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Bezen D, Kutlu O, Mouilleron S, Rizzoti K, Dattani M, Guran T, Yeşil G. A homozygous Y443C variant in the RNPC3 is associated with severe syndromic congenital hypopituitarism and diffuse brain atrophy. Am J Med Genet A 2022; 188:2701-2706. [PMID: 35792517 DOI: 10.1002/ajmg.a.62888] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Revised: 06/06/2022] [Accepted: 06/21/2022] [Indexed: 01/25/2023]
Abstract
Biallelic RNPC3 variants have been reported in a few patients with growth hormone deficiency, either in isolation or in association with central hypothyroidism, congenital cataract, neuropathy, developmental delay/intellectual disability, hypogonadism, and pituitary hypoplasia. To describe a new patient with syndromic congenital hypopituitarism and diffuse brain atrophy due to RNPC3 mutations and to compare her clinical and molecular characteristics and pituitary functions with previously published patients. A 20-year-old female presented with severe growth, neuromotor, and developmental delay. Her weight, height, and head circumference were 5135 gr (-25.81 SDS), 68 cm (-16.17 SDS), and 34 cm (-17.03 SDS), respectively. She was prepubertal, and had dysmorphic facies, contractures, and spasticity in the extremities, and severe truncal hypotonia. There were no radiological signs of a skeletal dysplasia. The bone age was extremely delayed at 2 years. Investigation of pituitary function revealed growth hormone, prolactin, and thyroid-stimulating hormone deficiencies. Whole-exome sequencing revealed a novel homozygous missense (c.1328A > G; Y443C) variant in RNPC3. Cranial MRI revealed a hypoplastic anterior pituitary with diffuse cerebral and cerebellar atrophy. The Y443C variant in RNPC3 associated with syndromic congenital hypopituitarism and abnormal brain development. This report extends the RNPC3-related hypopituitarism phenotype with a severe neurodegenerative presentation.
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Affiliation(s)
- Diğdem Bezen
- Department of Pediatrics, Pediatric Endocrinology, University of Health Sciences, Prof. Dr. Cemil Taşçıoğlu City Hospital, Istanbul, Turkey
| | - Orkide Kutlu
- Department of Internal Medicine, University of Health Sciences, Prof. Dr. Cemil Taşçıoğlu City Hospital, Istanbul, Turkey
| | - Stephane Mouilleron
- Structural Biology Science Technology Platforms, The Francis Crick Institute, London, UK
| | - Karine Rizzoti
- Stem Cell Biology and Developmental Genetics Lab, The Francis Crick Institute, London, UK
| | - Mehul Dattani
- Department and Genetics and Genomic Medicine Research and Teaching, UCL GOS Institute of Child Health, London
| | - Tulay Guran
- Department of Pediatric Endocrinology and Diabetes, School of Medicine, Marmara University, Istanbul, Turkey
| | - Gözde Yeşil
- Department of Medical Genetics, Pediatric Genetics, Istanbul Medical Faculty, Istanbul University, Istanbul, Turkey
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Gergics P, Smith C, Bando H, Jorge AAL, Rockstroh-Lippold D, Vishnopolska SA, Castinetti F, Maksutova M, Carvalho LRS, Hoppmann J, Martínez Mayer J, Albarel F, Braslavsky D, Keselman A, Bergadá I, Martí MA, Saveanu A, Barlier A, Abou Jamra R, Guo MH, Dauber A, Nakaguma M, Mendonca BB, Jayakody SN, Ozel AB, Fang Q, Ma Q, Li JZ, Brue T, Pérez Millán MI, Arnhold IJP, Pfaeffle R, Kitzman JO, Camper SA. High-throughput splicing assays identify missense and silent splice-disruptive POU1F1 variants underlying pituitary hormone deficiency. Am J Hum Genet 2021; 108:1526-1539. [PMID: 34270938 DOI: 10.1016/j.ajhg.2021.06.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 06/18/2021] [Indexed: 12/13/2022] Open
Abstract
Pituitary hormone deficiency occurs in ∼1:4,000 live births. Approximately 3% of the cases are due to mutations in the alpha isoform of POU1F1, a pituitary-specific transcriptional activator. We found four separate heterozygous missense variants in unrelated individuals with hypopituitarism that were predicted to affect a minor isoform, POU1F1 beta, which can act as a transcriptional repressor. These variants retain repressor activity, but they shift splicing to favor the expression of the beta isoform, resulting in dominant-negative loss of function. Using a high-throughput splicing reporter assay, we tested 1,070 single-nucleotide variants in POU1F1. We identified 96 splice-disruptive variants, including 14 synonymous variants. In separate cohorts, we found two additional synonymous variants nominated by this screen that co-segregate with hypopituitarism. This study underlines the importance of evaluating the impact of variants on splicing and provides a catalog for interpretation of variants of unknown significance in POU1F1.
