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J Med Genet 39:e65 doi:10.1136/jmg.39.10.e65
  • Online mutation report

Germline MSH2 and MLH1 mutational spectrum in HNPCC families from Poland and the Baltic States

  1. G Kurzawski1,
  2. J Suchy1,
  3. J Kładny2,
  4. K Safranow3,
  5. A Jakubowska1,
  6. P Elsakov4,
  7. V Kucinskas4,
  8. J Gardovski5,
  9. A Irmejs5,
  10. H Sibul6,
  11. T Huzarski1,
  12. T Byrski1,
  13. T Dębniak1,
  14. C Cybulski1,
  15. J Gronwald1,
  16. O Oszurek1,
  17. J Clark1,
  18. S Góźdź7,
  19. S Niepsuj8,
  20. R Słomski9,
  21. A Pławski9,
  22. A Łącka-Wojciechowska10,
  23. A Rozmiarek11,
  24. Ł Fiszer-Maliszewska12,
  25. M Bębenek13,
  26. D Sorokin13,
  27. M Stawicka14,
  28. D Godlewski14,
  29. P Richter15,
  30. I Brożek16,
  31. B Wysocka16,
  32. A Jawień17,
  33. Z Banaszkiewicz17,
  34. J Kowalczyk18,
  35. D Czudowska19,
  36. P E Goretzki20,
  37. G Moeslein20,
  38. J Lubiński1
  1. 1Hereditary Cancer Centre - Department of Genetics and Pathology, Pomeranian Academy of Medicine, Szczecin, Poland
  2. 2Department of General and Vascular Surgery, Pomeranian Academy of Medicine, Szczecin, Poland
  3. 3Department of Biochemistry and Chemistry, Pomeranian Academy of Medicine, Szczecin, Poland
  4. 4Human Genetics Centre, Vilnius University, Lithuania
  5. 5Department of Surgery, Riga Stradins University, Latvia
  6. 6Institute of Molecular and Cell Biology, Estonian Biocentre University of Tartu, Estonia
  7. 7Holycross Oncology Centre, Kielce, Poland
  8. 8Regional Oncology Hospital, Olsztyn, Poland
  9. 9Department of Human Genetics, Polish Academy of Science, Poznań, Poland
  10. 10Regional Oncology Hospital, Poznań, Poland
  11. 11Oncology Centre, Zielona Góra, Poland
  12. 12Institute of Immunology and Experimental Therapy, Polish Academy of Science, Wrocław, Poland
  13. 13Regional Oncology Hospital, Wrocław, Poland
  14. 14Prophylactic and Epidemiology Centre, Poznań, Poland
  15. 15Clinics of Surgery, Jagielonian University, Kraków, Poland
  16. 16Department of Biology and Genetics, Medical Academy, Gdańsk, Poland
  17. 17Department of Surgery, Medical Academy, Bydgoszcz, Poland
  18. 18Paediatric Haematology and Oncology Clinics, Medical Academy, Lublin, Poland
  19. 19Oncology Diagnostic Centre, Legnica, Poland
  20. 20Department of Surgery, University of Dusseldorf, Germany
  1. Correspondence to:
 Dr G Kurzawski, Department of Genetics and Pathology, Pomeranian Academy of Medicine, ul Polabska 4 Szczecin 70-115, Poland;
 gkurz{at}sci.pam.szczecin.pl

    Hereditary non-polyposis colorectal cancer (HNPCC, Lynch syndrome) is an autosomal dominantly inherited syndrome predisposing to the early development of cancers of the colon, rectum, endometrium, small bowel, and urinary tract and accounts for ∼5% of all colon cancer cases.1 There are at least five genes involved in this cancer predisposition and they include MLH1,2MSH2,3MSH6,4PMS2, and PMS1.5 Currently, more than 300 different mutations have been described in these genes which account for approximately 500 HNPCC kindreds from different parts of the world.6MLH1 and MSH2 genes show abnormalities in more than 90% of HNPCC families with identified germline mutations7 (http://www.nfdht.nl). The majority of reported MLH1 and MSH2 mutations are dispersed throughout the 35 exons of these two genes. However, some changes are recurrent and are described as founder mutations in particular populations.8–11 In order to develop efficient DNA testing, it is important to describe the nature and frequency of mutations that are characteristic of particular ethnic groups. The MSH2 and MLH1 mutation spectrum has not been investigated in the eastern European region and therefore there is no knowledge about any recurrent mutations which may significantly aid in the mutation screening procedures for this region. Here, we describe the results of DNA/RNA based mutation sequencing of both the MSH2 and MLH1 genes in a series of HNPCC families from Poland (89 cases) and the Baltic States (12 cases).

    MATERIAL AND METHODS

    Patients

    A total of 101 unrelated patients affected by colorectal cancer or an HNPCC associated cancer (endometrium, small bowel, urinary tract) were from 17 families which fulfilled the Amsterdam II criteria12 and from 84 families matching our modified criteria of suspected HNPCC, one colorectal cancer patient with a first degree relative affected by an HNPCC associated cancer, …