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1. Quantifying prediction of pathogenicity for within-codon concordance (PM5) using 7541 functional classifications of BRCA1and MSH2missense variants

Author

Loong, Lucy, Cubuk, Cankut, Choi, Subin, Allen, Sophie, Torr, Beth, Garrett, Alice, Loveday, Chey, Durkie, Miranda, Callaway, Alison, Burghel, George J., Drummond, James, Robinson, Rachel, Berry, Ian R., Wallace, Andrew, Eccles, Diana M., Tischkowitz, Marc, Ellard, Sian, Ware, James S., Hanson, Helen, Turnbull, Clare, Samant, S., Lucassen, A., Znaczko, A., Shaw, A., Ansari, A., Kumar, A., Donaldson, A., Murray, A., Ross, A., Taylor-Beadling, A., Taylor, A., Innes, A., Brady, A., Kulkarni, A., Hogg, A.-C., Bowden, A. Ramsay, Hadonou, A., Coad, B., McIldowie, B., Speight, B., DeSouza, B., Mullaney, B., McKenna, C., Brewer, C., Olimpio, C., Clabby, C., Crosby, C., Jenkins, C., Armstrong, C., Bowles, C., Brooks, C., Byrne, C., Maurer, C., Baralle, D., Chubb, D., Stobo, D., Moore, D., O'Sullivan, D., Donnelly, D., Randhawa, D., Halliday, D., Atkinson, E., Baple, E., Rauter, E., Johnston, E., Woodward, E., Maher, E., Sofianopoulou, E., Petrides, E., Lalloo, F., McRonald, F., Pelz, F., Frayling, I., Evans, G., Corbett, G., Rea, G., Clouston, H., Powell, H., Williamson, H., Carley, H., Thomas, H.J.W., Tomlinson, I., Cook, J., Hoyle, J., Tellez, J., Whitworth, J., Williams, J., Murray, J., Campbell, J., Tolmie, J., Field, J., Mason, J., Burn, J., Bruty, J., Callaway, J., Grant, J., Del Rey Jimenez, J., Pagan, J., VanCampen, J., Barwell, J., Monahan, K., Tatton-Brown, K., Ong, K.-R., Murphy, K., Andrews, K., Mokretar, K., Cadoo, K., Smith, K., Baker, K., Brown, K., Reay, K., McKay Bounford, K., Bradshaw, K., Russell, K., Stone, K., Snape, K., Crookes, L., Reed, L., Taggart, L., Yarram, L., Cobbold, L., Walker, L., Walker, L., Hawkes, L., Busby, L., Izatt, L., Kiely, L., Hughes, L., Side, L., Sarkies, L., Greenhalgh, K.-L., Shanmugasundaram, M., Duff, M., Bartlett, M., Watson, M., Owens, M., Bradford, M., Huxley, M., Slean, M., Ryten, M., Smith, M., Ahmed, M., Roberts, N., O'Brien, C., Middleton, O., Tarpey, P., Logan, P., Dean, P., May, P., Brace, P., Tredwell, R., Harrison, R., Hart, R., Kirk, R., Martin, R., Nyanhete, R., Wright, R., Martin, R., Davidson, R., Cleaver, R., Talukdar, S., Butler, S., Sampson, J., Ribeiro, S., Dell, S., Mackenzie, S., Hegarty, S., Albaba, S., McKee, S., Palmer-Smith, S., Heggarty, S., MacParland, S., Greville-Heygate, S., Daniels, S., Prapa, S., Abbs, S., Tennant, S., Hardy, S., MacMahon, S., McVeigh, T., Foo, T., Bedenham, T., Cranston, T., McDevitt, T., Clowes, V., Tripathi, V., McConnell, V., Woodwaer, N., Wallis, Y., Kemp, Z., Mullan, G., Pierson, L., Rainey, L., Joyce, C., Timbs, A., Reuther, A.-M., Frugtniet, B., DeSouza, B., Husher, C., Lawn, C., Corbett, C., Nocera-Jijon, D., Reay, D., Cross, E., Ryan, F., Lindsay, H., Oliver, J., Dring, J., Spiers, J., Harper, J., Ciucias, K., Connolly, L., Tsang, M., Brown, R., Shepherd, S., Begum, S., Daniels, S., Tadiso, T., Linton-Willoughby, T., Heppell, H., Sahan, K., Worrillow, L., Allen, Z., Barlett, M., Watt, C., and Hegarty, M.

