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J. P. Pearson

Bio: J. P. Pearson is an academic researcher from Cardiff University. The author has contributed to research in topics: Genome-wide association study & Haplotype. The author has an hindex of 5, co-authored 5 publications receiving 3982 citations.

Papers
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Journal ArticleDOI
Alan E. Renton1, Elisa Majounie1, Adrian James Waite2, Javier Simón-Sánchez3, Javier Simón-Sánchez4, Sara Rollinson5, J. Raphael Gibbs1, J. Raphael Gibbs6, Jennifer C. Schymick1, Hannu Laaksovirta7, John C. van Swieten4, John C. van Swieten3, Liisa Myllykangas7, Hannu Kalimo7, Anders Paetau7, Yevgeniya Abramzon1, Anne M. Remes8, Alice Kaganovich1, Sonja W. Scholz9, Sonja W. Scholz10, Sonja W. Scholz1, Jamie Duckworth1, Jinhui Ding1, Daniel W. Harmer11, Dena G. Hernandez1, Dena G. Hernandez6, Janel O. Johnson6, Janel O. Johnson1, Kin Y. Mok6, Mina Ryten6, Danyah Trabzuni6, Rita Guerreiro6, Richard W. Orrell6, James Neal2, Alexandra Murray12, J. P. Pearson2, Iris E. Jansen3, David Sondervan3, Harro Seelaar4, Derek J. Blake2, Kate Young5, Nicola Halliwell5, Janis Bennion Callister5, Greg Toulson5, Anna Richardson5, Alexander Gerhard5, Julie S. Snowden5, David M. A. Mann5, David Neary5, Mike A. Nalls1, Terhi Peuralinna7, Lilja Jansson7, Veli-Matti Isoviita7, Anna-Lotta Kaivorinne8, Maarit Hölttä-Vuori7, Elina Ikonen7, Raimo Sulkava13, Michael Benatar14, Joanne Wuu14, Adriano Chiò15, Gabriella Restagno, Giuseppe Borghero16, Mario Sabatelli17, David Heckerman18, Ekaterina Rogaeva19, Lorne Zinman19, Jeffrey D. Rothstein9, Michael Sendtner20, Carsten Drepper20, Evan E. Eichler21, Can Alkan21, Ziedulla Abdullaev1, Svetlana Pack1, Amalia Dutra1, Evgenia Pak1, John Hardy6, Andrew B. Singleton1, Nigel Williams2, Peter Heutink3, Stuart Pickering-Brown5, Huw R. Morris2, Huw R. Morris12, Huw R. Morris22, Pentti J. Tienari7, Bryan J. Traynor1, Bryan J. Traynor9 
20 Oct 2011-Neuron
TL;DR: The chromosome 9p21 amyotrophic lateral sclerosis-frontotemporal dementia (ALS-FTD) locus contains one of the last major unidentified autosomal-dominant genes underlying these common neurodegenerative diseases, and a large hexanucleotide repeat expansion in the first intron of C9ORF72 is shown.

