Investigating splicing variants uncovered by next-generation sequencing the Alzheimer’s disease candidate genes, CLU, PICALM, CR1, ABCA7, BIN1, the MS4A locus, CD2AP, EPHA1 and CD33
Late onset Alzheimer’s disease (LOAD), the most common cause of late onset dementia, has a strong genetic component. To date, 21 disease-risk loci have been identified through genome wide association studies (GWAS). However, the causative functional variant(s) within these loci are yet to be discove...
| Main Authors: | , , , , , , , , , , , , , , , , , |
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OMICS International
2016
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| Online Access: | https://eprints.nottingham.ac.uk/38399/ |
| _version_ | 1848795602729566208 |
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| author | Clement, Naomi Braae, Anne Turton, James Lord, Jenny Guetta-Baranes, Tamar Medway, Christopher Brookes, Keeley Barber, Imelda S. Patel, Tulsi Milla, Lucy Azzopardi, Maria Lowe, James Mann, David Pickering-Brown, Stuart Kalsheker, Noor Passmore, Peter Chappell, Sally Morgan, Kevin |
| author_facet | Clement, Naomi Braae, Anne Turton, James Lord, Jenny Guetta-Baranes, Tamar Medway, Christopher Brookes, Keeley Barber, Imelda S. Patel, Tulsi Milla, Lucy Azzopardi, Maria Lowe, James Mann, David Pickering-Brown, Stuart Kalsheker, Noor Passmore, Peter Chappell, Sally Morgan, Kevin |
| author_sort | Clement, Naomi |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Late onset Alzheimer’s disease (LOAD), the most common cause of late onset dementia, has a strong genetic component. To date, 21 disease-risk loci have been identified through genome wide association studies (GWAS). However, the causative functional variant(s) within these loci are yet to be discovered. This study aimed to identify potential functional splicing mutations in the nine original GWAS-risk genes: CLU, PICALM, CR1, ABCA7, BIN1, the MS4A locus, CD2AP, EPHA1 and CD33. Target enriched next generation sequencing (NGS) was used to resequence the entire genetic region for each of these GWAS-risk loci in 96 LOAD patients and in silico databases were used to annotate the variants for functionality. Predicted splicing variants were further functionally characterised using splicing prediction software and minigene splicing assays. Following in silico annotation, 21 variants were predicted to influence splicing and, upon further annotation, four of these were examined utilising the in vitro minigene assay. Two variants, rs881768 A>G in ABCA7 and a novel variant 11: 60179827 T>G in MS4A6A were shown, in these cell assays, to affect the splicing of these genes. The method employed in the paper successfully identified potential splicing variants in GWAS-risk genes. Further investigation will be needed to understand the full effect of these variants on LOAD risk. However, these results suggest a possible pipeline in order to identify putative functional variants as a result of NGS in disease-associated loci although improvements are needed within the current prediction programme in order to reduce the number of false positives. |
| first_indexed | 2025-11-14T19:34:42Z |
| format | Article |
| id | nottingham-38399 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:34:42Z |
| publishDate | 2016 |
| publisher | OMICS International |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-383992020-05-04T18:14:59Z https://eprints.nottingham.ac.uk/38399/ Investigating splicing variants uncovered by next-generation sequencing the Alzheimer’s disease candidate genes, CLU, PICALM, CR1, ABCA7, BIN1, the MS4A locus, CD2AP, EPHA1 and CD33 Clement, Naomi Braae, Anne Turton, James Lord, Jenny Guetta-Baranes, Tamar Medway, Christopher Brookes, Keeley Barber, Imelda S. Patel, Tulsi Milla, Lucy Azzopardi, Maria Lowe, James Mann, David Pickering-Brown, Stuart Kalsheker, Noor Passmore, Peter Chappell, Sally Morgan, Kevin Late onset Alzheimer’s disease (LOAD), the most common cause of late onset dementia, has a strong genetic component. To date, 21 disease-risk loci have been identified through genome wide association studies (GWAS). However, the causative functional variant(s) within these loci are yet to be discovered. This study aimed to identify potential functional splicing mutations in the nine original