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1. The genetic landscape and clinical spectrum of nephronophthisis and related ciliopathies

Author

Friederike Petzold, Katy Billot, Xiaoyi Chen, Charline Henry, Emilie Filhol, Yoann Martin, Marina Avramescu, Maxime Douillet, Vincent Morinière, Pauline Krug, Cécile Jeanpierre, Kalman Tory, Olivia Boyer, Anita Burgun, Aude Servais, Remi Salomon, Alexandre Benmerah, Laurence Heidet, Nicolas Garcelon, Corinne Antignac, Mohamad Zaidan, Sophie Saunier, Tania Attié-Bitach, Valerie Comier-Daire, Jean-Michel Rozet, Yaacov Frishberg, Brigitte Llanas, Michel Broyer, Nabil Mohsin, Marie-Alice Macher, Nicole Philip, Véronique Baudouin, Damian Brackman, Chantal Loirat, Marina Charbit, Maud Dehennault, Claude Guyot, Pierre Bataille, Mariet Elting, Georges Deschenes, Andrea Gropman, Geneviève Guest, Marie-France Gagnadoux, Philippe Nicoud, Pierre Cochat, Bruno Ranchin, Albert Bensman, Anne-Marie Guerrot, Bertrand Knebelmann, Ilmay Bilge, Danièle Bruno, Stéphane Burtey, Caroline Rousset Rouvière, Valérie Caudwell, Denis Morin, Hélène Dollfus, Anne Maisin, Christian Hamel, Eric Bieth, Sophie Gie, Judith Goodship, Gwenaelle Roussey, Hermine La Selve, Hubert Nivet, Lucie Bessenay, Mathilde Caillez, Jean Bernard Palcoux, Stéphane Benoît, Philippe Dubot, Marc Fila, Fabienne Giuliano, Daouya Iftene, Michele Kessler, Theresa Kwon, Anine Lahoche, Audrey Laurent, Anne-Laure Leclerc, David Milford, Thomas Neuhaus, Sylvie Odent, Philippe Eckart, Dominique Chauveau, Patrick Niaudet, Horacio Repetto, Sophie Taque, Alexandra Bruel, Alexandra Noel-Botte, Emma Allain Launay, Lisa Allard, Dany Anlicheau, Anne-Laure Adra, Arnaud Garnier, Arvind Nagra, Remy Baatard, Justine Bacchetta, Banu Sadikoglu, Christine Barnerias, Anne Barthelemy, Lina Basel, Nader Bassilios, Hedi Ben Maiz, Fatma Ben Moussa, Faïza Benmati, Romain Berthaud, Aurélia Bertholet, Dominique Blanchier, Jean Jacques Boffa, Karim Bouchireb, Ihab Bouhabel, Zakaria Boukerroucha, Guylhène Bourdat-Michel, Odile Boute, Karine Brochard, Roseline Caumes, Siham Chafai Elalaoui, Bernard Chamontin, Marie Caroline Chastang, Christine Pietrement, Christine Richer, Christophe Legendre, Karin Dahan, Fabienne Dalla-Vale, Damien Thibaudin, Maxime Dauvergne, Salandre Davourie, Martin Debeukelaer, Jean Daniel Delbet, Constantinos Deltas, Denis Graber, Nadège Devillars, Boucar Diouf, Martine Doco Fenzy, Jean-Luc André, Dominique Joly, Alan Fryer, Laetitia Albano, Elisabeth Cassuto, Aline Pincon, Ana Medeira, Annabelle Chaussenot, Anne Mensire-Marinier, Francois Bouissou, Stephane Decramer, Armand Bottani, Aurélie Hummel, Alexandre Karras, Avi Katz, Christine Azema, Bénédicte Janbon, Bernard Roussel, Claude Bonniol, Christiophe Mariat, Gérard Champion, Deborah Chantreuil, Nicolas Chassaing, Christiane Mousson, Christine Baudeau, Delphine Hafdar Cuntz, Cyril Mignot, Laurene Dehoux, Didier Lacombe, Thierry Hannedouche, Elodie