3,784 citations

Journal ArticleDOI
Vincent Plagnol1, Mike A. Nalls2, Jose Bras1, Dena G. Hernandez2, Dena G. Hernandez1, M. Sharma3, Una-Marie Sheerin1, Mohamad Saad3, Javier Simón-Sánchez, Claudia Schulte, Suzanne Lesage4, Suzanne Lesage3, Sigurlaug Sveinbjörnsdóttir5, Philippe Amouyel6, Philippe Amouyel3, S. Arepalli1, Roger A. Barker7, C. Bellinguez8, Yoav Ben-Shlomo9, Henk W. Berendse10, Daniela Berg, Kailash P. Bhatia1, R. M. A. de Bie11, Alessandro Biffi12, Alessandro Biffi13, B.R. Bloem14, Zoltán Bochdanovits, Michael Bonin, Knut Brockmann, J. Brooks1, David J. Burn15, Gavin Charlesworth1, Honglei Chen, Patrick F. Chinnery15, Sean Chong2, Carl E Clarke16, Carl E Clarke17, Mark R. Cookson2, J. M. Cooper1, Jean-Christophe Corvol, Carl Counsell18, P. Damier, J. F. Dartigues3, Panagiotis Deloukas19, Günther Deuschl20, David T. Dexter21, K.D. van Dijk, Allissa Dillman2, F. Durif, Alexandra Durr, Sarah Edkins19, Jonathan R. Evans7, Thomas Foltynie, Colin Freeman8, Jianjun Gao, M. Gardner1, J. R. Gibbs2, J. R. Gibbs1, A. Goate22, Emma Gray19, Rita Guerreiro1, O. Gustafsson23, Clare Elizabeth Harris18, Garrett Hellenthal8, J.J. van Hilten24, Albert Hofman25, Albert R. Hollenbeck, Janice L. Holton1, Michele T.M. Hu, X. Huang26, Heiko Huber, Gavin Hudson15, Sarah E. Hunt19, J. Huttenlocher3, Thomas Illig, Palmi V. Jonsson, Cordelia Langford7, Andrew J. Lees1, Peter Lichtner, Patricia Limousin1, Grisel Lopez2, Delia Lorenz20, Alisdair McNeill1, C. Moorby17, Matthew Moore2, Huw R. Morris27, Karen E. Morrison17, Karen E. Morrison16, Ese E. Mudanohwo1, Sean S. O'Sullivan1, J. P. Pearson27, R. Pearson8, Joel S. Perlmutter22, H. Petursson23, Matti Pirinen8, Pierre Pollak, Bart Post14, Simon C. Potter19, Bernard Ravina28, Tamas Revesz1, O. Riess, Fernando Rivadeneira25, Patrizia Rizzu, Mina Ryten1, Stephen Sawcer7, Peter Heutink, Nicholas W. Wood1 
TL;DR: Using a dataset of post-mortem brain samples assayed for gene expression and methylation, methylation and expression changes associated with PD risk variants in PARK16/1q32, GPNMB/7p15, and STX1B/16p11 loci are identified, suggesting potential molecular mechanisms and candidate genes at these risk loci.
Abstract: A previous genome-wide association (GWA) meta-analysis of 12,386 PD cases and 21,026 controls conducted by the International Parkinson's Disease Genomics Consortium (IPDGC) discovered or confirmed 11 Parkinson's disease (PD) loci. This first analysis of the two-stage IPDGC study focused on the set of loci that passed genome-wide significance in the first stage GWA scan. However, the second stage genotyping array, the ImmunoChip, included a larger set of 1,920 SNPs selected on the basis of the GWA analysis. Here, we analyzed this set of 1,920 SNPs, and we identified five additional PD risk loci (combined p<5x10(-10), PARK16/1q32, STX1B/16p11, FGF20/8p22, STBD1/4q21, and GPNMB/7p15). Two of these five loci have been suggested by previous association studies (PARK16/1q32, FGF20/8p22), and this study provides further support for these findings. Using a dataset of post-mortem brain samples assayed for gene expression (n = 399) and methylation (n = 292), we identified methylation and expression changes associated with PD risk variants in PARK16/1q32, GPNMB/7p15, and STX1B/16p11 loci, hence suggesting potential molecular mechanisms and candidate genes at these risk loci.

283 citations

Journal ArticleDOI
TL;DR: A genome-wide association study in 1705 Parkinson's disease UK patients and 5175 UK controls, the largest sample size so far for a PD GWAS, found weak but consistent evidence of association for common variants located in three previously published associated regions.
Abstract: We performed a genome-wide association study (GWAS) in 1705 Parkinson's disease (PD) UK patients and 5175 UK controls, the largest sample size so far for a PD GWAS. Replication was attempted in an additional cohort of 1039 French PD cases and 1984 controls for the 27 regions showing the strongest evidence of association (P< 10(-4)). We replicated published associations in the 4q22/SNCA and 17q21/MAPT chromosome regions (P< 10(-10)) and found evidence for an additional independent association in 4q22/SNCA. A detailed analysis of the haplotype structure at 17q21 showed that there are three separate risk groups within this region. We found weak but consistent evidence of association for common variants located in three previously published associated regions (4p15/BST1, 4p16/GAK and 1q32/PARK16). We found no support for the previously reported SNP association in 12q12/LRRK2. We also found an association of the two SNPs in 4q22/SNCA with the age of onset of the disease.

