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Olszewska DA, Fearon C, McGuigan C, McVeigh TP, Houlden H, Polke JM, Lawlor B, Coen R, Hutchinson M, Hutton M, Beausang A, Delon I, Brett F, Sevastou I, Seto-Salvia N, de Silva R, Lynch T. A clinical, molecular genetics and pathological study of a FTDP-17 family with a heterozygous splicing variant c.823-10G>T at the intron 9/exon 10 of the MAPT gene. Neurobiol Aging 2021; 106:343.e1-343.e8. [PMID: 34274155 DOI: 10.1016/j.neurobiolaging.2021.05.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 04/17/2021] [Accepted: 05/13/2021] [Indexed: 11/15/2022]
Abstract
We report the first clinical-radiological-genetic-molecular-pathological study of a kindred with c.823-10G>T MAPT intronic variant (rs63749974) associated with frontotemporal dementia and parkinsonism linked to chromosome 17 (FTDP-17). We describe the clinical spectrum within this family and emphasize the association between MAPT gene variants and motor neuron disease. This report of a second family with FTDP-17 associated with c.823-10G>T MAPT variant strongly supports pathogenicity of the variant and confirms it is a 4-repeat (4R) tauopathy. This intronic point mutation, probably strengthens the polypyrimidine tract and alters the splicing of exon 10 (10 nucleotides into intron 9) close to the 3' splice site.
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Affiliation(s)
- Diana A Olszewska
- Department of Neurology, Dublin Neurological Institute, Mater Misericordiae University Hospital, Dublin, Ireland
| | - Conor Fearon
- Department of Neurology, Dublin Neurological Institute, Mater Misericordiae University Hospital, Dublin, Ireland
| | | | | | - Henry Houlden
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, UK
| | - James M Polke
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, UK
| | - Brian Lawlor
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, UK
| | - Robert Coen
- Mercer's Institute of Aging, St James's Hospital Dublin, Ireland
| | | | - Michael Hutton
- Department of Neurology, St Vincent's University Hospital, Dublin, Ireland
| | - Alan Beausang
- Eli Lilly Research Laboratories, Lilly Corporate Center, Indianapolis, USA
| | - Isabelle Delon
- Department of Neuropathology, Beaumont Hospital, Dublin, Ireland
| | - Francesca Brett
- East Genomic Laboratory Hub, Cambridge University Hospital NHS Foundation Trust, Addenbrooke's Treatment Centre, Hills Road, Cambridge, UK
| | - Ioanna Sevastou
- Department of Neuropathology, Beaumont Hospital, Dublin, Ireland
| | - Nuria Seto-Salvia
- East Genomic Laboratory Hub, Cambridge University Hospital NHS Foundation Trust, Addenbrooke's Treatment Centre, Hills Road, Cambridge, UK
| | - Rohan de Silva
- Department of Clinical and Movement Neuroscience, Reta Lila Weston Institute, UCL Queen Square Institute of Neurology, London, UK
| | - Tim Lynch
- Department of Neurology, Dublin Neurological Institute, Mater Misericordiae University Hospital, Dublin, Ireland; Health affairs, University College Dublin, Dublin, Ireland; Ireland East Hospital Group, Dublin, Ireland.
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