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1. Copy-number analysis from genome sequencing data of 11,754 rare-disease parent-child trios: A model for identifying autosomal recessive human gene knockouts including a novel gene for autosomal recessive retinopathy

Author

Eric Olinger, Ian J. Wilson, Sarah Orr, Miguel Barroso-Gil, Ruxandra Neatu, Denize Atan, John A. Sayer, John C. Ambrose, Prabhu Arumugam, Roel Bevers, Marta Bleda, Freya Boardman-Pretty, Christopher R. Boustred, Helen Brittain, Mark J. Caulfield, Georgia C. Chan, Greg Elgar, Tom Fowler, Adam Giess, Angela Hamblin, Shirley Henderson, Tim J.P. Hubbard, Rob Jackson, Louise J. Jones, Dalia Kasperaviciute, Melis Kayikci, Athanasios Kousathanas, Lea Lahnstein, Sarah E.A. Leigh, Ivonne U.S. Leong, Javier F. Lopez, Fiona Maleady-Crowe, Meriel McEntagart, Federico Minneci, Loukas Moutsianas, Michael Mueller, Nirupa Murugaesu, Anna C. Need, Peter O’Donovan, Chris A. Odhams, Christine Patch, Mariana Buongermino Pereira, Daniel Perez-Gil, John Pullinger, Tahrima Rahim, Augusto Rendon, Tim Rogers, Kevin Savage, Kushmita Sawant, Richard H. Scott, Afshan Siddiq, Alexander Sieghart, Samuel C. Smith, Alona Sosinsky, Alexander Stuckey, Mélanie Tanguy, Ana Lisa Taylor Tavares, Ellen R.A. Thomas, Simon R. Thompson, Arianna Tucci, Matthew J. Welland, Eleanor Williams, Katarzyna Witkowska, and Suzanne M. Wood

Subjects
CNV analysis, Genome sequencing, NPHP1, Retinopathy, SLC66A1, Genetics, QH426-470, Medicine
Abstract

Purpose: In parent-child trios with genome sequencing data, we investigated inherited biallelic deletions to identify known and novel genetic disorders. Methods: We developed a copy-number variations analysis pipeline based on autosomal genome sequencing read depth of Genomics England 100,000 Genomes Project data from 11,754 parent-child trios and additional 18,875 non-trios. A control cohort of 15,440 cancer patients provided independent deletion frequencies. Results: Autosomal recessive (AR) modeling detected 34 distinct rare deletions that were homozygous in the proband and heterozygous in both parents. These inherited biallelic deletions were only detected in 52 trios. These “knockout” regions included 37 genes, having among them 8 with an Online Mendelian Inheritance in Man AR annotation. Deletions of NPHP1, followed by OTOA, both within segmental duplications, were the only recurrent findings explaining phenotypes in a total of 10 and 3 patients, respectively. Recurrent heterozygous NPHP1 deletions were detected in 0.3%-0.5% of controls. We reviewed “knockout” patients for the remaining 29 genes without disease associations and identified SLC66A1 as a likely novel cause for AR rod-cone dystrophy in 4 families. Conclusion: A tailored copy-number variations analysis of genome sequencing trio data shows that biallelic inherited gene deletions are rare, with NPHP1 biallelic deletions causing nephronophthisis the leading finding. We propose SLC66A1 as a novel cause for AR retinopathy.

Published
2024
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2. Late-Onset Autosomal Dominant Macular Degeneration Caused by Deletion of the CRX Gene