Abstract

Conditions and thresholds applied for evidence weighting of within-codon concordance (PM5) for pathogenicity vary widely between laboratories and expert groups. Because of the sparseness of available clinical classifications, there is little evidence for variation in practice.

Published
2022
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2. Classification of Variants of Reduced Penetrance in High Penetrance Cancer Susceptibility Genes: Framework for Genetics Clinicians and Clinical Scientists by CanVIG-UK (Cancer Variant Interpretation Group-UK)

Author

Garrett, Alice, Allen, Sophie, Durkie, Miranda, Burghel, George J., Robinson, Rachel, Callaway, Alison, Field, Joanne, Frugtniet, Bethan, Palmer-Smith, Sheila, Grant, Jonathan, Pagan, Judith, McDevitt, Trudi, Rowlands, Charlie F., McVeigh, Terri, Hanson, Helen, Turnbull, Clare, Turnbull, C., Garrett, A., Loong, L., Choi, S., Torr, B., Allen, S., Durkie, M., Callaway, A., Drummond, J., Burghel, G.J., Robinson, R., Berry, I.R., Wallace, A.J., Eccles, D.M., Tischkowitz, M., Ellard, S., Hanson, H., Baple, E., Evans, D.G., Woodward, E., Lalloo, F., Samant, S., Lucassen, A., Znaczko, A., Shaw, A., Ansari, A., Kumar, A., Donaldson, A., Murray, A., Ross, A., Taylor-Beadling, A., Taylor, A., Innes, A., Brady, A., Kulkarni, A., Hogg, A.C., Bowden, A. Ramsay, Hadonou, A., Coad, B., McIldowie, B., Speight, B., DeSouza, B., Mullaney, B., McKenna, C., Brewer, C., Olimpio, C., Clabby, C., Crosby, C., Jenkins, C., Armstrong, C., Bowles, C., Brooks, C., Byrne, C., Maurer, C., Baralle, D., Chubb, D., Stobo, D., Moore, D., O'Sullivan, D., Donnelly, D., Randhawa, D., Halliday, D., Atkinson, E., Rauter, E., Johnston, E., Maher, E., Sofianopoulou, E., Petrides, E., McRonald, F., Pelz, F., Frayling, I., Corbett, G., Rea, G., Clouston, H., Powell, H., Williamson, H., Carley, H., Thomas, H.J.W., Tomlinson, I., Cook, J., Hoyle, J., Tellez, J., Whitworth, J., Williams, J., Murray, J., Campbell, J., Tolmie, J., Field, J., Mason, J., Burn, J., Bruty, J., Callaway, J., Grant, J., Del Rey Jimenez, J., Pagan, J., VanCampen, J., Barwell, J., Monahan, K., Tatton-Brown, K., Ong, K.R., Murphy, K., Andrews, K., Mokretar, K., Cadoo, K., Smith, K., Baker, K., Brown, K., Reay, K., McKay Bounford, K., Bradshaw, K., Russell, K., Stone, K., Snape, K., Crookes, L., Reed, L., Taggart, L., Yarram, L., Cobbold, L., Walker, L., Walker, L., Hawkes, L., Busby, L., Izatt, L., Kiely, L., Hughes, L., Side, L., Sarkies, L., Greenhalgh, K.