Presymptomatic diagnosis using a deletion of a single codon in families with hereditary non-polyposis colorectal cancer

Rasmus S. Ripa; Niels Katballe; Friedrik P. Wikman; Anne Charlotte Jäger; Inge Bernstein; Torben Ørntoft; Marianne Schwartz; Finn Cilius Nielsen; Marie Luise Bisgaard

Presymptomatic diagnosis using a deletion of a single codon in families with hereditary non-polyposis colorectal cancer

Rasmus S. Ripa, Niels Katballe, Friedrik P. Wikman, Anne Charlotte Jäger, Inge Bernstein, Torben Ørntoft, Marianne Schwartz, Finn Cilius Nielsen, Marie Luise Bisgaard

7 Citations (Scopus)

Abstract

The diagnosis of hereditary non-polyposis colorectal cancer (HNPCC) is often confirmed by a mutation in one of several mismatch-repair genes, in particular MLH1, MSH2 and MSH6. Presymptomatic diagnosis requires the identification of a mutation causing the disease. Three different deletions of a single amino acid codon have previously been published as assumed pathogenic. The objective of this study was to determine if an MSH2 3 base pair in-frame deletion (N596del) could be used in presymptomatic screening of at-risk individuals. We report on five HNPCC families with the N596del mutation, identified after mutation screening of MSH2 and MLH1. All patients in the families were haplotyped using markers flanking the MSH2 gene. The haplotypes revealed that the five families with high probability descended from only two founders. The N596del segregated with the HNPCC phenotype with lod scores of 3.2 and 2.0 at the recombination fraction of 0.0 in the two founder families. Sequencing of MSH2 and MLH1 did not reveal other pathogenic mutations, and N596del was not identified in 50 healthy controls. The mutation has previously been found expressed in mRNA, and is located in a conserved domain. The results support the hypothesis that N596del is the disease causing mutation and not a clinically silent variation. On this basis, the application of the MSH2 N596del mutation, in presymptomatic screening of HNPCC families, is recommended.

Original language	English
Journal	Mutation Research - Reviews
Volume	570
Issue number	1
Pages (from-to)	89-96
Number of pages	8
ISSN	1383-5742
Publication status	Published - 2005

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Ripa, R. S., Katballe, N., Wikman, F. P., Jäger, A. C., Bernstein, I., Ørntoft, T., Schwartz, M., Nielsen, F. C., & Bisgaard, M. L. (2005). Presymptomatic diagnosis using a deletion of a single codon in families with hereditary non-polyposis colorectal cancer. Mutation Research - Reviews, 570(1), 89-96. http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6T2C-4DXTHRY-2-1&_cdi=4915&_user=641710&_orig=browse&_coverDate=02%2F15%2F2005&_sk=994299998&view=c&wchp=dGLzVlz-zSkWA&md5=849d1040e490dfa103b24334848267ab&ie=/sdarticle.pdf

Ripa, RS, Katballe, N, Wikman, FP, Jäger, AC, Bernstein, I, Ørntoft, T, Schwartz, M, Nielsen, FC & Bisgaard, ML 2005, 'Presymptomatic diagnosis using a deletion of a single codon in families with hereditary non-polyposis colorectal cancer', Mutation Research - Reviews, vol. 570, no. 1, pp. 89-96. <http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6T2C-4DXTHRY-2-1&_cdi=4915&_user=641710&_orig=browse&_coverDate=02%2F15%2F2005&_sk=994299998&view=c&wchp=dGLzVlz-zSkWA&md5=849d1040e490dfa103b24334848267ab&ie=/sdarticle.pdf>

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title = "Presymptomatic diagnosis using a deletion of a single codon in families with hereditary non-polyposis colorectal cancer",

