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Peron A, Novara F, La Briola F, Merati E, Giannusa E, Segalini E, Anniballi G, Vignoli A, Ciccone R, Canevini MP. Missense variants in the Arg206 residue of HNRNPH2: Further evidence of causality and expansion of the phenotype. Am J Med Genet A 2020; 182:823-828. [PMID: 31943778 DOI: 10.1002/ajmg.a.61486] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Revised: 12/05/2019] [Accepted: 12/27/2019] [Indexed: 11/11/2022]
Abstract
Missense variants in HNRNPH2 cause Bain type syndromic X-linked intellectual disability (XLID). To date, only six affected females and three affected males have been reported in the literature, and the phenotype has yet to be delineated in detail. Here, we report on a 35-year-old female with a novel de novo variant in HNRNPH2, providing further evidence that missense changes in the nuclear localization sequence cause Bain type XLID and that aminoacid 206 likely represents a mutational hotspot. We expand the phenotype of Bain type XLID to include breathing, sleep and movement disorders, cerebellar vermis hypoplasia, stereotypies, and hypersensitivity to noise. Our data indicate that the phenotype may be broader and more variable than initially reported, and suggest Rett syndrome as a possible differential diagnosis.
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Affiliation(s)
- Angela Peron
- Child Neuropsychiatry Unit - Epilepsy Center, San Paolo Hospital, Milan, Italy.,Department of Health Sciences, Università degli Studi di Milano, Milan, Italy.,Department of Pediatrics, Division of Medical Genetics, University of Utah School of Medicine, Salt Lake City, Utah
| | | | - Francesca La Briola
- Child Neuropsychiatry Unit - Epilepsy Center, San Paolo Hospital, Milan, Italy
| | - Elisabetta Merati
- Child Neuropsychiatry Unit - Epilepsy Center, San Paolo Hospital, Milan, Italy.,Department of Health Sciences, Università degli Studi di Milano, Milan, Italy
| | | | | | | | - Aglaia Vignoli
- Child Neuropsychiatry Unit - Epilepsy Center, San Paolo Hospital, Milan, Italy.,Department of Health Sciences, Università degli Studi di Milano, Milan, Italy
| | - Roberto Ciccone
- Microgenomics srl, Pavia, Italy.,Biology and Medical Genetics Unit, Department of Molecular Medicine, Università di Pavia, Pavia, Italy
| | - Maria Paola Canevini
- Child Neuropsychiatry Unit - Epilepsy Center, San Paolo Hospital, Milan, Italy.,Department of Health Sciences, Università degli Studi di Milano, Milan, Italy
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