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Gana S, Serpieri V, Giorgio E, Iorio M, Rognone E, Pichiecchio A, Chiappedi M, Valente EM. Marked intrafamilial variability of clinical and neuroimaging manifestations in NFIB-related developmental disorder. Am J Med Genet A 2023; 191:1395-1400. [PMID: 36756855 DOI: 10.1002/ajmg.a.63138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 12/23/2022] [Accepted: 01/20/2023] [Indexed: 02/10/2023]
Abstract
NFIB belongs to the nuclear factor I (NFI) family of transcription factors that, by activating or repressing gene expression during embryogenesis, has a relevant role in the development of several organs including the brain. Heterozygous pathogenic variants of NFIB have recently been associated with developmental delay and mild-to-moderate intellectual disability, macrocephaly, nonspecific facial dysmorphisms, and corpus callosum dysgenesis. We identified a heterozygous missense variant in the NFIB gene in a 15-year-old boy with neurodevelopmental disorder and brain malformations, who inherited the variant from his substantially healthy mother presenting only minor physical and neuroanatomical defects.
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Affiliation(s)
- Simone Gana
- Neurogenetics Research Center, IRCCS Mondino Foundation, Pavia, Italy
| | | | - Elisa Giorgio
- Neurogenetics Research Center, IRCCS Mondino Foundation, Pavia, Italy.,Department of Molecular Medicine, University of Pavia, Pavia, Italy
| | - Melanie Iorio
- Department of Brain and Behavioual Sciences, University of Pavia, Pavia, Italy
| | - Elisa Rognone
- Advanced Imaging and Radiomics Center, Neuroradiology Department, IRCCS Mondino Foundation, Pavia, Italy
| | - Anna Pichiecchio
- Department of Brain and Behavioual Sciences, University of Pavia, Pavia, Italy.,Advanced Imaging and Radiomics Center, Neuroradiology Department, IRCCS Mondino Foundation, Pavia, Italy
| | - Matteo Chiappedi
- Child Neurology and Psychiatry Unit, ASST Pavia, Vigevano, Italy
| | - Enza Maria Valente
- Neurogenetics Research Center, IRCCS Mondino Foundation, Pavia, Italy.,Department of Molecular Medicine, University of Pavia, Pavia, Italy
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Marinella G, Conti E, Buchignani B, Sgherri G, Pasquariello R, Giordano F, Cristofani P, Battini R, Battaglia A. Further characterization of NFIB-associated phenotypes: Report of two new individuals. Am J Med Genet A 2023; 191:540-545. [PMID: 36321570 PMCID: PMC10091694 DOI: 10.1002/ajmg.a.63018] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 09/13/2022] [Accepted: 10/07/2022] [Indexed: 01/11/2023]
Abstract
Nuclear Factor I B (NFIB) haploinsufficiency has recently been identified as a cause of intellectual disability (ID) and macrocephaly. Here we report on two new individuals carrying a microdeletion in the chromosomal region 9p23-p22.3 containing NFIB. The first is a 7-year 9-month old boy with developmental delays, ID, definite facial anomalies, and brain and spinal cord magnetic resonance imaging findings including periventricular nodular heterotopia, hypoplasia of the corpus callosum, arachnoid cyst in the left middle cranial fossa, syringomyelia in the thoracic spinal cord and distal tract of the conus medullaris, and a stretched appearance of the filum terminale. The second is a 32-year-old lady (the proband' mother) with dysmorphic features, and a history of learning disability, hypothyroidism, poor growth, left inguinal hernia, and panic attacks. Her brain magnetic resonance imaging findings include a dysmorphic corpus callosum, and a small cyst in the left choroidal fissure that marks the hippocampal head. Array-based comparative genomic hybridization identified, in both, a 232 Kb interstitial deletion at 9p23p22.3 including several exons of NFIB and no other known genes. Our two individuals add to the knowledge of this rare disorder through the addition of new brain and spinal cord MRI findings and dysmorphic features. We propose that NFIB haploinsufficiency causes a clinically recognizable malformation-ID syndrome.
