child born from consanguineous parents, who presented with mild neurodevelopmental delay, seizures, enlarged fontanelles, round face, and bilateral clinodactyly. Hand x-rays showed diffuse delayed bone age, osteopenia, short metacarpal bones and cone-shaped distal phalanges. A diagnosis of PTH resistance was made on the basis of severe hypocalcemia, hyperphosphatemia, elevated PTH and normal vitamin D levels on blood sample. The patient was treated with calcium carbonate and alfacalcidol leading to rapid bio-clinical improvement. Follow-up revealed multiple agenesis of primary teeth and delayed teeth eruption, as well as Arnold-Chiari type 1 malformation requiring a ventriculoperitoneal shunt placement. GNAS gene analysis showed no pathogenic variation, but a likely pathogenic homozygous substitution c.723C>G p.(Asp241Glu) in PTH1R gene was found by trio-based whole exome sequencing. We studied the deleterious impact of the variant on the protein conformation with bioinformatics tools. In conclusion, our study reports for the first time PTH resistance in a child with a biallelic PTH1R mutation, extending thereby the clinical spectrum of iPPSD1 phenotypes.
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Affiliation(s)
- Tanguy Demaret
- Centre de Génétique Humaine, Institut de Pathologie et Génétique (IPG), Gosselies, Belgium
- *Correspondence: Tanguy Demaret,
| | - René Wintjens
- Unité Microbiologie, Chimie Bioorganique et Macromoléculaire (CP206/04), Institut de Pharmacie, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Gwenaelle Sana
- Service de Pédiatrie, Grand Hôpital de Charleroi (GHdC), Charleroi, Belgium
| | - Joachim Docquir
- Service de Pédiatrie, Grand Hôpital de Charleroi (GHdC), Charleroi, Belgium
| | - Frederic Bertin
- Service de Radiologie, Grand Hôpital de Charleroi (GHdC), Charleroi, Belgium
| | - Christophe Ide
- Service de Radiologie, Grand Hôpital de Charleroi (GHdC), Charleroi, Belgium
| | - Olivier Monestier
- Centre de Génétique Humaine, Institut de Pathologie et Génétique (IPG), Gosselies, Belgium
| | - Deniz Karadurmus
- Centre de Génétique Humaine, Institut de Pathologie et Génétique (IPG), Gosselies, Belgium
| | - Valerie Benoit
- Centre de Génétique Humaine, Institut de Pathologie et Génétique (IPG), Gosselies, Belgium
| | - Isabelle Maystadt
- Centre de Génétique Humaine, Institut de Pathologie et Génétique (IPG), Gosselies, Belgium
- Département de Médecine, Unité de Recherche en Physiologie Moléculaire (URPhyM), Université de Namur (UNamur), Namur, Belgium
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Sana G, Dragon-Durey M, Bouchireb K, Charbit M, Rousset-Rouvière C, Bérard E, Frémeaux-Bacchi V, Niaudet P, Salomon R, Boyer O. SFRP CO-07 – Syndrome hémolytique et urémique atypique à anticorps anti-facteur H : Efficacité du cyclophosphamide. Arch Pediatr 2014. [DOI: 10.1016/s0929-693x(14)72245-6] [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: 11/12/2022]
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Stéphenne X, Debray FG, Smets F, Jazouli N, Sana G, Tondreau T, Menten R, Goffette P, Boemer F, Schoos R, Gersting SW, Najimi M, Muntau AC, Goyens P, Sokal EM. Hepatocyte Transplantation Using the Domino Concept in a Child with Tetrabiopterin Nonresponsive Phenylketonuria. Cell Transplant 2012; 21:2765-70. [DOI: 10.3727/096368912x653255] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Phenylketonuria is a metabolic disease caused by phenylalanine hydroxylase deficiency. Treatment is based on a strict natural protein-restricted diet that is associated with the risk of malnutrition and severe psychosocial burden. Oral administration of tetrahydrobiopterin can increase residual enzyme activity, but most patients with severe clinical phenotypes are nonresponders. We performed liver cell transplantation in a 6-year-old boy with severe tetrahydrobiopterin nonresponsive phenylketonuria who failed to comply with diet prescriptions. The transplanted hepatocytes were obtained in part from an explanted glycogen storage type 1b liver. Following two infusions, blood phenylalanine levels returned within the therapeutic target while the phenylalanine half-life assessed by loading tests decreased from 43 to 19 h. However, 3 months later, blood phenylalanine concentrations increased and the phenylalanine intake had to be reduced. Cell-based therapy is a promising therapeutic option in phenylketonuria, and the domino concept may solve the issue of cell sources for hepatocyte transplantation.