-L., Shanmugasundaram, M., Duff, M., Bartlett, M., Watson, M., Owens, M., Bradford, M., Huxley, M., Slean, M., Ryten, M., Smith, M., Ahmed, M., Roberts, N., O'Brien, C., Middleton, O., Tarpey, P., Logan, P., Dean, P., May, P., Brace, P., Tredwell, R., Harrison, R., Hart, R., Kirk, R., Martin, R., Nyanhete, R., Wright, R., Martin, R., Davidson, R., Cleaver, R., Talukdar, S., Butler, S., Sampson, J., Ribeiro, S., Dell, S., Mackenzie, S., Hegarty, S., Albaba, S., McKee, S., Palmer-Smith, S., Heggarty, S., MacParland, S., Greville-Heygate, S., Daniels, S., Prapa, S., Abbs, S., Tennant, S., Hardy, S., MacMahon, S., McVeigh, T., Foo, T., Bedenham, T., Cranston, T., McDevitt, T., Clowes, V., Tripathi, V., McConnell, V., Woodwaer, N., Wallis, Y., Kemp, Z., Mullan, G., Pierson, L., Rainey, L., Joyce, C., Timbs, A., Reuther, A.-M., Frugtniet, B., DeSouza, B., Husher, C., Lawn, C., Corbett, C., Nocera-Jijon, D., Reay, D., Cross, E., Ryan, F., Lindsay, H., Oliver, J., Dring, J., Spiers, J., Harper, J., Ciucias, K., Connolly, L., Tsang, M., Brown, R., Shepherd, S., Begum, S., Daniels, S., Tadiso, T., Linton-Willoughby, T., Heppell, H., Sahan, K., Worrillow, L., Allen, Z., Watt, C., Hegarty, M., Mitchell, R., Coles, R., Nickless, G., Cojocaru, E., Doal, I., Sava, F., McCarthy, C., Jeeneea, R., Goudie, D., McConachie, M., Botosneanu, S., Kavanaugh, G., Russell, K., Sherlaw, C., Tsoulaki, O., Forde, C., Petley, E., Jones, A.-B., Oprych, K., Pryde, S., Hyder, Z., Elkhateeb, N., Braham, R., Hanington, L., Huntley, C., Irving, R., Sadan, A., Ramos, M., Elliot, C., Wren, D., Lobo, D., McLean, J., May, D., Kearney, L., Campbell, T., Asakura, K., Alwadi, L., O’Shea, R., Gabriel, J., Chiecchio, L., Bowman, P., Sutton, L.A., Walsh, C., Cloke, V., Ucanok, D., Davies, J., Pleasance, B., Maguire, E., Whaite, A., Best, S., Westbury, S., Logan, A., Navarajasegaran, D., Bench, A., Wightman, P., Cartwright, A., Higgs, E., J.Bott, Whitehouse, H., Stevens, J., Martin, D., Dunlop, J., Thomas, S., Sau, C., Farndon, S., Coleman, N., Angelini, P., Duff, M., Massey, H., Rowlands, C., Garcia-Petit, C., Gillespie, K., Alder, A., Middleton, E., Cassidy, C., Orfali, N., Webb, A., Luharia, A., Walker, N., Charlton, J., Andreou, A., Peddie, J., Khan, M., Wilkinson, L., Bezuidenhout, H., Edis, M., Callard, A., Ostrowski, P., Moverley, P., Bean, K., Dunne, A., Moleirinho, A., Waller, S., Cox, K., Greensmith, L., Brittle, A., Gossan, N., Freestone, L., Shak, C., Langford, T., Clinch, Y., Livesey, H., Borland, S., Joshi, A., Wall, K., Whitworth, A., Wilsdon, A., Edgerley, K., Pugh, S., Chrysochoidi, N., Mutch, S., McMullan, C., Johnston, Y., Muraru, M., May, A., Begum, R., Smith, C., Patel, R., Bhatnagar, I., Taylor, A., Brown, D., Willan, J., Taylor, S., Jones, K., Cox, K., Ramsden, C., Taiwo, O., Jaudzemaite, J., Sharmin, R., Young, L., C.O’Dubhshlaine, McSorley, L., Rodriguez, I. Abreu, Lillis, S., Alexopoulos, P., Mortensson, E., Kingham, L., Moore, R., Kosicka-Slawinska, M., Aslam, S., Wells, R., Carter, A., Warren, H., Rolf, E., Reed, H., Pearce, L., Lock, D., Ali, F., Kolozi, A., White, N., Wood, D., and Hayden, C.