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Affiliation(s)
- Gemma Marinella
- Department of Developmental Neuroscience, IRCCS Stella Maris Foundation, Calambrone, Pisa, Italy
| | - Eugenia Conti
- Department of Developmental Neuroscience, IRCCS Stella Maris Foundation, Calambrone, Pisa, Italy
| | - Bianca Buchignani
- Department of Developmental Neuroscience, IRCCS Stella Maris Foundation, Calambrone, Pisa, Italy.,Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Pisa, Italy
| | - Giada Sgherri
- Department of Developmental Neuroscience, IRCCS Stella Maris Foundation, Calambrone, Pisa, Italy
| | - Rosa Pasquariello
- Department of Developmental Neuroscience, IRCCS Stella Maris Foundation, Calambrone, Pisa, Italy
| | - Flavio Giordano
- Department of Neurosurgery, Children's Hospital A. Meyer-University of Florence, Firenze, Florence, Italy
| | - Paola Cristofani
- Department of Developmental Neuroscience, IRCCS Stella Maris Foundation, Calambrone, Pisa, Italy
| | - Roberta Battini
- Department of Developmental Neuroscience, IRCCS Stella Maris Foundation, Calambrone, Pisa, Italy.,Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Pisa, Italy
| | - Agatino Battaglia
- Department of Developmental Neuroscience, IRCCS Stella Maris Foundation, Calambrone, Pisa, Italy
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Huang H, Jin J, Wu L, Wu H, Pi H, Dong Y, Xiang R. A de novo Non-sense Nuclear Factor I B Mutation (p.Tyr290*) Is Responsible for Brain Malformation and Lung Lobulation Defects. Front Pediatr 2022; 10:865181. [PMID: 35433561 PMCID: PMC9005976 DOI: 10.3389/fped.2022.865181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 03/07/2022] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Nuclear factor I B (NFIB) plays an important role in regulating the transcription of multiple biological processes. Mutations in NFIB cause intellectual disability and macrocephaly. However, studies on abnormal brain and lung development caused by NFIB mutations are lacking. METHODS In the present study, we enrolled a fetus with brain malformation and lung lobulation defects from China. Whole-exome sequencing (WES) was performed to detect the candidate genes and Sanger sequencing was performed for mutational analysis. RESULTS After data filtering and bioinformatics prediction, a novel non-sense mutation of NFIB (NM_001190737:c.870C > A;p.Tyr290*) was identified in the fetus. This variant was predicted to produce a truncated NFIB protein because of a premature stop codon and was absent in 200 healthy controls. CONCLUSION To the best of our knowledge, this is the first case of brain malformation and lung lobulation defects caused by a NFIB variant in Asia. These findings contribute to genetic diagnosis and family counseling and expand our understanding of NFIB mutations as well as brain and lung maturation.
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Affiliation(s)
- Hao Huang
- Department of Nephrology, Xiangya Hospital, Central South University, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China.,Department of Cell Biology, School of Life Sciences, Central South University, Changsha, China
| | - Jieyuan Jin
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China.,Department of Cell Biology, School of Life Sciences, Central South University, Changsha, China
| | - Liping Wu
- Department of Medical Genetics and Prenatal Diagnosis, Shenzhen Longgang District Maternity and Child Healthcare Hospital, Shenzhen, China
| | - Huifen Wu
- Obstetric Inpatient Department, Shenzhen Longgang District Maternity and Child Healthcare Hospital, Shenzhen, China
| | - Huichun Pi
- Department of Medical Genetics and Prenatal Diagnosis, Shenzhen Longgang District Maternity and Child Healthcare Hospital, Shenzhen, China
| | - Yi Dong
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China.,Department of Cell Biology, School of Life Sciences, Central South University, Changsha, China
| | - Rong Xiang
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China.,Department of Cell Biology, School of Life Sciences, Central South University, Changsha, China
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