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2 results on '"Copley R"'

1. NOX1 loss-of-function genetic variants in patients with inflammatory bowel disease

Author

Schwerd, T., Bryant, R. V., Pandey, S., Capitani, M., Meran, L., Cazier, J. -B., Jung, J., Mondal, K., Parkes, M., Mathew, C. G., Fiedler, K., McCarthy, D. J., Sullivan, P. B., Rodrigues, A., Travis, S. P. L., Moore, C., Sambrook, J., Ouwehand, W. H., Roberts, D. J., Danesh, J., Russell, R. K., Wilson, D. C., Kelsen, J. R., Cornall, R., Denson, L. A., Kugathasan, S., Knaus, U. G., Serra, E. G., Anderson, C. A., Duerr, R. H., McGovern, D. P. B., Cho, J., Powrie, Fiona, Li, V. S. W., Muise, A. M., Uhlig, H. H., Donnelly, P., Bell, J., Bentley, D., McVean, G., Ratcliffe, P., Taylor, J., Wilkie, A. O. M., Broxholme, J., Buck, D., Gregory, L., Gregory, J., Lunter, G., Tomlinson, I., Allan, C., Attar, M., Green, A., Humphray, S., Kingsbury, Z., Lamble, S., Lonie, L., Pagnamenta, A., Piazza, P., Polanco, G., Trebes, A., Copley, R., Fiddy, S., Grocock, R., Hatton, E., Holmes, C., Hughes, L., Humburg, P., Kanapin, A., Lise, S., Martin, H., Murray, L., McCarthy, D., Rimmer, A., Sahgal, N., Wright, B., Yau, C., Arancibia, Carolina, Bailey, Adam, Barnes, Ellie, Bird-Lieberman, Beth, Brain, Oliver, Braden, Barbara, Collier, Jane, East, James, Geremia, Alessandra, Howarth, Lucy, Keshav, Satish, Klenerman, Paul, Leedham, Simon, Palmer, Rebecca, Rodrigues, Astor, Simmons, Alison, Sullivan, Peter B, Travis, Simon P L, Uhlig, Holm H, Heuschkel, Rob, Zilbauer, Matthias, Auth, Marcus K. H., Shah, Neil, Kammermeier, Jochen, Croft, Nick, Barakat, Farah, Russell, Richard K., Wilson, David C., Henderson, Paul, Braegger, Christian P., Posovszky, Carsten, Fyderek, Krzysztof, Wedrychowicz, Andrzej, Zurek, Marlen, Strisciuglio, Caterina, Elawad, Mamoun, Lo, Bernice, Parkes, Miles, Satsangi, Jack, Anderson, Carl A., Jostins, L., Kennedy, N. A., Lamb, C. A., Ahmad, T., Edwards, C., Hart, A., Hawkey, C., Mansfield, J. C., Mowat, C., Newman, W. G., Satsangi, J., Simmons, A., Tremelling, M., Lee, J. C., Prescott, N. J., Lees, C. W., Barrett, J. C., UK IBD Genetics Consortium, COLORS in IBD, Oxford IBD cohort study investigators, WGS500 Consortium, INTERVAL Study, Schwerd, T., Bryant, R. V., Pandey, S., Capitani, M., Meran, L., Cazier, J. -B., Jung, J., Mondal, K., Parkes, M., Mathew, C. G., Fiedler, K., Mccarthy, D. J., Sullivan, P. B., Rodrigues, A., Travis, S. P. L., Moore, C., Sambrook, J., Ouwehand, W. H., Roberts, D. J., Danesh, J., Russell, R. K., Wilson, D. C., Kelsen, J. R., Cornall, R., Denson, L. A., Kugathasan, S., Knaus, U. G., Serra, E. G., Anderson, C. A., Duerr, R. H., Mcgovern, D. P. B., Cho, J., Powrie, Fiona, Li, V. S. W., Muise, A. M., Uhlig, H. H., Donnelly, P., Bell, J., Bentley, D., Mcvean, G., Ratcliffe, P., Taylor, J., Wilkie, A. O. M., Broxholme, J., Buck, D., Gregory, L., Gregory, J., Lunter, G., Tomlinson, I., Allan, C., Attar, M., Green, A., Humphray, S., Kingsbury, Z., Lamble, S., Lonie, L., Pagnamenta, A., Piazza, P., Polanco, G., Trebes, A., Copley, R., Fiddy, S., Grocock, R., Hatton, E., Holmes, C., Hughes, L., Humburg, P., Kanapin, A., Lise, S., Martin, H., Murray, L., Mccarthy, D., Rimmer, A., Sahgal, N., Wright, B., Yau, C., Arancibia, Carolina, Bailey, Adam, Barnes, Ellie, Bird-Lieberman, Beth, Brain, Oliver, Braden, Barbara, Collier, Jane, East, Jame, Geremia, Alessandra, Howarth, Lucy, Keshav, Satish, Klenerman, Paul, Leedham, Simon, Palmer, Rebecca, Rodrigues, Astor, Simmons, Alison, Sullivan, Peter B, Travis, Simon P L, Uhlig, Holm H, Heuschkel, Rob, Zilbauer, Matthia, Auth, Marcus K. H., Shah, Neil, Kammermeier, Jochen, Croft, Nick, Barakat, Farah, Russell, Richard K., Wilson, David C., Henderson, Paul, Braegger, Christian P., Posovszky, Carsten, Fyderek, Krzysztof, Wedrychowicz, Andrzej, Zurek, Marlen, Strisciuglio, Caterina, Elawad, Mamoun, Lo, Bernice, Parkes, Mile, Satsangi, Jack, Anderson, Carl A., Jostins, L., Kennedy, N. A., Lamb, C. A., Ahmad, T., Edwards, C., Hart, A., Hawkey, C., Mansfield, J. C., Mowat, C., Newman, W. G., Satsangi, J., Simmons, A., Tremelling, M., Lee, J. C., Prescott, N. J., Lees, C. W., Barrett, J. C., UK IBD Genetics, Consortium, COLORS in, Ibd, Oxford IBD cohort study, Investigator, Wgs500, Consortium, and Interval, Study