223 citations

Journal ArticleDOI
TL;DR: This study screened 136 EOPD probands from a high‐ascertainment regional and community‐based prevalence study for pathogenic mutations in PARK2 (parkin), PINK1, PARK7 (DJ‐1), and exon 41 of LRRK2 and shows an increased likelihood of mutations in patients with lower AAO, family history, or parental consanguinity.
Abstract: Approximately 3.6% of patients with Parkinson's disease develop symptoms before age 45. Early-onset Parkinson's disease (EOPD) patients have a higher familial recurrence risk than late-onset patients, and 3 main recessive EOPD genes have been described. We aimed to establish the prevalence of mutations in these genes in a UK cohort and in previous studies. We screened 136 EOPD probands from a high-ascertainment regional and community-based prevalence study for pathogenic mutations in PARK2 (parkin), PINK1, PARK7 (DJ-1), and exon 41 of LRRK2. We also carried out a systematic review, calculating the proportion of cases with pathogenic mutations in previously reported studies. We identified 5 patients with pathogenic PARK2, 1 patient with PINK1, and 1 with LRRK2 mutations. The rate of mutations overall was 5.1%. Mutations were more common in patients with age at onset (AAO) 5800 unique cases. Overall, the weighted mean proportion of cases with PARK2 (parkin), PINK1, and PARK7 (DJ-1) mutations was 8.6%, 3.7%, and 0.4%, respectively. PINK1 mutations were more common in Asian subjects. The overall frequency of mutations in known EOPD genes was lower than previously estimated. Our study shows an increased likelihood of mutations in patients with lower AAO, family history, or parental consanguinity.

134 citations

Journal ArticleDOI
TL;DR: The clinical phenotype and pathology of a large family with autosomal dominant FTD/ALS with nine affected members originating from Gwent in South Wales, UK is described and a large 4.8-megabase haplotype on chromosome 9p21 is identified, which was shared by all affected family members.
Abstract: Families with autosomal dominant frontotemporal dementia and amyotrophic lateral sclerosis (FTD/ALS) have previously been linked to a locus on chromosome 9p21. We describe the clinical phenotype and pathology of a large family with autosomal dominant FTD/ALS with nine affected members originating from Gwent in South Wales, UK. We also further refine the locus on chromosome 9p21 using a haplotype sharing approach and assess heterogeneity in 9p21 linked families. Within this family, affected individuals present with either FTD or ALS or both diseases simultaneously. In addition there was marked phenotypic variation including ataxia, Parkinsonism, psychosis and visuo-spatial cognitive deficits. The pathological features of the three cases described were consistent with type 2 FTD pathology, as previously reported in similar families. However, we also report distinctive cerebellar and glial pathology and a significant proportion of TDP-43 negative inclusions. No mutations in known genes for FTD or ALS were found. We identified a large 4.8-megabase haplotype on chromosome 9p21, which was shared by all affected family members. This haplotype overlaps and limits the previously reported FTD/ALS linkage region on chromosome 9p21. Sequencing of this region did not identify any evidence of a pathogenic exonic mutation. This suggests that the pathogenic change affects non-coding DNA and that the disease is caused by variation in gene or protein expression.

91 citations


Cited by
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Journal ArticleDOI
Alan E. Renton1, Elisa Majounie1, Adrian James Waite2, Javier Simón-Sánchez3, Javier Simón-Sánchez4, Sara Rollinson5, J. Raphael Gibbs1, J. Raphael Gibbs6, Jennifer C. Schymick1, Hannu Laaksovirta7, John C. van Swieten4, John C. van Swieten3, Liisa Myllykangas7, Hannu Kalimo7, Anders Paetau7, Yevgeniya Abramzon1, Anne M. Remes8, Alice Kaganovich1, Sonja W. Scholz9, Sonja W. Scholz10, Sonja W. Scholz1, Jamie Duckworth1, Jinhui Ding1, Daniel W. Harmer11, Dena G. Hernandez1, Dena G. Hernandez6, Janel O. Johnson1, Janel O. Johnson6, Kin Y. Mok6, Mina Ryten6, Danyah Trabzuni6, Rita Guerreiro6, Richard W. Orrell6, James Neal2, Alexandra Murray12, J. P. Pearson2, Iris E. Jansen4, David Sondervan4, Harro Seelaar3, Derek J. Blake2, Kate Young5, Nicola Halliwell5, Janis Bennion Callister5, Greg Toulson5, Anna Richardson5, Alexander Gerhard5, Julie S. Snowden5, David M. A. Mann5, David Neary5, Mike A. Nalls1, Terhi Peuralinna7, Lilja Jansson7, Veli-Matti Isoviita7, Anna-Lotta Kaivorinne8, Maarit Hölttä-Vuori7, Elina Ikonen7, Raimo Sulkava13, Michael Benatar14, Joanne Wuu14, Adriano Chiò15, Gabriella Restagno, Giuseppe Borghero16, Mario Sabatelli17, David Heckerman18, Ekaterina Rogaeva19, Lorne Zinman19, Jeffrey D. Rothstein9, Michael Sendtner20, Carsten Drepper20, Evan E. Eichler21, Can Alkan21, Ziedulla Abdullaev1, Svetlana Pack1, Amalia Dutra1, Evgenia Pak1, John Hardy6, Andrew B. Singleton1, Nigel Williams2, Peter Heutink4, Stuart Pickering-Brown5, Huw R. Morris22, Huw R. Morris2, Huw R. Morris12, Pentti J. Tienari7, Bryan J. Traynor9, Bryan J. Traynor1 
20 Oct 2011-Neuron
TL;DR: The chromosome 9p21 amyotrophic lateral sclerosis-frontotemporal dementia (ALS-FTD) locus contains one of the last major unidentified autosomal-dominant genes underlying these common neurodegenerative diseases, and a large hexanucleotide repeat expansion in the first intron of C9ORF72 is shown.