Author

Samar Yahya, Claire E.L. Smith, James A. Poulter, Martin McKibbin, Gavin Arno, Jamie Ellingford, Kati Kämpjärvi, Muhammad I. Khan, Frans P.M. Cremers, Alison J. Hardcastle, Bruce Castle, David H.W. Steel, Andrew R. Webster, Graeme C. Black, Mohammed E. El-Asrag, Manir Ali, Carmel Toomes, Chris F. Inglehearn, Stuart Ingram, Rachel Taylor, Forbes Manson, Panagiotis Sergouniotis, Nikolas Pontikos, Michael Cheetham, Alessia Fiorentino, Susan Downes, Jing Yu, Stephanie Halford, Suzanne Broadgate, Veronica van Heyningen, John C. Ambrose, Prabhu Arumugam, Roel Bevers, Marta Bleda, Freya Boardman-Pretty, Christopher R. Boustred, Helen Brittain, Mark J. Caulfield, Georgia C. Chan, Greg Elgar, Tom Fowler, Adam Giess, Angela Hamblin, Shirley Henderson, Tim J.P. Hubbard, Rob Jackson, Louise J. Jones, Dalia Kasperaviciute, Melis Kayikci, Athanasios Kousathanas, Lea Lahnstein, Sarah E.A. Leigh, Ivonne U.S. Leong, Javier F. Lopez, Fiona Maleady-Crowe, Meriel McEntagart, Federico Minneci, Loukas Moutsianas, Michael Mueller, Nirupa Murugaesu, Anna C. Need, Peter O’Donovan, Chris A. Odhams, Christine Patch, Mariana Buongermino Pereira, Daniel Perez-Gil, John Pullinger, Tahrima Rahim, Augusto Rendon, Tim Rogers, Kevin Savage, Kushmita Sawant, Richard H. Scott, Afshan Siddiq, Alexander Sieghart, Samuel C. Smith, Alona Sosinsky, Alexander Stuckey, Mélanie Tanguy, Ana Lisa Taylor Tavares, Ellen R.A. Thomas, Simon R. Thompson, Arianna Tucci, Matthew J. Welland, Eleanor Williams, Katarzyna Witkowska, and Suzanne M. Wood

Subjects
Ophthalmology, All institutes and research themes of the Radboud University Medical Center, Sensory disorders Donders Center for Medical Neuroscience [Radboudumc 12]
Abstract

To characterize the phenotype observed in a case series with macular disease and determine the cause.Multicenter case series.Six families (7 patients) with sporadic or multiplex macular disease with onset at 20 to 78 years, and 1 patient with age-related macular degeneration.Patients underwent ophthalmic examination; exome, genome, or targeted sequencing; and/or polymerase chain reaction (PCR) amplification of the breakpoint, followed by cloning and Sanger sequencing or direct Sanger sequencing.Clinical phenotypes, genomic findings, and a hypothesis explaining the mechanism underlying disease in these patients.All 8 cases carried the same deletion encompassing the genes TPRX1, CRX, and SULT2A1, which was absent from 382 control individuals screened by breakpoint PCR and 13 096 Clinical Genetics patients with a range of other inherited conditions screened by array comparative genomic hybridization. Microsatellite genotypes showed that these 7 families are not closely related, but genotypes immediately adjacent to the deletion breakpoints suggest they may share a distant common ancestor.Previous studies had found that carriers for a single defective CRX allele that was predicted to produce no functional CRX protein had a normal ocular phenotype. Here, we show that CRX whole-gene deletion in fact does cause a dominant late-onset macular disease.

Published
2023
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3. SOX11 variants cause a neurodevelopmental disorder with infrequent ocular malformations and hypogonadotropic hypogonadism and with distinct DNA methylation profile

Author

Reem Al-Jawahiri, Aidin Foroutan, Jennifer Kerkhof, Haley McConkey, Michael Levy, Sadegheh Haghshenas, Kathleen Rooney, Jasmin Turner, Debbie Shears, Muriel Holder, Henrietta Lefroy, Bruce Castle, Linda M. Reis, Elena V. Semina, Katherine Lachlan, Kate Chandler, Thomas Wright, Jill Clayton-Smith, Franziska Phan Hug, Nelly Pitteloud, Lucia Bartoloni, Sabine Hoffjan, Soo-Mi Park, Ajay Thankamony, Melissa Lees, Emma Wakeling, Swati Naik, Britta Hanker, Katta M. Girisha, Emanuele Agolini, Zampino Giuseppe, Ziegler Alban, Marine Tessarech, Boris Keren, Alexandra Afenjar, Christiane Zweier, Andre Reis, Thomas Smol, Yoshinori Tsurusaki, Okamoto Nobuhiko, Futoshi Sekiguchi, Naomi Tsuchida, Naomichi Matsumoto, Ikuyo Kou, Yoshiro Yonezawa, Shiro Ikegawa, Bert Callewaert, Megan Freeth, Lotte Kleinendorst, Alan Donaldson, Marielle Alders, Anne De Paepe, Bekim Sadikovic, Alisdair McNeill, Deborah Nickerson, Michael Bamshad, Suzanne Leal, John C. Ambrose, Prabhu Arumugam, Roel Bevers, Marta Bleda, Freya Boardman-Pretty, Christopher R. Boustred, Helen Brittain, Mark J. Caulfield, Georgia C. Chan, Greg Elgar, Tom Fowler, Adam Giess, Angela Hamblin, Shirley Henderson, Tim J.P. Hubbard, Rob Jackson, Louise J. Jones, Dalia Kasperaviciute, Melis Kayikci, Athanasios Kousathanas, Lea Lahnstein, Sarah E.A. Leigh, Ivonne U.S. Leong, Javier F. Lopez, null FionaMaleady-Crowe, Meriel McEntagart, Federico Minneci, Loukas Moutsianas, Michael Mueller, Nirupa Murugaesu, Anna C. Need, Peter O’Donovan, Chris A. Odhams, Christine Patch, Mariana Buongermino Pereira, Daniel Perez-Gil, John Pullinger, null TahrimaRahim, Augusto Rendon, null TimRogers, Kevin Savage, Kushmita Sawant, Richard H. Scott, Afshan Siddiq, Alexander Sieghart, Samuel C. Smith, Alona Sosinsky, Alexander Stuckey, Mélanie Tanguy, Ana Lisa Taylor Tavares, Ellen R.A. Thomas, Simon R. Thompson, Arianna Tucci, Matthew J. Welland, Eleanor Williams, Katarzyna Witkowska, Suzanne M. Wood, Human Genetics, AGEM - Amsterdam Gastroenterology Endocrinology Metabolism, ARD - Amsterdam Reproduction and Development, and ACS - Pulmonary hypertension & thrombosis