Mérieau, Emmanuelle Charlin, Eric Gauthier, Florent Plasse, Stanislas Faguer, Fanny Lebas, Florence Demurger, Francesco Emma, François Cartault, Geneviève Dumont, Nathalie Godefroid, Vincent Guigonis, Sophie Hillaire, Jaap Groothoff, Jan Dudley, Noémie Jourde-Chiche, Khalil El Karoui, Saoussen Krid, Krier Coudert, Larbi Bencheick, Laurent Yver, Marie-Pierre Lavocat, Le Monies De Sagazan, Valerie Leroy, Lise Thibaudin, Liz Ingulli, Lorraine Gwanmesia, Lydie Burglen, Marie-Hélène Saïd-Menthon, Marta Carrera, Mathilde Nizon, Catherine Melander, Michel Foulard, Monique Blayo, Jacques Prinseau, Nadine Jay, Nathalie Brun, Nicolas Camille, François Nobili, Olivier Devuyst, Ouafa Ben Brahim, Paloma Parvex, Laurence Perrin Sabourin, Philippe Blanc, Philippe Vanhille, Pierre Galichon, Sophie Pierrepont, Vincent Planquois, Gwenaelle Poussard, Claire Pouteil Noble, Radia Allal, Raphaelle Bernard, Raynaud Mounet, Rémi Cahen, Renaud Touraine, Claire Rigothier, Amélie Ryckewaert, Mathieu Sacquepee, Salima El Chehadeh, Charlotte Samaille, Shuman Haq, Ari Simckes, Stéphanie Lanoiselée, Stephanie Tellier, Jean-François Subra, Sylvie Cloarec, Julie Tenenbam, Thomas Lamy, Valérie Drouin Garraud, Huguette Valette, Vanina Meyssonnier, Rosa Vargas-Poussou, Yves Snajer, Sandrine Durault, Emmanuelle Plaisier, Etienne Berard, Fadi Fakhouri, Ferielle Louillet, Paul Finielz, Michel Fischbach, Bernard Foliguet, Hélène Francois-Pradier, Florentine Garaix, Marion Gerard, Gianfranco Rizzoni, Brigitte Gilbert, Denis Glotz, Astrid Godron Dubrasquet, Jean-Pierre Grünfeld, Guillaume Bollee, Michelle Hall, Sverker Hansson, Damien Haye, Hélène Taffin, Friedhelm Hildebrandt, Maryvonne Hourmand, Hümya Kayserili, Ivan Tack, Marie Line Jacquemont, Jennifer Fabre-Teste, Cliff Kashtan, Kkoen Van Hoeck, Alexandre Klein, Yannick Knefati, Nine Knoers, Martin Konrad, Alain Lachaux, Isabelle Landru, Gilbert Landthaler, Philippe Lang, Patrick Le Pogamp, Tristan Legris, Catherine Didailler, Thierry Lobbedez, Loïc de Parscau, Lucile Pinson, Hervé Maheut, Marc Duval-Arnould, Marlène Rio, Marie-Claire Gubler, Pierre Merville, Guillaume Mestrallet, Maite Meunier, Karine Moreau, Jérôme Harambat, Graeme Morgan, Georges Mourad, Niksic Stuber, Odile Boespflug-Tanguy, Olivier Dunand, Olivier Niel, Nacera Ouali, Paolo Malvezzi, Pauline Abou Jaoude, Solenne Pelletier, Julie Peltier, M.B. Petersen, Philippe Michel, Philippe Rémy, Jean-Baptiste Philit, Valérie Pichault, Thierry Billette de Villemeur, Bernard Boudailliez, Bruno Leheup, Claire Dossier, Djamal-Dine Djeddi, Yves Berland, Bruno Hurault de Ligny, Susan Rigden, Christophe Robino, Annick Rossi, Sabine Sarnacki, Messaoud Saidani, Albane Brodin Sartorius, Elise Schäfer, Sztriha Laszlo, Marie-Christine Thouret, Angélique Thuillier-Lecouf, Howard Trachtman, Claire Trivin, Michel Tsimaratos, Rita Van Damme-Lombaerts, Marjolaine Willems, Michel Youssef, Ariane Zaloszyc, Alexis Zawodnik, and Marie-Julia Ziliotis