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Affiliation(s)
- X. Stéphenne
- Université Catholique de Louvain, Cliniques Universitaires St Luc, Service de Gastroentérologie et Hépatologie Pédiatrique, Banque D'hépatocytes, Bruxelles, Belgium
- Université Catholique de Louvain, Institut de Recherche Expérimentale et Clinique (IREC), Laboratoire D'hépatologie Pédiatrique & Thérapie Cellulaire, Brussels, Belgium
| | - F. G. Debray
- CHU & Université de Liège, Centre de Génétique Humaine, Liège, Belgium
| | - F. Smets
- Université Catholique de Louvain, Cliniques Universitaires St Luc, Service de Gastroentérologie et Hépatologie Pédiatrique, Banque D'hépatocytes, Bruxelles, Belgium
- Université Catholique de Louvain, Institut de Recherche Expérimentale et Clinique (IREC), Laboratoire D'hépatologie Pédiatrique & Thérapie Cellulaire, Brussels, Belgium
| | - N. Jazouli
- Université Catholique de Louvain, Cliniques Universitaires St Luc, Service de Gastroentérologie et Hépatologie Pédiatrique, Banque D'hépatocytes, Bruxelles, Belgium
- Université Catholique de Louvain, Institut de Recherche Expérimentale et Clinique (IREC), Laboratoire D'hépatologie Pédiatrique & Thérapie Cellulaire, Brussels, Belgium
| | - G. Sana
- Université Catholique de Louvain, Cliniques Universitaires St Luc, Service de Gastroentérologie et Hépatologie Pédiatrique, Banque D'hépatocytes, Bruxelles, Belgium
- Université Catholique de Louvain, Institut de Recherche Expérimentale et Clinique (IREC), Laboratoire D'hépatologie Pédiatrique & Thérapie Cellulaire, Brussels, Belgium
| | - T. Tondreau
- Université Catholique de Louvain, Cliniques Universitaires St Luc, Service de Gastroentérologie et Hépatologie Pédiatrique, Banque D'hépatocytes, Bruxelles, Belgium
- Université Catholique de Louvain, Institut de Recherche Expérimentale et Clinique (IREC), Laboratoire D'hépatologie Pédiatrique & Thérapie Cellulaire, Brussels, Belgium
| | - R. Menten
- Université Catholique de Louvain, Cliniques Universitaires St Luc, Unité de Radiologie Pédiatrique, Bruxelles, Belgium
| | - P. Goffette
- Université Catholique de Louvain, Cliniques Universitaires St Luc, Unité de Radiologie Pédiatrique, Bruxelles, Belgium
| | - F. Boemer
- CHU & Université de Liège, Genetic Biochemistry Laboratory, Liège, Belgium
| | - R. Schoos
- CHU & Université de Liège, Genetic Biochemistry Laboratory, Liège, Belgium
| | - S. W. Gersting
- Dr. von Hauner Children's Hospital, Division of Molecular Pediatrics, Munich, Germany
| | - M. Najimi
- Université Catholique de Louvain, Institut de Recherche Expérimentale et Clinique (IREC), Laboratoire D'hépatologie Pédiatrique & Thérapie Cellulaire, Brussels, Belgium
| | - A. C. Muntau
- Dr. von Hauner Children's Hospital, Division of Molecular Pediatrics, Munich, Germany
| | - P. Goyens
- Université Libre de Bruxelles, Unité de Nutrition et Métabolisme & Laboratoire de Pédiatrie, Bruxelles, Belgium
| | - E. M. Sokal
- Université Catholique de Louvain, Cliniques Universitaires St Luc, Service de Gastroentérologie et Hépatologie Pédiatrique, Banque D'hépatocytes, Bruxelles, Belgium
- Université Catholique de Louvain, Institut de Recherche Expérimentale et Clinique (IREC), Laboratoire D'hépatologie Pédiatrique & Thérapie Cellulaire, Brussels, Belgium
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Vosters O, Lombard C, André F, Sana G, Sokal EM, Smets F. The interferon-alpha and interleukin-10 responses in neonates differ from adults, and their production remains partial throughout the first 18 months of life. Clin Exp Immunol 2010; 162:494-9. [PMID: 20964643 DOI: 10.1111/j.1365-2249.2010.04267.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Previous studies have suggested that the susceptibility of newborns to infections is linked to the immaturity of their immune system, but very few data are available on the early stages of maturation of the immune response. Therefore, we decided to investigate the evolution of the interferon (IFN)-α and interleukin (IL)-10 responses in neonatal mononuclear cells. To this end, mononuclear cells isolated from cord blood and peripheral blood of 2-, 6- and 18-month-old children and adults were stimulated with unmethylated cytosine-phosphate-guanosine oligodeoxynucleotide (CpG-ODN) 2216 (IFN-α response) or lipopolysaccharide (LPS) (IL-10 response) for 24 h. The production of IFN-α and IL-10 was then measured in culture supernatants using enzyme-linked immunosorbent assay (ELISA) or a 6-plex cytokine array, respectively. Compared to adults, we found a significant impairment in both the IFN-α and IL-10 responses of neonatal mononuclear cells. Interestingly, both responses had increased significantly after 2 months, but remained lower than the adult responses throughout the first 18 months of life. This study shows that although the immune response of neonates tends to mature fairly quickly, it remains different when compared to the adult immune response throughout the first 18 months of life. This could have important consequences on children's ability to mount an appropriate immune response to various challenges and to establish tolerance and immune homeostasis.
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Affiliation(s)
- O Vosters
- Université catholique de Louvain and Cliniques Universitaires Saint-Luc, Laboratory of Pediatric Hepatology and Cell Therapy, PEDI Unit, Brussels, Belgium
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