Subjects
EXPRESSION, MUTATIONS, FEATURES, Hypogonadism, disorder, DNA Methylation, Genome sequencing, Methylation, Article, SOXC Transcription Factors, Klinefelter Syndrome, Phenotype, Neurodevelopmental disorder, Neurodevelopmental Disorders, Exome Sequencing, SOX11, Medicine and Health Sciences, Neurodevelopmental, Humans, Exome, Genetics (clinical)
Abstract

Purpose: This study aimed to undertake a multidisciplinary characterization of the phenotype associated with SOX11 variants. Methods: Individuals with protein altering variants in SOX11 were identified through exome and genome sequencing and international data sharing. Deep clinical phenotyping was undertaken by referring clinicians. Blood DNA methylation was assessed using Infinium MethylationEPIC array. The expression pattern of SOX11 in developing human brain was defined using RNAscope. Results: We reported 38 new patients with SOX11 variants. Idiopathic hypogonadotropic hypogonadism was confirmed as a feature of SOX11 syndrome. A distinctive pattern of blood DNA methylation was identified in SOX11 syndrome, separating SOX11 syndrome from other BAFopathies. Conclusion: SOX11 syndrome is a distinct clinical entity with characteristic clinical features and episignature differentiating it from BAFopathies. (C) 2022 The Authors. Published by Elsevier Inc. on behalf of American College of Medical Genetics and Genomics.

Published
2022

4. Whole genome sequencing for the diagnosis of neurological repeat expansion disorders in the UK: a retrospective diagnostic accuracy and prospective clinical validation study

Author

Kristina Ibañez, James Polke, R Tanner Hagelstrom, Egor Dolzhenko, Dorota Pasko, Ellen Rachel Amy Thomas, Louise C Daugherty, Dalia Kasperaviciute, Katherine R Smith, Zandra C Deans, Sue Hill, Tom Fowler, Richard H Scott, John Hardy, Patrick F Chinnery, Henry Houlden, Augusto Rendon, Mark J Caulfield, Michael A Eberle, Ryan J Taft, Arianna Tucci, Ellen M McDonagh, Antonio Rueda, Dimitris Polychronopoulos, Georgia Chan, Heather Angus-Leppan, Kailash P Bhatia, James E Davison, Richard Festenstein, Pietro Fratta, Paola Giunti, Robin Howard, Laxmi Venkata, Matilde Laurá, Meriel McEntagart, Lara Menzies, Huw Morris, Mary M Reilly, Robert Robinson, Elisabeth Rosser, Francesca Faravelli, Anette Schrag, Jonathan M Schott, Thomas T Warner, Nicholas W Wood, David Bourn, Kelly Eggleton, Robyn Labrum, Philip Twiss, Stephen Abbs, Liana Santos, Ghareesa Almheiri, Isabella Sheikh, Jana Vandrovcova, Christine Patch, Ana Lisa Taylor Tavares, Zerin Hyder, Anna Need, Helen Brittain, Emma Baple, Loukas Moutsianas, Viraj Deshpande, Denise L Perry, Subramanian S. Ajay, Aditi Chawla, Vani Rajan, Kathryn Oprych, Angela Douglas, Gill Wilson, Sian Ellard, I Karen Temple, Andrew Mumford, Dom McMullan, Kikkeri Naresh, Frances A Flinter, Jenny C Taylor, Lynn Greenhalgh, William Newman, Paul Brennan, John A Sayer, F Lucy Raymond, Lyn S Chitty, John C. Ambrose, Prabhu Arumugam, Marta Bleda, Freya Boardman-Pretty, Jeanne M. Boissiere, Christopher R. Boustred, Clare E.H. Craig, Anna de Burca, Andrew Devereau, Greg Elgar, Rebecca E. Foulger, Pedro Furió-Tarí, Joanne Hackett, Dina Halai, Angela Hamblin, Shirley Henderson, James Holman, Tim J.P. Hubbard, Rob Jackson, Louise J. Jones, Melis Kayikci, Lea Lahnstein, Kay Lawson, Sarah E.A. Leigh, Ivonne U.S. Leong, Javier F. Lopez, Fiona Maleady-Crowe, Joanne Mason, Michael Mueller, Nirupa Murugaesu, Chris A. Odhams, Daniel Perez-Gil, John Pullinger, Tahrima Rahim, Pablo Riesgo-Ferreiro, Tim Rogers, Mina Ryten, Kevin Savage, Kushmita Sawant, Afshan Siddiq, Alexander Sieghart, Damian Smedley, Alona Sosinsky, William Spooner, Helen E. Stevens, Alexander Stuckey, Razvan Sultana, Simon R. Thompson, Carolyn Tregidgo, Emma Walsh, Sarah A. Watters, Matthew J. Welland, Eleanor Williams, Katarzyna Witkowska, Suzanne M. Wood, and Magdalena Zarowiecki