Subjects
Nephrology
Abstract

Nephronophthisis (NPH) is an autosomal-recessive ciliopathy representing one of the most frequent causes of kidney failure in childhood characterized by a broad clinical and genetic heterogeneity. Applied to one of the worldwide largest cohorts of patients with NPH, genetic analysis encompassing targeted and whole exome sequencing identified disease-causing variants in 600 patients from 496 families with a detection rate of 71%. Of 788 pathogenic variants, 40 known ciliopathy genes were identified. However, the majority of patients (53%) bore biallelic pathogenic variants in NPHP1. NPH-causing gene alterations affected all ciliary modules defined by structural and/or functional subdomains. Seventy six percent of these patients had progressed to kidney failure, of which 18% had an infantile form (under five years) and harbored variants affecting the Inversin compartment or intraflagellar transport complex A. Forty eight percent of patients showed a juvenile (5-15 years) and 34% a late-onset disease (over 15 years), the latter mostly carrying variants belonging to the Transition Zone module. Furthermore, while more than 85% of patients with an infantile form presented with extra-kidney manifestations, it only concerned half of juvenile and late onset cases. Eye involvement represented a predominant feature, followed by cerebellar hypoplasia and other brain abnormalities, liver and skeletal defects. The phenotypic variability was in a large part associated with mutation types, genes and corresponding ciliary modules with hypomorphic variants in ciliary genes playing a role in early steps of ciliogenesis associated with juvenile-to-late onset NPH forms. Thus, our data confirm a considerable proportion of late-onset NPH suggesting an underdiagnosis in adult chronic kidney disease.

Published
2023
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2. Pediatr Nephrol

Author

Josselin Bernard, Alexandra Bruel, Fanny Lalieve, Jérôme Harambat, Mathilde Caillez, Olivia Boyer, Astrid Godron-Dubrasquet, Emma Allain-Launay, Julie Sarlat, Justine Perrin, Laurène Dehoux, Jacques Dantal, Stéphane Decramer, Gwenaelle Roussey, Bordeaux population health (BPH), and Université de Bordeaux (UB)-Institut de Santé Publique, d'Épidémiologie et de Développement (ISPED)-Institut National de la Santé et de la Recherche Médicale (INSERM)

Subjects
Male, medicine.medical_specialty, Nephrotic Syndrome, Adolescent, 030232 urology & nephrology, Disease, 030204 cardiovascular system & hematology, Antibodies, Monoclonal, Humanized, Ofatumumab, LEHA, 03 medical and health sciences, chemistry.chemical_compound, 0302 clinical medicine, Refractory, Recurrence, Internal medicine, medicine, Humans, Child, Retrospective Studies, Proteinuria, business.industry, Medical record, Complete remission, medicine.disease, Kidney Transplantation, 3. Good health, Transplantation, Treatment Outcome, chemistry, Nephrology, Pediatrics, Perinatology and Child Health, Female, [SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie, medicine.symptom, business, Nephrotic syndrome, Immunosuppressive Agents
Abstract

Background Relapsing nephrotic syndrome (NS) after transplantation can be a challenge to treat. The result of the consequent long-lasting proteinuria is the loss of the graft. Disease recurrence after renal transplantation occurs in around half of cases, and the efficacy of therapeutic strategies is often limited. Recently, ofatumumab, a second-generation and fully human anti-CD20 monoclonal antibody, has been shown to be effective in severe situations. Methods We retrospectively collected data from the medical records of children with recurrence of NS after renal transplantation treated with ofatumumab in France, after failure of previous treatments. Results Six patients were included in this study in five centers with a median duration of follow-up of 10.5 months. Two different ofatumumab regimens were administered. The primary outcome was proteinuria at 6 months after the last dose of ofatumumab. No patient achieved a complete remission, 3/6 had a partial remission, and 3/6 had no response to ofatumumab. Four patients exhibited a minor allergic reaction with the first infusion. One patient died of infection, as a consequence of multiple factors. No malignancies were observed; however, the time of follow-up was not sufficient to see such disease. Conclusions Altogether, these results suggest ofatumumab has a poor efficacy in treating recurrence of NS after renal transplantation. However, it could be discussed in multidrug-resistant refractory NS, but infectious complications and overimmunosuppression have to be balanced. There is a need for further studies to confirm these findings and safety and to determine a standardized protocol in this indication.