Subjects
Male, Genotype, Colon, Immunology, Mutation, Missense, Genetic Association Studie, Polymorphism, Single Nucleotide, Article, Mice, Animals, Humans, Immunology and Allergy, Genetic Predisposition to Disease, Child, Genetic Association Studies, Genes, Modifier, Genome, Animal, Inflammatory Bowel Disease, High-Throughput Nucleotide Sequencing, Inflammatory Bowel Diseases, digestive system diseases, Host-Pathogen Interaction, Mice, Inbred C57BL, Child, Preschool, Host-Pathogen Interactions, NADPH Oxidase 1, Reactive Oxygen Species, Reactive Oxygen Specie, Human
Abstract

Genetic defects that affect intestinal epithelial barrier function can present with very early-onset inflammatory bowel disease (VEOIBD). Using whole-genome sequencing, a novel hemizygous defect in NOX1 encoding NAPDH oxidase 1 was identified in a patient with ulcerative colitis-like VEOIBD. Exome screening of 1,878 pediatric patients identified further seven male inflammatory bowel disease (IBD) patients with rare NOX1 mutations. Loss-of-function was validated in p.N122H and p.T497A, and to a lesser degree in p.Y470H, p.R287Q, p.I67M, p.Q293R as well as the previously described p.P330S, and the common NOX1 SNP p.D360N (rs34688635) variant. The missense mutation p.N122H abrogated reactive oxygen species (ROS) production in cell lines, ex vivo colonic explants, and patient-derived colonic organoid cultures. Within colonic crypts, NOX1 constitutively generates a high level of ROS in the crypt lumen. Analysis of 9,513 controls and 11,140 IBD patients of non-Jewish European ancestry did not reveal an association between p.D360N and IBD. Our data suggest that loss-of-function variants in NOX1 do not cause a Mendelian disorder of high penetrance but are a context-specific modifier. Our results implicate that variants in NOX1 change brush border ROS within colonic crypts at the interface between the epithelium and luminal microbes.

Published
2018

2. Clinical whole-genome sequencing in severe early-onset epilepsy reveals new genes and improves molecular diagnosis

Author

Martin, H, Kim, G, Pagnamenta, A, Murakami, Y, Carvill, G, Meyer, E, Copley, R, Rimmer, A, Barcia, G, Fleming, MR, Kronengold, J, Brown, MR, Hudspith, K, Broxholme, J, Kanapin, A, Cazier, J, Kinoshita, T, Nabbout, R, Bentley, D, McVean, G, Heavin, S, Zaiwalla, Z, McShane, T, Mefford, H, Shears, D, Stewart, H, Kurian, M, Scheffer, I, Blair, E, Donnelly, P, Kaczmarek, L, and Taylor, J

Subjects
Male, Epilepsy, NAV1.2 Voltage-Gated Sodium Channel, Potassium Channels, High-Throughput Nucleotide Sequencing, Membrane Proteins, Nerve Tissue Proteins, Articles, Potassium Channels, Sodium-Activated, Uniparental Disomy, Young Adult, Child, Preschool, Mutation, Humans, KCNQ2 Potassium Channel, Genetic Predisposition to Disease, Proto-Oncogene Proteins c-cbl, Pathology, Molecular, Child, Chromosomes, Human, Pair 9, Genome-Wide Association Study
Abstract

In severe early-onset epilepsy, precise clinical and molecular genetic diagnosis is complex, as many metabolic and electro-physiological processes have been implicated in disease causation. The clinical phenotypes share many features such as complex seizure types and developmental delay. Molecular diagnosis has historically been confined to sequential testing of candidate genes known to be associated with specific sub-phenotypes, but the diagnostic yield of this approach can be low. We conducted whole-genome sequencing (WGS) on six patients with severe early-onset epilepsy who had previously been refractory to molecular diagnosis, and their parents. Four of these patients had a clinical diagnosis of Ohtahara Syndrome (OS) and two patients had severe non-syndromic early-onset epilepsy (NSEOE). In two OS cases, we found de novo non-synonymous mutations in the genes KCNQ2 and SCN2A. In a third OS case, WGS revealed paternal isodisomy for chromosome 9, leading to identification of the causal homozygous missense variant in KCNT1, which produced a substantial increase in potassium channel current. The fourth OS patient had a recessive mutation in PIGQ that led to exon skipping and defective glycophosphatidyl inositol biosynthesis. The two patients with NSEOE had likely pathogenic de novo mutations in CBL and CSNK1G1, respectively. Mutations in these genes were not found among 500 additional individuals with epilepsy. This work reveals two novel genes for OS, KCNT1 and PIGQ. It also uncovers unexpected genetic mechanisms and emphasizes the power of WGS as a clinical tool for making molecular diagnoses, particularly for highly heterogeneous disorders.

Published
2014

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