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Bjørnstad PM, Aaløkken R, Åsheim J, Sundaram AYM, Felde CN, Østby GH, Dalland M, Sjursen W, Carrizosa C, Vigeland MD, Sorte HS, Sheng Y, Ariansen SL, Grindedal EM, Gilfillan GD. Publisher Correction: A 39 kb structural variant causing Lynch syndrome detected by optical genome mapping and nanopore sequencing. Eur J Hum Genet 2024; 32:601-602. [PMID: 38172175 PMCID: PMC11061170 DOI: 10.1038/s41431-023-01519-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024] Open
Affiliation(s)
- Pål Marius Bjørnstad
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Ragnhild Aaløkken
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - June Åsheim
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Arvind Y M Sundaram
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Caroline N Felde
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - G Henriette Østby
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Marianne Dalland
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Wenche Sjursen
- Department of Clinical & Molecular Medicine, NTNU and Department of Medical Genetics, St Olavs Hospital, Trondheim, Norway
| | - Christian Carrizosa
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Magnus D Vigeland
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
- Department of Forensic Sciences, Oslo University Hospital, 0372, Oslo, Norway
| | - Hanne S Sorte
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Ying Sheng
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Sarah L Ariansen
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Eli Marie Grindedal
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Gregor D Gilfillan
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway.
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Bjørnstad PM, Aaløkken R, Åsheim J, Sundaram AYM, Felde CN, Østby GH, Dalland M, Sjursen W, Carrizosa C, Vigeland MD, Sorte HS, Sheng Y, Ariansen SL, Grindedal EM, Gilfillan GD. A 39 kb structural variant causing Lynch Syndrome detected by optical genome mapping and nanopore sequencing. Eur J Hum Genet 2024; 32:513-520. [PMID: 38030917 PMCID: PMC11061271 DOI: 10.1038/s41431-023-01494-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 10/19/2023] [Accepted: 11/06/2023] [Indexed: 12/01/2023] Open
Abstract
Lynch Syndrome (LS) is a hereditary cancer syndrome caused by pathogenic germline variants in one of the four mismatch repair (MMR) genes MLH1, MSH2, MSH6 and PMS2. It is characterized by a significantly increased risk of multiple cancer types, particularly colorectal and endometrial cancer, with autosomal dominant inheritance. Access to precise and sensitive methods for genetic testing is important, as early detection and prevention of cancer is possible when the variant is known. We present here two unrelated Norwegian families with family histories strongly suggestive of LS, where immunohistochemical and microsatellite instability analyses indicated presence of a pathogenic variant in MSH2, but targeted exon sequencing and multiplex ligation-dependent probe amplification (MLPA) were negative. Using Bionano optical genome mapping, we detected a 39 kb insertion in the MSH2 gene. Precise mapping of the insertion breakpoints and inserted sequence was performed by low-coverage whole-genome sequencing with an Oxford Nanopore MinION. The same variant was present in both families, and later found in other families from the same region of Norway, indicative of a founder event. To our knowledge, this is the first diagnosis of LS caused by a structural variant using these technologies. We suggest that structural variant detection be performed when LS is suspected but not confirmed with first-tier standard genetic testing.
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Affiliation(s)
- Pål Marius Bjørnstad
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Ragnhild Aaløkken
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - June Åsheim
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Arvind Y M Sundaram
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Caroline N Felde
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - G Henriette Østby
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Marianne Dalland
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Wenche Sjursen
- Department of Clinical & Molecular Medicine, NTNU and Department of Medical Genetics, St Olavs Hospital, Trondheim, Norway
| | - Christian Carrizosa
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Magnus D Vigeland
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
- Department of Forensic Sciences, Oslo University Hospital, 0372, Oslo, Norway
| | - Hanne S Sorte
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Ying Sheng
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Sarah L Ariansen
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Eli Marie Grindedal
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Gregor D Gilfillan
- Department Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway.
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