Published
2020
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3. Phenotype-genotype correlation in antenatal and neonatal variants of Bartter syndrome

Author

Chantal Loirat, Olivia Boyer, Georges Deschênes, Mathilde Caillez, Anne Blanchard, Robert Novo, Rosa Vargas-Poussou, Patrick Niaudet, Pierre Cochat, Stéphane Decramer, Claude Guyot, Albert Bensman, Marie-Alice Macher, Karine Brochard, Xavier Jeunemaitre, Françoise Broux, and Denis Morin

Subjects
Male, Polyhydramnios, medicine.medical_specialty, Adolescent, Genotype, Turkey, Sodium-Potassium-Chloride Symporters, Deafness, Bartter syndrome, Gastroenterology, White People, Tubulopathy, Africa, Northern, Chloride Channels, Internal medicine, medicine, Humans, Africa, Central, Potassium Channels, Inwardly Rectifying, Child, Retrospective Studies, Solute Carrier Family 12, Member 1, Transplantation, CLCNKB, biology, business.industry, Bartter Syndrome, Infant, medicine.disease, Hypokalemia, Bartter's syndrome, Nephrocalcinosis, Endocrinology, Phenotype, Nephrology, Child, Preschool, Mutation, biology.protein, Hyperkalemia, Female, medicine.symptom, business, Kidney disease, Follow-Up Studies
Abstract

Background Ante/neonatal Bartter syndrome (BS) is a hereditary salt-losing tubulopathy due to mutations in genes encoding proteins involved in NaCl reabsorption in the thick ascending limb of Henle's loop. Our aim was to study the frequency, clinical characteristics and outcome of each genetic subtype. Methods Charts of 42 children with mutations in KCNJ1 (n = 19), SLC12A1 (n = 13) CLCNKB (n = 6) or BSND (n = 4) were retrospectively analysed. The median follow-up was 8.3 [0.4-18.0] years. Results We describe 24 new mutations: 10 in KCNJ1, 11 in SLC12A1 and 3 in CLCNKB. The onset of polyhydramnios, birth term, height and weight were similar for all groups; three patients had no history of polyhydramnios or premature birth and had CLCNKB mutations according to a less severe renal sodium wasting. Contrasting with these data, patients with CLCNKB had the lowest potassium (P = 0.006 versus KCNJ1 and P = 0.034 versus SLC12A1) and chloride plasma concentrations (P = 0.039 versus KCNJ1 and P = 0.024 versus SLC12A1) and the highest bicarbonataemia (P = 0.026 versus KCNJ1 and P = 0.014 versus SLC12A1). Deafness at diagnosis was constant in patients with BSND mutations; transient neonatal hyperkalaemia was present in two-thirds of the children with KCNJ1 mutations. Nephrocalcinosis was constant in KCNJ1 and SLC12A1 but not in BSND and CLCNKB patients. In most cases, water/electrolyte supplementation + indomethacin led to catch-up growth. Three patients developed chronic renal failure: one with KCNJ1 mutations during the second decade of age and two with CLCNKB and BSND mutations and without nephrocalcinosis during the first year of life. Conclusions We confirmed in a large cohort of ante/ neonatal BS that deafness, transient hyperkalaemia and severe hypokalaemic hypochloraemic alkalosis orientate molecular investigations to BSND, KCNJ1 and CLCNKB genes, respectively. Chronic renal failure is a rare event, associated in this cohort with three genotypes and not always associated with nephrocalcinosis.