Subjects
Fragile X Mental Retardation Protein, DNA Repeat Expansion, Whole Genome Sequencing, Whole Genome Sequencing/methods, Humans, Neurology (clinical), Prospective Studies, Child, Fragile X Mental Retardation Protein/genetics, State Medicine, United Kingdom, Retrospective Studies
Abstract

BACKGROUND: Repeat expansion disorders affect about 1 in 3000 individuals and are clinically heterogeneous diseases caused by expansions of short tandem DNA repeats. Genetic testing is often locus-specific, resulting in underdiagnosis of people who have atypical clinical presentations, especially in paediatric patients without a previous positive family history. Whole genome sequencing is increasingly used as a first-line test for other rare genetic disorders, and we aimed to assess its performance in the diagnosis of patients with neurological repeat expansion disorders.METHODS: We retrospectively assessed the diagnostic accuracy of whole genome sequencing to detect the most common repeat expansion loci associated with neurological outcomes (AR, ATN1, ATXN1, ATXN2, ATXN3, ATXN7, C9orf72, CACNA1A, DMPK, FMR1, FXN, HTT, and TBP) using samples obtained within the National Health Service in England from patients who were suspected of having neurological disorders; previous PCR test results were used as the reference standard. The clinical accuracy of whole genome sequencing to detect repeat expansions was prospectively examined in previously genetically tested and undiagnosed patients recruited in 2013-17 to the 100 000 Genomes Project in the UK, who were suspected of having a genetic neurological disorder (familial or early-onset forms of ataxia, neuropathy, spastic paraplegia, dementia, motor neuron disease, parkinsonian movement disorders, intellectual disability, or neuromuscular disorders). If a repeat expansion call was made using whole genome sequencing, PCR was used to confirm the result.FINDINGS: The diagnostic accuracy of whole genome sequencing to detect repeat expansions was evaluated against 793 PCR tests previously performed within the NHS from 404 patients. Whole genome sequencing correctly classified 215 of 221 expanded alleles and 1316 of 1321 non-expanded alleles, showing 97·3% sensitivity (95% CI 94·2-99·0) and 99·6% specificity (99·1-99·9) across the 13 disease-associated loci when compared with PCR test results. In samples from 11 631 patients in the 100 000 Genomes Project, whole genome sequencing identified 81 repeat expansions, which were also tested by PCR: 68 were confirmed as repeat expansions in the full pathogenic range, 11 were non-pathogenic intermediate expansions or premutations, and two were non-expanded repeats (16% false discovery rate).INTERPRETATION: In our study, whole genome sequencing for the detection of repeat expansions showed high sensitivity and specificity, and it led to identification of neurological repeat expansion disorders in previously undiagnosed patients. These findings support implementation of whole genome sequencing in clinical laboratories for diagnosis of patients who have a neurological presentation consistent with a repeat expansion disorder.FUNDING: Medical Research Council, Department of Health and Social Care, National Health Service England, National Institute for Health Research, and Illumina.

Published
2022
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