Abstract

Current practice is to report and manage likely pathogenic/pathogenic variants in a given cancer susceptibility gene (CSG) as though having equivalent penetrance, despite increasing evidence of inter-variant variability in risk associations. Using existing variant interpretation approaches, largely based on full-penetrance models, variants where reduced penetrance is suspected may be classified inconsistently and/or as variants of uncertain significance (VUS). We aimed to develop a national consensus approach for such variants within the Cancer Variant Interpretation Group UK (CanVIG-UK) multidisciplinary network.

Published
2024
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3. The spectrum of p53 mutations in colorectal adenomas differs from that in colorectal carcinomas.

Author

Hao, X P, Frayling, I M, Sgouros, J G, Du, M Q, Willcocks, T C, Talbot, I C, and Tomlinson, I P M

Abstract

BACKGROUND: p53 mutations are frequently observed in colorectal carcinomas but they have also been found in colorectal adenomas, although considerably less frequently. AIMS: To explore p53 mutations in benign tumours, we have screened 70 colorectal adenomas for allelic loss at, and point mutations in, TP53 by analysis of selected microdissected cell populations. RESULTS: Sixteen (22.8%) adenomas were found to have allelic loss, of which 11 (15.7%) had p53 mutations. In adenomas with mild, moderate, or severe dysplasia, mutation or allelic loss occurred in 4.8%, 16.7%, and 52.6%, respectively (p<0.001). Seven different mutations were found, all missense changes or inframe deletions: one (Thr150Arg) has not been found before while three (Gln144His, Gly245Arg, and Glu285Gln) have not been described previously in colorectal tumours. The other three mutations (Arg175Gly, DeltaPro190, and Gly245Ser) have been found in colorectal carcinomas, the last commonly. Adenomas harboured a spectrum of p53 mutations which was significantly different from cancers as regards the position in the gene and a higher frequency of G-->C/C-->G changes. CONCLUSIONS: Combining our data on adenomas with data already published and in comparison with the spectrum of mutations in colorectal carcinomas, it is suggested that some p53 mutations have a weaker effect than others and are therefore more likely to be found in adenomas which have not progressed to carcinomas.

Published
2002

4. The spectrum of p53 mutations in colorectal adenomas differs from that in colorectal carcinomas.

Author

P, Hao X, M, Frayling I, G, Sgouros J, Q, Du M, C, Willcocks T, C, Talbot I, and M, Tomlinson I P

Abstract

BACKGROUND: p53 mutations are frequently observed in colorectal carcinomas but they have also been found in colorectal adenomas, although considerably less frequently. AIMS: To explore p53 mutations in benign tumours, we have screened 70 colorectal adenomas for allelic loss at, and point mutations in, TP53 by analysis of selected microdissected cell populations. RESULTS: Sixteen (22.8%) adenomas were found to have allelic loss, of which 11 (15.7%) had p53 mutations. In adenomas with mild, moderate, or severe dysplasia, mutation or allelic loss occurred in 4.8%, 16.7%, and 52.6%, respectively (p&lt;0.001). Seven different mutations were found, all missense changes or inframe deletions: one (Thr150Arg) has not been found before while three (Gln144His, Gly245Arg, and Glu285Gln) have not been described previously in colorectal tumours. The other three mutations (Arg175Gly, DeltaPro190, and Gly245Ser) have been found in colorectal carcinomas, the last commonly. Adenomas harboured a spectrum of p53 mutations which was significantly different from cancers as regards the position in the gene and a higher frequency of G-->C/C-->G changes. CONCLUSIONS: Combining our data on adenomas with data already published and in comparison with the spectrum of mutations in colorectal carcinomas, it is suggested that some p53 mutations have a weaker effect than others and are therefore more likely to be found in adenomas which have not progressed to carcinomas.

