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| 001 | 167140 | ||
| 005 | 20240229133531.0 | ||
| 024 | 7 | _ | |a 10.1186/s13053-021-00167-0 |2 doi |
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| 041 | _ | _ | |a eng |
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| 100 | 1 | _ | |a Kumar, Abhishek |0 P:(DE-He78)da09d83faa85c143d15611698f7b1eac |b 0 |e First author |
| 245 | _ | _ | |a A rare large duplication of MLH1 identified in Lynch syndrome. |
| 260 | _ | _ | |a Heidelberg |c 2021 |b Springer |
| 336 | 7 | _ | |a article |2 DRIVER |
| 336 | 7 | _ | |a Output Types/Journal article |2 DataCite |
| 336 | 7 | _ | |a Journal Article |b journal |m journal |0 PUB:(DE-HGF)16 |s 1611238528_828 |2 PUB:(DE-HGF) |
| 336 | 7 | _ | |a ARTICLE |2 BibTeX |
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| 500 | _ | _ | |a #EA:C050#LA:B062# |
| 520 | _ | _ | |a The most frequently identified strong cancer predisposition mutations for colorectal cancer (CRC) are those in the mismatch repair (MMR) genes in Lynch syndrome. Laboratory diagnostics include testing tumors for immunohistochemical staining (IHC) of the Lynch syndrome-associated DNA MMR proteins and/or for microsatellite instability (MSI) followed by sequencing or other techniques, such as denaturing high performance liquid chromatography (DHPLC), to identify the mutation.In an ongoing project focusing on finding Mendelian cancer syndromes we applied whole-exome/whole-genome sequencing (WES/WGS) to 19 CRC families.Three families were identified with a pathogenic/likely pathogenic germline variant in a MMR gene that had previously tested negative in DHPLC gene variant screening. All families had a history of CRC in several family members across multiple generations. Tumor analysis showed loss of the MMR protein IHC staining corresponding to the mutated genes, as well as MSI. In family A, a structural variant, a duplication of exons 4 to 13, was identified in MLH1. The duplication was predicted to lead to a frameshift at amino acid 520 and a premature stop codon at amino acid 539. In family B, a 1 base pair deletion was found in MLH1, resulting in a frameshift and a stop codon at amino acid 491. In family C, we identified a splice site variant in MSH2, which was predicted to lead loss of a splice donor site.We identified altogether three pathogenic/likely pathogenic variants in the MMR genes in three of the 19 sequenced families. The MLH1 variants, a duplication of exons 4 to 13 and a frameshift variant, were novel, based on the InSiGHT and ClinVar databases; the MSH2 splice site variant was reported by a single submitter in ClinVar. As a variant class, duplications have rarely been reported in the MMR gene literature, particularly those covering several exons. |
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| 650 | _ | 7 | |a Genetic predisposition |2 Other |
| 650 | _ | 7 | |a Lynch syndrome |2 Other |
| 650 | _ | 7 | |a Mismatch repair genes |2 Other |
| 650 | _ | 7 | |a Whole-genome sequencing |2 Other |
| 700 | 1 | _ | |a Paramasivam, Nagarajan |b 1 |
| 700 | 1 | _ | |a Bandapalli, Obul Reddy |0 P:(DE-He78)b11ccde1801d45d32a6a60f7b396d7dc |b 2 |u dkfz |
| 700 | 1 | _ | |a Schlesner, Matthias |0 P:(DE-He78)f2a782242acf94a3114d75c45dc75b37 |b 3 |u dkfz |
| 700 | 1 | _ | |a Chen, Tianhui |b 4 |
| 700 | 1 | _ | |a Sijmons, Rolf |b 5 |
| 700 | 1 | _ | |a Dymerska, Dagmara |b 6 |
| 700 | 1 | _ | |a Golebiewska, Katarzyna |b 7 |
| 700 | 1 | _ | |a Kuswik, Magdalena |b 8 |
| 700 | 1 | _ | |a Lubinski, Jan |b 9 |
| 700 | 1 | _ | |a Hemminki, Kari |0 P:(DE-He78)19b0ec1cea271419d9fa8680e6ed6865 |b 10 |u dkfz |
| 700 | 1 | _ | |a Försti, Asta |0 P:(DE-He78)f26164c08f2f14abcf31e52e13ee3696 |b 11 |e Last author |u dkfz |
| 773 | _ | _ | |a 10.1186/s13053-021-00167-0 |g Vol. 19, no. 1, p. 10 |0 PERI:(DE-600)2233352-6 |n 1 |p 10 |t Hereditary cancer in clinical practice |v 19 |y 2021 |x 1897-4287 |
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