abstract = "The diagnosis of hereditary non-polyposis colorectal cancer (HNPCC) is often confirmed by a mutation in one of several mismatch-repair genes, in particular MLH1, MSH2 and MSH6. Presymptomatic diagnosis requires the identification of a mutation causing the disease. Three different deletions of a single amino acid codon have previously been published as assumed pathogenic. The objective of this study was to determine if an MSH2 3 base pair in-frame deletion (N596del) could be used in presymptomatic screening of at-risk individuals. We report on five HNPCC families with the N596del mutation, identified after mutation screening of MSH2 and MLH1. All patients in the families were haplotyped using markers flanking the MSH2 gene. The haplotypes revealed that the five families with high probability descended from only two founders. The N596del segregated with the HNPCC phenotype with lod scores of 3.2 and 2.0 at the recombination fraction of 0.0 in the two founder families. Sequencing of MSH2 and MLH1 did not reveal other pathogenic mutations, and N596del was not identified in 50 healthy controls. The mutation has previously been found expressed in mRNA, and is located in a conserved domain. The results support the hypothesis that N596del is the disease causing mutation and not a clinically silent variation. On this basis, the application of the MSH2 N596del mutation, in presymptomatic screening of HNPCC families, is recommended.",

author = "Ripa, {Rasmus S.} and Niels Katballe and Wikman, {Friedrik P.} and J{\"a}ger, {Anne Charlotte} and Inge Bernstein and Torben {\O}rntoft and Marianne Schwartz and Nielsen, {Finn Cilius} and Bisgaard, {Marie Luise}",

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T1 - Presymptomatic diagnosis using a deletion of a single codon in families with hereditary non-polyposis colorectal cancer

AU - Ripa, Rasmus S.

AU - Katballe, Niels

AU - Wikman, Friedrik P.

AU - Jäger, Anne Charlotte

AU - Bernstein, Inge

AU - Ørntoft, Torben

AU - Schwartz, Marianne

AU - Nielsen, Finn Cilius

AU - Bisgaard, Marie Luise

PY - 2005

Y1 - 2005

N2 - The diagnosis of hereditary non-polyposis colorectal cancer (HNPCC) is often confirmed by a mutation in one of several mismatch-repair genes, in particular MLH1, MSH2 and MSH6. Presymptomatic diagnosis requires the identification of a mutation causing the disease. Three different deletions of a single amino acid codon have previously been published as assumed pathogenic. The objective of this study was to determine if an MSH2 3 base pair in-frame deletion (N596del) could be used in presymptomatic screening of at-risk individuals. We report on five HNPCC families with the N596del mutation, identified after mutation screening of MSH2 and MLH1. All patients in the families were haplotyped using markers flanking the MSH2 gene. The haplotypes revealed that the five families with high probability descended from only two founders. The N596del segregated with the HNPCC phenotype with lod scores of 3.2 and 2.0 at the recombination fraction of 0.0 in the two founder families. Sequencing of MSH2 and MLH1 did not reveal other pathogenic mutations, and N596del was not identified in 50 healthy controls. The mutation has previously been found expressed in mRNA, and is located in a conserved domain. The results support the hypothesis that N596del is the disease causing mutation and not a clinically silent variation. On this basis, the application of the MSH2 N596del mutation, in presymptomatic screening of HNPCC families, is recommended.

AB - The diagnosis of hereditary non-polyposis colorectal cancer (HNPCC) is often confirmed by a mutation in one of several mismatch-repair genes, in particular MLH1, MSH2 and MSH6. Presymptomatic diagnosis requires the identification of a mutation causing the disease. Three different deletions of a single amino acid codon have previously been published as assumed pathogenic. The objective of this study was to determine if an MSH2 3 base pair in-frame deletion (N596del) could be used in presymptomatic screening of at-risk individuals. We report on five HNPCC families with the N596del mutation, identified after mutation screening of MSH2 and MLH1. All patients in the families were haplotyped using markers flanking the MSH2 gene. The haplotypes revealed that the five families with high probability descended from only two founders. The N596del segregated with the HNPCC phenotype with lod scores of 3.2 and 2.0 at the recombination fraction of 0.0 in the two founder families. Sequencing of MSH2 and MLH1 did not reveal other pathogenic mutations, and N596del was not identified in 50 healthy controls. The mutation has previously been found expressed in mRNA, and is located in a conserved domain. The results support the hypothesis that N596del is the disease causing mutation and not a clinically silent variation. On this basis, the application of the MSH2 N596del mutation, in presymptomatic screening of HNPCC families, is recommended.

M3 - Journal article

SN - 1383-5742

VL - 570

SP - 89

EP - 96

JO - Mutation Research - Reviews

JF - Mutation Research - Reviews

IS - 1

ER -

Presymptomatic diagnosis using a deletion of a single codon in families with hereditary non-polyposis colorectal cancer

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