Published
2002

8. Frequency of germline hereditary non-polyposis colorectal cancer gene mutations in patients with multiple or early onset colorectal adenomas.

Author

E, Beck N, P, Tomlinson I, F, Homfray T, M, Frayling I, V, Hodgson S, and F, Bodmer W

Abstract

BACKGROUND: The hereditary non-polyposis colorectal cancer (HNPCC) syndrome is caused by germline mutations in mismatch repair genes and predisposes individuals to cancers of the colon and other specific sites. On theoretical grounds, it is expected that patients with HNPCC also develop more colorectal adenomas than the general population. In essence, if the mutation rate is raised owing to mutations at a mismatch repair locus, more mutations are expected at loci such as APC (adenomatous polyposis coli) and more adenomas will start to grow. Not all data support this expectation, however. AIM: To search for germline mutations at HNPCC loci in patients with multiple adenomas. SUBJECTS: Twenty five patients (without known APC mutations) who have developed colorectal adenomas in unusually large numbers and, in some cases, at an early age. METHODS: Germline APC mutations were excluded using the protein truction test for exon 15 and mismatch chemical cleavage analysis for remaining exons. Germline HNPCC mutations were detected by using PCR and single strand conformation polymorphism analysis. RESULTS: Just one germline HNPCC mutation was found (4% of cases) and this was of uncertain functional effect. CONCLUSIONS: In general, germline HNPCC mutations are not responsible for the phenotype of patients with multiple colonic adenomas. It is possible that patients with HNPCC tend to develop adenomas more frequently and earlier than the general population, but that this effect is relatively subtle. These results suggest that individuals with colorectal adenomas only should not strictly be classified as "affected" in HNPCC families (although they should certainly not be classified as "unaffected" either and may warrant intensive screening). In the absence of a personal or strong family history of colorectal cancer, it is probably not worthwhile performing diagnostic or predictive genetic testing for HNPCC mutations in subjects with colorectal adenomas. Although undetected APC mutations may be responsible for some of the phenotypes in this sample, as yet uncharacterised adenoma predisposing genes probably exist.

Published
1997

9. Use of SSCP analysis to identify germline mutations in HNPCC families fulfilling the Amsterdam criteria

Author

Beck, N. E., Tomlinson, I. P. M., Homfray, Tessa, Frayling, I., Hodgson, Shirley V., Harocopos, Chris, and Bodmer, Walter F.

Abstract

Abstract: Hereditary non-polyposis colorectal cancer (HNPCC) is a clinical syndrome characterised by an inherited predisposition to early onset colorectal and uterine cancers and an increased incidence of other cancers. It is caused by germline defects in the human mismatch repair genes. Defects in two of the known mismatch repair genes (namely hMSH2 and hMLH1) account for over 90% of mutations found in HNPCC families. In this study we have identified 14 families that fulfilled the clinical criteria for HNPCC and screened the hMSH2 and hMLH1 genes for germline mutations using single-strand conformational polymorphism (SSCP) analysis and DNA sequencing. Seven mutations were identified. Of these, there were five frameshifts, one missense mutation and a further novel mutation that involved separate transition and transversion changes in successive amino acid residues. Three of the mutations were in hMSH2 and four in hMLH1. The identification of germ-line mutations in an HNPCC family enables targeted surveillance and the possibility of early curative intervention. SSCP is a simple and effective method for identifying most mutations in the human mismatch repair genes using DNA from fresh, frozen or archival material.

Published
1997
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