GWAS-risk genes: CLU, PICALM, CR1, ABCA7, BIN1, the MS4A locus, CD2AP, EPHA1 and CD33. Target enriched next generation sequencing (NGS) was used to resequence the entire genetic region for each of these GWAS-risk loci in 96 LOAD patients and in silico databases were used to annotate the variants for functionality. Predicted splicing variants were further functionally characterised using splicing prediction software and minigene splicing assays. Following in silico annotation, 21 variants were predicted to influence splicing and, upon further annotation, four of these were examined utilising the in vitro minigene assay. Two variants, rs881768 A>G in ABCA7 and a novel variant 11: 60179827 T>G in MS4A6A were shown, in these cell assays, to affect the splicing of these genes. The method employed in the paper successfully identified potential splicing variants in GWAS-risk genes. Further investigation will be needed to understand the full effect of these variants on LOAD risk. However, these results suggest a possible pipeline in order to identify putative functional variants as a result of NGS in disease-associated loci although improvements are needed within the current prediction programme in order to reduce the number of false positives. OMICS International 2016-10-29 Article PeerReviewed Clement, Naomi, Braae, Anne, Turton, James, Lord, Jenny, Guetta-Baranes, Tamar, Medway, Christopher, Brookes, Keeley, Barber, Imelda S., Patel, Tulsi, Milla, Lucy, Azzopardi, Maria, Lowe, James, Mann, David, Pickering-Brown, Stuart, Kalsheker, Noor, Passmore, Peter, Chappell, Sally and Morgan, Kevin (2016) Investigating splicing variants uncovered by next-generation sequencing the Alzheimer’s disease candidate genes, CLU, PICALM, CR1, ABCA7, BIN1, the MS4A locus, CD2AP, EPHA1 and CD33. Journal of Alzheimers Disease & Parkinsonism, 6 (6). pp. 1-7. ISSN 2161-0460 Late onset Alzheimer’s disease; Next generation sequencing; Splicing; Annotation; Functional variations; Minigene assays https://www.omicsonline.org/open-access/investigating-splicing-variants-uncovered-by-nextgeneration-sequencingthe-alzheimers-disease-candidate-genes-clu-picalm-cr1-abca7b-2161-0460-1000276.php?aid=82714 doi: 10.4172/2161-0460.1000276 doi: 10.4172/2161-0460.1000276 |
| spellingShingle | Late onset Alzheimer’s disease; Next generation sequencing; Splicing; Annotation; Functional variations; Minigene assays Clement, Naomi Braae, Anne Turton, James Lord, Jenny Guetta-Baranes, Tamar Medway, Christopher Brookes, Keeley Barber, Imelda S. Patel, Tulsi Milla, Lucy Azzopardi, Maria Lowe, James Mann, David Pickering-Brown, Stuart Kalsheker, Noor Passmore, Peter Chappell, Sally Morgan, Kevin Investigating splicing variants uncovered by next-generation sequencing the Alzheimer’s disease candidate genes, CLU, PICALM, CR1, ABCA7, BIN1, the MS4A locus, CD2AP, EPHA1 and CD33 |
| title | Investigating splicing variants uncovered by next-generation sequencing the Alzheimer’s disease candidate genes, CLU, PICALM, CR1, ABCA7, BIN1, the MS4A locus, CD2AP, EPHA1 and CD33 |
| title_full | Investigating splicing variants uncovered by next-generation sequencing the Alzheimer’s disease candidate genes, CLU, PICALM, CR1, ABCA7, BIN1, the MS4A locus, CD2AP, EPHA1 and CD33 |
| title_fullStr | Investigating splicing variants uncovered by next-generation sequencing the Alzheimer’s disease candidate genes, CLU, PICALM, CR1, ABCA7, BIN1, the MS4A locus, CD2AP, EPHA1 and CD33 |
| title_full_unstemmed | Investigating splicing variants uncovered by next-generation sequencing the Alzheimer’s disease candidate genes, CLU, PICALM, CR1, ABCA7, BIN1, the MS4A locus, CD2AP, EPHA1 and CD33 |
| title_short | Investigating splicing variants uncovered by next-generation sequencing the Alzheimer’s disease candidate genes, CLU, PICALM, CR1, ABCA7, BIN1, the MS4A locus, CD2AP, EPHA1 and CD33 |
| title_sort | investigating splicing variants uncovered by next-generation sequencing the alzheimer’s disease candidate genes, clu, picalm, cr1, abca7, bin1, the ms4a locus, cd2ap, epha1 and cd33 |
| topic | Late onset Alzheimer’s disease; Next generation sequencing; Splicing; Annotation; Functional variations; Minigene assays |
| url | https://eprints.nottingham.ac.uk/38399/ https://eprints.nottingham.ac.uk/38399/ https://eprints.nottingham.ac.uk/38399/ |