Published
2008

4. Macrophage Activation Syndrome Mimicking Life-Threatening Infection in a Patient With Variable Immunodeficiency, Centromeric Instability, and Facial Anomalies

Author

Bertrand Roquelaure, Marianne Chrestian, Nicolas André, Carla Blanco-Betancourt, Mathilde Caillez, Claudine Schiff, and Anne Moncla

Subjects
business.industry, Common variable immunodeficiency, Disease, medicine.disease, Sepsis, Macrophage activation syndrome, Pediatrics, Perinatology and Child Health, Immunology, Medicine, Respiratory system, Differential diagnosis, business, Complication, human activities, Immunodeficiency
Abstract

To the Editor .— ICF syndrome is a rare autosomal recessive disease characterized by variable immunodeficiency, centromeric instability, and facial anomalies.1,2 In most ICF cases reported, mutations in the DNA methyltransferase 3B gene are implicated.1,2 Negative selection breakdown and peripheral B cell maturation blockage contribute to agammaglobulinemia in ICF syndrome.3 The consequences of immunodepression are a higher frequency of infections such as recurrent and prolonged respiratory infections and infections of the skin and digestive system, which can be frequently lethal, leading to premature death of affected patients.4 Macrophage activation syndrome (MAS) is a serious complication …

Published
2004
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5. Phenotype-genotype correlation in antenatal and neonatal variants of Bartter syndrome.

Author

Karine Brochard, Olivia Boyer, Anne Blanchard, Chantal Loirat, Patrick Niaudet, Marie-Alice Macher, Georges Deschenes, Albert Bensman, Stéphane Decramer, Pierre Cochat, Denis Morin, Françoise Broux, Mathilde Caillez, Claude Guyot, Robert Novo, Xavier Jeunemaître, and Rosa Vargas-Poussou

Subjects
BARTTER syndrome, PHENOTYPES, NEONATAL diseases, STATISTICAL correlation, BIOLOGICAL variation, GENETIC mutation, KIDNEY calcification, GENETICS
Abstract

Background. Ante/neonatal Bartter syndrome (BS) is a hereditary salt-losing tubulopathy due to mutations in genes encoding proteins involved in NaCl reabsorption in the thick ascending limb of Henles loop. Our aim was to study the frequency, clinical characteristics and outcome of each genetic subtype. Methods. Charts of 42 children with mutations in KCNJ1 (n = 19), SLC12A1 (n = 13) CLCNKB (n = 6) or BSND (n = 4) were retrospectively analysed. The median follow-up was 8.3 [0.4–18.0] years. Results. We describe 24 new mutations: 10 in KCNJ1, 11 in SLC12A1 and 3 in CLCNKB. The onset of polyhydramnios, birth term, height and weight were similar for all groups; three patients had no history of polyhydramnios or premature birth and had CLCNKB mutations according to a less severe renal sodium wasting. Contrasting with these data, patients with CLCNKB had the lowest potassium (P = 0.006 versus KCNJ1 and P = 0.034 versus SLC12A1) and chloride plasma concentrations (P = 0.039 versus KCNJ1 and P = 0.024 versus SLC12A1) and the highest bicarbonataemia (P = 0.026 versus KCNJ1 and P = 0.014 versus SLC12A1). Deafness at diagnosis was constant in patients with BSND mutations; transient neonatal hyperkalaemia was present in two-thirds of the children with KCNJ1 mutations. Nephrocalcinosis was constant in KCNJ1 and SLC12A1 but not in BSND and CLCNKB patients. In most cases, water/electrolyte supplementation + indomethacin led to catch-up growth. Three patients developed chronic renal failure: one with KCNJ1 mutations during the second decade of age and two with CLCNKB and BSND mutations and without nephrocalcinosis during the first year of life. Conclusions. We confirmed in a large cohort of ante/ neonatal BS that deafness, transient hyperkalaemia and severe hypokalaemic hypochloraemic alkalosis orientate molecular investigations to BSND, KCNJ1 and CLCNKB genes, respectively. Chronic renal failure is a rare event, associated in this cohort with three genotypes and not always associated with nephrocalcinosis. [ABSTRACT FROM AUTHOR]

Published
2009
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