Clinical spectrum of MTOR-related hypomelanosis of Ito with neurodevelopmental abnormalities
Autor: | Yannis Duffourd, Catherine Sarret, B. Catteau, Rachel G. Knox, Chloé Quélin, Cyril Mignot, Martin Chevarin, P. Callier, Diana Rodriguez, Alexis Arzimanoglou, Robert Olaso, David Geneviève, Arthur Sorlin, Sylvie Odent, Christel Thauvin, Victoria E. R. Parker, Pierre Vabres, Louise Goujon, Malika Keddar, Melissa Riachi, Sylvie Fraitag, Laurence Faivre, Emmanuelle Blanchard, Satyamaanasa Polubothu, Marie-Line Jacquemont, Jean-Baptiste Rivière, Anne Boland, Jean-François Deleuze, Paul Rollier, Véronique Darmency, Marie-Hélène Aubriot-Lorton, Yline Capri, V. Carmignac, Daniel Amram, Catherine Vincent-Delorme, Paul Kuentz, Marc Delepine, Didier Bessis, Robert K. Semple, Sarah Grotto, Veronica A. Kinsler, Laurent Guibaud, Christophe Philippe, Jean-Benoît Courcet |
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Přispěvatelé: | Apollo - University of Cambridge Repository, Lipides - Nutrition - Cancer [Dijon - U1231] (LNC), Université de Bourgogne (UB)-Institut National de la Santé et de la Recherche Médicale (INSERM)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, CHU Trousseau [APHP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), CHU Pitié-Salpêtrière [AP-HP], Centre Hospitalier Régional Universitaire de Tours (CHRU Tours), Morphogénèse et antigénicité du VIH et du virus des Hépatites (MAVIVH - U1259 Inserm - CHRU Tours ), Centre Hospitalier Régional Universitaire de Tours (CHRU Tours)-Université de Tours (UT)-Institut National de la Santé et de la Recherche Médicale (INSERM), FHU TRANSLAD (CHU de Dijon), Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon), University of Cambridge [UK] (CAM), CHU Necker - Enfants Malades [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Great Ormond Street Hospital for Children [London] (GOSH), University College of London [London] (UCL), Institut de Génomique d'Evry (IG), Université Paris-Saclay-Institut de Biologie François JACOB (JACOB), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), CHU Pontchaillou [Rennes], AP-HP Hôpital universitaire Robert-Debré [Paris], Centre Hospitalier Universitaire de La Réunion (CHU La Réunion), CHI Créteil, Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), Hospices Civils de Lyon (HCL), Centre de recherche en neurosciences de Lyon - Lyon Neuroscience Research Center (CRNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut Pascal (IP), Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA)-Institut national polytechnique Clermont Auvergne (INP Clermont Auvergne), Université Clermont Auvergne (UCA)-Université Clermont Auvergne (UCA), CHU Clermont-Ferrand, Centre Hospitalier Régional Universitaire [Montpellier] (CHRU Montpellier), Pathogenesis and Control of Chronic and Emerging Infections (PCCEI), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Montpellier (UM)-Université des Antilles (UA)-Etablissement français du don du sang [Montpellier], Cellules Souches, Plasticité Cellulaire, Médecine Régénératrice et Immunothérapies (IRMB), Centre Hospitalier Régional Universitaire [Montpellier] (CHRU Montpellier)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Montpellier (UM), Hôpital d'Enfants [CHU Dijon], Hôpital du Bocage, Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon)-Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon), University of Edinburgh, BOHAUD, FRANCOISE |
Rok vydání: | 2021 |
Předmět: |
0301 basic medicine
Pathology medicine.medical_specialty [SDV.GEN.GH] Life Sciences [q-bio]/Genetics/Human genetics Melanocyte Mechanistic Target of Rapamycin Complex 1 Article 03 medical and health sciences Tuberous sclerosis Epilepsy 0302 clinical medicine medicine Humans [SDV.NEU] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC] Megalencephaly Genetics (clinical) PI3K/AKT/mTOR pathway Hypopigmentation business.industry Mosaicism TOR Serine-Threonine Kinases Macrocephaly Correction medicine.disease 030104 developmental biology medicine.anatomical_structure Phenotype [SDV.GEN.GH]Life Sciences [q-bio]/Genetics/Human genetics [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC] medicine.symptom business 030217 neurology & neurosurgery Immunostaining |
Zdroj: | Carmignac, V, Mignot, C, Blanchard, E, Kuentz, P, Aubriot-Lorton, M-H, Parker, V E R, Sorlin, A, Fraitag, S, Courcet, J-B, Duffourd, Y, Rodriguez, D, Knox, R G, Polubothu, S, Boland, A, Olaso, R, Delepine, M, Darmency, V, Riachi, M, Quelin, C, Rollier, P, Goujon, L, Grotto, S, Capri, Y, Jacquemont, M-L, Odent, S, Amram, D, Chevarin, M, Vincent-Delorme, C, Catteau, B, Guibaud, L, Arzimanoglou, A, Keddar, M, Sarret, C, Callier, P, Bessis, D, Geneviève, D, Deleuze, J-F, Thauvin, C, Semple, R K, Philippe, C, Rivière, J-B, Kinsler, V A, Faivre, L & Vabres, P 2021, ' Clinical spectrum of MTOR-related hypomelanosis of Ito with neurodevelopmental abnormalities. ', Genetics in Medicine . https://doi.org/10.1038/s41436-021-01161-6 Genetics in Medicine Genet Med Genetics in Medicine, 2021, 23 (8), pp.1484-1491. ⟨10.1038/s41436-021-01161-6⟩ |
ISSN: | 1098-3600 1530-0366 |
Popis: | Hypomelanosis of Ito (HI) is a skin marker of somatic mosaicism. Mosaic MTOR pathogenic variants have been reported in HI with brain overgrowth. We sought to delineate further the pigmentary skin phenotype and clinical spectrum of neurodevelopmental manifestations of MTOR-related HI. From two cohorts totaling 71 patients with pigmentary mosaicism, we identified 14 patients with Blaschko-linear and one with flag-like pigmentation abnormalities, psychomotor impairment or seizures, and a postzygotic MTOR variant in skin. Patient records, including brain magnetic resonance image (MRI) were reviewed. Immunostaining (n = 3) for melanocyte markers and ultrastructural studies (n = 2) were performed on skin biopsies. MTOR variants were present in skin, but absent from blood in half of cases. In a patient (p.[Glu2419Lys] variant), phosphorylation of p70S6K was constitutively increased. In hypopigmented skin of two patients, we found a decrease in stage 4 melanosomes in melanocytes and keratinocytes. Most patients (80%) had macrocephaly or (hemi)megalencephaly on MRI. MTOR-related HI is a recognizable neurocutaneous phenotype of patterned dyspigmentation, epilepsy, intellectual deficiency, and brain overgrowth, and a distinct subtype of hypomelanosis related to somatic mosaicism. Hypopigmentation may be due to a defect in melanogenesis, through mTORC1 activation, similar to hypochromic patches in tuberous sclerosis complex. |
Databáze: | OpenAIRE |
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