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Affiliation(s)
- Peter Gergics
- Department of Human Genetics, University of Michigan, Ann Arbor, MI 48109-5618, USA
| | - Cathy Smith
- Department of Human Genetics, University of Michigan, Ann Arbor, MI 48109-5618, USA; Department of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, MI 48109-2218, USA
| | - Hironori Bando
- Department of Human Genetics, University of Michigan, Ann Arbor, MI 48109-5618, USA
| | - Alexander A L Jorge
- Genetic Endocrinology Unit (LIM25), Division of Endocrinology, Hospital das Clinicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo 01246-903, Brazil
| | - Denise Rockstroh-Lippold
- Department of Women's and Child Health, Division of Pediatric Endocrinology, University Hospital Leipzig, Leipzig 04103, Germany
| | - Sebastian A Vishnopolska
- Instituto de Biociencias, Biotecnología y Biología Traslacional, Departamento de Fisiología, Biología Molecular y Celular, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad de Buenos Aires, CABA CE1428EHA, Argentina
| | - Frederic Castinetti
- Aix Marseille University, AP-HM, INSERM, Marseille Medical Genetics, Marmara Institute, La Conception Hospital, Department of Endocrinology, Marseille 13005, France
| | - Mariam Maksutova
- Department of Human Genetics, University of Michigan, Ann Arbor, MI 48109-5618, USA
| | - Luciani Renata Silveira Carvalho
- Developmental Endocrinology Unit, Laboratory of Hormones and Molecular Genetics LIM/42, Division of Endocrinology, Hospital das Clinicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo 05403-900, Brazil
| | - Julia Hoppmann
- Department of Women's and Child Health, Division of Pediatric Endocrinology, University Hospital Leipzig, Leipzig 04103, Germany
| | - Julián Martínez Mayer
- Instituto de Biociencias, Biotecnología y Biología Traslacional, Departamento de Fisiología, Biología Molecular y Celular, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad de Buenos Aires, CABA CE1428EHA, Argentina
| | - Frédérique Albarel
- Aix Marseille University, AP-HM, INSERM, Marseille Medical Genetics, Marmara Institute, La Conception Hospital, Department of Endocrinology, Marseille 13005, France
| | - Debora Braslavsky
- Centro de Investigaciones Endocrinológicas "Dr. César Bergadá," FEI - CONICET - División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Ciudad de Buenos Aires, CABA CE1428EHA, Argentina
| | - Ana Keselman
- Centro de Investigaciones Endocrinológicas "Dr. César Bergadá," FEI - CONICET - División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Ciudad de Buenos Aires, CABA CE1428EHA, Argentina
| | - Ignacio Bergadá
- Centro de Investigaciones Endocrinológicas "Dr. César Bergadá," FEI - CONICET - División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Ciudad de Buenos Aires, CABA CE1428EHA, Argentina
| | - Marcelo A Martí
- Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires e Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales CONICET, Pabellòn 2 de Ciudad Universitaria, Ciudad de Buenos Aires, CABA C1428EHA, Argentina
| | - Alexandru Saveanu
- Aix Marseille University, AP-HM, INSERM, Marseille Medical Genetics, Marmara Institute, La Conception Hospital, Laboratory of Molecular Biology, Marseille 13385, France
| | - Anne Barlier
- Aix Marseille University, AP-HM, INSERM, Marseille Medical Genetics, Marmara Institute, La Conception Hospital, Laboratory of Molecular Biology, Marseille 13385, France
| | - Rami Abou Jamra
- Institute of Human Genetics, University of Leipzig Medical Center, Leipzig 04103, Germany
| | - Michael H Guo
- Division of Endocrinology, Boston Children's Hospital and Department of Genetics, Harvard Medical School, Boston, MA 02115, USA
| | - Andrew Dauber
- Cincinnati Center for Growth Disorders, Division of Endocrinology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Marilena Nakaguma
- Developmental Endocrinology Unit, Laboratory of Hormones and Molecular Genetics LIM/42, Division of Endocrinology, Hospital das Clinicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo 05403-900, Brazil
| | - Berenice B Mendonca
- Developmental Endocrinology Unit, Laboratory of Hormones and Molecular Genetics LIM/42, Division of Endocrinology, Hospital das Clinicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo 05403-900, Brazil
| | - Sajini N Jayakody
- Department of Human Genetics, University of Michigan, Ann Arbor, MI 48109-5618, USA
| | - A Bilge Ozel
- Department of Human Genetics, University of Michigan, Ann Arbor, MI 48109-5618, USA
| | - Qing Fang
- Department of Human Genetics, University of Michigan, Ann Arbor, MI 48109-5618, USA
| | - Qianyi Ma
- Department of Human Genetics, University of Michigan, Ann Arbor, MI 48109-5618, USA
| | - Jun Z Li
- Department of Human Genetics, University of Michigan, Ann Arbor, MI 48109-5618, USA
| | - Thierry Brue
- Aix Marseille University, AP-HM, INSERM, Marseille Medical Genetics, Marmara Institute, La Conception Hospital, Department of Endocrinology, Marseille 13005, France
| | - María Ines Pérez Millán
- Instituto de Biociencias, Biotecnología y Biología Traslacional, Departamento de Fisiología, Biología Molecular y Celular, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad de Buenos Aires, CABA CE1428EHA, Argentina
| | - Ivo J P Arnhold
- Developmental Endocrinology Unit, Laboratory of Hormones and Molecular Genetics LIM/42, Division of Endocrinology, Hospital das Clinicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo 05403-900, Brazil
| | - Roland Pfaeffle
- Department of Women's and Child Health, Division of Pediatric Endocrinology, University Hospital Leipzig, Leipzig 04103, Germany; Institute of Human Genetics, University of Leipzig Medical Center, Leipzig 04103, Germany
| | - Jacob O Kitzman
- Department of Human Genetics, University of Michigan, Ann Arbor, MI 48109-5618, USA; Department of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, MI 48109-2218, USA.
| | - Sally A Camper
- Department of Human Genetics, University of Michigan, Ann Arbor, MI 48109-5618, USA.
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