3,784 citations

Journal ArticleDOI
10 Aug 2011-Nature
TL;DR: In this article, a collaborative GWAS involving 9,772 cases of European descent collected by 23 research groups working in 15 different countries, they have replicated almost all of the previously suggested associations and identified at least a further 29 novel susceptibility loci.
Abstract: Multiple sclerosis is a common disease of the central nervous system in which the interplay between inflammatory and neurodegenerative processes typically results in intermittent neurological disturbance followed by progressive accumulation of disability. Epidemiological studies have shown that genetic factors are primarily responsible for the substantially increased frequency of the disease seen in the relatives of affected individuals, and systematic attempts to identify linkage in multiplex families have confirmed that variation within the major histocompatibility complex (MHC) exerts the greatest individual effect on risk. Modestly powered genome-wide association studies (GWAS) have enabled more than 20 additional risk loci to be identified and have shown that multiple variants exerting modest individual effects have a key role in disease susceptibility. Most of the genetic architecture underlying susceptibility to the disease remains to be defined and is anticipated to require the analysis of sample sizes that are beyond the numbers currently available to individual research groups. In a collaborative GWAS involving 9,772 cases of European descent collected by 23 research groups working in 15 different countries, we have replicated almost all of the previously suggested associations and identified at least a further 29 novel susceptibility loci. Within the MHC we have refined the identity of the HLA-DRB1 risk alleles and confirmed that variation in the HLA-A gene underlies the independent protective effect attributable to the class I region. Immunologically relevant genes are significantly overrepresented among those mapping close to the identified loci and particularly implicate T-helper-cell differentiation in the pathogenesis of multiple sclerosis.

2,511 citations

01 Jan 2011
TL;DR: The sheer volume and scope of data posed by this flood of data pose a significant challenge to the development of efficient and intuitive visualization tools able to scale to very large data sets and to flexibly integrate multiple data types, including clinical data.
Abstract: Rapid improvements in sequencing and array-based platforms are resulting in a flood of diverse genome-wide data, including data from exome and whole-genome sequencing, epigenetic surveys, expression profiling of coding and noncoding RNAs, single nucleotide polymorphism (SNP) and copy number profiling, and functional assays. Analysis of these large, diverse data sets holds the promise of a more comprehensive understanding of the genome and its relation to human disease. Experienced and knowledgeable human review is an essential component of this process, complementing computational approaches. This calls for efficient and intuitive visualization tools able to scale to very large data sets and to flexibly integrate multiple data types, including clinical data. However, the sheer volume and scope of data pose a significant challenge to the development of such tools.

2,187 citations

Journal ArticleDOI
TL;DR: This article conducted a meta-analysis of Parkinson's disease genome-wide association studies using a common set of 7,893,274 variants across 13,708 cases and 95,282 controls.
Abstract: We conducted a meta-analysis of Parkinson's disease genome-wide association studies using a common set of 7,893,274 variants across 13,708 cases and 95,282 controls. Twenty-six loci were identified as having genome-wide significant association; these and 6 additional previously reported loci were then tested in an independent set of 5,353 cases and 5,551 controls. Of the 32 tested SNPs, 24 replicated, including 6 newly identified loci. Conditional analyses within loci showed that four loci, including GBA, GAK-DGKQ, SNCA and the HLA region, contain a secondary independent risk variant. In total, we identified and replicated 28 independent risk variants for Parkinson's disease across 24 loci. Although the effect of each individual locus was small, risk profile analysis showed substantial cumulative risk in a comparison of the highest and lowest quintiles of genetic risk (odds ratio (OR) = 3.31, 95% confidence interval (CI) = 2.55–4.30; P = 2 × 10−16). We also show six risk loci associated with proximal gene expression or DNA methylation.

1,636 citations